Aerosol generating device and airflow heating assembly

Abstract

The utility model relates to the technical field of aerosol generating devices, in particular to an aerosol generating device for heating an aerosol generating rod through airflow and an airflow heating assembly. Due to the fact that the resistance heating piece of the airflow heating assembly is provided with the heat exchange hole, the resistance heating piece is heated after being powered on, generated heat can heat airflow passing through the heat exchange hole, and when a user smokes the aerosol generating rod, the airflow enters the containing cavity through the heat exchange hole and then enters the aerosol generating rod; the heated air flow enters the aerosol generating rod to heat the aerosol generating rod, the heating uniformity of the aerosol generating rod can be improved through the hot air flow, then the local part is prevented from being excessively baked, and therefore the problem that the current user experience is poor is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of aerosol generating devices, in particular to an aerosol generating device for heating an aerosol generating rod through airflow and an airflow heating component. Background Art

[0002] The aerosol generating device is used to heat the aerosol generating rod. The aerosol generating rod is heated to generate aerosol for the user to inhale. At present, the aerosol generating device usually uses a heating tube to heat the aerosol generating rod. When in use, the aerosol generating rod is inserted into the heating tube, and the inner surface of the heating tube contacts the outer surface of the aerosol generating rod. The aerosol generating rod is heated by heat conduction. When the aerosol generating rod is heated by this heating method, the aerosol generating rod is heated unevenly, and the part of the aerosol generating rod that contacts the heating tube is easily over-baked. The generated aerosol is easy to have a burnt smell, and the user experience is poor. Utility Model Content

[0003] The utility model provides an airflow heating component, which is used to improve the technical problem of poor user experience caused by uneven heating when an aerosol generating rod is heated.

[0004] In addition, the utility model also provides an aerosol generating device using the airflow heating component.

[0005] In a first aspect, an embodiment provides an airflow heating component, wherein the airflow heating component has a accommodating cavity for inserting an aerosol generating rod, the airflow heating component includes a resistive heating element, the resistive heating element has a plurality of heat exchange holes, the resistive heating element is used to generate heat to heat the airflow passing through the heat exchange holes after being energized; the heat exchange holes are in communication with the accommodating cavity, and are used to heat the airflow flowing toward the accommodating cavity through the resistive heating element.

[0006] Furthermore, in one embodiment, the airflow heating assembly includes a heat pipe, which is in thermal contact with the resistive heating element; the heat pipe surrounds at least a portion of the accommodating cavity so that the heat pipe can transfer heat to the periphery of the aerosol generating rod.

[0007] Furthermore, in one embodiment, the resistive heating element is disposed in the heat-conducting tube, and the resistive heating element is in thermal contact with an inner wall of the heat-conducting tube.

[0008] Furthermore, in one embodiment, the resistive heating element includes a resistive heating element, a first lead, a second lead and a peripheral conductive portion located at the periphery of the resistive heating element, the peripheral conductive portion extends along the periphery of the resistive heating element and is in conductive contact with the resistive heating element, the heat exchange hole is located on the resistive heating element, the first lead is in conductive contact with the middle part of the resistive heating element, and the second lead is in conductive contact with the peripheral conductive portion.

[0009] Furthermore, in one embodiment, the peripheral conductive portion is a conductive paste layer coated on the periphery of the resistor heating body.

[0010] Furthermore, in one embodiment, the heat pipe has a heat pipe wall hole for the second lead and / or the peripheral conductive part to pass through.

[0011] Furthermore, in one embodiment, the airflow heating assembly includes a heating tube, which can generate heat when powered on; the heating tube surrounds at least a portion of the accommodating cavity so that the heating tube can heat the periphery of the aerosol generating rod.

[0012] Furthermore, in one embodiment, the heating tube is a resistive heating tube; the resistive heating element is configured in the heating tube, and the airflow heating assembly includes a first lead and a second lead, the first lead is in conductive contact with the resistive heating element, and the second lead is in conductive contact with the outer wall of the heating tube; the heating tube is in conductive contact with the resistive heating element so that the heating tube and the resistive heating element are connected in series.

[0013] Furthermore, in one embodiment, the resistive heating element is a conductive ceramic element.

[0014] In a second aspect, an embodiment provides an aerosol generating device, comprising a shell and an airflow heating component, wherein the airflow heating component is arranged in the shell; the airflow heating component has a accommodating cavity for inserting an aerosol generating rod, and the airflow heating component comprises a resistive heating element, wherein the resistive heating element has a plurality of heat exchange holes, and the resistive heating element is used to generate heat to heat the airflow passing through the heat exchange holes after being powered on; the heat exchange holes are communicated with the accommodating cavity, and are used to heat the airflow flowing toward the accommodating cavity through the resistive heating element.

