WO2023193593A1

WO2023193593A1 - Atomization core and electronic atomization device

Info

Publication number: WO2023193593A1
Application number: PCT/CN2023/082480
Authority: WO
Inventors: 陈霏; 李波; 张耀华; 龙继才; 周宏明
Original assignee: 海南摩尔兄弟科技有限公司
Priority date: 2022-04-06
Filing date: 2023-03-20
Publication date: 2023-10-12
Also published as: CN217509914U

Abstract

An atomization core (10), comprising: a porous matrix (100), having a first surface (110) and a second surface (120) arranged at an interval in the thickness direction and opposite to each other; a heating body (300), attached to the first surface (110); and an insulation matrix (200), provided on the second surface (120) and provided with a liquid guide hole (210) communicated with the second surface (120).

Description

Atomizer core and electronic atomization device

Technical field

The present application relates to the field of electronic atomization technology, and in particular to an atomization core and an electronic atomization device including the atomization core.

Background technique

The atomizing core usually includes a porous ceramic matrix and a heating film. The heating film is attached to the porous ceramic matrix. The porous ceramic matrix is in direct contact with the liquid atomizing medium in the liquid storage chamber. The porous ceramic matrix can transmit and transmit the atomizing medium. Caching effect. When the heating film is energized, the heating film converts electrical energy into heat, and the heat is transferred to the porous ceramic matrix, causing the atomization medium cached in the porous ceramic matrix to atomize under the action of heat to form an aerosol. However, the traditional atomizing core cannot uniformly heat the atomizing medium, which affects the reduction degree of the atomizing medium and ultimately affects the inhalation taste of the aerosol.

Contents of the invention

One technical problem solved by this application is how to achieve uniform heating of the atomized medium.

An atomizer core includes:

A porous matrix having first and second surfaces spaced apart along the thickness direction and facing oppositely;

A heating element attached to the first surface; and

A heat-insulating base body is provided on the second surface and is provided with a liquid conduction hole communicating with the second surface.

An electronic atomization device includes a power supply and the above-mentioned atomization core, and the power supply is electrically connected to the heating element.

The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects and advantages of the invention will become apparent from the description, drawings and claims.

Description of drawings

To better describe and illustrate embodiments and/or examples of those inventions disclosed herein, reference may be made to one or more of the accompanying drawings. The additional details or examples used to describe the drawings should not be construed as limiting the scope of any of the disclosed inventions, the embodiments and/or examples presently described, and the best modes currently understood of these inventions.

Figure 1 is a schematic plan view of the atomizing core provided in the first embodiment;

Figure 2 is a schematic plan view of the atomizing core provided in the second embodiment.

Detailed ways

In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are shown in the accompanying drawings. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and comprehensive understanding of the disclosure of the present application.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements may also be present. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may also be intervening elements present. The terms "inner", "outer", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.

Referring to FIG. 1 , an electronic atomization device provided by an embodiment of the present application includes an atomization core 10 and a power supply. The power supply supplies power to the atomization core 10 . The atomization core 10 includes a porous matrix 100, an insulating matrix 200 and a heating element 300. The heating element 300 and the insulating matrix 200 are both attached to the porous matrix 100. The power supply is electrically connected to the heating element 300. When the power supply supplies power to the heating element 300 When, the heating element 300 converts electrical energy into thermal energy.

In some embodiments, both the porous matrix 100 and the thermal insulation matrix 200 have a block structure, and a large number of micropores are formed inside the porous matrix 100. In view of the existence of micropores, the entire porous matrix 100 will have a certain porosity. Porosity can be defined as the total volume of micropores as a percentage of the total volume of the porous matrix. The porosity may range from 70% to 95%. For example, its specific value may be 70%, 80%, 90% or 95%. Since the porous matrix 100 has a certain porosity, the porous matrix 100 The body 100 can absorb and transmit liquid through capillary force, so the porous matrix 100 can produce a certain buffering and transmission effect on liquid. The porous matrix 100 is made of porous ceramic material or glass material. On the one hand, the porosity of the porous matrix 100 meets the above requirements. On the other hand, the porous matrix 100 made of ceramic and glass materials has relatively stable chemical properties and can prevent the porous matrix from 100 undergoes chemical reactions at high temperatures to form harmful gases, which prevents harmful gases from being absorbed by the user and improves the safety of use of the atomizing core 10 . At the same time, the thermal conductivity of the porous matrix 100 is 0.3W/mK to 5W/mK. The specific value of the thermal conductivity of the porous matrix 100 can be 0.3W/mK, 0.4W/mK or 0.5W/mK, etc., so the porous matrix 100 has Good thermal conductivity. The thickness H of the porous matrix 100 ranges from 0.2 mm to 1 mm. For example, the thickness H of the porous matrix 100 ranges from 0.2 mm to 1 mm. The specific value may be 0.2 mm, 0.5 mm, 0.8 mm or 1 mm.

