CN110731544A

CN110731544A - Atomizing core and electronic atomization device

Info

Publication number: CN110731544A
Application number: CN201910991747.0A
Authority: CN
Inventors: 何雪琴; 肖从文
Original assignee: Shenzhen Mcwell Technology Co Ltd
Current assignee: Shenzhen Mcwell Technology Co Ltd; Shenzhen Smoore Technology Ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-01-31
Also published as: WO2021073564A1

Abstract

The invention relates to atomizing cores and an electronic atomizing device, wherein the atomizing core comprises a substrate and a heating element, the substrate is used for conducting and caching liquid and is provided with an atomizing surface for atomizing the liquid to form smoke, the heating element is used for heating and atomizing the liquid in the substrate, the heating element is in a flat strip-shaped structure with the width larger than the thickness, the heating element is attached to the atomizing surface along the thickness direction of the heating element or embedded in the substrate through the atomizing surface, the heating element is in the strip-shaped structure with the width larger than the thickness, so that the heating element and the substrate can have enough contact area, the heating element can be fully soaked by the liquid in the substrate, the temperature at each part of the heating element is ensured to be uniform, dry burning caused by overhigh local temperature can be prevented, the bonding force between the heating element and the substrate can be increased, the bonding force between the heating element and the substrate is firmer, and the heating element can not be easily overcome the bonding force.

Description

Atomizing core and electronic atomization device

Technical Field

The invention relates to the technical field of electronic atomization, in particular to atomization cores and an electronic atomization device comprising the same.

Background

The electronic atomization device has the appearance and taste similar to those of a common cigarette, but generally does not contain tar, suspended particles and other harmful ingredients in the cigarette, so the electronic atomization device is widely used as a substitute of the cigarette. Electronic nebulizing devices typically employ a heating filament to nebulize a liquid within a matrix to form a smokable aerosol. However, for the traditional electronic atomization device, the heating wire is not fully soaked by liquid, so that the dry burning phenomenon exists; meanwhile, the heating wire is easy to pop out from the base body and separate in the heating process.

Disclosure of Invention

The technical problems solved by the invention are how to avoid dry burning and enhance the bonding force between the heating element and the substrate.

an atomizing core comprising:

the base body is used for conducting and caching liquid and is provided with an atomizing surface for atomizing the liquid to form smoke; and

the heating element is a flat strip-shaped structure with the width larger than the thickness, and the heating element is attached to the atomizing surface along the thickness direction of the heating element or embedded in the substrate through the atomizing surface.

In embodiments, the cross section of the heating element is rectangular, the long side of the rectangle is the width of the heating element, the short side of the rectangle is the thickness of the heating element, and the long side is 20-100 times of the short side.

In of these embodiments, the base body is cylindrical and encloses a gas flow channel for the gas to flow through, and the atomizing surface delimits the gas flow channel.

In embodiments, the heating element further comprises a th electrode and a second electrode embedded in the base body and respectively connected with two ends of the heating element, the base body is provided with an outer peripheral surface opposite to the atomizing surface and an end surface connected between the atomizing surface and the outer peripheral surface, and the th electrode and the second electrode both extend out of the base body through the outer peripheral surface or the end surface.

In of these embodiments, the th electrode and the second electrode are parallel to each other.

In embodiments, the and the second electrode both extend from the same end face of the substrate to the outside of the substrate.

In of the embodiments, the heat generating body is a space spiral body arranged around the central axis of the airflow passage.

In embodiments, the base is a block structure, and the heating element is a plane spiral body.

In embodiments, the heating element is embedded in the substrate, and the surface of the heating element is protruded or flush with the atomizing surface.

In embodiments, the substrate comprises a porous ceramic substrate, and the heating element comprises a nickel-chromium heating element, an iron-chromium-aluminum heating element or a titanium alloy heating element.

