WO2024082357A1

WO2024082357A1 - Heat-not-burn device and electronic cigarette having same

Info

Publication number: WO2024082357A1
Application number: PCT/CN2022/130801
Authority: WO
Inventors: 鄢文超; 杨扬彬; 刘才学
Original assignee: 深圳市基克纳科技有限公司
Priority date: 2022-10-21
Filing date: 2022-11-09
Publication date: 2024-04-25
Also published as: CN218354610U

Abstract

A heat-not-burn device and an electronic cigarette having same. The heat-not-burn device comprises a cigarette (1), an outer tube (2), and a heating tube (4); the cigarette (1) is at least partially located in the heating tube (4), the heating tube (4) is located in the outer tube (2), and a first gap (3) is formed between the heating tube (4) and the outer tube (2); and a heat insulation layer (5) is provided on the inner wall of the outer tube (2), and a gap is formed between the heat insulation layer (5) and the inner wall of the outer tube (2) or no gap is provided between the heat insulation layer (5) and the inner wall of the outer tube (2). By providing the heat insulation layer (5), the heat insulation effect is significantly improved, and housing scalding is effectively avoided.

Description

A heat-not-burn device and electronic cigarette thereof

Technical Field

The utility model relates to the field of heating devices, in particular to a heat-not-burn device and an electronic cigarette thereof.

Background technique

In the existing heat-not-burning devices, the heat transfer loss of the heating element (especially the circumferential heating element) to the outside is relatively large, the shell of the heating device is hot to the touch, and the battery energy efficiency is relatively low.

Currently, the industry uses aerogel for heat insulation, but it can only alleviate the problem of the outer shell being hot to a certain extent. When smoking two or more cigarettes in a row, the outer shell of the heating device is still hot, and the battery energy efficiency utilization rate is low.

Utility Model Content

According to the first aspect, in one embodiment, a heat-not-burn device is provided, comprising a cigarette, an outer tube, and a heating tube;

The cigarette is at least partially located in the heating tube, the heating tube is located in the outer tube, and a first gap is formed between the heating tube and the outer tube;

The inner wall of the outer tube is provided with a heat insulation layer, and there may or may not be a gap between the heat insulation layer and the inner wall of the outer tube.

In one embodiment, the heat insulation layer is an aluminum reflective layer.

In one embodiment, the heat insulation layer is a hollow glass bead layer.

In one embodiment, the thermal insulation layer includes a first thermal insulation layer and a second thermal insulation layer.

In one embodiment, the first heat insulation layer and the second heat insulation layer are sequentially stacked on the inner wall of the outer tube.

In one embodiment, the first heat insulation layer is an aluminum reflective layer, and the second heat insulation layer is a hollow glass bead layer.

In one embodiment, a plurality of pillars are provided between the outer tube and the heat insulation layer, and a second gap is provided between each pillar.

In one embodiment, the first heat insulation layer is an aluminum reflective layer, and the second heat insulation layer is an up-conversion material coating.

In one embodiment, the first thermal insulation layer is an aluminum-plated glass film, an aluminum-plated resin film or an aluminum-plated polyimide film, and the second thermal insulation layer is an up-conversion material coating, wherein one side of the glass film, resin film or polyimide film is plated with aluminum, and the other side is provided with the up-conversion material coating.

In one embodiment, the first thermal insulation layer is an aluminum reflective layer, the second thermal insulation layer is a polyetheretherketone film layer, and there may or may not be a gap between the first thermal insulation layer and the second thermal insulation layer.

In one embodiment, the first heat insulation layer is an aluminum reflective layer, the second heat insulation layer is a stainless steel film layer, and there may or may not be a gap between the first heat insulation layer and the second heat insulation layer.

In one embodiment, the heat insulation layer is an aluminum tube, and there may or may not be a gap between the aluminum tube and the inner wall of the outer tube.

According to the second aspect, in one embodiment, an electronic cigarette is provided, comprising the heat-not-burn device described in any one of the first aspect.