[0015] Furthermore, in one embodiment, the airflow heating assembly includes a heat pipe, which is in thermal contact with the resistive heating element; the heat pipe surrounds at least a portion of the accommodating cavity so that the heat pipe can transfer heat to the periphery of the aerosol generating rod.

[0016] Furthermore, in one embodiment, the resistive heating element is disposed in the heat-conducting tube, and the resistive heating element is in thermal contact with an inner wall of the heat-conducting tube.

[0017] Furthermore, in one embodiment, the resistive heating element includes a resistive heating element, a first lead, a second lead and a peripheral conductive portion located at the periphery of the resistive heating element, the peripheral conductive portion extends along the periphery of the resistive heating element and is in conductive contact with the resistive heating element, the heat exchange hole is located on the resistive heating element, the first lead is in conductive contact with the middle part of the resistive heating element, and the second lead is in conductive contact with the peripheral conductive portion.

[0018] Furthermore, in one embodiment, the peripheral conductive portion is a conductive paste layer coated on the periphery of the resistor heating body.

[0019] Furthermore, in one embodiment, the heat pipe has a heat pipe wall hole for the second lead and / or the peripheral conductive part to pass through.

[0020] Furthermore, in one embodiment, the airflow heating assembly includes a heating tube, which can generate heat when powered on; the heating tube surrounds at least a portion of the accommodating cavity so that the heating tube can heat the periphery of the aerosol generating rod.

[0021] Furthermore, in one embodiment, the heating tube is a resistive heating tube; the resistive heating element is configured in the heating tube, and the airflow heating assembly includes a first lead and a second lead, the first lead is in conductive contact with the resistive heating element, and the second lead is in conductive contact with the outer wall of the heating tube; the heating tube is in conductive contact with the resistive heating element so that the heating tube and the resistive heating element are connected in series.

[0022] Furthermore, in one embodiment, the resistive heating element is a conductive ceramic element.

[0023] According to the airflow heating component of the above-mentioned embodiment, since the resistive heating element of the airflow heating component has a heat exchange hole, the resistive heating element generates heat after being energized, and the heat generated can heat the airflow passing through the heat exchange hole. When the user inhales the aerosol generating stick, the airflow enters the accommodating cavity through the heat exchange hole and then enters the aerosol generating stick. The heated airflow enters the aerosol generating stick and can heat the aerosol generating stick. The hot airflow can improve the uniformity of heating of the aerosol generating stick, thereby avoiding local over-baking, thereby improving the current problem of poor user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of an aerosol generating device in an embodiment;

[0025] Figure 2is a cross-sectional view of an aerosol generating device in one embodiment;

[0026] Figure 3 A cross-sectional view of an aerosol generating rod inserted into a heat conducting tube in one embodiment;

[0027] Figure 4 A cross-sectional view of a heat pipe and a resistance heating element in an embodiment;

[0028] Figure 5 A schematic diagram of the structure of a heat pipe and a resistance heating element in an embodiment;

[0029] Figure 6 Schematic diagram of the structure of a resistive heating element in an embodiment.

[0030] List of feature names corresponding to the figure marks in the figure: 1. Aerosol generating rod; 11. Nozzle end; 12. Air inlet end; 2. Outer shell; 3. Air flow heating component; 31. Accommodating cavity; 32. Resistive heating element; 321. Heat exchange hole; 322. Resistive heating element; 323. First lead; 324. Second lead; 325. Peripheral conductive part; 33. Heat pipe; 34. First tube seat; 341. Protective cover; 35. Second tube seat; 36. Annular spacer; 4. Power supply.

[0031] Explanation on the reference numerals in brackets in the drawings: In the reference numerals in brackets in the drawings, the features referred to by the reference numerals are both the features represented by the numbers in the brackets and the features represented by the numbers outside the brackets. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0033] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0034] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0035] Please refer to Figures 1 to 3 Before introducing the heating component in detail, the heating object of the airflow heating component, i.e., the aerosol generating rod 1, is first explained. One end of the aerosol generating rod 1 is a suction nozzle end 11, and the other end is an air inlet end 12. The suction nozzle end 11 has a suction nozzle for suction, and the air inlet end 12 is used to supply gas to enter the aerosol generating rod 1 when the aerosol generating rod 1 is sucked. There is an aerosol generating matrix in the aerosol generating rod 1, and a filter element (not shown in the figure) is contained in the suction nozzle. The filter element (not shown in the figure) can adopt various existing or future feasible methods, such as sponge, filter paper, etc. The aerosol generating matrix is ​​an aerosol filament or aerosol sheet for generating aerosol.