In of the examples, the porosity of the matrix is 30-70%, and the average pore diameter of the matrix is 10-50 μm.

electronic atomization device, which is provided with a liquid storage cavity for storing liquid, the electronic atomization device comprises a power supply and a random atomization core, the base body absorbs liquid from the liquid storage cavity, the power supply supplies power to the heating element

The technical effects of the embodiments of the invention are that the heating element is in a flat strip structure with the width larger than the thickness, which can ensure that the heating element has a large enough contact area with the substrate, so that the heating element can be fully soaked by the liquid in the substrate, the temperature of each part on the heating element is uniform, the dry burning caused by overhigh local temperature can be prevented, the bonding force between the heating element and the substrate can be increased, the bonding force between the heating element and the substrate is firmer, the thermal stress generated by the heating element cannot overcome the bonding force to enable the heating element to fall off from the substrate, a sufficient effective heating area can be formed on the heating element, meanwhile, the heating element can be rapidly heated in a short time, and more liquid can be instantly atomized by the heating element to improve the concentration of smoke.

Drawings

FIG. 1 is a schematic partial perspective view of an embodiment showing an example of an atomizing core;

FIG. 2 is a partial perspective view of a second example of an atomizing core provided in the embodiment;

FIG. 3 is a schematic perspective view of the heat-generating body in FIG. 1;

FIG. 4 is a schematic perspective view of an atomizing core provided in accordance with another embodiment ;

FIG. 5 is a schematic partial cross-sectional view of an example of the atomizing core of FIG. 4;

FIG. 6 is a schematic illustration in partial cross-sectional view of a second example atomizing core shown in FIG. 4;

fig. 7 is an exploded view of fig. 6.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It is noted that when elements are referred to as being "secured to" another elements, they may be directly on the other elements or intervening elements may also be present, that when elements are referred to as being "connected" to another elements, they may be directly connected to another elements or intervening elements may be present.

Referring to both fig. 1 and 2, an atomizing cartridge 10 according to an embodiment of the present invention includes a base 100 and a heating element 200. the heating element 200 is configured to conduct or buffer a liquid, typically an aerosol-generating substrate, and the heating element 200 is configured to heat the liquid buffered in the base 100 to atomize the liquid into an aerosol for inhalation by a user.

Referring to fig. 1 and 2, in , the substrate 100 includes a porous ceramic substrate 100, i.e. the substrate 100 is made of a porous ceramic material, so that there are a large number of micropores in the substrate 100 to have a porosity of , which can be defined as the percentage of the volume of the pores in the object to the total volume of the material in the natural state, the porosity of the substrate 100 can range from 30% to 70%, such as 30%, 40%, 50% or 70%, and so on, the average pore size of the micropores in the substrate 100 can range from 10 μm to 50 μm, such as 10 μm, 20 μm, 30 μm or 50 μm, the flow resistance of the liquid when penetrating into the substrate 100 is inversely proportional to the porosity of the substrate 100 and the average pore size of the micropores, i.e. the higher the porosity of the substrate 100 and the average pore size of the micropores, the lower the flow resistance of the substrate 100 to the liquid is generated, at the same time, the substrate 100 made of the porous ceramic material has good high temperature resistance, the liquid in the substrate 100 does not react with the chemical reaction of the substrate 100 under high temperature, and thus the substrate 100 can generate unnecessary heat to atomize the heat, and thus the heat generated by the atomization reaction can be used to prevent the harmful substance from generating and generating the atomization of the substrate 100 from generating the waste and the atomization of the chemical reaction.

Referring to fig. 5 to 7, in , in some embodiments, the heating element 200 includes a ni-cr heating element, an fe-cr-al heating element, or a ti alloy heating element, that is, the heating element 200 may be made of metal or alloy material such as ni-cr, fe-cr-al, or ti alloy, the width a of the heating element 200 is larger than the thickness b and is flat, and the length of the heating element 200 is much larger than the width a and the thickness b, so that the heating element 200 is strip-shaped, and therefore, the heating element 200 is a strip-shaped structure, and the heating element 200 may be directly attached to the atomizing surface 110 of the base 100 along its thickness direction (see fig. 5), or the heating element 200 is embedded in the base 100 through the atomizing surface 110, in other words, the partial region on the atomizing surface 110 is recessed by a set depth to form the groove 120, and the heating element 200 is accommodated in the groove 120, so as to form an embedded relationship with the base 100 (see fig. 6 and 7), when the heating element 200 is embedded in the base 100, the surface of the heating element 200 may be protruded by a set height of the atomizing surface 110, or the heating element 200 is flush with the atomizing surface 110 .

