Note: Descriptions are shown in the official language in which they were submitted.
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HEAT GENERATING BODY AND PREPARATION METHOD
THEREFOR, ATOMIZER, AND ELECTRONIC DEVICE
TECHNICAL FIELD
This application relates to the field of atomizer technologies, and in
particular, to a heating
body and a preparation method thereof, an atomizer, and an electronic device.
BACKGROUND
An electronic atomizer mainly includes an atomizer and a battery. The atomizer
is an
important component of the electronic atomizer, which is configured to atomize
an atomization
medium for inhalation. In the atomizer, a heating body is a core component of
the atomizer that
performs an atomization function, which is mainly formed by pre-embedding a
heating wire or
screen printing a heating film on a ceramic substrate. The heating body in
which the heating
wire is pre-embedded has advantages such as a simple structure, high
atomization efficiency,
and a uniform temperature field. The heating body on which the heating film is
screen printed
has advantages such as a large heating area, being capable of implementing
surface atomization,
and high thermal efficiency.
However, when atomizing the atomization medium, the two types of heating
bodies are
prone to problems such as slow formation of an aerosol, and generation of a
burnt flavor,
miscellaneous air, or the like due to dry heating of the heating body,
affecting a user experience.
SUMMARY
Various exemplary embodiments of this application provide a heating body and a
preparation method thereof, an atomizer, and an electronic device.
A heating body includes:
a porous ceramic body including a preheating member configured to preheat
liquid, where
the preheating member is a porous infrared ceramic structure; and
a heating member located on the porous ceramic body and is configured to
provide heat
for the preheating member and atomize preheated liquid.
In the heating body, the porous infrared ceramic structure is used as the
preheating member.
The preheating member radiates far infrared rays to preheat liquid by using
heat provided by
the heating member, thereby reducing viscosity of the liquid and improving
fluidity of the
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liquid in the porous ceramic body. In this way, the liquid to be atomized may
reach the heating
member more quickly and be atomized, thereby improving a problem that when an
atomization
medium is atomized, an aerosol is prone to slow formation. In addition,
because the fluidity of
the liquid to be atomized in the porous ceramic body is improved, the liquid
to be atomized
may reach the heating member more quickly, and a problem that the heating body
is prone to
dry heating is also improved.
In an embodiment, the porous ceramic body further includes a substrate, the
preheating
member is located on the substrate, the substrate is a porous ceramic
structure, and the heating
member is completely located in the preheating member and is adjacent to the
substrate or is
located at a junction of the substrate and the preheating member.
In an embodiment, the substrate is a hollow porous ceramic structure, the
preheating
member is a hollow porous infrared ceramic structure, and the substrate and
the preheating
member are nested with each other.
In an embodiment, the preheating member is sleeved on the substrate, and the
heating
member is spirally distributed on the substrate.
In an embodiment, the heating member includes a heating portion and an
infrared heating
layer located on the heating portion.
In an embodiment, a thickness of the infrared heating layer ranges from 20 gm
to 500 gm.
In an embodiment, the substrate is in a shape of a hollow cylinder, the
preheating member
is in a shape of a hollow cylinder, the preheating member is sleeved on the
substrate, an inner
diameter of the substrate ranges from 5 mm to 3 mm, and an outer diameter of
the preheating
member ranges from 2.5 mm to 9 mm.
In an embodiment, a surface of the substrate adjacent to the preheating member
recesses
to form a first groove, a surface of the preheating member adjacent to the
substrate recesses to
form a second groove corresponding to the first groove, the first groove and
the second groove
form a heating cavity, and the heating member is accommodated in the heating
cavity.
In an embodiment, a porosity of the preheating member ranges from 30% to 80%.
In an embodiment, a median pore size of the preheating member ranges from 10
gm to 100
gm. In an embodiment, a radiation wavelength of the preheating member ranges
from 5 gm to
20 gm.
In an embodiment, a preheating temperature of the preheating member ranges
from 40 C
to 90 C. In an embodiment, a resistance value of the heating member ranges
from 0.5 S2 to 5
SI
In an embodiment, a porosity of the substrate ranges from 30% to 80%.
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In an embodiment, a median pore size of the substrate ranges from 10 gm to 100
gm.