According to the heat-not-burn device and the electronic cigarette thereof of the above-mentioned embodiment, the utility model significantly improves the heat insulation effect by providing a heat insulation layer, and effectively prevents the shell from being scalded.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a heating without burning device in one embodiment;

FIG2 is a schematic diagram of an explosion structure of a heat-without-combustion device according to an embodiment;

Fig. 3 is a cross-sectional view taken along line A-A of Fig. 1 in one embodiment;

Fig. 4 is a cross-sectional view taken along line A-A of Fig. 1 according to another embodiment;

Fig. 5 is a cross-sectional view taken along line A-A of Fig. 1 according to another embodiment;

FIG6 is an enlarged view of portion B of FIG4 ;

FIG7 is an enlarged view of portion C of FIG5 ;

FIG8 is a front view of a heating without burning device according to an embodiment;

FIG9 is a cross-sectional view taken along line D-D in FIG8 .

Explanation of reference numerals: 1. cigarette; 2. outer tube; 3. first gap; 4. heating tube; 5. thermal insulation layer; 51. first thermal insulation layer; 52. second thermal insulation layer; 6. support; 7. second gap.

Detailed ways

The utility model is further described in detail below by specific embodiments in conjunction with the accompanying drawings. 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 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 according to the description in the specification and the general technical knowledge in the art.

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.

The serial numbers assigned to the components in this article, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning.

In one embodiment, the utility model can achieve the transfer of heat radiation from low-temperature areas to high-temperature areas by setting up a heat insulation layer (in the absence of external human intervention, heat is usually transferred from a higher-temperature object to a lower-temperature object), thereby reducing the heat transfer loss to the outside of the heating element (especially a circumferentially radiant heating element).

In one embodiment, one of the specific implementation approaches is as follows: by using specific reflective materials (including metal foils or coatings) and setting an air gap layer distance of appropriate size (not too small) (the heat pipe transfers energy to the outside mainly through air heat transfer and heat radiation, but the gap distance exceeds the air free path. The average free path of air at 300°C is about 0.183 microns, and the transferred heat flux is inversely proportional to the air gap layer distance), the propagation path of part of the heat radiated outward by the heat pipe is reversed to a certain extent.

When using metal foil reflective material, the foil will have an additional heat-averaging effect, which can improve the temperature uniformity of the outer layer (including the outer wall of the PEEK tube, the entire machine casing, etc.); when using coated reflective materials, especially vacuum glass beads reflective materials, the vacuum glass beads (the glass beads are in a high vacuum state or semi-vacuum state) will have an additional heat-insulating effect.

In one embodiment, the second specific implementation method is as follows: by setting an infrared up-conversion material on the periphery of the heating element, the infrared wavelength transmitted by the heating element is converted into near-infrared light with a relatively short wavelength or even visible light scattered photons, because the energy of the incident photons is lower than the energy of the released scattered photons, a fluorescent cooling effect occurs. In addition, the incident direction of the converted scattered photon light wave has nothing to do with the original incident direction of the infrared light, and about half of the scattered photons are directed toward the heating element, achieving a reversal of the original transmission direction. The other half of the scattered photons and the incident photons that are not absorbed are still reversed through one of the above-mentioned implementation methods, that is, setting a mirror aluminum reflection layer on the outside of the up-conversion material to reverse the transmission direction.

In one embodiment, the type of the heating tube is not limited, and may be an ordinary metal tube, such as a thick film heating element based on a metal substrate, or a thick film heating element based on a ceramic substrate, etc.

According to the first aspect, in one embodiment, as shown in FIG. 1 , FIG. 2 , FIG. 3 , FIG. 8 , and FIG. 9 , a heat-not-burn device is provided, comprising a cigarette 1 , an outer tube 2 , and a heating tube 4 ;

The cigarette 1 is at least partially located in the heating tube 4, the heating tube 4 is located in the outer tube 2, and a first gap 3 is formed between the heating tube 4 and the outer tube 2;

The inner wall of the outer tube 2 is provided with a heat insulation layer 5. The heat insulation layer 5 plays a heat insulation role to prevent the outer wall of the outer tube 2 from overheating. There may or may not be a gap between the heat insulation layer 5 and the inner wall of the outer tube 2, preferably there is a gap, which can further play a good heat insulation role.

In one embodiment, the heat insulation layer 5 may be an aluminum reflective layer.

In one embodiment, the heat insulation layer 5 may be a hollow glass bead layer.

