Aerosol-generating device

Abstract

The present application discloses an aerosol generating device, comprising: a heating chamber for accommodating at least a portion of an aerosol generating product and heating the at least a portion of the aerosol generating product; the air inlet hole provides an inlet for external air to enter the aerosol generating device; the air inlet channel is arranged between the air inlet hole and the heating chamber; wherein the air inlet channel comprises a first air inlet channel and a second air inlet channel, the first air inlet channel comprises an inlet and an outlet which are oppositely arranged in the longitudinal direction, the inlet is used for allowing a cleaning tool to stretch in, and the outlet is communicated to the heating cavity so as to guide external air into the heating cavity; the second air inlet channel is communicated with the air inlet hole and the first air inlet channel, and a temperature sensing element is arranged in the second air inlet channel. In this way, the temperature sensing element can be prevented from being damaged when the air inlet channel is cleaned.

Description

[Technical field]

[0001] The utility model relates to the technical field of aerosols, in particular to an aerosol generating device. [Background technology]

[0002] Traditional tobacco-generating substrates (e.g., cigarettes, cigars, etc.) burn tobacco to generate tobacco smoke during use. Products that release compounds by heating without burning are already available in the prior art to replace these traditional tobacco-generating substrates. An example of such a product is an aerosol-generating device, which generally includes a heating chamber and an air inlet channel. The heating chamber is used to accommodate and heat an aerosol-generating product (e.g., a cigarette) used in conjunction with the aerosol-generating device, and the air inlet channel is used to introduce external air into the heating chamber, thereby allowing external air to enter the aerosol-generating product.

[0003] In addition, aerosol generating devices usually need to count the number of puffs of aerosol generating products. Among the existing methods for counting the number of puffs, some adopt a method of setting a temperature sensing element in the air inlet passage, and the temperature sensing element senses the cold air outside during puffing to achieve the purpose of counting the number of puffs. However, this method has the probability of easily damaging the temperature sensing element when cleaning the air inlet passage. [Contents of the utility model]

[0004] The present application provides an aerosol generating device to avoid damaging a temperature sensing element when cleaning an air intake passage.

[0005] An aerosol generating device for heating an aerosol generating article to generate an aerosol, comprising:

[0006] a heating chamber for receiving at least a portion of the aerosol-generating article and heating at least a portion of the aerosol-generating article;

[0007] An air inlet hole, providing an inlet for external air to enter the aerosol generating device;

[0008] An air inlet passage, disposed between the air inlet hole and the heating chamber;

[0009] Among them, the air inlet channel includes a first air inlet channel and a second air inlet channel, the first air inlet channel includes an inlet and an outlet arranged opposite to each other in the longitudinal direction, the inlet is used for allowing a cleaning tool to be inserted, and the outlet is connected to the heating chamber to guide external air into the heating chamber; the second air inlet channel is connected to the air inlet hole and the first air inlet channel, and a temperature sensing element is arranged in the second air inlet channel.

[0010] In one embodiment, the second air intake passage includes a first section vertically connected to the first air intake passage, and the temperature sensing element is disposed in the first section.

[0011] In one embodiment, the second air inlet passage includes a second section arranged in parallel with the first air inlet passage, and the second section is connected to the first section and the air inlet hole.

[0012] In one of the embodiments, during use, the inlet of the first air inlet passage is closed, and airflow enters the second air inlet passage only from the air inlet hole.

[0013] In one embodiment, the air inlet hole includes a first air inlet hole and a second air inlet hole that are spaced apart from each other, the inlet is connected to the first air inlet hole and the heating chamber, and the second air inlet channel is connected to the first air inlet channel and the second air inlet hole.

[0014] In one embodiment, the aperture of the first air inlet hole is larger than the aperture of the second air inlet hole.

[0015] In one embodiment, the aerosol generating device includes a first ventilation tube, the first ventilation tube includes a first open end and a second open end arranged opposite to each other in a longitudinal direction, the first open end faces the heating chamber, a portion of the first air inlet channel extends between the first open end and the second open end, and a protrusion extends from the tube wall of the first ventilation tube, and the protrusion defines a portion of the second air inlet channel.

[0016] In one embodiment, the aerosol generating device further comprises a second ventilation tube defining the second air inlet channel, the second ventilation tube comprises a sleeve portion sleeved on the protruding portion, and the temperature sensing element is disposed in the sleeve portion.

[0017] In one embodiment, the protrusion is adjacent to the heating chamber, and the temperature sensing element is at least partially arranged inside the protrusion.

[0018] In one embodiment, the aerosol generating device further comprises a detachable bottom cover for covering or exposing the inlet.

