TECHNICAL FIELD
[0001] The present invention relates to the field of heating devices, specifically to a
heating non-combustion device and its electronic cigarette.
TECHNICAL BACKGROUND
[0002] Existing heating non-combustion devices have significant heat transfer loss from
the heating element (especially circumferential heating type heating elements) to
the outside, resulting in the problem of the heating device's casing being hot to
the touch, as well as low battery efficiency.
[0003] Currently, the industry uses aerogel for thermal insulation, but it can only partially
alleviate the problem of the casing being hot to the touch. When two or more cigarette
sticks are consecutively smoked, the casing of the heating device still becomes hot,
and the battery efficiency utilization rate is low.
SUMMARY
[0004] According to a first aspect, in one embodiment, a heating non-combustion device is
provided, including a cigarette stick, an outer pipe, and a heating element.
[0005] The cigarette stick is at least partially located within the heating element, the
heating element is located within the outer pipe, and there is a first gap between
the heating element and the outer pipe.
[0006] The inner wall of the outer pipe is provided with a thermal insulation layer, and
there is or is not a gap between the thermal insulation layer and the inner wall of
the outer pipe.
[0007] In one embodiment, the thermal insulation layer is an aluminum reflective layer.
[0008] In one embodiment, the thermal insulation layer is a hollow glass microsphere layer.
[0009] In one embodiment, the thermal insulation layer includes a first thermal insulation
layer and a second thermal insulation layer.
[0010] In one embodiment, the first thermal insulation layer and the second thermal insulation
layer are sequentially stacked on the inner wall of the outer pipe.
[0011] In one embodiment, the first thermal insulation layer is an aluminum reflective layer,
and the second thermal insulation layer is a hollow glass microsphere layer.
[0012] In one embodiment, a plurality of pillars is provided between the outer pipe and
the thermal insulation layer, and there is a second gap between pillars.
[0013] In one embodiment, the first thermal insulation layer is an aluminum reflective layer,
and the second thermal insulation layer is an upconversion material coating.
[0014] In one embodiment, the first thermal insulation layer is an aluminum-coated glass
film, an aluminum-coated resin film, or an aluminum-coated polyimide film, and the
second thermal insulation layer is an upconversion material coating. One side of the
glass film, resin film, or polyimide film is coated with aluminum, and the other side
is provided with the upconversion material coating.
[0015] In one embodiment, the first thermal insulation layer is an aluminum reflective layer,
and the second thermal insulation layer is a polyether ether ketone film layer, and
there is or is not a gap between the first thermal insulation layer and the second
thermal insulation layer.
[0016] In one embodiment, the first thermal insulation layer is an aluminum reflective layer,
and the second thermal insulation layer is a stainless steel film layer, and there
is or is not a gap between the first thermal insulation layer and the second thermal
insulation layer.
[0017] In one embodiment, the thermal insulation layer is an aluminum tube, and there is
or is not a gap between the aluminum tube and the inner wall of the outer pipe.
[0018] According to a second aspect, in one embodiment, an electronic cigarette is provided,
including the heating non-combustion device according to any one of the first aspect.
[0019] Based on the above embodiments of the heating non-combustion device and its electronic
cigarette, the present invention significantly improves the thermal insulation effect
by setting a thermal insulation layer, effectively preventing the casing from being
hot to the touch.
BRIEF DESCRIPTION OF DRAWINGS
[0020]
FIG. 1 is a schematic structural diagram of a heating non-combustion device in one
embodiment;
FIG. 2 is an exploded structural diagram of a heating non-combustion device in one
embodiment;
FIG. 3 is an A-A sectional view of FIG. 1 in one embodiment;
FIG. 4 is an A-A sectional view of FIG. 1 in another embodiment;
FIG. 5 is an A-A sectional view of FIG. 1 in another embodiment;
FIG. 6 is an enlarged view of part B of FIG. 4;
FIG. 7 is an enlarged view of part C of FIG. 5;
FIG. 8 is a front view of a heating non-combustion device in one embodiment;
FIG. 9 is a D-D sectional view of FIG. 8.
[0021] Reference numerals: 1, cigarette stick; 2, outer pipe; 3, first gap; 4, heating element;
5, thermal insulation layer; 51, first thermal insulation layer; 52, second thermal
insulation layer; 6, pillar; 7, second gap.