[0036] The aerosol generating rod 1 is a heat-not-burn rod. The aerosol generating rod 1 is heated by an aerosol generating device without burning the aerosol generating rod 1. The aerosol generating rod 1 can generate aerosol after being heated.

[0037] In one embodiment, please refer to Figures 1 to 6 The aerosol generating device includes a housing 2 and an airflow heating component 3, and the airflow heating component 3 is disposed in the housing 2. A power supply 4 for supplying power to the airflow heating component 3 is disposed in the housing 2. Specifically, in one embodiment, please refer to Figure 2 The power source 4 includes a battery for supplying power to the airflow heating component 3 .

[0038] The airflow heating assembly 3 has a receiving cavity 31, and the receiving cavity 31 is inserted into the aerosol generating rod 1. The airflow heating assembly 3 includes a resistive heating element 32, and the resistive heating element 32 has a plurality of heat exchange holes 321. The resistive heating element 32 is used to generate heat after power is turned on to heat the airflow passing through the heat exchange holes 321. The heat exchange holes 321 are communicated with the receiving cavity 31, and are used to heat the airflow flowing to the receiving cavity 31 through the resistive heating element 32.

[0039] Since the resistive heating element 32 is made of conductive material, it can generate heat when powered on, quickly heating the airflow in the heat exchange hole 321. After the heated airflow enters the aerosol generating rod 1, it can evenly heat the aerosol generating rod 1, thereby improving the problem of uneven heating of the aerosol generating rod 1.

[0040] Regarding the resistance heating element 32, the resistance heating element 32 can be made of any feasible conductive material. Since the resistance heating element 32 needs to have the characteristics of high temperature resistance, high electrical conductivity and high thermal conductivity, in one embodiment, please refer to Figure 5 and Figure 6 The resistance heating element 32 is a conductive ceramic element. In some other embodiments, the resistance heating element 32 can also be made of graphite material.

[0041] The accommodating chamber 31 can be provided in any feasible manner:

[0042] For example, in one embodiment, please refer to Figures 4 to 6 The airflow heating assembly 3 includes a heat pipe 33, which is in thermal contact with the resistance heating element 32. The heat pipe 33 surrounds at least a portion of the accommodating cavity 31, so that the heat pipe 33 can transfer heat to the periphery of the aerosol generating rod 1. Since the heat dissipation at the periphery of the aerosol generating rod 1 is relatively large, the heat conduction effect of the heat pipe 33 can increase the temperature at the periphery of the aerosol generating rod 1, so that the aerosol generating rod 1 is heated more evenly.

[0043] It should be noted that the thermal contact in the present application includes both direct contact and contact through other media that can transfer heat. For example, the heat pipe 33 and the resistive heating element 32 can also be in indirect contact through thermal grease, thermal pads, etc., which can also achieve heat transfer.

[0044] For example, in one embodiment, please refer to Figures 4 to 6 , the heat conducting pipe 33 surrounds the entire accommodating cavity 31. For another example, the airflow heating assembly 3 includes a first pipe seat 34 and a second pipe seat 35, and the heat conducting pipe 33 is clamped between the first pipe seat 34 and the second pipe seat 35, wherein the first pipe seat 34 surrounds a part of the accommodating cavity 31. The first pipe seat 34 and the second pipe seat 35 are installed in the housing 2. In order to reduce the heat loss of the heat conducting pipe 33, the first pipe seat 34 includes a seat body and a protective sleeve 341, and the protective sleeve 341 is sleeved on the periphery of the heat conducting pipe 33, and an annular spacer 36 is left between the protective sleeve 341 and the heat conducting pipe 33, and the annular spacer 36 can reduce the speed at which the heat conducting pipe 33 transfers heat to the outside. The second pipe seat 35 is inserted together with the protective sleeve 341.

[0045] In one embodiment, please refer to Figures 3 to 6The resistance heating element 32 is disposed in the heat pipe 33, and the resistance heating element 32 is in heat-conducting contact with the inner wall of the heat pipe 33. The resistance heating element 32 is disposed in the heat pipe 33 to facilitate the heat-conducting installation between the two. In some other embodiments, in addition to being disposed in the heat pipe 33, the resistance heating element 32 can also be disposed outside the heat pipe 33, for example, the resistance heating element 32 can be at one end of the heat pipe 33.