Referring to fig. 3 to 7, for example, the heat-generating body 200 may include two th surfaces 210 and two second surfaces 220, the two th surfaces 210 are disposed opposite to each other, and the two second surfaces 220 are disposed opposite to each other, that is, 0 1 th surface 210 is connected between ends of the two second surfaces 220, and th surface 210 is connected between ends of the two second surfaces 220, the area of the second surface 220 is much larger than that of th surface 210, in which case 7 th surfaces 210 are directed toward th surfaces in the width direction of the heat-generating body 200, and second surfaces 220 are directed toward second surfaces 220 in the thickness direction of the heat-generating body 200, when the heat-generating body 200 is directly attached to the atomizing surface 110 in the thickness direction, second surfaces 220 are directly attached to the atomizing surface 110, and when the heat-generating body 200 is embedded in the thickness direction of the base body 100, the second surfaces 120 of the two second surfaces are flush with the bottom wall surfaces 120 of the atomizing surface, and the grooves 638 of the attaching surface 120 are set flush with the bottom wall surface of the groove 121 or the bottom wall of the groove 120.

The cross section of the heating element 200 is rectangular, the long side of the rectangular cross section is the width a of the heating element 200, and the short side of the rectangular cross section is the thickness b of the heating element. The width a of the heating element 200 may range from 0.2mm to 1mm, and for example, the width a may be specifically 0.2mm, 0.5mm, 0.8mm, 1mm, or the like. The thickness b of the heating element 200 may be in a range of 0.01mm to 1mm, and for example, the thickness b may be specifically 0.01mm, 0.06mm, 0.5mm, 1mm, or the like. No matter how the specific values of the width a and the thickness b of the heating element 200 are changed, it is only necessary to ensure that the value of the width a is greater than that of the thickness b, for example, the specific value of the width a (corresponding to the long side) may be 20 to 100 times, preferably 30 to 80 times, that of the thickness b (corresponding to the short side).

, in the forming process of the atomizing core 10, the contact area of the heating round wire and the substrate 100 is small, the liquid in the substrate 100 is difficult to fully infiltrate the surface of the whole heating round wire, so that some parts of the heating round wire are not infiltrated or fully infiltrated by the liquid, resulting in the local part of the heating round wire forming an overhigh temperature, the heating round wire will generate dry burning to form a scorched smell or oil explosion phenomenon, and simultaneously the service life of the heating round wire is influenced, secondly, the contact area of the heating round wire and the substrate 100 is small, so that the binding force between the heating round wire and the substrate 100 is small, when the heating round wire works, under the action of thermal stress, the local part of the heating round wire, even all the heating round wire overcomes the binding force and is ejected from the substrate 100 to separate from the substrate 100, so that the substrate 100 can not supply the liquid to the heating round wire any more, thereby the heating round wire generates dry burning, and the heating round wire has a lower resistance value, and a lower heat utilization rate in a unit time, thereby causing less smoke utilization rate.

The atomizing core 10 of the above embodiment adopts the heating element 200 having a flat strip structure, and under the condition that the cross section and the resistance value of the conventional heating round wire are the same, the size of the thickness b of the heating element 200 can be reduced and the size of the width a of the heating element can be increased, that is, the area of the th surface 210 is reduced and the area of the second surface 220 is increased, so that the size of the thickness b is far smaller than the diameter of the conventional heating round wire, in other words, the heating element 200 becomes wider and thinner, and the total surface of the heating element 200 is larger than the total surface of the heating round wire.

Referring to fig. 1 to 3, in , the base 100 may be a cylindrical tube structure, the base 100 is a hollow structure, that is, the base 100 encloses airflow channels 101 for flowing gas and smoke, and the atomizing surface 110 is an inner surface of the base 100 and defines a boundary of the airflow channels 101. the base 100 of the tube structure further has an outer peripheral surface 120 and two end surfaces 130, the outer peripheral surface 120 is opposite to the atomizing surface 110, and the two end surfaces 130 are located at two ends of the base 100 and are respectively connected between the outer peripheral surface 120 and the atomizing surface 110. in this embodiment, the heating element 200 is disposed around a central axis of the airflow channels 101, such that the heating element 200 is a spatial spiral structure.