A method for preparing the heating body includes:
integrally forming, according to a preset shape, the heating member and a raw
material
configured to prepare the porous ceramic body to prepare a green body; and
sintering the green body after degumming to prepare the heating body.
An atomizer includes:
a liquid storage cavity, configured to store liquid; and
a heating body, configured to absorb liquid in the liquid storage cavity and
atomize the
liquid, where the heating body is the foregoing heating body.
An electronic device is provided, including a power supply and the atomizer,
where the
power supply is electrically connected to the atomizer to supply power to the
atomizer.
BRIEF DESCRIPTION OF THE DRAWINGS
To describe the technical solutions in the embodiments of this application
more clearly, the
following briefly introduces the accompanying drawings required for describing
the
embodiments or the related art. Apparently, the accompanying drawings in the
following
description show only some embodiments of this application, and a person of
ordinary skill in
the art may still derive other accompanying drawings from these accompanying
drawings
without creative efforts.
FIG. 1 is a schematic structural diagram of a heating body according to an
embodiment.
FIG. 2 is an exploded view of the heating body shown in FIG. 1.
FIG. 3 is a cross-sectional view of the heating body shown in FIG. 1.
FIG. 4 is a flowchart of a method for preparing a heating body according to an
embodiment.
DETAILED DESCRIPTION
For ease of understanding this application, this application is described more
comprehensively below. This application may be implemented in many different
forms, and is
not limited to embodiments described in this specification. On the contrary,
the embodiments
are provided to make the disclosed content of this application clearer and
more comprehensive.
It should be noted that, when a component is expressed as "being fixed to"
another
component, the component may be directly on another component, or one or more
intermediate
components may exist between the component and another component. When one
component
is expressed as "being connected to" another component, the component may be
directly
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connected to another component, or one or more intermediate components may
exist between
the component and another component. Orientation or position relationships
indicated by terms
such as "vertical", "horizontal", "left", "right", "upper", "lower", "inner",
"outer", and "bottom"
are based on orientation or position relationships shown in the accompanying
drawings, and
are used only for ease of description, rather than indicating or implying that
the mentioned
apparatus or component needs to have a particular orientation or needs to be
constructed and
operated in a particular orientation. Therefore, such terms should not be
construed as a
limitation to this application. In addition, terms "first" and "second" are
only used to describe
the objective and cannot be understood as indicating or implying relative
importance.
Unless otherwise defined, meanings of all technical and scientific terms used
in this
specification are the same as those usually understood by a person skilled in
the art to which
this application belongs. In this application, terms used in the specification
of this application
are merely intended to describe objectives of specific embodiments, but are
not intended to
limit this application.
An embodiment of this application provides an atomizer. The atomizer includes
a liquid
storage cavity and a heating body 10. The liquid storage cavity is configured
to store liquid,
such as an atomization medium. The heating body 10 is configured to absorb the
liquid in the
liquid storage cavity and atomize the liquid. In some embodiments, the liquid
storage cavity
has a liquid outlet, and the heating body 10 is adjacent to the liquid outlet.
The liquid in the
liquid storage cavity flows out from the liquid outlet and enters the heating
body 10, so as to
be atomized. In a specific example, the atomizer is an electronic atomizer.
Referring to FIG. 1 to FIG. 3, the heating body 10 includes a porous ceramic
body 110 and
a heating member 120 located on the porous ceramic body 110. The porous
ceramic body 110
includes a substrate 111 and a preheating member 112 located on the substrate
111. Specifically,
the porous ceramic body 110 has a liquid inlet surface 113. The liquid in the
liquid storage
cavity flows out through the liquid outlet and enters the porous ceramic body
110 from the
liquid inlet surface 113.
In some embodiments, the substrate 111 is of a porous ceramic structure and
has a liquid
guiding function. In some other embodiments, the substrate 111 is of a hollow
porous ceramic
structure. In the embodiment shown in the figure, the substrate 111 is in a
shape of a hollow
cylinder. Certainly, in another embodiment, a shape of the substrate 111 is
not limited to the
hollow cylinder, and may further be another hollow structure.