When the thickness of the porous matrix 100 is larger, the volume of the porous matrix 100 is larger, and the amount of atomized medium buffered when the porous matrix 100 reaches a saturated state is larger. When the porosity of the porous matrix 100 is larger, the amount of atomized medium buffered when the porous matrix 100 reaches a saturated state is also larger. In view of the above-mentioned porosity and thickness settings of the porous matrix 100, the amount of liquid atomization medium buffered when the porous matrix 100 reaches a saturated state is 5 mg to 10 mg. For example, the amount of atomized medium buffered by the porous matrix 100 in a saturated state is: 5mg, 8mg or 10mg, etc., and the amount of atomized medium that the user needs to consume in one puffing process is also about 5mg to 10mg, so the amount of atomized medium cached by the porous matrix 100 in the saturated state is close to the user The amount of atomized medium consumed during one puffing process.

The porous matrix 100 has a first surface 110 and a second surface 120 . Both the first surface 110 and the second surface 120 may be substantially planar. The first surface 110 and the second surface 120 are spaced apart along the thickness direction of the porous matrix 100 and toward On the contrary, in other words, the first surface 110 and the second surface 120 are two surfaces in the thickness direction of the porous matrix 100 . The heating element 300 can be made of metal material. The heating element 300 has a reasonable resistance. When the power supply supplies power to the heating element 300, the heating element 300 generates enough heat per unit time, and the atomized medium will absorb the heat and rise. to the atomization temperature to form aerosol by atomization. The heating element 300 may have a line-like structure or a film-like structure. The heating element 300 can be directly attached and stacked on the first surface 110 , or it can cooperate with the groove formed in the first surface 110 , so that the heating element 300 is embedded in the porous matrix 100 .

The heat insulation matrix 200 is made of dense material. The porosity of the heat insulation matrix 200 is extremely low and is much smaller than the porosity of the porous matrix 100. The heat insulation matrix 200 will not be able to produce capillary action, so the heat insulation matrix 200 cannot be as good as the porous matrix 100. The internal micropores have the function of transmitting and buffering the atomized medium, and the porosity of the thermal insulation matrix 200 can be less than 10%. The thermal insulation matrix 200 has good thermal insulation performance. The thermal conductivity of the thermal insulation matrix 200 is much smaller than that of the porous matrix 100. The thermal conductivity of the thermal insulation matrix 200 is 0.01W/mK to 2W/mK. For example, the thermal insulation matrix 200 The specific value of thermal conductivity can be 0.01W/mK, 0.05W/mK or 2W/mK, etc. The thickness of the thermal insulation matrix 200 is greater than the thickness of the porous matrix 100 . For example, the thickness of the thermal insulation matrix 200 may be two to five times the thickness of the porous matrix 100 . Therefore, the thickness of the thermal insulation matrix 200 is larger than the thickness of the porous matrix 100 .

In other embodiments, the thermal insulation matrix 200 may also have a relatively large porosity, so that the thermal insulation matrix 200 can also generate capillary force through the internal micropores, thereby also having the function of transmitting and buffering the atomized medium.