[0019] The aerosol generating device provided by the present application has an inlet for a cleaning tool to extend into the first air inlet channel, and introduces external air into the heating chamber through the outlet of the first air inlet channel. The second air inlet channel connects the air inlet hole and the first air inlet channel, and the temperature sensing element is arranged in the second air inlet channel, so as to avoid damage to the temperature sensing element when the cleaning tool is used to clean the air inlet channel. At the same time, when the external air passes through the second air inlet channel, it can be sensed by the temperature sensing element, thereby changing the sensed temperature of the temperature sensing element, and the controller can confirm that the user has inhaled according to the change.

Brief Description of the Drawings

[0020] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0021] Figure 1 A cross-sectional schematic diagram of an aerosol generating device provided in one embodiment of the present application;

[0022] Figure 2 A cross-sectional schematic diagram of an aerosol generating device provided in another embodiment of the present application;

[0023] Figure 3 for Figure 1 An enlarged schematic diagram of the first air inlet channel and the second air inlet channel area;

[0024] Figure 4 for Figure 1 A three-dimensional schematic diagram of the first ventilation pipe in one direction;

[0025] Figure 5 for Figure 1 A three-dimensional schematic diagram of the second ventilation pipe in one direction;

[0026] Figure 6 for Figure 1 Schematic diagram of an exploded view of an aerosol generating device at one viewing angle. [Specific implementation method]

[0027] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" / "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "upper", "lower", "left", "right", "inside", "outside" and similar expressions used in this specification are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0029] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] In the embodiments of the present utility model, the "installation" includes fixing or restricting a component or device to a specific position or place by welding, screwing, clamping, bonding, etc. The component or device can remain stationary at the specific position or place or move within a limited range. After the component or device is fixed or restricted to a specific position or place, it may or may not be disassembled, and there is no limitation in the embodiments of the present utility model.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] An embodiment of the present application provides an aerosol generating device 100, such as Figure 1 As shown, the aerosol generating device 100 includes a heating tube 10, which is hollow to define a heating chamber 11. The heating chamber 11 is used to accommodate an aerosol generating product 200 used in conjunction with the aerosol generating device. When the aerosol generating product 200 is accommodated in the heating chamber 10, the heating tube 10 can heat the aerosol generating product 200, so that part of the active substance filled in the aerosol generating product 200 is volatilized by heat to generate an aerosol, and the user can inhale the aerosol by inhaling on the aerosol generating product 200.

[0033] In some embodiments, please refer to Figure 1A heating element 20 is attached to the outer wall of the heating tube 10. The heating element 20 can be a mesh resistive heating body, a heating film, or the heating material is printed on the outer wall of the heating tube 10 by thick film printing. The heating element 20 is electrically connected to the main board 30. The controller on the main board 30 can control the battery 40 to provide electrical energy to the heating element 20. After the heating element 20 is energized, it generates heat, and the heat can be transferred to the heating chamber 11 to heat the aerosol generating product 200.

[0034] In some embodiments, the aerosol generating device 100 can also heat the aerosol generating product 200 by electromagnetic induction heating. The outside of the heating tube 10 is surrounded by an induction coil (not shown), and the controller controls the battery 40 to pass an alternating current into the induction coil. The induction coil generates a changing magnetic field under the action of the alternating current. The changing magnetic field penetrates the heating tube 10 and induces eddy currents in the heating tube 10. The heating tube 10 generates heat under the action of the eddy current effect and the hysteresis effect, and then the aerosol generating product 200 in the heating chamber 11 can be heated.

[0035] Suitable materials for the heating tube 10 may be any one of graphite, molybdenum, silicon carbide, stainless steel, niobium, aluminum, nickel, iron, copper, nickel-containing compounds, titanium, and metal material composites. In some embodiments, in order to better induce eddy currents to improve heating efficiency, the material of the heating tube 10 is preferably ferromagnetic material or composed of ferromagnetic materials, such as ferrite iron, ferromagnetic alloys (such as ferromagnetic steel or stainless steel), ferromagnetic particles, and ferrites.

[0036] The aerosol generating article 200 preferably uses a tobacco-containing material that releases volatile compounds from the article when heated; or it can also be a non-tobacco material that can be heated and suitable for electric heating and smoking. The aerosol generating article 200 preferably uses a solid substrate, which can include one or more of powder, particles, fragments, strips or sheets of one or more of herb leaves, tobacco leaves, homogenized tobacco, and expanded tobacco; or the solid substrate can contain additional tobacco or non-tobacco volatile flavor compounds to be released when the substrate is heated.

[0037] The aerosol generating device 100 includes an air inlet channel for guiding external air into the heating chamber 11. When the user inhales on the aerosol generating product 200, the external air enters the heating chamber 11 through the air inlet channel and then enters the aerosol generating product 200. The external air can carry the aerosol generated by volatilization in the aerosol generating product 200 to escape for the user to inhale.