In this embodiment, a porosity of the substrate 111 ranges from 30% to 80%,
and a median
pore size of a pore of the substrate 111 ranges from 10 gm to 100 gm. The
porosity of the
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substrate 111 and a pore size of the pore are set as described above, which is
convenient for the
substrate 111 to absorb the liquid. In some embodiments, the porosity of the
substrate 111 is
30%, 40%, 50%, 60%, 70%, or 80%. The median pore size of the pore of the
substrate 111 is
gm, 20 gm, 30 gm, 40 gm, 50 gm, 60 gm, 70 gm, 80 gm, 90 gm, or 100 gm. In some
other
5 embodiments, a porosity of the substrate 111 ranges from 40% to 70%, and
a median pore size
of a pore of the substrate 111 ranges from 10 gm to 80 gm. It may be
understood that, in other
embodiments, the porosity of the substrate 111 and the pore size of the pore
are not limited to
the above, and may be adjusted according to actual needs.
The preheating member 112 is adjacent to the liquid outlet and is located on
the substrate
10 111. The preheating member 112 is of a porous infrared ceramic structure
and has a function
of guiding liquid and radiating infrared rays. The preheating member 112 has a
liquid inlet
surface 113, and the liquid enters the preheating member 112 through the
liquid inlet surface
113 of the preheating member 112 after flowing out from the liquid storage
cavity. When
flowing through the preheating member 112, the liquid is preheated by the
infrared rays
radiated by the preheating member 112, so that viscosity is reduced and
fluidity is improved.
In this way, when the heating body 10 atomizes the atomization medium, it is
not easy to cause
slow formation of an aerosol and dry heating due to the poor fluidity of the
atomization medium
in the porous ceramic body 110.
In some embodiments, both the preheating member 112 and the substrate 111 are
of hollow
structures, and the preheating member 112 is sleeved on the substrate 111.
When the preheating
member 112 is sleeved on the substrate 111, an outer circumferential surface
of the preheating
member 112 is the liquid inlet surface 113. The liquid flows out from the
liquid storage cavity,
enters the preheating member 112 through the outer circumferential surface of
the preheating
member 112, and is atomized into an aerosol after being preheated by the
preheating member
112 and is heated by the heating member 120, and is discharged from an inner
circumferential
surface of the substrate 111. It may be understood that, the preheating member
112 may also
be nested in the substrate 111. That is, the substrate 111 is sleeved on the
preheating member
112. In this case, the preheating member 112 is accommodated in a hollow
portion of the
substrate 111, an inner circumferential surface of the preheating member 112
is the liquid inlet
surface 113. The liquid flows out from the liquid storage cavity, enters the
preheating member
112 through the inner circumferential surface of the preheating member 112,
and is atomized
into an aerosol after being preheated by the preheating member 112 and is
heated by the heating
member 120, and is discharged from the outer circumferential surface of the
substrate 111.
In the illustrated embodiment, the preheating member 112 is in a shape of a
hollow cylinder.
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In a specific example, the substrate 111 is in a shape of a hollow cylinder,
and the preheating
member 112 is in a shape of a hollow cylinder. The preheating member 112 is
sleeved on the
substrate 111. An inner diameter of the substrate 111 ranges from 1.5 mm to 3
mm, and an outer
diameter of the preheating member ranges from 2.5 mm to 9 mm. It may be
understood that, a
size of the substrate 111 is not limited to the above, and a size of the
preheating member 112 is
not limited to the above, and may further be adjusted according to an actual
situation, provided
that the shape and size of the preheating member 112 may match that of the
substrate 111 and
the liquid outlet.
In some embodiments, at least one of the substrate 111 or the preheating
member 112 may
.. be a non-hollow structure. When the substrate 111 is the non-hollow
structure, the preheating
member 112 is the hollow structure. In this case, the preheating member 112 is
located on one
side of a surface of the substrate 111, and the liquid to be atomized is
atomized after being
preheated by the preheating member 112, and is then discharged from the other
side of the
substrate 111. When the substrate 111 is a hollow structure, the preheating
member 112 may
be the non-hollow structure. In this case, the preheating member 112 may be
located on the
substrate 111 in a stacking manner.
In this embodiment, a porosity of the preheating member 112 ranges from 30% to
80%,
and a median pore size of a pore of the preheating member 112 ranges from 10
gm to 100 gm.