The heat insulation base 200 has a third surface 230 and a fourth surface 240 . Both the third surface 230 and the fourth surface 240 may be substantially planar. The third surface 230 and the fourth surface 240 are spaced apart along the thickness direction of the heat insulation base 200 . And the directions are opposite. In other words, the third surface 230 and the fourth surface 240 are two surfaces in the thickness direction of the heat insulation substrate 200 , and the third surface 230 is attached to the second surface 120 of the porous substrate 100 . The heat-insulating base 200 is provided with a liquid-conducting hole 210. The liquid-conducting hole 210 simultaneously penetrates the third surface 230 and the fourth surface 240. Therefore, the liquid-conducting hole 210 is a through hole. The liquid-conducting hole 210 can be along the edge of the heat-insulating base 200. Extending in the thickness direction, at this time, the central axis of the liquid conducting hole 210 may be perpendicular to the third surface 230 and the fourth surface 240 . The liquid conduction hole 210 may also extend in a direction that is at an angle with the thickness direction of the heat insulation base 200, so that the central axis of the liquid conduction hole 210 intersects the third surface 230 and the fourth surface 240 at an acute angle. Along the direction from the fourth surface 240 to the third surface 230, the diameter of the liquid conduction hole 210 can remain constant, or can maintain a shape of gradually decreasing, gradually increasing, or first decreasing and then increasing. The value range of the diameter of the liquid conduction hole 210 is less than 1 mm. For example, the value of the diameter of the liquid conduction hole 210 may be 0.5 mm, 0.8 mm or 1 mm.

It can be understood that in some embodiments, the liquid conduction holes 210 can be disposed parallel to the third surface 230. Specifically, the liquid conduction holes 210 are disposed at the interface of the heat insulation matrix 200 and the porous matrix 100. On the other hand, the side of the heat insulation base 200 is connected to the outside, and the atomized medium enters the liquid conduction hole 210 from the side and then is transmitted to the second surface 120 .

When the porosity of the thermal insulation matrix 200 is low, the atomized medium directly transmits the atomized medium to the second surface 120 through the liquid conduction hole 210 , and the atomized medium arriving at the second surface 120 acts on the capillary force of the porous matrix 100 It is transported downward toward the first surface 110 to ensure that the atomized matrix is evenly distributed inside the porous matrix 100 . When the user inhales, the power supply will supply power to the heating element 300, which converts electrical energy into heat. The atomization medium cached in the porous matrix 100 will absorb the heat and reach the atomization temperature, and finally atomize to form an aerosol.

Referring to Figure 2, in some embodiments, both the porous matrix 100 and the thermal insulation matrix 200 are tubular structures with lumens. At this time, the first surface 110, the second surface 120, the third surface 230 and the fourth surface All four surfaces 240 may be cylindrical surfaces. The porous matrix 100 is nested outside the heat insulation matrix 200 so that the second surface 120 is nested on the third surface 230 . The atomized medium in the liquid storage chamber first enters the lumen of the heat insulation matrix 200 and then is transmitted to the second surface 120 through the liquid conduction hole 210 , which can also make the atomized matrix evenly distributed inside the porous matrix 100 .

If the thermal insulation matrix 200 is not provided and the thickness of the porous matrix 100 is relatively large, the second surface 120 of the matrix will be in direct contact with the atomized medium in the liquid storage chamber, and the second surface 120 will absorb the liquid and move toward the first The surface 110 transmits such that the atomized medium is cached inside the porous matrix 100 . In view of the relatively large thickness of the porous matrix 100, it can be divided into three blocks along the thickness direction of the porous matrix 100. The first block is disposed close to the first surface 110, the third block is disposed close to the second surface 120, and the second block is disposed close to the second surface 120. The block is located between the first block and the third block. It can be understood that the first block and the third block are located at the ends of the porous base 100 , and the second block is located in the middle of the porous base 100 . Since the heating element 300 is directly disposed on the first surface 110, the heat generated by the heating element 300 is transmitted from the first surface 110 to the second surface 120. Considering the heat loss during the transmission process, within unit time, the first block absorbs The high-temperature block absorbs the most heat and is the highest temperature. The second block absorbs heat, followed by the medium-temperature block with a relatively lower temperature. The third block absorbs the least heat and is the low-temperature block with the lowest temperature.

Therefore, there is a temperature gradient in the porous matrix 100 due to uneven heat distribution, so that the atomization medium in each part of the porous matrix 100 cannot be uniformly heated and atomized. Specifically, located within the first block The atomization medium can reach the atomization temperature and atomize smoothly to form aerosol. However, some low-boiling-point components in the atomization medium in the medium-temperature zone can be atomized, while high-boiling-point components cannot be atomized. This will make the porous matrix The composition of the aerosol produced by each part of the atomization medium within 100 degrees is different, which affects the reduction degree of the atomization medium and ultimately affects the inhalation taste of the aerosol. At the same time, the third block also has a certain temperature and directly contacts the atomization medium in the liquid storage chamber. The atomization medium in the liquid storage chamber will also absorb the heat in the third block, causing the low boiling point in the atomization medium. The components volatilize, causing the composition of the atomization medium in the liquid storage chamber to change, ultimately affecting the composition of the aerosol and the user's inhalation taste.