[0046] The resistance heating element 32 and the heat pipe 33 can be assembled in various feasible ways. For example, in one embodiment, please refer to Figures 2 to 4 The resistive heating element 32 includes a resistive heating element 322, a first lead 323, a second lead 324, and a peripheral conductive portion 325 located at the periphery of the resistive heating element 322. The peripheral conductive portion 325 extends along the periphery of the resistive heating element 322 and is in conductive contact with the resistive heating element 322. The heat exchange hole 321 is located on the resistive heating element 322. The first lead 323 is in conductive contact with the middle of the resistive heating element 322, and the second lead 324 is in conductive contact with the peripheral conductive portion 325. The peripheral conductive portion 325 is a closed loop, and is conductively connected to the peripheral conductive portion 325 through the second lead 324. At the same time, the first lead 323 is connected to the middle of the resistive heating element 322, so that the resistive heating element 322 can be heated evenly as a whole. For another example, in one embodiment, the first lead 323 and the second lead 324 can also be conductively connected to the periphery of the resistive heating element 322, and the connection position of the first lead 323 and the connection position of the second lead 324 are arranged relatively spaced.

[0047] For further information, please refer to Figures 4 to 6 In one embodiment, the peripheral conductive portion 325 is a conductive paste layer coated on the periphery of the resistive heating element 322. The conductive paste layer facilitates the molding of the peripheral conductive portion 325. In some other embodiments, the peripheral conductive portion 325 can also be a machined conductive ring, which is tightly clamped around the periphery of the resistive heating element 322.

[0048] In one embodiment, the resistance heating element 32 is in thermal contact with the heat pipe 33 through the conductive paste layer. It should be noted that when the heat pipe 33 is only used to transfer heat, it should be made of insulating material, such as insulating ceramic. In addition to insulating ceramic, any other feasible insulating thermal conductive material can also be used.

[0049] In order to facilitate the conductive connection between the second lead 324 and the peripheral conductive portion 325, in one embodiment, please refer to Figure 3 and Figure 4 The heat pipe 33 has a heat pipe wall hole for the second lead wire 324 to pass through. Specifically, in one embodiment, please refer to Figure 3 and Figure 4, the second lead 324 passes through the hole in the wall of the heat pipe and is connected to the peripheral conductive part 325. In another embodiment, the second lead 324 is outside the heat pipe 33, and a portion of the peripheral conductive part 325 extends out of the heat pipe 33 through the hole in the wall of the heat pipe and is connected to the second lead 324. In another embodiment, the second lead 324 and a portion of the peripheral conductive part 325 both pass through the hole in the wall of the heat pipe, so that the second lead 324 and the peripheral conductive part 325 can have more connection points and the connection is more reliable. Any feasible method can be used to connect the second lead 324 and the peripheral conductive part 325, such as crimping, welding, etc.

[0050] Specifically, in one embodiment, please refer to Figures 3 to 6 , the heat pipe 33 is a round pipe. The resistance heating element 322 is a cylinder, and the number of heat exchange holes 321 is multiple and arranged on the resistance heating element 322. The extension direction of the heat exchange holes 321 is consistent with the extension direction of the heat pipe 33. The first lead 323 is inserted into one of the heat exchange holes 321 and is in conductive contact with the resistance heating element 322.

[0051] In one embodiment, please refer to Figures 1 to 6 When the aerosol generating device is started, the resistance heating element 32 is connected to the power supply 4 and starts to generate heat. The temperature of the resistance heating element 32 rises. After the resistance heating element 32 heats up, part of the heat can be transferred to the heat conducting tube 33. The temperature of the heat conducting tube 33 rises, and the periphery of the aerosol generating rod 1 is heated. After the preheating is completed, the user draws on the nozzle of the aerosol generating rod 1, and the airflow enters the accommodating cavity 31 through the heat exchange hole 321, and then enters the aerosol generating rod 1 through the air inlet end 12. Since the airflow absorbs heat in the process of passing through the heat exchange hole 321, the hot airflow enters the aerosol generating rod 1 and can heat the aerosol generating matrix in the aerosol generating rod 1 to generate aerosol.

[0052] In one embodiment, in addition to using the heat pipe 33, a heating pipe can also be used instead of the heat pipe 33. The airflow heating assembly 3 includes a heating pipe, which can generate heat after being energized. The heating pipe surrounds at least a portion of the accommodating cavity 31 so that the heating pipe can heat the periphery of the aerosol generating rod 1. The heating pipe conductor heat pipe 33 can heat the periphery of the aerosol generating rod 1 more quickly.