The porosity of the preheating member 112 and a pore size of the pore are set
as described
.. above, which is convenient for the substrate 111 to absorb the liquid. In
some embodiments,
the porosity of the preheating member 112 is 30%, 40%, 50%, 60%, 70%, or 80%.
The median
pore size of the pore of the preheating member 112 is 10 gm, 20 gm, 30 gm, 40
gm, 50 gm, 60
gm, 70 gm, 80 gm, 90 gm, or 100 gm. In some other embodiments, a porosity of
the preheating
member 112 ranges from 40% to 70%, and a median pore size of a pore of the
preheating
member 112 ranges from 20 gm to 80 gm. It may be understood that, in other
implementations,
the porosity of the preheating member 112 and the pore size of the pore are
not limited to the
above, and may be adjusted according to actual needs.
When far infrared rays irradiate on a heated object, a part of the rays are
reflected, and a
part of the rays are absorbed by the object. When an emitted far infrared
wavelength is
consistent with an absorption wavelength of the heated object, the heated
object absorbs the far
infrared rays. In this case, molecules and atoms in the object "resonate",
i.e., producing strong
vibrations and rotations, and the vibrations and rotations increase a
temperature of the object,
achieving the objective of heating the object. Therefore, a wavelength
radiated from the
preheating member 112 may be selected according to a heated substance. In this
embodiment,
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the heated substance is an oil atomization medium, and a radiation wavelength
of the preheating
member 112 ranges from 5 gm to 20 gm. By setting the radiation wavelength of
the preheating
member 112 to range from 5 gm to 20 gm, effective ingredients (such as
essence, glycerin,
nicotine, or the like) in the oil atomization medium may be heated precisely,
thereby
implementing precise atomization, and increasing an effective atomization
concentration of the
effective ingredients. Certainly, the radiation wavelength of the preheating
member 112 is not
limited to the above, and may further be other radiation wavelengths, as long
as the radiation
wavelength of the preheating member 112 may match the absorption wavelength of
the heated
object.
In an embodiment, the preheating member 112 is of a porous infrared ceramic
structure at
a room temperature. The room temperature ranges from 25 C to 150 C. In this
implementation,
a preheating temperature of the preheating member 112 ranges from 40 C to 90
C.
The preheating temperature refers to a temperature that the liquid preheated
by the
preheating member 112 may reach. The temperature is suitable for preheating an
oil
atomization medium of an electronic atomizer. Certainly, when the atomized
liquid is not the
oil atomization medium but other liquid, the preheating temperature of the
preheating member
112 may be adjusted according to liquid that specifically needs to be
atomized.
The heating member 120 is configured to provide heat for the preheating member
112 and
atomize preheated liquid. A part of heat released by the heating member 120
directly heats the
liquid to cause the liquid to be atomized, and the other part is conducted to
the preheating
member 112 to cause the preheating member 112 to absorb the heat and radiate
infrared rays.
In some embodiments, the heating member 120 is located in the porous ceramic
body 110
and is configured to generate heat. In the illustrated embodiment, the heating
member 120 is
located at a junction between the substrate 111 and the preheating member 112.
The heating
member 120 is arranged at the junction between the substrate 111 and the
preheating member
112, so that the heat generated by the heating member 120 is fully used, and
preheating and
atomization are simultaneously satisfied. Specifically, a surface of the
substrate 111 adjacent
to the preheating member 112 is recessed to form a first groove 114, a surface
of the preheating
member 112 adjacent to the substrate 111 is recessed to form a second groove
115
corresponding to the first groove 114. The first groove 114 and the second
groove 115 form a
heating cavity, and the heating member 120 is accommodated in the heating
cavity.
In other embodiments, the heating member 120 may be completely embedded in the
preheating member 112, and may also be completely embedded in the substrate
111. For
example, the heating member 120 is completely located in the preheating member
112 and is
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away from the liquid outlet; or the heating member 120 is completely located
in the substrate
111 and is adjacent to the preheating member 112.
In the illustrated embodiment, the heating member 120 is spirally distributed
on the
substrate 111. Certainly, in some other embodiments, the shape of the heating
member 120 is
not limited to a shape of a spiral, and may further be another shape. For
example, the heating
member 120 is in a shape of at least one of a sheet, a strip, an S-shaped, or
a U-shaped.