The material of the heat insulation layer 5 is an existing material, specifically, it can be a reflective material such as aluminum foil, hollow glass beads, etc., which plays a heat insulation role.

In one embodiment, there is a gap between the heat insulation layer 5 and the heating tube 4, and the gap further plays a role of heat insulation.

In one embodiment, as shown in FIG. 4 and FIG. 6 , the heat insulation layer 5 includes a first heat insulation layer 51 and a second heat insulation layer 52 .

In one embodiment, as shown in FIG. 4 and FIG. 6 , the first heat insulation layer 51 and the second heat insulation layer 52 are sequentially stacked on the inner wall of the outer tube 2 .

In one embodiment, the first heat insulation layer 51 is an aluminum reflective layer, and the second heat insulation layer 52 is a hollow glass bead layer 51 .

In one embodiment, as shown in FIG. 5 and FIG. 7 , a plurality of (two or more) pillars 6 are provided between the outer tube 2 and the heat insulation layer 5 , and a second gap 7 is provided between each pillar 6 , and the second gap further plays a role of heat insulation. The material of the pillar 6 is the same as that of the outer tube 2. The pillar 6 and the outer tube 2 may be an integrated structure.

In one embodiment, the first heat insulation layer 51 is an aluminum reflective layer, and the second heat insulation layer 52 is an up-conversion material coating.

In one embodiment, the first thermal insulation layer 51 is an aluminum-coated glass film, an aluminum-coated resin film or an aluminum-coated polyimide film, and the second thermal insulation layer 52 is an infrared up-conversion material coating, wherein one side of the glass film, resin film or polyimide film is coated with aluminum, and the other side is provided with an infrared up-conversion material coating.

In one embodiment, as shown in FIG. 4 and FIG. 6 , the first heat insulation layer 51 is an aluminum reflective layer, the second heat insulation layer 52 is a polyetheretherketone film layer, and there may or may not be a gap between the first heat insulation layer 51 and the second heat insulation layer 52. The gap may be continuous or discontinuous. In one embodiment, wrinkles may be provided on the surface of the polyetheretherketone film layer at least partially connected to the aluminum reflective layer, so that there is a partial air gap between the polyetheretherketone film layer and the aluminum reflective layer, which further plays a heat insulation role.

In one embodiment, as shown in Figures 4 and 6, the first thermal insulation layer 51 is a polyetheretherketone film layer, the second thermal insulation layer 52 is an aluminum reflective layer, and there may or may not be a gap between the first thermal insulation layer 51 and the second thermal insulation layer 52, and the gap may be continuous or discontinuous.

In one embodiment, as shown in FIG. 4 and FIG. 6 , the first thermal insulation layer 51 is an aluminum reflective layer, the second thermal insulation layer 52 is a stainless steel film layer, and there may or may not be a gap between the first thermal insulation layer 51 and the second thermal insulation layer 52 , and the gap may be continuous or discontinuous.

In one embodiment, as shown in FIG. 4 and FIG. 6 , the first thermal insulation layer 51 is a stainless steel film layer, the second thermal insulation layer 52 is an aluminum reflective layer, and there may or may not be a gap between the first thermal insulation layer 51 and the second thermal insulation layer 52 , and the gap may be continuous or discontinuous.

In one embodiment, the heat insulation layer 5 is a layered composite material of aluminum foil and stainless steel film.

In one embodiment, the heat insulation layer 5 is an aluminum tube, and there may or may not be a gap between the aluminum tube and the inner wall of the outer tube 2, preferably there is a gap.

In one embodiment, the outer tube 2 may be polyetheretherketone or polyimide. The material of the outer tube 2 is an existing material.

According to the second aspect, in one embodiment, an electronic cigarette comprises the heat-not-burn device of any one of the first aspect.

Example 1

As shown in FIG. 1 , in this embodiment, the outer tube is a PEEK (polyetheretherketone, English name polyetheretherketone, referred to as PEEK) tube, and the inner wall of the PEEK tube is affixed with high reflectivity aluminum foil (purity should be not less than 99.6%) for heat insulation.

