An air flow heating device and an aerosol generating device

Abstract

The present invention discloses an air flow heating device and an aerosol generating device, relating to the field of aerosol generating devices. The air flow heating component includes a plurality of air guiding channels and grooves. The air guiding channels penetrate through the air flow heating component along a first direction. The air flow heating component is used to heat the gas in the air guiding channels, and the heated gas is used to heat the aerosol generating article. The groove has a first surface extending along a second direction, and the first surface is disposed inside the air flow heating component; a temperature measuring unit, at least part of which is inserted into the air guiding channel along the first direction, and at least part of which is placed on the first surface; wherein, an included angle exists between the second direction and the first direction. With the above structure, the temperature measuring element can be directly placed on the first surface from the notch of the groove, and the first surface is disposed inside the air flow heating element, so as to improve the measurement accuracy of the temperature measuring element and facilitate installation at the same time.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of aerosol generating devices, and in particular, to an air flow heating device and an aerosol generating device. Background Art

[0002] Tobacco products mainly appear in the market in the forms of cigarettes, cigars, cut tobacco, and re-dried tobacco leaves. And a large amount of toxic substances will be produced after the combustion of tobacco products. The active ingredient in cigarettes is mainly nicotine. During smoking, nicotine together with the nicotine suspension particles generated during the combustion of cigarettes is inhaled into the alveoli and quickly absorbed by the smoker. Once nicotine is absorbed into the smoker's blood, nicotine then affects the nerve endings of the smoker's central nervous system.

[0003] An aerosol generating device needs to strictly control the temperature so that the aerosol generating device can generate aerosol for users to use. The commonly used design method at present is to install the heating element in the housing, and the temperature measurement module is installed on the surface of the heating element close to the housing, so that the temperature measurement module can measure the temperature of the heating element. Although this method can directly measure the temperature of the heating element because the temperature measurement module is installed on the surface of the heating element, it is easily interfered by other parts or the environment, reducing the accuracy of temperature measurement. Summary of the Invention

[0004] The present invention provides an air flow heating device and an aerosol generating device to solve the above technical problems. To improve the accuracy of temperature measurement of the air flow heating device and facilitate installation.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] An air flow heating device, comprising: an air flow heating component, the air flow heating component is provided with a plurality of air guiding channels and grooves, the air guiding channels penetrate the air flow heating component along a first direction, the air flow heating component is used to heat the gas in the air guiding channels, and the heated gas is used to heat the aerosol generating article, the groove has a first surface extending along a second direction, and the first surface is arranged inside the air flow heating component;

[0007] A temperature measurement unit, at least partially inserted into the air guiding channel along the first direction and at least partially placed on the first surface; wherein, an included angle exists between the second direction and the first direction.

[0008] In some embodiments, the groove is arranged at one end of the air flow heating component along the first direction close to the aerosol generating article.

[0009] In some embodiments, the temperature measuring unit includes a first electrode and a second electrode; one ends of the first electrode and the second electrode are connected to form a connection end, and the other ends of the first electrode and the second electrode are insulated to form respective extension ends; the connection end is disposed on the groove, and the extension ends extend along the first direction and away from the air flow heating component.

[0010] In some embodiments, the extension ends of the first electrode and the second electrode are respectively in different air guiding channels.

[0011] In some embodiments, the air flow heating device further includes a heat shrinkable sleeve sleeved on the extension ends of the first electrode and the second electrode, and the heat shrinkable sleeve is used for fixing the extension ends of the first electrode and the second electrode.

[0012] In some embodiments, the air flow heating device further includes a coil and a bracket, the coil is wound around the bracket, and the air flow heating component is disposed inside the bracket around which the coil is wound; the material of the air flow heating component includes graphite alloy.

[0013] In some embodiments, the air flow heating device further includes a resistance heating element wound around the outside or inside of the air flow heating component, and the resistance heating element is used to provide a heat source for the air flow heating component.

[0014] In some embodiments, the air flow heating device further includes a pipe body sleeved on the outside of the air flow heating component; at least a partial outer side surface of the air flow heating component is concave inward in a direction away from the pipe body to form a recess, and the recess and the pipe body together enclose an air guiding through hole.

[0015] In some embodiments, the air flow heating component further includes a pipe body; the air flow heating component includes an integrally formed first part and a second part, and the distance between the first part and the pipe body is less than the distance between the second part and the pipe body.