In an embodiment, the heating member 120 includes a heating portion 121.
Optionally, the
heating portion 121 is the heating wire. Optionally, in a specific example,
the heating portion
121 is a piece of heating wire (that is, monofilament). In this
implementation, a resistance value
of the heating portion 121 ranges from 0.5 S2 to 1.5 S. In another embodiment,
a resistance
value of the heating portion 121 ranges from 0.8 S2 to 1.3 S.
In some embodiments, the heating member 120 further includes an infrared
heating layer
(not shown) on the heating portion 121. The infrared heating layer is arranged
on the heating
portion 121, so as to increase the heat utilization of the heating portion
121. In this way, the
preheating member 112 receives more heat that are more uniform, and preheating
is faster. In
this embodiment, a thickness of the infrared heating layer ranges from 20 gm
to 500 gm. In
another embodiment, a thickness of the infrared heating layer ranges from 20
gm to 80 gm.
In some embodiments, the substrate 111 may be omitted. When the substrate 111
is omitted,
the heating member 120 may be located in the preheating member 112 and be away
from the
liquid outlet, so that the liquid is first preheated and then atomized. In
this case, the heating
member 120 transfers heat energy to the preheating member 112 and enables the
preheating
member 112 to radiate heat energy to preheat the liquid. The preheated liquid
flows through
the heating member 120 and is atomized, thereby discharging the aerosol.
Certainly, when the
substrate 111 is omitted, the heating member 120 may also be located on an
outer surface of
the preheating member 112, as long as the heating member 120 can provide heat
for the
preheating member 112 to preheat the atomization medium and atomize the
atomization
medium. In an embodiment, the preheating member 112 is a non-hollow structure.
A side of
the preheating member 112 is adjacent to the liquid outlet, and the heating
member 120 is
located on a surface of the preheating member 112 and is away from a side of
the liquid outlet.
In this case, the liquid flowing out from the liquid outlet enters the
preheating member 112 at
a position adjacent to the liquid outlet, is first preheated by the preheating
member 112, and is
then atomized by the heating member 120 on the surface of the preheating
member 112, and is
discharged. In another embodiment, the preheating member 112 is of a hollow
structure, and
the heating member 120 is located on the outer circumferential surface of the
preheating
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member 112. In this case, after flowing out from the liquid outlet, the liquid
enters the
preheating member 112 through the inner circumferential surface of the
preheating member
112, and is first preheated by the preheating member 112 and is then heated by
the heating
member, thereby discharging the aerosol from the outer circumferential surface
of the
preheating member 112.
In some embodiments, the heating member 120 may further be located on the
surface of
the porous ceramic body 110. For example, when the substrate 111 is omitted,
the heating
member 120 is located on the outer surface of the preheating member 112.
Certainly, the heating body 10 further includes a connecting member 130. The
connecting
member 130 is configured to electrically connect the heating member 120 to a
power supply.
In the illustrated embodiment, the connecting member 130 passes through the
outer
circumferential surface of the preheating member 112.
The heating body 10 includes a porous ceramic body 110 and a heating member
120
located on the porous ceramic body 110, which at least has the following
advantages:
(1) A part of heat provided by the heating member 120 may cause the preheating
member
112 to be heated and radiate infrared rays, thereby preheating the atomization
medium. In this
way, viscosity of the atomization medium after entering the porous ceramic
body 110 is reduced,
the fluidity is increased, and the atomization medium may flow to the vicinity
of the heating
body 10 more quickly, and be heated and atomized by the heating member 120
more quickly.
Therefore, through cooperation between the preheating member 112 and the
heating member
120, the heating body 10 causes the atomization medium to guide liquid
smoothly in the porous
ceramic body 110, and problems such as slow formation of the aerosol and dry
heating of the
heating body 10 are not prone to occur, which improves a user experience. It
is verified that,
the heating body 10 has a particularly obvious effect on improving the
atomization medium
with relatively high viscosity.
(2) Due to the selectivity of a radiation wavelength of infrared heating, the
heating body
10 may be designed for the effective components in the atomization medium, so
as to
implement precise atomization and increase an effective atomization
concentration. In addition,
because infrared rays of a specific wavelength resonate with the effective
components of the
atomization medium, the atomization medium is heated, which has a higher
thermal efficiency
than heating with a heating wire separately, and may significantly reduce
energy consumption.