DETAILED DESCRIPTION OF EMBODIMENTS
[0022] The present application will be further described in detail below in conjunction
with specific embodiments and accompanying drawings. In the following embodiments,
many details are described to enable a better understanding of the present application.
However, those skilled in the art can easily recognize that some features can be omitted
or replaced by other materials or methods in different situations. In certain cases,
some operations related to the present application are not shown or described in the
specification to avoid overwhelming the core part of the present application with
excessive descriptions. For those skilled in the art, it is not necessary to describe
these related operations in detail, as they can fully understand the related operations
based on the description in the specification and general technical knowledge in the
field.
[0023] Furthermore, the features, operations, or characteristics described in the specification
can be combined in any suitable manner to form various embodiments. Also, the steps
or actions in the method description can be reordered or adjusted in a manner that
is apparent to those skilled in the art. Therefore, the various sequences in the specification
and drawings are only for clearly describing a particular embodiment and do not imply
that the sequence is necessary unless otherwise specified.
[0024] The numbering of components in this document, such as "first," "second," etc., is
only used to distinguish the described objects and does not have any sequential or
technical meaning.
[0025] In one embodiment, the present invention achieves the transfer of thermal radiation
from a lower temperature area to a higher temperature area by setting a thermal insulation
layer, thereby reducing the heat transfer loss from the heating element (especially
the circumferential heating type heating element) to the outside.
[0026] In one embodiment, one specific implementation method is as follows: by using specific
reflective materials (including metal foils or coatings) and setting an appropriately
sized (not too small) air gap layer distance (the energy transfer from the heating
tube to the outside is mainly through air conduction and thermal radiation; however,
when the gap distance exceeds the free path of air, e.g., the average free path of
air is about 0.183 microns at 300°C, and the heat flux transfer is inversely proportional
to the air gap layer distance). This method reverses the propagation path of part
of the heat radiated outward by the heating tube to a certain extent.
[0027] When using metal foil as a reflective material, the foil additionally provides a
heat equalizing effect, which can improve the temperature uniformity of the outer
layer parts (including the outer wall of the PEEK tube, the outer casing of the whole
machine, etc.); when using a coating reflective material, especially a vacuum glass
bead reflective material, the vacuum glass beads (with a high vacuum or semi-vacuum
state inside the glass beads) provide an additional thermal insulation effect.
[0028] In one embodiment, another specific implementation method is as follows: by setting
an infrared upconversion material around the periphery of the heating element, the
infrared wavelength emitted by the heating element is converted into shorter wavelength
near-infrared light or even visible light scattered photons. Since the energy of the
incident photons is lower than the energy of the emitted scattered photons, a fluorescence
cooling effect occurs. Moreover, the incident direction of the scattered photon light
waves converted is independent of the original infrared light incident direction,
and about half of the scattered photons are directed towards the heating element,
achieving a reversal of the original transmission direction. The other half of the
scattered photons and the unabsorbed incident photons still reverse the transmission
direction by setting a mirror aluminum reflective layer on the outside of the upconversion
material as described in the first implementation method.
[0029] In one embodiment, the type of heating tube is not limited and can 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.
[0030] According to the first aspect, in one embodiment, as shown in FIG. 1, FIG. 2, FIG.
3, FIG. 8, and FIG. 9, a heating non-combustion device is provided, including a cigarette
stick 1, an outer pipe 2, and a heating element 4.
[0031] The cigarette stick 1 is at least partially located within the heating element 4,
the heating element 4 is located within the outer pipe 2, and there is a first gap
3 between the heating element 4 and the outer pipe 2.
[0032] The inner wall of the outer pipe 2 is provided with a thermal insulation layer 5.
The thermal insulation layer 5 serves the purpose of thermal insulation, preventing
the outer wall of the outer pipe 2 from overheating. There is or is not a gap between
the thermal insulation layer 5 and the inner wall of the outer pipe 2, preferably
with a gap, which can further provide good thermal insulation.
[0033] In one embodiment, the thermal insulation layer 5 can be an aluminum reflective layer.
[0034] In one embodiment, the thermal insulation layer 5 can be a hollow glass microsphere
layer.
[0035] The material of the thermal insulation layer 5 is an existing material, specifically,
it can be aluminum foil, hollow glass microspheres, and other reflective materials,
serving the purpose of thermal insulation.
[0036] In one embodiment, there is a gap between the thermal insulation layer 5 and the
heating element 4, which further provides thermal insulation.