[0038] like Figure 1 As shown, the air intake passage includes a first air intake passage and a second air intake passage, respectively. Figure 1In the middle arrow route 61 and the arrow route 62, the first air inlet channel 61 includes an inlet 612 and an outlet 611 arranged opposite to each other in the longitudinal direction, the outlet 611 is connected to the heating chamber 11 to guide the external air into the heating chamber 11, and the inlet 612 is used for the cleaning tool to extend into the first air inlet channel 61. At the same time, the aerosol generating device 100 is provided with a first air inlet hole 71 and a second air inlet hole 72, and the inlet 612 also connects the first air inlet hole 71 and the heating chamber 11. The second air inlet channel 62 connects the second air inlet hole 72 and the first air inlet channel 61, so that when the user inhales on the aerosol generating product 200, a part of the external air directly enters the heating chamber 11 through the first air inlet channel 61, and another part of the external air first enters the second air inlet channel 62, and then merges into the first air inlet channel 61, and finally enters the heating chamber 11 through the first air inlet channel 61.

[0039] The second air inlet channel 62 is provided with a temperature sensing element 80. When the aerosol generating device 100 starts heating, the temperature inside the aerosol generating device 100 begins to rise, which causes the temperature sensed by the temperature sensing element 80 to rise accordingly. After heating to a preset time, the temperature of the aerosol generating product 200 reaches the volatilization temperature. At this time, the user can use the aerosol generating product 200 for inhalation. The external cold air enters the second air inlet channel 62 with the user's inhalation action, which causes the temperature sensing element 80 in the second air inlet channel 62 to sense the external cold air and change the sensed temperature. The temperature change is further fed back to the controller. The controller can confirm that the user has performed the inhalation action based on the temperature change, so that the controller can count the number of puffs accordingly.

[0040] In this embodiment, a first air inlet channel 61 and a second air inlet channel 62 are provided. Since the first air inlet channel 61 is provided with an inlet 612 for a cleaning tool to extend into, and the temperature sensing element 80 is provided in the second air inlet channel 62, damage to the temperature sensing element when a cleaning tool is used to clean the air inlet channel can be avoided.

[0041] The temperature sensing element 80 may be any one of a thermocouple, a thermistor, or a semiconductor-based temperature sensor.

[0042] Further, if Figure 1 As shown, the aperture of the first air inlet hole 71 is larger than that of the second air inlet hole 72, so that more external air flows into the first air inlet channel 61, while less external air flows into the second air inlet channel 62. It is only necessary for the temperature sensing element 80 to sense the external cold air and produce temperature changes.

[0043] In some embodiments, Figure 2As shown, the aerosol generating device 100 has only one air inlet hole 71a, or in other words, the inlet 612 of the first air inlet channel 61 is closed during use. Figure 2 As shown by the arrow route in the figure, the external air first enters the second air inlet channel 62 through the air inlet hole 71a, then enters the first air inlet channel 61 through the second air inlet channel 61, and finally enters the heating chamber 11 through the first air inlet channel 61. At this time, no air enters the inlet 612 of the first air inlet channel 61, and the inlet 612 is only for the cleaning tool to be inserted. In this embodiment, by providing an air inlet hole 71a, the external cold air can be avoided from being diverted, and the external cold air can all flow into the second air inlet channel 62a through the air inlet hole 71a, so that the temperature sensing element 80 can sense the temperature change more sensitively.

[0044] In some embodiments, Figure 3 As shown, the second air intake passage 62 includes a first section 621 vertically connected to the first air intake passage 61, and the temperature sensing element 80 is arranged in the first section 621 to further reduce the probability of condensate or solid residue generated during the heating process falling into the second air intake passage 62.

[0045] In some further embodiments, please refer to Figure 3 The second air intake passage 62 further includes a second section 622 arranged in parallel with the first air intake 61 , and the second section 622 connects the air intake hole 72 and the first section 621 , so that the external cold air can be quickly sensed by the temperature sensing element 80 after entering the second air intake passage 62 .

[0046] In some embodiments, Figure 1 and Figure 4 As shown, the aerosol generating device 100 includes a first hollow ventilation tube 90, which includes a first open end 91 and a second open end 92 that are relatively arranged along the longitudinal direction, the second open end 92 being the inlet 612 of the first air inlet channel 62, the first open end 91 faces the heating chamber 11, a portion of the first air inlet channel 61 extends between the first open end 91 and the second open end 92, a protrusion 93 extends from the tube wall of the first ventilation tube 90, the protrusion 93 is hollow and connected to the hollow area of ​​the first ventilation tube 90, and a portion of the second air inlet channel 62 is defined by the protrusion 93.