[0016] This embodiment also provides an aerosol generating device, including a housing, an air flow heating device as described in any one of claims 1 to 9 disposed inside the housing, and a tubular body disposed inside the housing; an accommodation cavity for placing the aerosol generating article is formed inside the tubular body; the accommodation cavity includes an air inlet end and an air outlet end; the air flow heating device is disposed at the air inlet end of the accommodation cavity; wherein, the tubular body includes at least one of a heating tube body, a heat conducting pipe fitting or a heat insulating pipe body. Description of the Drawings

[0017] Figure 1A perspective view of an aerosol generating device provided in one embodiment of the present application;

[0018] Figure 2 A perspective view of an air flow heating device provided in one embodiment of the present application

[0019] Figure 3 An exploded view of an air flow heating device provided in one embodiment of the present application;

[0020] Figure 4 Provided in one embodiment of the present application Figure 2 A sectional view of the A side of Detailed Description of the Invention

[0021] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar components or components with the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation to the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0022] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0023] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection or an indirect connection through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0024] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0025] In addition, the terms "comprising", "having", and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or display that comprises a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or displays.

[0026] The following will be combined with Figures 1-4 , and a detailed description will be given of an air flow heating device and an aerosol generating device related to the embodiments of the present application. It should be noted that the following embodiments are only used to explain the present application and do not constitute a limitation to the present application.

[0027] This embodiment provides an air flow heating device and an aerosol generating device. Please refer to Figure 1 , which shows a perspective view of an aerosol generating device 1000 provided by one of the embodiments of the present application. The aerosol generating device 1000 includes a housing (not shown in the figure), an air flow heating device 100 disposed inside the housing, and a tubular body (40) disposed inside the housing; an accommodation cavity for placing an aerosol generating article 200 is formed inside the tubular body 40.

[0028] In the direction of the air flow, the accommodation cavity includes an air inlet end (bottom end) and an air outlet end (top end); the air flow heating device 100 is disposed at the air inlet end of the accommodation cavity. Among them, the tubular body 40 includes at least one of a heating tube body, a heat conducting pipe fitting, or a heat insulating tube body. Among them, the aerosol generating article may be a heat-not-burn tobacco product. The outer contour of the housing is set in a shape that is convenient for holding, such as a columnar shape, a cuboid shape, a cube shape, or other irregular shapes, for the convenience of use by the user.

[0029] For the above-mentioned air flow heating device 100, please refer to Figures 2 to 4 , which respectively show a perspective view of the air flow heating device 100 provided by one of the embodiments of the present application, an exploded view of the air flow heating device 100 provided by one of the embodiments of the present application, and the Figure 2Cross-sectional view of side A, in combination with other attached drawings. The air flow heating device 100 includes an air flow heating member 10 and a temperature measuring element 20. The air flow heating member 10 is provided with a plurality of air guiding channels 11 and grooves 12. The air guiding channels 11 penetrate through the air flow heating member 10 along the first direction F1. The air flow heating member 10 is used to heat the gas in the air guiding channels 11, and the heated gas is used to heat the aerosol generating article. The groove 12 has a first surface 121 extending along the second direction F2, and the first surface 121 is disposed inside the air flow heating member 10. The temperature measuring element 20 is at least partially inserted into the air guiding channel 11 along the first direction F1, and the temperature measuring element 20 is at least partially placed on the first surface 121. The temperature measuring element 20 has a second surface 21, and the second surface 21 is disposed opposite to the first surface 121 perpendicular to the second direction F2. The temperature measuring element 20 and the air flow heating member 10 are connected at the first surface 121 and the second surface 21. There is an included angle between the second direction F2 and the first direction F1.

[0030] It should be noted that the groove 12 communicates with the air guiding channel 11. The temperature measuring element 20 can be inserted into the groove 12 from the notch of the groove 12 and then extend outside the air flow heating member 10 through the air guiding channel 11; the temperature measuring element 20 can also enter the air flow heating member 10 from the air inlet end of the air guiding channel 11 and extend to the groove.

[0031] The temperature measuring element 20 uses a thermocouple. By using a thermocouple, the temperature measuring efficiency of the temperature measuring element 20 is improved. Compared with the resistive temperature measuring element used in the prior art, the thermocouple has many advantages such as simple structure, convenient manufacturing, wide measurement range, and high accuracy. At the same time, the thermocouple is a passive sensor and does not require an external power supply during measurement, which is very convenient to use. It should be noted that the two electrodes of the thermocouple are insulated from each other.

[0032] Specifically, the temperature measuring element 20 includes two electrodes. The two electrodes can be welded first, then inserted into the groove 12 through the notch of the groove 12, and extend outside the air flow heating member 10 through different air guiding channels 11; or the two electrodes can be respectively arranged inside different air guiding channels 11 (either from the air inlet end or the air outlet end of the air guiding channel 11), and then the two electrodes at one end at the notch are welded.