[0037] In one embodiment, as shown in FIG. 4 and FIG. 6, the thermal insulation layer 5
includes a first thermal insulation layer 51 and a second thermal insulation layer
52.
[0038] In one embodiment, as shown in FIG. 4 and FIG. 6, the first thermal insulation layer
51 and the second thermal insulation layer 52 are sequentially stacked on the inner
wall of the outer pipe 2.
[0039] In one embodiment, the first thermal insulation layer 51 is an aluminum reflective
layer, and the second thermal insulation layer 52 is a hollow glass microsphere layer.
[0040] In one embodiment, as shown in FIG. 5 and FIG. 7, a plurality of pillars 6 (two or
more) are provided between the outer pipe 2 and the thermal insulation layer 5, and
a second gap 7 is provided between pillars 6, which further provides thermal insulation.
The material of the pillars 6 is the same as that of the outer pipe 2. The pillars
6 and the outer pipe 2 can be of an integrated structure.
[0041] In one embodiment, the first thermal insulation layer 51 is an aluminum reflective
layer, and the second thermal insulation layer 52 is an upconversion material coating.
[0042] 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 upconversion material coating. One
side of the glass film, resin film, or polyimide film is coated with aluminum, and
the other side is provided with the infrared upconversion material coating.
[0043] In one embodiment, as shown in FIG. 4 and FIG. 6, the first thermal insulation layer
51 is an aluminum reflective layer, and the second thermal insulation layer 52 is
a polyether ether ketone film layer. There is or is not a gap between the first thermal
insulation layer 51 and the second thermal insulation layer 52, which can be continuous
or discontinuous. In one embodiment, wrinkles can be set on the surface of the polyether
ether ketone film layer that is at least partially connected to the aluminum reflective
layer, so that there is a partial air gap between the polyether ether ketone film
layer and the aluminum reflective layer, further providing thermal insulation.
[0044] In one embodiment, as shown in FIG. 4 and FIG. 6, the first thermal insulation layer
51 is a polyether ether ketone film layer, and the second thermal insulation layer
52 is an aluminum reflective layer. There is or is not a gap between the first thermal
insulation layer 51 and the second thermal insulation layer 52, which can be continuous
or discontinuous.
[0045] In one embodiment, as shown in FIG. 4 and FIG. 6, the first thermal insulation layer
51 is an aluminum reflective layer, and the second thermal insulation layer 52 is
a stainless steel film layer. There is or is not a gap between the first thermal insulation
layer 51 and the second thermal insulation layer 52, which can be continuous or discontinuous.
[0046] In one embodiment, as shown in FIG. 4 and FIG. 6, the first thermal insulation layer
51 is a stainless steel film layer, and the second thermal insulation layer 52 is
an aluminum reflective layer. There is or is not a gap between the first thermal insulation
layer 51 and the second thermal insulation layer 52, which can be continuous or discontinuous.
[0047] In one embodiment, the thermal insulation layer 5 is a layered composite material
of aluminum foil and stainless steel film.
[0048] In one embodiment, 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 pipe
2, preferably with a gap.
[0049] In one embodiment, the outer pipe 2 can be made of polyether ether ketone or polyimide.
The material of the outer pipe 2 is an existing material.
[0050] According to the second aspect, in one embodiment, an electronic cigarette is provided,
including the heating non-combustion device according to any one of the first aspect.
Embodiment 1
[0051] As shown in FIG. 1, in this embodiment, the outer pipe is a PEEK (polyether ether
ketone, abbreviated as PEEK) tube, and the inner wall of the PEEK tube is lined with
high-reflectivity aluminum foil (with a purity not less than 99.6%) for thermal insulation.
[0052] The thickness of the aluminum foil is 5~200 microns, in this embodiment, it is 20
microns, with a reflectivity of ≤95%. The aluminum foil does not use an organic adhesive
layer, and there will be partial contact with the PEEK inner wall, but there will
still be a large part with a slight gap or air layer. The aluminum foil is fixed by
its own tension and constraint at one or both ends. The thickness of the air gap layer
between the aluminum foil and the heating element is 1~5 microns, in this embodiment,
it is 2.5 microns.
[0053] In this embodiment, the aluminum foil is used for thermal insulation on the inner
wall of the PEEK tube. Compared with the control group (including the blank control
group), the power consumption and the highest temperature of the PEEK outer wall during
an unloaded heating cycle (4 minutes) are shown in Table 1. During the test, the PEEK
tube outer wall was exposed to room temperature air and was not installed in the whole
machine casing.