[0047] When the first air inlet passage 61 needs to be cleaned, the cleaning tool only needs to be inserted into the first ventilation pipe 90 through the second opening end 92 to clean the first air inlet passage 61 .

[0048] Further, such as Figure 1 and Figure 5As shown, the aerosol generating device 100 also includes a second ventilation tube 94, which includes a socket portion 941 socketed with the protrusion 93, and an air guide portion 942 connected to the socket portion 941 and extending longitudinally, the air guide portion 942 is connected to the second air inlet hole 72 to guide external air into the socket portion 941, and then flows from the socket portion 941 to the first ventilation tube 90, and the temperature sensing element 80 is arranged in the accommodating chamber 9411 of the socket portion 941.

[0049] In some embodiments, Figure 1 As shown, at least a portion of the temperature sensing element 80 is disposed in the protrusion 93. Since the protrusion 93 is adjacent to the heating chamber 11, the temperature sensing element 80 can better sense the temperature change caused by suction.

[0050] And, in some embodiments, as Figure 6 As shown, the aerosol generating device 100 also includes a detachable bottom cover 97. When the bottom cover 97 is installed on the aerosol generating device 100, the bottom cover 97 blocks the first air inlet channel 61. When the bottom cover 97 is removed from the aerosol generating device 100, the first air inlet channel 61 is exposed, and the user can clean the first air inlet channel 61 with a cleaning tool.

[0051] It is worth mentioning that the first ventilation pipe 90 and the second ventilation pipe 94 can be made of high thermal conductivity materials, such as metal materials. Since high thermal conductivity materials have good thermal conductivity, the heat in the heating chamber 11 can be better transferred to the temperature sensing element 80. When the user inhales, the external cold air passes through the temperature sensing element 80, which can cause the temperature sensing element 80 to undergo a significant temperature change, thereby improving the sensing sensitivity of the temperature sensing element 80.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the idea of ​​the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An aerosol generating device for heating an aerosol generating article to generate an aerosol, characterized in that: include: a heating chamber for receiving at least a portion of the aerosol-generating article and heating at least a portion of the aerosol-generating article; An air inlet hole, providing an inlet for external air to enter the aerosol generating device; An air inlet passage, disposed between the air inlet hole and the heating chamber; Wherein, the air inlet passage comprises a first air inlet passage and a second air inlet passage, the first air inlet passage comprises an inlet and an outlet arranged opposite to each other in the longitudinal direction, the inlet is used for a cleaning tool to extend into, and the outlet is connected to the heating chamber to guide external air into the heating chamber; The second air inlet passage is connected to the air inlet hole and the first air inlet passage, and a temperature sensing element is arranged in the second air inlet passage.

2. The aerosol generating device according to claim 1, characterized in that: The second air intake passage includes a first section vertically connected to the first air intake passage, and the temperature sensing element is disposed in the first section.

3. The aerosol generating device according to claim 2, characterized in that: The second air intake passage includes a second section arranged in parallel with the first air intake passage, and the second section is connected to the first section and the air intake hole.

4. The aerosol generating device according to claim 1, characterized in that: In use, the inlet of the first air inlet passage is closed, and airflow enters the second air inlet passage only from the air inlet hole.

5. The aerosol generating device according to claim 1, characterized in that: The air inlet hole comprises a first air inlet hole and a second air inlet hole which are arranged at an interval, the inlet is connected with the first air inlet hole and the heating chamber, and the second air inlet channel is connected with the first air inlet channel and the second air inlet hole.

6. The aerosol generating device according to claim 5, characterized in that: The aperture of the first air inlet hole is larger than the aperture of the second air inlet hole.

7. The aerosol generating device according to claim 1, characterized in that: The aerosol generating device includes a first ventilation tube, which includes a first open end and a second open end arranged opposite to each other in a longitudinal direction, the first open end faces the heating chamber, a portion of the first air inlet channel extends between the first open end and the second open end, and a protrusion extends from the tube wall of the first ventilation tube, and the protrusion defines a portion of the second air inlet channel.

8. The aerosol generating device according to claim 7, characterized in that: The aerosol generating device further comprises a second ventilation tube defining the second air inlet channel, the second ventilation tube comprises a sleeve portion sleeved on the protruding portion, and the temperature sensing element is arranged in the sleeve portion.

9. The aerosol generating device according to claim 7, characterized in that: The protrusion is adjacent to the heating chamber, and the temperature sensing element is at least partially arranged inside the protrusion.

10. The aerosol generating device according to claim 1, characterized in that The aerosol generating device further comprises a removable bottom cover for covering or exposing the inlet.

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