The thickness of the aluminum foil is 5 to 200 microns, and in this embodiment it is 20 microns, and the reflectivity is ≤95%. The aluminum foil does not use a glue organic layer, and it will partially contact the inner wall of the PEEK, but there are still slight gaps or air layers in most parts. The aluminum foil is fixed by its own tension and the limit constraints at both ends or one end. The thickness of the air gap layer between the aluminum foil and the heating element is 1 to 5 microns, and in this embodiment it is 2.5 microns.

In this embodiment, aluminum foil is attached to the inner wall of the PEEK tube for heat insulation, and the power consumption of no-load heating and the maximum temperature of the PEEK outer wall in one heating cycle (4 minutes) of the control group (including the blank control group) are shown in Table 1. During the test, the outer wall of the PEEK tube was exposed to room temperature air and was not installed in the housing of the whole machine.

Table 1

It can be seen that compared with the blank control group, pasting a layer of aluminum foil on the inner wall of the PEEK tube for insulation has the best effect of reducing power consumption (reduced by 14.1% = 1-321.7/374.5) and reducing the temperature of the PEEK outer wall (reduced by 42°C = 130°C-88°C).

Furthermore, the PEEK tube was installed in the machine and the maximum temperature of the whole machine shell (aluminum shell wrapped in artificial leather) was measured. The results are shown in Table 2.

Table 2

连续加热次数Continuous heating times	整机外壳温度(℃)Machine casing temperature (℃)
抽吸1次 Suction 1 time	39.5-42.039.5-42.0
连抽2次2 consecutive draws	44.0-47.044.0-47.0
连抽3次3 consecutive draws	47.0-49.547.0-49.5

Example 2

A hollow glass microbead reflective coating flexible material is arranged on the inner wall of the PEEK tube, and the thickness of the air gap layer between the aluminum foil and the heating element is 1 to 5 microns, preferably 2 to 2.5 microns.

The size of the hollow glass microspheres is 150-500 mesh (23-106 microns), and 300 mesh (48 microns) is selected in this embodiment.

The thickness of the aluminum reflective coating layer is 1 to 20 microns, and in this embodiment is 6 to 10 microns.

In this embodiment, pillars can also be arranged on the substrate of the hollow glass microbead reflective coating flexible material. The air interlayer formed between the pillars makes it possible for when the hollow glass microbead reflective coating flexible material is arranged on the inner wall of the PEEK tube, even if the material is partially in contact with the inner wall of the PEEK tube, there will be a stably distributed air interlayer for heat insulation (the heat transfer coefficient of air is much smaller than that of the substrate).

Example 3

The inner wall of the PEEK tube is provided with aluminum foil coated with infrared up-conversion material (purity should be not less than 99.6%) or ultra-thin aluminum-coated flexible transparent glass film/flexible transparent high-temperature resistant (250 degrees Celsius or above) resin film coated with infrared up-conversion material (the infrared up-conversion material coating is coated on the non-aluminum-coated side of the transparent substrate) for heat insulation.

As a fluorescent refrigerant functional material, the upconversion material coating has a certain degree of fluorescent cooling effect under the excitation of infrared light from the heating body. The chemical composition is a rare earth doped fluoride material (YF3: ErYb) or a rare earth doped sulfide material, with a grain size of 10 to 100 nm, which can convert infrared light into near-infrared light or visible light with a shorter wavelength. Upconversion materials can be purchased from the market.

The up-conversion material coating is compounded with aluminum foil or glass film or resin film to form a heat-insulating layer. A plurality of pillars can be arranged between the heat-insulating layer and the inner wall of the outer tube, and gaps are provided between the pillars to further play a heat-insulating role.

Example 4

Based on Example 1, the aluminum foil is replaced by a layered composite material of aluminum foil (i.e., aluminum film layer, also called aluminum reflective layer) and PEEK film (PEEK film thickness is 5 to 20 microns, preferably with an expansion coefficient close to that of aluminum, such as inorganic fiber reinforced PEEK film), and the inner wall of the PEEK film is wrinkled, so that a more evenly distributed bubble distribution is formed between the PEEK film and the aluminum foil, that is, air gap bubbling is introduced between the PEEK film layer and the aluminum film layer, which helps to insulate.