Table 1
Group Number |
Combination of Thermal Insulation Measures |
Power Consumption/mWh |
Highest Temperature of PEEK Outer Wall/°C |
Description |
1 |
Aluminum foil thermal insulation on PEEK tube inner wall |
321.7 |
88 |
This embodiment |
2 |
Air insulation inside PEEK tube |
374.5 |
130 |
Blank control group |
3 |
Aluminum foil on PEEK tube inner wall + aerogel blanket inside aluminum foil |
361 |
94 |
Control group |
4 |
Aerogel blanket inside PEEK tube + aluminum foil inside aerogel blanket |
374.5 |
96 |
Control group |
5 |
Aerogel blanket insulation inside PEEK tube |
344.7 |
120 |
Control group |
6 |
Glass microsphere insulation inside PEEK tube |
360~375 |
120 |
Control group |
[0054] It can be seen that compared to the blank control group, applying a layer of aluminum
foil on the inner wall of the PEEK tube for thermal insulation has the best effect
in reducing power consumption (decrease of 14.1% = 1-321.7/374.5) and reducing the
temperature of the PEEK outer wall (decrease of 42°C = 130°C-88°C).
[0055] Furthermore, the PEEK tube was installed in the machine, and the highest temperature
of the whole machine casing (artificial leather wrapped aluminum casing) was measured,
as shown in Table 2.
Table 2
Whole Machine Casing Temperature (°C) |
Whole Machine Casing Temperature (°C) |
One puff |
39.5-42.0 |
Two consecutive puffs |
44.0-47.0 |
Three consecutive puffs |
47.0-49.5 |
Embodiment 2.
[0056] The inner wall of the PEEK tube is provided with a hollow glass microsphere reflective
coating flexible material, and the thickness of the air gap layer between the aluminum
foil and the heating element is 1~5 microns, preferably 2~2.5 microns.
[0057] The size of the hollow glass microspheres is 150~500 mesh (23~106 microns), in this
embodiment, 300 mesh (48 microns) is selected.
[0058] The thickness of the aluminum reflective coating layer is 1~20 microns, in this embodiment,
it is 6~10 microns.
[0059] This embodiment can also set pillars on the substrate of the hollow glass microsphere
reflective coating flexible material, forming an air gap layer between the pillars,
so that when the hollow glass microsphere reflective coating flexible material is
set on the inner wall of the PEEK tube, even if the material is in partial contact
with the PEEK tube inner wall, there will be a stable distribution of air gap layers
for thermal insulation (the thermal conductivity of air is much lower than that of
the substrate).
Embodiment 3.
[0060] The inner wall of the PEEK tube is provided with aluminum foil coated with an infrared
upconversion material coating (with a purity not less than 99.6%) or an ultra-thin
aluminum-coated flexible transparent glass film/flexible transparent high-temperature
resistant (250 degrees Celsius or above) resin film (the infrared upconversion material
coating is applied on the side of the transparent substrate that is not aluminum-coated)
for thermal insulation.
[0061] The upconversion material coating functions as a fluorescent refrigerant functional
material, exhibiting a certain degree of fluorescence cooling effect under the excitation
of infrared light from the heating element. The chemical composition is a rare earth-doped
fluoride material (YF3:ErYb) or a rare earth-doped sulfide material, with a grain
size of 10~100 nm, capable of converting infrared light into shorter wavelength near-infrared
light or visible light. The upconversion material can be purchased from the market.
[0062] The upconversion material coating is combined with the aluminum foil, glass film,
or resin film to form a thermal insulation layer, and multiple pillars can be set
between the thermal insulation layer and the inner wall of the outer pipe, with gaps
between pillars, further providing thermal insulation.
Embodiment 4.
[0063] Based on Embodiment 1, the aluminum foil is replaced with a layered composite material
of aluminum foil (i.e., aluminum film layer, also known as aluminum reflective layer)
and PEEK film (PEEK film thickness is 5~20 microns, preferably a model with a thermal
expansion coefficient close to that of aluminum, such as inorganic fiber-reinforced
PEEK film), and the inner wall of the PEEK film is wrinkled, forming a more uniformly
distributed bubble distribution between the PEEK film and the aluminum foil, i.e.,
introducing an air gap bubble between the PEEK film layer and the aluminum film layer,
which helps with thermal insulation.