(3) Due to heating uniformity of infrared heating, problems such as an
excessively high
local temperature caused by uneven heating circuits and a burnt flavor caused
by dry heating
of the atomization medium may be avoided, and the taste may be improved.
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Because the atomizer includes the heating body 10, aerosol is quickly formed,
and is not
prone to dry heating, and energy is saved.
In addition, an embodiment of this application further provides an electronic
device. The
electronic device includes a power supply and the atomizer, and the power
supply is electrically
connected to the atomizer to supply power to the atomizer. More specifically,
the electronic
device is an electronic atomizer.
In addition, referring to FIG. 4, an embodiment of this application further
provides a
method for preparing the heating body, including the following steps:
Step S10, according to a preset shape, a raw material configured to prepare
the porous
ceramic body and the heating member are integrally formed to prepare a green
body.
Specifically, the raw material configured to prepare the porous ceramic body
includes a
raw material configured to prepare the substrate and a raw material configured
to prepare the
preheating member.
The raw material configured to prepare the substrate includes ceramic powder,
sintering
auxiliary agent, and pore-forming agent. Specifically, types of the ceramic
powder, the pore-
forming agent, and the sintering auxiliary agent are not particularly limited,
and the ceramic
powder, the pore-forming agent, and the sintering auxiliary agent commonly
used in the art
may be used. For example, the ceramic powder may use a diatomite system or a
zeolite system.
It should be noted that, "ceramic powder" refers to a powdered material
obtained by fully and
uniformly mixing and roasting the raw material (excluding the sintering
auxiliary agent and the
pore-forming agent) used in the preparation of a ceramic.
In an embodiment, in parts by mass, the raw material configured to prepare the
substrate
includes 40 to 70 parts of ceramic powder, 5 to 30 parts of sintering
auxiliary agent, and 10 to
parts of pore-forming agent. In some other embodiments, in parts by mass, the
raw material
25 configured to prepare the substrate includes 45 to 70 parts of ceramic
powder, 10 to 30 parts of
sintering auxiliary agent, and 15 to 30 parts of pore-forming agent.
Certainly, in another
embodiment, types and contents of components of the raw material configured to
prepare the
substrate are not limited to the above, and may further be adjusted according
to an actual
situation.
30 The raw material configured to prepare the preheating member includes
the ceramic
powder, the sintering auxiliary agent, and the pore-forming agent, where the
ceramic powder
includes far infrared ceramic powder. The far infrared ceramic powder refers
to ceramic powder
with far infrared radiation performance. The far infrared ceramic powder
includes at least one
of far infrared ceramic powder with a spinel or inverse spinel ferrite
structure, or high-
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performance infrared ceramic powder prepared by mixing and sintering a
transition metal oxide
and a cordierite system silicate material. In some embodiments, the far
infrared ceramic powder
with the spinel or inverse spinel ferrite structure is far infrared ceramic
powder with a spinel or
inverse spinel ferrite structure including a transition metal oxide (such as
NiO, Cr203, Ti02,
Mil02, CUO, COO, Fe203, ZnO, or the like).
In an embodiment, in parts by mass, the raw material configured to prepare the
preheating
member includes 40 to 80 parts of ceramic powder, 5 to 30 parts of sintering
auxiliary agent,
and 10 to 30 parts of pore-forming agent, where the ceramic powder is the far
infrared ceramic
powder. In some other embodiments, in parts by mass, the raw material
configured to prepare
the preheating member includes 50 to 80 parts of far infrared ceramic powder,
10 to 30 parts
of sintering auxiliary agent, and 15 to 30 parts of pore-forming agent, where
the ceramic
powder is the far infrared ceramic powder.
