CN111436663A - An aerosol generating device with a surrounding airflow - Google Patents

Abstract

The present invention provides an aerosol-generating device having a wraparound airflow, comprising: an upper housing, a collection portion and a heat generating component, wherein the upper housing has an inner wall and an outer wall, the inner wall defining a cavity for receiving the aerosol-forming substrate, the cavity is configured to be approximately elliptical cylindrical, the proximal end of the upper housing forming an elliptical opening to receive the aerosol-forming substrate, the bottom surface of the collecting portion is provided with at least one opening, the bottom surface of the collecting portion is further provided with a raised portion to support the aerosol-forming substrate, the heat generating component penetrates through the aperture into the interior of the aerosol-forming substrate contained within the cavity, a first air flow channel surrounding the aerosol-forming substrate is formed between the outer wrapper of the aerosol-forming substrate and the inner wall of the upper housing, a second air flow channel is formed inside the aerosol-forming substrate, and forming a third air flow passage communicating between the first air flow passage and the second air flow passage.

Description

An aerosol generating device with a surrounding airflow

technical field

The invention relates to an aerosol generating device for heating aerosol to form a substrate, in particular to an aerosol generating device with a surrounding airflow.

Background technique

At present, various handheld aerosol generating devices are disclosed in the prior art with heat generating components for aerosol-forming substrates. Typically, aerosol-generating devices require heating an aerosol-forming substrate placed therein to a temperature of several hundred degrees Celsius, thereby releasing volatile compounds that can form aerosols. Due to the very high heating temperature during smoking, the temperature of the upper housing part of the aerosol generating device is too high, and there is also a problem that the body of the aerosol-forming substrate product loses heat too quickly.

Chinese patent CN 104135881 B discloses an aerosol generating device and system with improved airflow. The aerosol generating device achieves the purpose of preventing the upper casing from being overheated and enabling consumers to obtain a comfortable holding experience by setting a specific air flow path. Specifically, the aerosol generating device has a first airflow channel extending from the air inlet to the distal end of the cavity, wherein the first airflow channel is on the inner surface of the upper housing along at least a portion of the longitudinal extension of the cavity and the outer surface, and extend from the distal end of the cavity to the second airflow channel of the proximal end of the cavity, and the distal end of the first airflow channel and the distal end of the second airflow channel are around the heating assembly. The air outlets provided on the bases of the elements meet at the air outlets.

The technical solution of the above patent can effectively solve the problem that the temperature of the upper casing of the handheld aerosol generating device is too high during smoking, but there is no solution to the problem of heat dissipation of the aerosol-forming substrate body.

SUMMARY OF THE INVENTION

In order to solve the defects in the prior art, the present invention provides an aerosol generating device with a surrounding airflow.

An aerosol generating device with a surrounding airflow of the present invention includes: an upper casing, a collecting part and a heating component, wherein the upper casing has an inner wall and an outer wall, and the inner wall defines a space for accommodating the aerosol forming a cavity for the substrate, the cavity is configured as an approximately elliptical cylinder, and an elliptical opening is formed at the proximal end of the upper shell to receive the aerosol-forming substrate,

The collecting part is arranged at the far end opposite to the proximal end in the upper casing, and is used for collecting soot or debris dropped when the exhausted aerosol forming substrate is replaced, and the bottom surface of the collecting part is arranged There is at least one opening, and the bottom surface of the collecting part is also provided with a convex part to support the aerosol-forming substrate accommodated in the cavity, so that a gap is formed under the end surface of the aerosol-forming substrate,

The heating element penetrates into the interior of the aerosol-forming substrate accommodated in the cavity through the opening,

A first airflow channel surrounding the aerosol-forming substrate is formed between the outer wrapping layer of the aerosol-forming substrate and the inner wall of the upper shell, and the airflow of the first airflow channel is from the vicinity of the upper shell. The end flows to the distal end; the inside of the aerosol-forming substrate forms a second airflow channel, the airflow of the second airflow channel flows from the distal end of the upper shell to the proximal end, and the aerosol-forming substrate is below the end surface The gap formed between the first and second airflow channels forms a third airflow channel, and the third airflow channel communicates with the first airflow channel and the second airflow channel.

Preferably, the shortest inner diameter of the elliptical column cavity is set to match the outer diameter of the aerosol-forming substrate, and the longest inner diameter of the elliptical column cavity is set to be larger than the outer diameter of the aerosol-forming substrate 0.5 to 5 mm long.

Preferably, the raised portion on the bottom surface of the collecting portion is formed as an annular raised portion centered on the opening.

Preferably, the annular convex portion is further provided with a plurality of grooves in the radial direction.