[0064] Refer to FIG. 4 and FIG. 6, the first thermal insulation layer 51 is a PEEK film,
and the second thermal insulation layer 52 is aluminum foil. Alternatively, the first
thermal insulation layer 51 is aluminum foil, and the second thermal insulation layer
52 is a PEEK film.
[0065] Alternatively, based on Embodiment 1, the aluminum foil is replaced with a layered
composite material of aluminum foil and a stainless steel film with poor thermal conductivity
(thickness 5~20 microns, SUS430 or SUS304 or SUS316, etc.). Refer to FIG. 4 and FIG.
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.
[0066] Alternatively, based on Embodiment 1, the aluminum foil is replaced with an aluminum
tube (thickness 20~300 microns). In this scheme, the aluminum tube has relatively
good rigidity, allowing for a stable distance (1~5 microns) between the aluminum tube
and the heating element, and also allowing for a stable distance (about 1~2 millimeters)
between the aluminum tube and the inner wall of the PEEK tube, which helps to demonstrate
the thermal insulation effect of the air layer.
[0067] In one embodiment, two methods using reflective materials (metal reflective aluminum
foil, hollow glass microsphere reflective coating material) and upconversion materials
(fluorescent refrigerant coating) achieve the transfer of thermal radiation from a
lower temperature area to a higher temperature area.
[0068] In one embodiment, an air gap layer is set, achieving a good thermal insulation effect.
[0069] The above specific examples are used to illustrate the present invention and are
only for helping to understand the present invention, and are not intended to limit
the present invention. For those skilled in the technical field of the present invention,
based on the idea of the present invention, several simple deductions, deformations,
or replacements can be made.
1. A heating non-combustion device, comprising a cigarette stick (1), an outer pipe (2),
and a heating element (4),
wherein the cigarette stick (1) is at least partially located within the heating element
(4), the heating element (4) is located within the outer pipe (2), and there is a
first gap (3) between the heating element (4) and the outer pipe (2); and
wherein an inner wall of the outer pipe (2) is provided with a thermal insulation
layer (5), and there is a gap or no gap between the thermal insulation layer (5) and
the inner wall of the outer pipe (2).
2. The heating non-combustion device according to claim 1, wherein the thermal insulation
layer (5) is an aluminum reflective layer.
3. The heating non-combustion device according to claim 1, wherein the thermal insulation
layer (5) is a hollow glass microsphere layer.
4. The heating non-combustion device according to claim 1, wherein the thermal insulation
layer (5) comprises a first thermal insulation layer (51) and a second thermal insulation
layer (52).
5. The heating non-combustion device according to claim 4, wherein the first thermal
insulation layer (51) and the second thermal insulation layer (52) are sequentially
stacked on the inner wall of the outer pipe (2).
6. The heating non-combustion device according to claim 5, wherein the first thermal
insulation layer (51) is an aluminum reflective layer, and the second thermal insulation
layer (52) is a hollow glass microsphere layer.
7. The heating non-combustion device according to claim 6, wherein a plurality of pillars
(6) are provided between the outer pipe (2) and the thermal insulation layer (5),
and a second gap (7) is present between pillars (6).
8. The heating non-combustion device according to claim 5, wherein the first thermal
insulation layer (51) is an aluminum reflective layer, and the second thermal insulation
layer (52) is an upconversion material coating.
9. The heating non-combustion device according to claim 8, wherein the first thermal
insulation layer (51) is an aluminum-coated glass film, an aluminum-coated resin film,
or an aluminum-coated polyimide film, the second thermal insulation layer (52) is
an upconversion material coating, and one side of the glass film, resin film, or polyimide
film is coated with aluminum, and the other side is provided with the upconversion
material coating.
10. The heating non-combustion device according to claim 4, wherein the first thermal
insulation layer (51) is an aluminum reflective layer, the second thermal insulation
layer (52) is a polyether ether ketone film layer, and there is a gap or no gap between
the first thermal insulation layer (51) and the second thermal insulation layer (52).
11. The heating non-combustion device according to claim 4, wherein 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 a gap or no gap between the
first thermal insulation layer (51) and the second thermal insulation layer (52).
12. The heating non-combustion device according to claim 1, wherein the thermal insulation
layer (5) is an aluminum tube, and there is a gap or no gap between the aluminum tube
and the inner wall of the outer pipe (2).
13. An electronic cigarette, comprising the heating non-combustion device according to
any one of claims 1 to 12.