[0053] Furthermore, in one embodiment, the heating tube is a resistance heating tube (not shown in the figure). The resistance heating element 32 is arranged in the heating tube, the first lead 323 is in conductive contact with the resistance heating element 32, and the second lead 324 is in conductive contact with the outer wall of the heating tube (not shown in the figure). The heating tube is in conductive contact with the resistance heating element 32 so that the heating tube and the resistance heating element 32 are connected in series. By making the resistance heating element 32 in conductive contact with the heating tube, it is convenient to connect the resistance heating element 32 to the power supply 4, and it can be achieved without drilling a hole in the heating tube. In some other embodiments, the resistance heating element 32 can also be outside the heating tube, such as at the end of the heating tube, or arranged at intervals from the heating tube along the axial direction of the heating tube.

[0054] In one embodiment, when the aerosol generating device is started, the resistance heating element 32 is connected to the power supply 4 and starts to generate heat, the temperature of the resistance heating element 32 increases, the resistance heating element 32 heats up, and the heating tube also heats up after power failure to heat the periphery of the aerosol generating rod 1. After the preheating is completed, the user draws on the nozzle of the aerosol generating rod 1, and the airflow enters the accommodating cavity 31 through the heat exchange hole 321, and then enters the aerosol generating rod 1 through the air inlet end 12. Since the airflow absorbs heat in the process of passing through the heat exchange hole 321, the hot airflow enters the aerosol generating rod 1 and can heat the aerosol generating matrix in the aerosol generating rod 1 to generate aerosol.

[0055] In an embodiment of an airflow heating component, the structure of the airflow heating component is the same as the structure of the airflow heating component described in any of the above embodiments, and will not be repeated herein.

[0056] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. An airflow heating assembly, characterized in that: The airflow heating component has a accommodating cavity for inserting an aerosol generating rod. The airflow heating component includes a resistive heating element, and the resistive heating element has a plurality of heat exchange holes. The resistive heating element is used to generate heat to heat the airflow passing through the heat exchange holes after being energized; the heat exchange holes are in communication with the accommodating cavity, and are used to heat the airflow flowing toward the accommodating cavity through the resistive heating element.

2. The airflow heating assembly according to claim 1, characterized in that: The airflow heating assembly comprises a heat-conducting pipe, which is in thermal contact with the resistive heating element; the heat-conducting pipe surrounds at least a part of the accommodating cavity so that the heat-conducting pipe can transfer heat to the periphery of the aerosol generating rod.

3. The airflow heating assembly according to claim 2, characterized in that: The resistance heating element is arranged in the heat-conducting pipe, and the resistance heating element is in heat-conducting contact with the inner wall of the heat-conducting pipe.

4. The airflow heating assembly according to claim 2, characterized in that: The resistive heating element includes a resistive heating element, a first lead, a second lead and a peripheral conductive portion located at the periphery of the resistive heating element, the peripheral conductive portion extends along the periphery of the resistive heating element and is in conductive contact with the resistive heating element, the heat exchange hole is located on the resistive heating element, the first lead is in conductive contact with the middle of the resistive heating element, and the second lead is in conductive contact with the peripheral conductive portion.

5. The airflow heating assembly according to claim 4, characterized in that: The peripheral conductive part is a conductive paste layer coated on the periphery of the resistor heating body.

6. The airflow heating assembly according to claim 4, characterized in that: The heat-conducting pipe has a heat-conducting pipe wall hole for the second lead wire and / or the peripheral conductive part to pass through.

7. The airflow heating assembly according to claim 1, characterized in that: The airflow heating component comprises a heating tube, which can generate heat after being energized; the heating tube surrounds at least a part of the accommodating cavity so that the heating tube can heat the periphery of the aerosol generating rod.

8. The airflow heating assembly according to claim 7, characterized in that: The heating tube is a resistance heating tube; the resistance heating element is arranged in the heating tube, the airflow heating assembly includes a first lead and a second lead, the first lead is in conductive contact with the resistance heating element, and the second lead is in conductive contact with the outer wall of the heating tube; the heating tube is in conductive contact with the resistance heating element, so that the heating tube and the resistance heating element are connected in series.

9. The airflow heating assembly according to any one of claims 1 to 8, characterized in that: The resistance heating element is a conductive ceramic element.

10. An aerosol generating device, characterized in that: It comprises a housing and an airflow heating component as described in any one of claims 1 to 9, wherein the airflow heating component is arranged in the housing.

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