Preferably, the collecting part further has a side wall extending from the bottom surface, the bottom surface and the side wall are formed into a cylindrical shape with one end open, and the other end is detachably connected to the aerosol generating device.

Preferably, the side wall of the collecting part can be accommodated in a narrow space between the outer wall and the inner wall of the upper casing.

Preferably, the clamping force of the cavity to the aerosol-forming substrate is set to 0.5N-8N.

Preferably, the suction resistance jointly provided by the first airflow channel, the second airflow channel and the third airflow channel is 200-1000 Pa.

Preferably, the present invention further comprises a lower casing, and the distal end of the upper casing is detachably connected to the lower casing of the aerosol generating device.

The present invention has the following beneficial effects: the first airflow channel surrounding the aerosol-forming substrate is formed between the aerosol-forming substrate and the inner wall of the upper casing, which greatly reduces the outer wrapping layer of the aerosol-forming substrate and the outer shell of the upper casing. The contact area between the inner walls and the air in the first airflow channel can play the role of isolating heat conduction, thereby effectively reducing the heat transfer of the aerosol-forming substrate body to the upper shell of the sol-generating device, avoiding the formation of aerosols. The heat loss of the substrate body can reduce the temperature of the upper casing of the sol generating device, thereby bringing a comfortable holding experience to the user during use.

Description of drawings

FIG. 1 is a cross-sectional view of an aerosol generating device with a surrounding airflow according to an embodiment of the present invention.

FIG. 2 is a top view of an upper casing of an aerosol generating device with a surrounding airflow according to an embodiment of the present invention.

3 is a schematic diagram of a collection part of an aerosol generating device with a surrounding airflow according to an embodiment of the present invention, (a) is a top view, (b) is a side view, and (c) is a perspective view.

4 is a schematic diagram of a collection part of an aerosol generating device with a surrounding airflow according to another embodiment of the present invention,

(a) is a top view, (b) is a side view, and (c) is a perspective view.

FIG. 5 is a schematic diagram of the overall structure of an aerosol generating device with a surrounding airflow according to an embodiment of the present invention.

Detailed ways

Embodiments of the present invention will be described below with reference to the accompanying drawings. It should be noted that the embodiments involved in this specification are not exhaustive and do not represent the only embodiment of the present invention. The following corresponding examples are only for the purpose of clearly illustrating the inventive content of the patent of the present invention, and are not intended to limit the embodiments thereof. For those of ordinary skill in the art, changes and modifications in different forms can also be made on the basis of the description of these embodiments, and any obvious changes or modifications that belong to the technical idea and inventive content of the present invention are also included in the present invention. within the scope of protection.

An "aerosol-generating device" in the present invention relates to a device that interacts with an aerosol-forming substrate to generate an aerosol (smoke or aerosol). The aerosol-forming substrate may be part of an aerosol-generating article, such as a smoking article. The aerosol-generating device may include one or more components for supplying energy from an energy source to the aerosol-forming substrate to generate an aerosol that is inhaled directly into the user's mouth through the user's mouth. in the lungs.

An "aerosol-forming substrate" in the present invention is a substrate capable of releasing volatile compounds that can form an aerosol. Such volatile compounds can be released by heating the aerosol-forming substrate.

FIG. 1 is a cross-sectional view of an aerosol generating device with a surrounding airflow according to a first embodiment of the present invention. As shown in FIG. 1 , an aerosol generating device with a surrounding airflow of the present invention includes: an upper casing 1 , a collecting part 2 and a heating component 3 .

The upper casing 1 is generally substantially cylindrical, and one end is a portion close to the user's mouth. This portion is referred to herein as the "proximal end of the upper housing" or "proximal end", and the portion opposite the "proximal end" is referred to as the "distal end of the upper housing" or "distal end". The aerosol generating device further includes a lower casing 8 (see FIG. 5 ), and the distal end of the upper casing 1 is detachably connected to the lower casing 8 of the aerosol generating device. The upper casing 1 and the lower casing 8 together constitute the housing of the aerosol generating device. The upper case 1 has an inner wall 11 and an outer wall 12 . The inner wall 11 defines a cavity 13 for containing the aerosol-forming substrate 4 . The cavity 13 is between the proximal end and the distal end of the upper casing 1 and is formed into an approximately elliptical cylinder shape. The proximal end of the upper housing 1 forms an oval opening to receive the aerosol-forming substrate 4 .

The collecting part 2 is disposed at the distal end of the upper casing 1 opposite to the proximal end, and is used for collecting soot or debris dropped when the exhausted aerosol-forming substrate 4 is replaced. The bottom surface of the collecting part 2 is provided with at least one opening 21 . The bottom surface 22 of the collecting portion 2 is also provided with a raised portion 23 to support the aerosol-forming substrate 4 accommodated in the cavity 13 , so that a void (space) is formed under the end surface of the aerosol-forming substrate 4 . Thus, a third airflow channel connecting the first airflow channel and the second airflow channel can be formed under the end face of the aerosol-forming substrate 4 .