4 and 6 , the first heat insulation layer 51 is a PEEK film, and the second heat insulation layer 52 is an aluminum foil. Alternatively, the first heat insulation layer 51 is an aluminum foil, and the second heat insulation layer 52 is a PEEK film.

Alternatively, based on Example 1, the aluminum foil is replaced with a layered composite material of aluminum foil and a stainless steel film (thickness 5 to 20 microns, SUS430 or SUS304 or SUS316, etc.) with poor thermal conductivity. Referring to Figures 4 and 6, the first thermal insulation layer 51 is aluminum foil, and the second thermal insulation layer 52 is a stainless steel film. Alternatively, the first thermal insulation layer 51 is a stainless steel film, and the second thermal insulation layer 52 is aluminum foil.

Alternatively, based on Example 1, the aluminum foil is replaced with an aluminum tube (thickness 20-300 microns). In this solution, the aluminum tube has relatively good rigidity, which can ensure a stable distance (1-5 microns) between the aluminum tube and the heating element, and can also ensure a stable distance (about 1-2 mm) between the aluminum tube and the inner wall of the PEEK tube, which helps to reflect the heat insulation effect of the air layer.

In one embodiment, two methods, namely, reflective material (metal reflective aluminum foil, hollow glass microbead reflective coating material) and up-conversion material (fluorescent refrigerant coating), are used to transfer heat radiation from a low temperature area to a high temperature area.

In one embodiment, an air gap layer is provided to achieve a better heat insulation effect.

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

A heat-not-burn device, characterized in that it comprises a cigarette (1), an outer tube (2), and a heating tube (4);

The cigarette (1) is at least partially located in the heating tube (4), the heating tube (4) is located in the outer tube (2), and a first gap (3) is provided between the heating tube (4) and the outer tube (2);

The inner wall of the outer tube (2) is provided with a heat insulation layer (5), and there may or may not be a gap between the heat insulation layer (5) and the inner wall of the outer tube (2).
The heating without burning device according to claim 1 is characterized in that the thermal insulation layer (5) is an aluminum reflective layer.
The heat-without-combustion device according to claim 1, characterized in that the thermal insulation layer (5) is a hollow glass bead layer.
The heating without burning device according to claim 1 is characterized in that the thermal insulation layer (5) comprises a first thermal insulation layer (51) and a second thermal insulation layer (52).
The heating without burning device according to claim 4 is characterized in that the first thermal insulation layer (51) and the second thermal insulation layer (52) are sequentially stacked on the inner wall of the outer tube (2).
The heating without burning device according to claim 5 is characterized in that the first heat insulation layer (51) is an aluminum reflective layer, and the second heat insulation layer (52) is a hollow glass bead layer (51).
The heating without burning device according to claim 6 is characterized in that a plurality of pillars (6) are provided between the outer tube (2) and the heat insulation layer (5), and a second gap (7) is provided between each pillar (6).
The heating without burning device according to claim 5 is characterized in that the first thermal insulation layer (51) is an aluminum reflective layer, and the second thermal insulation layer (52) is an up-conversion material coating.
The heating without burning device as described in claim 8 is characterized in that the first thermal insulation layer (51) is an aluminum-plated glass film, an aluminum-plated resin film or an aluminum-plated polyimide film, and the second thermal insulation layer (52) is an up-conversion material coating, one side of the glass film, resin film or polyimide film is plated with aluminum, and the other side is provided with the up-conversion material coating.
The heating without burning device according to claim 4 is characterized in that the first thermal insulation layer (51) is an aluminum reflective layer, the second thermal insulation layer (52) is a polyetheretherketone film layer, and there is or is not a gap between the first thermal insulation layer (51) and the second thermal insulation layer (52).
The heating without burning device as described in claim 4 is characterized in that the first thermal insulation layer (51) is an aluminum reflective layer, the second thermal insulation layer (52) is a stainless steel film layer, and there is or is not a gap between the first thermal insulation layer (51) and the second thermal insulation layer (52).
The heating without burning device according to claim 1 is characterized in that the thermal insulation layer (5) is an aluminum tube, and there is or is not a gap between the aluminum tube and the inner wall of the outer tube (2).
An electronic cigarette, characterized by comprising the heat-not-burn device according to any one of claims 1 to 12.