[0033] Specifically, the air guiding channel 11 is set in a cylindrical hole shape, and the air guiding channel 11 can also be other shapes; by increasing the number of air guiding channels 11, the heat transfer area between the air flow and the air flow heating member 10 can be increased, thereby improving the heating efficiency of the air flow.

[0034] In the embodiment of the present application, there is an included angle between the setting direction of the first surface 121 and the first direction F1. This design enables the part of the temperature measuring element 20 inserted into the air guiding channel 12 to be clamped to the first surface 121 together with the air flow heating element 10, so that the temperature measuring element 20 can be fixed inside the air flow heating element 10, which is beneficial to measuring the temperature inside the air flow heating element 10. Specifically, the first surface 121 is communicated with the air guiding channel 11, that is, the temperature measuring point of the temperature measuring element 20 is located inside the air flow heating element 10, and the temperature measuring point is simultaneously located at the position where the temperature changes fastest in the air flow heating element 10. Since every time the hot air flow is discharged with the user's suction action, the cold air will re-enter the air flow heating element 10, making the temperature inside the air flow heating element 10, especially in the area where the air guiding channels are dense, change very rapidly. The temperature measuring element 20 is located inside the air flow heating element 10, which is beneficial to more accurately detect the temperature change inside the air flow heating element 10, reflect the real temperature condition of the air flow heating element 10, and is beneficial to accurate temperature control.

[0035] Optionally, there is an included angle between the second direction F2 and the first direction F1, and this included angle can be any angle; in the embodiment of the present application, the second direction F2 is perpendicular to the first direction F1, so as to prevent the temperature measuring element 20 from coming out of the air flow heating element 10 relatively.

[0036] Optionally, the air flow heating element 10 and the temperature measuring element 20 can be further fixed at the first surface 121 and the second surface 21 by connection forms such as clamping, welding or bonding.

[0037] It should be noted that the groove 12 is arranged at one end of the air flow heating element 10 close to the aerosol generating article along the first direction F1. Optionally, the first surface 121 of the groove 12 is not coplanar with the surface of the air flow heating element 10 close to the aerosol generating article, that is, the first surface 121 and the surface of the air flow heating element 10 close to the aerosol generating article can be relatively far away from each other. Specifically, the degree of separation between the first surface 121 and the surface of the air flow heating element 10 close to the aerosol generating article only needs to enable the temperature measuring element 20 to be arranged inside the air flow heating element 10 without protruding from the surface of the air flow heating element 10, so as to minimize the material loss of the air flow heating element 10 caused by the groove 12 and prevent the reduction of the air heating performance of the air flow heating element 10. Specifically, the first surface 121 can also be arranged at the radial center position of the air flow heating element 10, so that the temperature measuring element 20 is arranged in the area where the temperature change is the most intense inside the air flow heating element 10, which is beneficial to sensitively identifying the temperature change.

[0038] It is worth mentioning that the air guiding channels 111 are evenly distributed on the heating element 10. The evenly distributed air guiding channels 11 can effectively improve the heating efficiency of the air flow in the air guiding channels 11, so that the heated gas has more sufficient heat and enters the aerosol generating article more evenly, thereby generating aerosol.

[0039] For the above temperature measuring element 20, please refer to Figure 3 and Figure 4 , and in combination with other drawings. The temperature measuring element 20 includes a first electrode 22 and a second electrode 23; one ends of the first electrode 22 and the second electrode 23 are connected to form a connection end 24, and the other ends of the first electrode 22 and the second electrode 23 are insulated to form respective extension ends 25; the connection end 24 is arranged on the groove 12, and the extension ends 25 extend along the first direction F1 and away from the air flow heating element 10. Specifically, the second surface 21 is arranged on the connection end 24, that is, the connection end 24 is arranged on the first surface 121. It is worth mentioning that the extension ends 25 of the first electrode 22 and the second electrode 23 are respectively in different air guiding channels 11, so that the temperature measuring element 20 can be mounted in the air flow heating element 10. That is, the first electrode 22 extends into the groove 12 from an air guiding channel 11 (or enters an air guiding channel 11 from the groove 12), the second electrode 23 extends into the groove 12 from another air guiding channel 11 (or enters an air guiding channel 11 from the groove 12), the first electrode 22 and the second electrode 23 are connected to obtain the connection end 24 by welding, and by pulling the extension ends of the first electrode 22 and / or the second electrode 23, the connection end 24 is fixed to the first surface 121; or, the first electrode 22 and the second electrode 23 are first connected to obtain the connection end 24 by welding, and then after passing the extension ends 25 through different air guiding channels 11, the extension ends of the first electrode 22 and / or the second electrode 23 are pulled, so that the connection end 24 is located above the first surface 121.