Here, when the exhausted aerosol-forming substrate 4 needs to be replaced, the smoking article is first directly pulled out from the cavity 13 of the aerosol-generating device, and then the upper casing 1 is removed from the lower casing of the aerosol-generating device. It is removed by rotating or pulling out, and then the collecting part 2 is removed from the aerosol generating device, so that the soot or debris remaining in the collecting part can be cleaned.

The heating element 3 penetrates into the interior of the aerosol-forming substrate 4 accommodated in the cavity 13 through the opening 21 . The heating assembly includes a base 31 and a heating needle 32 extending from the base. The heating needle 32 penetrates the opening 21 and enters the inside of the aerosol-forming substrate 4 to heat the aerosol-forming substrate 4 to form smoke.

When the user draws the aerosol-forming device, a first airflow channel surrounding the aerosol-forming substrate 4 is formed between the outer wrapping layer 41 of the aerosol-forming substrate 4 and the inner wall 11 of the upper casing 1 . The airflow of the airflow channel flows from the proximal end to the distal end of the upper casing 1 . A second airflow channel is formed inside the aerosol-forming substrate 4 , and the airflow of the second airflow channel flows from the distal end of the upper casing 1 to the proximal end. The gap 24 between the bottom surface of the collecting part 2 and the end surface 4 of the aerosol-forming substrate forms a third airflow channel, and the third airflow channel communicates with the first airflow channel and the second airflow channel. The suction resistance jointly provided by the first airflow channel, the second airflow channel and the third airflow channel is 200-1000Pa.

FIG. 2 is a top view of an upper casing of an aerosol generating device with a surrounding airflow according to an embodiment of the present invention. As shown in FIG. 2 , the shortest inner diameter of the elliptical column cavity 13 is set to match the outer diameter of the aerosol-forming substrate 4, so that the aerosol-forming substrate 4 can be put into the cavity 13 and just clamp the aerosol-forming substrate. 4 is better. Specifically, the clamping force of the cavity 13 to the aerosol-forming substrate 4 may be 0.5N-8N. The longest inner diameter of the elliptical column cavity 13 is set to be 0.5-5 mm longer than the outer diameter of the aerosol-forming substrate 4 . By arranging the cavity 13 of the specific shape, the aerosol-forming substrate 4 can be conveniently accommodated and fixed without additional clamping parts, and the outer wrapping layer and the upper casing of the aerosol-forming substrate 4 can be formed. A space is formed between the inner walls 11 of the 1 , and a first airflow channel surrounding the aerosol-forming substrate 4 is formed through the space. When the user sucks the aerosol-forming substrate in the aerosol-generating device, the airflow in the first airflow channel flows from the proximal end to the distal end, so that the air between the aerosol-forming substrate 4 and the inner wall 11 of the upper casing 1 flows from the proximal end to the distal end. An airflow around the aerosol-forming substrate 4 is formed between.

3 is a schematic diagram of a collection part of an aerosol generating device with a surrounding airflow according to an embodiment of the present invention, (a) is a top view, (b) is a side view, and (c) is a perspective view. 4 is a schematic diagram of a collection part of an aerosol generating device with a surrounding airflow according to another embodiment of the present invention, (a) is a top view, (b) is a side view, and (c) is a perspective view. As shown in FIGS. 3 to 4 , in a preferred embodiment, the annular raised portion 23 is formed as an annular step with the opening 21 as the center. The height of the annular step 23 may be 1 mm˜3 mm. The annular step 23 is also formed with a plurality of grooves 24 in the radial direction, so as to make it easier for the air flow of the first air flow channel to enter the second air flow channel. Preferably, there may be two grooves or three grooves. In other embodiments, the protruding portion 23 can also be configured as a plurality of bumps or a plurality of strip-shaped protrusions, etc., so as to support the end face of the aerosol-forming substrate 4, so that the end face of the aerosol-forming substrate 4 and the collection It is preferable to form a gap between the bottom surfaces of the parts 2, that is, a third airflow channel.

The collecting part 2 also has a side wall 25 extending vertically from the bottom surface 22 , is configured in a cylindrical shape with one end open, and is detachably connected to the aerosol generating device at the other end. The connection method can be a snap connection, a screw connection or a magnetic connection. The side wall 25 is also provided with a longitudinal ventilation port 26 . The side wall 25 of the collecting part 2 can be accommodated in a narrow space between the outer wall 12 and the inner wall 11 of the upper casing 1 (see FIG. 1 ).