Referring to fig. 1 to 3, the atomizing core 10 further includes th electrode 310 and second electrode 320, wherein the th electrode 310 and second electrode 320 are embedded in the base 100 and connected to two ends of the heating element 200, respectively, for example, th electrode 310 and second electrode 320 may extend from the outer peripheral surface 120 of the tubular structure base 100 to the outside of the base 100, for example, th electrode 310 and second electrode 320 may extend from the same end surfaces 130 of the tubular structure base 100 to the outside of the base 100, for example, th electrode 310 may extend from end surfaces 130 of the tubular structure base 100 to the outside of the base 100, and second electrode 320 may extend from the other end surfaces 130 of the tubular structure base 100 to the outside of the base 100.

Referring to fig. 4, in embodiments, the substrate 100 may be a rectangular parallelepiped block structure, and the heating element 200 is a planar spiral structure, in which case the heating element 200 is similar to a mosquito coil or an involute structure.

In other embodiments, the shape of the heating element 200 may also be wound into a plane or a space sine curve, etc., the number of the heating elements 200 may be multiple, and the multiple heating elements 200 may make the temperature distribution of each region of the atomizing surface 110 more uniform, so as to ensure that the concentration of the smoke formed by atomizing in each region of the atomizing surface 110 is consistent, thereby improving the taste of the smoke.

The invention also provides electronic atomization devices, which comprises a power supply, a control component and the atomization core 10, the electronic atomization device can be provided with a liquid storage cavity for storing liquid, the base 100 can be in direct contact with the liquid in the liquid storage cavity, under the capillary action of the base 100, the liquid in the liquid storage cavity can continuously permeate into the base 100 for atomization, the positive pole of the power supply can be connected with the electrode 310 of the atomization core 10, the negative pole of the power supply can be connected with the second electrode 320 of the atomization core 10, so as to realize the power supply of the power supply to the heating element 200, when a user sucks, the control component controls the power supply to supply power to the heating element 200, the heating element 200 generates heat to atomize the liquid, when the user stops sucking, the control component controls the power supply to stop supplying power to the heating element 200, and the heating element 200 stops generating heat.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

An atomizing core of , comprising:

the base body is used for conducting and caching liquid and is provided with an atomizing surface for atomizing the liquid to form smoke; and

the heating element is a flat strip-shaped structure with the width larger than the thickness, and the heating element is attached to the atomizing surface along the thickness direction of the heating element or embedded in the substrate through the atomizing surface.
2. The atomizing core according to claim 1, characterized in that the cross section of the heat-generating body is rectangular, and the long side of the rectangle is the width of the heat-generating body and the short side is the thickness of the heat-generating body; the long side is 20-100 times of the short side.
3. The atomizing core according to claim 1, wherein the base body is of cylindrical configuration and encloses a gas flow channel for the passage of gas, the atomizing surface bounding the gas flow channel.
4. The atomizing core according to claim 3, further comprising th and second electrodes embedded in the base and connected to both ends of the heat-generating body, respectively, wherein the base has an outer peripheral surface disposed opposite to the atomizing surface and an end surface connected between the atomizing surface and the outer peripheral surface, and both the th and second electrodes extend out of the base through the outer peripheral surface or the end surface.
5. The atomizing core of claim 4, wherein the th electrode and the second electrode are parallel to each other.
6. The atomizing core of claim 4, wherein both the th, second electrode extend from the same end face of the base body beyond the base body.
7. The atomizing core of claim 3, wherein the heat-generating body is a spatial helix disposed around a central axis of the airflow passage.
8. The atomizing core according to claim 1, wherein the base is a block structure, and the heating element is a planar spiral.
9. The atomizing core according to claim 1, characterized in that the heating element is embedded in the base body, and the surface of the heating element protrudes or is flush with the atomizing surface.
10. The atomizing core of claim 1, wherein the matrix comprises a porous ceramic matrix; the heating body comprises a nickel-chromium heating body, an iron-chromium-aluminum heating body or a titanium alloy heating body.
11. The atomizing core of claim 1, wherein the matrix has a porosity of 30% to 70% and an average pore diameter of 10 μm to 50 μm.
12, kinds of electronic atomization device, characterized by, offer the stock solution cavity used for storing the liquid, the stated electronic atomization device includes power and the stated atomization wick of any in claims 1-11, the stated basal body sucks the liquid from the stated stock solution cavity, the stated power supplies power to the stated heat-generating body.