[0040] In the embodiments of the present application, please refer to Figure 3 , and in combination with other drawings. The air flow heating device 100 further includes a heat shrinkable sleeve 30, and the heat shrinkable sleeve 30 is sleeved on the extension ends 25 of the first electrode 22 and the second electrode 23. After the connection ends of the first electrode 22 and the second electrode 23 are fixed to the first surface, the extension ends 25 of the first electrode 22 and the second electrode 23 are fixed by the heat shrinkable sleeve 30, so that the temperature measuring element 20 is very firmly fixed inside the air flow heating device 100 and is not easily detached. The material of the heat shrinkable sleeve 30 is a heat shrinkable material, which simply and easily makes the fixing of the extension ends 25 of the first electrode 22 and the second electrode 23 more tight and not easily detached.

[0041] In an embodiment of the present application, the air flow heating device 100 further includes a coil (not shown in the figure) and a bracket (not shown in the figure). The coil is wound around the bracket, and the air flow heating element 10 is disposed inside the bracket around which the coil is wound. The material of the air flow heating element 10 is graphite alloy. The coil is electrically connected to a power supply electronic component outside the air flow heating device 100. A magnetic field is formed by passing a current through the coil, and the air flow heating element 10 made of graphite alloy is heated by electromagnetic induction. The coil generates an alternating magnetic field. When the air flow heating element 10 made of graphite alloy is disposed inside the alternating magnetic field, the surface of the air flow heating element 10 cuts the alternating magnetic force lines, so that an alternating current (i.e., eddy current) is generated in the air flow heating element 10. The eddy current makes the carriers in the air flow heating element 10 move at high speed and randomly. The carriers collide and rub against the atoms to generate heat energy. Thus, the effect of heating the aerosol product is achieved. Since the air flow heating element 10 generates heat by itself and does not need to conduct heat through a heat conducting element, the heat conversion rate is extremely high.

[0042] In some other embodiments, the air flow heating device 100 further includes a resistance heating element, such as a resistance heating mesh, a resistance heating film, or a resistance heating wire, etc. (not shown in the figure). The resistance heating element is wound around the outside or inside of the air flow heating element 10. The resistance heating element provides a heat source for the air flow heating element 10, and then the air flow passing through the air flow heating element 10 is heated by the air flow heating element 10. At this time, the air flow heating element 10 may include a material with a relatively high heat conduction efficiency, such as ceramics or metal. In some cases, an air gap may be formed inside the air flow heating element 10 for the air flow to pass through. At the same time, the air flow heating element 10 has the property of resistance heating. A voltage can be directly applied to the air flow heating element 10, so that the air flow heating element 10 generates heat by itself and conducts heat to the air flow passing through it. At this time, the air flow heating element 10 may be a metal rod or a metal mesh, which can both generate heat by resistance and has a high heat conduction efficiency.

[0043] In an embodiment of the present application, please refer to Figure 3 and combine with other drawings. The air flow heating device 100 further includes a pipe fitting body 40. The pipe fitting body 40 is sleeved outside the air flow heating element 10 to fix the air flow heating element 10. At least a partial outer side surface of the air flow heating element 10 is recessed inward in a direction away from the pipe fitting body 40 to form a recess 15. The recess 15 and the pipe fitting body 40 jointly enclose a gas guiding through hole 14, increasing the number of gas guiding through holes 14 of the air flow heating element 10, enabling the air flow heating element 10 to contact the gas more fully, and improving the heat conduction efficiency of the air flow heating element 10.

[0044] In an embodiment of the present application, please refer to Figure 3, the air flow heating element 10 is an integrally formed unit. To facilitate the description of its structural features, the air flow heating element 10 includes an integrally molded first part 15 and a second part 16. The distance between the first part 15 and the pipe fitting body 40 is less than the distance between the second part 16 and the pipe fitting body 40. Since the heating method of heating the gas in the heating air guiding channel 11 of the present application consumes more electric energy to generate heat, the surface area of the second part 16 of the air flow heating element 10 is reduced, so that the overall mass of the air flow heating element 10 is reduced; however, the sufficiently long air guiding channel 11 formed in the first part 15 and the second part 16 of the air flow heating element 10 is retained, especially the air guiding channel 11 in the middle part, which ensures that the air flow can be fully heated while saving energy consumption.

[0045] In some embodiments, the recess 13 is provided in the first part 15.