FIG. 5 is a schematic diagram of the overall structure of an aerosol generating device with a surrounding airflow according to an embodiment of the present invention. Elements irrelevant to the understanding of the present invention have been omitted here to simplify FIG. 5 . As shown in FIG. 5 , the aerosol generating device includes the aforementioned upper casing 1 , a collecting part 2 , a heating component 3 , a controller 5 , a user interface 6 , a power source 7 and a lower casing 8 . The cavity (collecting part 2 ) of the upper casing 1 accommodates the aerosol-forming substrate 4 , so that the aerosol-forming substrate 4 is heated by the heating element 3 . Aerosol-forming substrate 4 releases a range of volatile compounds at different temperatures. The casing formed by the upper casing 1 and the lower casing 8 also includes a power source 7, such as a rechargeable lithium-ion battery. The controller 5 is respectively connected with the heating element 3 , the button part 6 and the power source 7 . The controller 5 controls the energy supplied to the heating element 3 to adjust the heating temperature, typically heating the aerosol-forming substrate to a temperature between 250 and 450 degrees Celsius.

Based on the above structure of the present invention, by forming an airflow around the aerosol-forming substrate between the outer wrapping layer and the inner wall of the aerosol-forming substrate, the gap between the outer wrapping layer of the aerosol-forming substrate and the inner wall of the upper shell is greatly reduced. The contact area and the air in the first airflow channel can play the role of isolating heat conduction. The incoming air removes excess heat before it reaches the upper shell, thereby effectively reducing the heat of the aerosol-forming substrate body to the aerosol. The transmission between the upper shell and the outer shell of the device can reduce the temperature of the shell of the aerosol generating device while avoiding the heat loss of the aerosol-forming substrate body, thereby bringing a comfortable holding experience to the user during use.

Obviously, those skilled in the art should realize that the above embodiments are only used to illustrate the present invention, not to limit the present invention. Variations and modifications of the examples will fall within the scope of the claims of the present invention.

Claims (9)

1. An aerosol-generating device having a wraparound airflow, the aerosol-generating device comprising: an upper shell, a collecting part and a heating component, wherein

The upper housing having an inner wall and an outer wall, the inner wall defining a cavity for receiving the aerosol-forming substrate, the cavity being configured in an approximately elliptical cylinder, the proximal end of the upper housing forming an elliptical opening to receive the aerosol-forming substrate,

the collecting part is arranged at the far end of the upper shell opposite to the near end and used for collecting smoke residue or debris falling when the exhausted aerosol forming base material is replaced, the bottom surface of the collecting part is provided with at least one opening, the bottom surface of the collecting part is also provided with a bulge part for supporting the aerosol forming base material contained in the cavity to form a gap below the end surface of the aerosol forming base material,

the heat generating component penetrates through the aperture into the interior of the aerosol-forming substrate contained within the cavity,

a first air flow channel surrounding the aerosol-forming substrate is formed between the outer wrap of the aerosol-forming substrate and the inner wall of the upper housing, the air flow of the first air flow channel flowing from the proximal end to the distal end of the upper housing; the interior of the aerosol-forming substrate forms a second airflow channel, the airflow of which flows from the distal end to the proximal end of the upper housing; the void below the end face of the aerosol-forming substrate forms a third airflow channel that communicates the first airflow channel and the second airflow channel.

2. An aerosol-generating device according to claim 1, wherein the shortest inner diameter of the elliptical cylinder cavity is arranged to match the outer diameter of the aerosol-forming substrate and the longest inner diameter of the elliptical cylinder cavity is arranged to be 0.5-5 mm longer than the outer diameter of the aerosol-forming substrate.

3. An aerosol-generating device according to claim 1, wherein the projection of the collecting portion base surface is formed as an annular projection centred on the aperture.

4. An aerosol-generating device according to claim 3, wherein the annular protrusion is further provided with a plurality of grooves in a radial direction.

5. An aerosol-generating device according to claim 1, wherein the collecting portion further comprises a side wall extending from a bottom surface, the bottom surface and the side wall being configured as a cylinder open at one end and being detachably connected to the aerosol-generating device at the other end.

6. An aerosol-generating device according to claim 4, wherein the side walls of the collecting portion are receivable in a narrow gap between the outer and inner walls of the upper housing.

7. An aerosol-generating device according to claim 1, wherein the clamping force of the cavity against the aerosol-forming substrate is set to 0.5N-8N.

8. An aerosol-generating device according to claim 1 in which the first, second and third air flow channels together provide a resistance to draw of 200 and 1000 Pa.

9. An aerosol-generating device according to claim 1, further comprising a lower housing, the distal end of the upper housing being removably connected to the lower housing of the aerosol-generating device.

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