In some other embodiments, the raw material configured to prepare the
preheating member
includes the far infrared ceramic powder and the ordinary ceramic powder. That
is, the ceramic
powder in the raw material configured to prepare the preheating member
includes the far
infrared ceramic powder, the ordinary ceramic powder, the sintering auxiliary
agent, and the
pore-forming agent. In a specific example, in parts by mass, the raw material
configured to
prepare the preheating member includes 40 to 80 parts of ceramic powder, 5 to
30 parts of
sintering auxiliary agent, and 10 to 30 parts of pore-forming agent, where the
ceramic powder
includes the far infrared ceramic powder and the ordinary ceramic powder. In
some other
embodiments, in parts by mass, the raw material configured to prepare the
preheating member
includes 45 to 70 parts of far infrared ceramic powder, 10 to 30 parts of
sintering auxiliary
agent, and 15 to 30 parts of pore-forming agent, where the ceramic powder
includes the far
infrared ceramic powder and the ordinary ceramic powder. Certainly, in another
embodiment,
types and contents of components of the raw material configured to prepare the
preheating
member are not limited to the above, and may further be adjusted according to
an actual
situation.
In an embodiment, the heating member includes a heating portion and an
infrared heating
layer located on the heating portion.
A material of the heating portion is not particularly limited, and may be
selected according
to a resistance value of a heating member that needs to be prepared.
A material configured to prepare an infrared heating layer includes the far
infrared ceramic
powder, a binder, and a solvent. The far infrared ceramic powder may be the
same as the far
infrared ceramic powder used in the preheating member, and may also be
different from the far
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infrared powder used in the preheating member. The binder is selected from at
least one of an
inorganic binder or an organic binder. Specifically, the inorganic binder is
selected from at least
one of aluminum sol or sodium silicate. The organic binder is selected from at
least one of
Carboxymethyl Cellulose (CMC), acrylic polymer, polyvinyl alcohol (PVA), or
dextrin.
Certainly, the binder is not limited to the above, and may further be other
substances that may
be used as the binder.
In an embodiment, a step of preparing the heating member with the infrared
heating layer
includes: preparing a material configured to prepare the infrared heating
layer into a slurry; and
the slurry is sprayed on the heating wire by using a spraying process (for
example, ion spraying,
a spraying gun, or the like), and is then formed, degummed, and sintered, to
prepare a heating
body. It may be understood that, after being sintered first, the heating
member may be formed
together with the raw material configured to prepare the porous ceramic body,
be degummed,
and be sintered, to prepare the heating body. The formed heating member (a
green body of the
heating member) may also be formed again together with the raw material
configured to
prepare the porous ceramic body, and then be degummed and sintered, to prepare
the heating
body.
It should be noted that, a problem of shrinkage matching between the
preheating member
and the substrate after sintering may be resolved by adjusting a mass ratio of
the sintering
auxiliary agent, the pore-forming agent, and skeleton-forming agent.
In an embodiment, a molding manner in a process of preparing the green body is
one of
injection molding, gel injection molding, or dry pressing molding. Certainly,
the molding
manner in the process of preparing the green body is not limited to the above,
and another
manner may further be used.
Step S402, after degumming, the green body is sintered to prepare the heating
body.
Specifically, a temperature for degumming ranges from 350 C to 700 C; and a
temperature
for sintering ranges from 800 C to 1200 C. In some other embodiments, a
temperature for
degumming ranges from 450 C to 650 C; and a temperature for sintering ranges
from 750 C
to 1100 C. Certainly, in another embodiment, the temperature for degumming and
the
temperature for sintering are not limited to the above, and the temperature
for degumming and
the temperature for sintering may be adjusted according to the prepared porous
ceramic body.
The preparation method for the heating body is simple and convenient, and the
prepared
heating body has a preheating function, and has a good liquid guiding effect.
Especially for
liquid with relatively high viscosity, problems such as poor liquid guiding
and dry heating of
the heating body are not prone to occur. In addition, a preparation method for
the heating body
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CA 03203428 2023-05-26
is simple and convenient, and is easy for industrial production.
The technical features in the foregoing embodiments may be randomly combined.
For
concise description, not all possible combinations of the technical features
in the embodiments
are described. However, as long as combinations of the technical features do
not conflict with
each other, the combinations of the technical features are considered as
falling within the scope
described in this specification.
The foregoing embodiments merely express several implementations of this
application.
The descriptions thereof are relatively specific and detailed, but should not
be understood as
limitations to the scope of this application. For a person of ordinary skill
in the art, several
transformations and improvements can be made without departing from the idea
of this
application. These transformations and improvements belong to the protection
scope of this
application. Therefore, the protection scope of the patent of this application
shall be subject to
the appended claims.
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