[0046] The air flow heating device 100 provided by the embodiment of the present application includes an air flow heating element 10 and a temperature measuring element 20. The air flow heating element 10 is provided with a plurality of air guiding channels 11 and grooves 12. The air guiding channels 11 penetrate through the air flow heating element 10 along the first direction F1. The air flow heating element 10 is used to heat the gas in the air guiding channels 11, and the heated gas is used to heat the aerosol generating article. The groove 12 has a first surface 121 extending along the second direction F2, and the first surface 121 is provided inside the air flow heating element 10. The temperature measuring element 20 is at least partially inserted into the air guiding channel 11 along the first direction F1 and at least partially placed on the first surface 121. Among them, there is an included angle between the second direction F2 and the first direction F1. Through the above structure, the temperature measuring element 20 can be directly placed on the first surface 121 from the notch of the groove 12, and the first surface 121 is provided inside the air flow heating element 10, so as to improve that the temperature change of the air flow heating element 10 can be sensitively measured by the temperature measuring element 20 and is convenient for installation.

[0047] The present application also provides an aerosol generating device 1000, which includes an air flow heating device 100, a housing, and a pipe fitting body 40. Among them, the air flow heating device 100, the housing, and the pipe fitting body 40 have the same structures as above and will not be described in detail one by one. Similarly, the aerosol generating device 1000 can effectively improve the temperature measurement accuracy of the air flow heating device and is convenient for installation.

[0048] The beneficial effects of the intelligent ashtray provided by the present application include but are not limited to:

[0049] Through an air flow heating device and an aerosol generating device provided by an embodiment of the present application, the temperature measuring element can be directly placed on the first surface from the notch of the groove, and the first surface is provided inside the air flow heating element, so as to improve the measurement accuracy of the temperature measuring element and be convenient for installation.

[0050] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An air flow heating device, characterized in that, Comprising: An air flow heating component, the air flow heating component being provided with a plurality of air guiding channels and grooves, the air guiding channels penetrating through the air flow heating component along a first direction, the air flow heating component being configured to heat the gas in the air guiding channels, and the heated gas being used to heat the aerosol generating article, the groove having a first surface extending along a second direction, the first surface being disposed inside the air flow heating component; A temperature measuring unit, at least partially inserted into the air guiding channel along the first direction and at least partially placed on the first surface; wherein, there is an included angle between the second direction and the first direction; The groove is disposed at one end of the air flow heating component along the first direction and close to the aerosol generating article; The temperature measuring unit includes a first electrode and a second electrode; one ends of the first electrode and the second electrode are connected to form a connection end, and the other ends of the first electrode and the second electrode are insulated and disposed to form respective extending ends; the connection end is disposed on the groove, and the extending ends extend along the first direction and away from the air flow heating component; The air flow heating device further includes a heat shrinkable sleeve, the heat shrinkable sleeve being sleeved on the extending ends of the first electrode and the second electrode, and the heat shrinkable sleeve being configured to fix the extending ends of the first electrode and the second electrode; The air flow heating device further includes a pipe fitting body, the pipe fitting body being sleeved outside the air flow heating component; at least a partial outer side surface of the air flow heating component is concave inward facing away from the pipe fitting body to form a recess, and the recess and the pipe fitting body jointly enclose an air guiding through hole.

2. The air flow heating device according to claim 1, wherein, The extending ends of the first electrode and the second electrode are respectively in different air guiding channels.

3. The air flow heating device according to claim 1, characterized in that, The air flow heating device further includes a coil and a bracket, the coil being wound around the bracket, and the air flow heating component being disposed inside the bracket around which the coil is wound; the material of the air flow heating component includes graphite alloy.

4. The air flow heating device according to claim 1, characterized in that, The air flow heating device further includes a resistance heating element, the resistance heating element being wound around the outside or inside of the air flow heating component, and the resistance heating element being configured to provide a heat source for the air flow heating component.

5. The air flow heating device according to claim 1, characterized in that, The air flow heating component further includes a pipe fitting body; the air flow heating component includes an integrally formed first part and a second part, and the distance between the first part and the pipe fitting body is less than the distance between the second part and the pipe fitting body.

6. An aerosol generating device, characterized in that, Comprising a housing, the air flow heating device according to any one of claims 1 to 5 disposed inside the housing, and a tubular body disposed inside the housing; an accommodation cavity for placing the aerosol generating article is formed inside the tubular body; the accommodation cavity includes an air inlet end and an air outlet end; the air flow heating device is disposed at the air inlet end of the accommodation cavity; wherein, the tubular body includes at least one of a heating pipe body, a heat conducting pipe fitting or a heat insulating pipe body.

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