The atomizing core 10 in the above embodiment will have at least the following three beneficial effects:

First, since the thermal insulation matrix 200 is attached to the third surface 230, when the heating element 300 generates heat, the heat is only transmitted within the porous matrix 100 and cannot be transmitted within the thermal insulation matrix 200, and the thickness of the porous matrix 100 is relatively small. is small, so the heat transmission path in the porous matrix 100 is short, and the heat loss during the transmission process is small, so that the heat is evenly distributed inside the porous matrix 100 along the thickness direction of the porous matrix 100, eliminating the temperature gradient in the porous matrix 100 and A uniform temperature distribution is achieved, thereby achieving uniform heating of the atomization medium cached everywhere in the porous matrix 100, thereby improving the reduction degree of the atomization medium and the suction taste of the aerosol.

Secondly, since the heat generated by the heating element 300 cannot be transmitted to the heat insulation matrix 200, the atomization medium in the liquid storage chamber cannot absorb the heat in the heat insulation matrix 200 and volatilize. This ensures the consistency of the atomization medium composition and improves the efficiency of the atomization medium. The reduction degree of the atomization medium and the suction taste of the aerosol. At the same time, the diameter of the liquid guide hole 210 is less than 1 mm. On the one hand, it can ensure that the atomized medium in the liquid storage chamber is smoothly supplied to the porous substrate 100 through the liquid guide hole 210, thereby preventing the porous substrate 100 and the heating element 300 from insufficient supply of atomized medium. And produce dry burning. On the other hand, it reduces the possibility that the heat on the porous matrix 100 is transmitted to the liquid storage chamber through the atomized medium in the liquid conduction hole 210, and reduces the probability that the atomized medium in the liquid storage chamber volatilizes due to heat absorption.

Third, given that the amount of atomized medium cached by the porous matrix 100 in a saturated state is 5 mg to 10 mg, it is just close to the amount of atomized medium that the user needs to consume in one puffing process. Therefore, when the user takes the last puff, the electronic atomization device will pause for a period of time, and all the atomization medium on the porous substrate 100 will be consumed, which can effectively prevent the residual heat on the porous substrate 100 from damaging the porous substrate. The remaining atomization medium within 100 days is heated to avoid changing the composition due to the evaporation of low-boiling point substances in the remaining atomization medium. It can also improve the reduction degree of the atomization medium and the inhalation taste of the aerosol.

The technical features of the above-described embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, All should be considered to be within the scope of this manual.

The above-described embodiments only express several implementation modes of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

An atomizing core is characterized by including:

A porous matrix having first and second surfaces spaced apart along the thickness direction and facing oppositely;

A heating element attached to the first surface; and

A heat-insulating base body is provided on the second surface and is provided with a liquid conduction hole communicating with the second surface.
The atomization core according to claim 1, characterized in that the porosity of the thermal insulation matrix is lower than the porosity of the porous matrix.
The atomization core according to claim 1, wherein the thickness of the porous matrix is 0.2 mm to 1 mm.
The atomization core according to claim 1, characterized in that the heat-insulating base body has a third surface and a fourth surface spaced apart along its own thickness direction and facing opposite directions, and the third surface is attached to the second surface. On the surface, the liquid-conducting hole penetrates both the third surface and the fourth surface.
The atomization core according to claim 4, wherein the central axis of the liquid conduction hole extends along the thickness direction of the heat insulation base body.
The atomizing core according to claim 1, characterized in that the diameter of the liquid conduction hole is less than 1 mm.
The atomization core according to claim 1, characterized in that the thickness of the thermal insulation matrix is greater than the thickness of the porous matrix.
The atomization core according to claim 1, wherein the amount of atomization medium buffered by the porous matrix in a saturated state is 5 mg to 10 mg.
The atomization core according to claim 1, characterized in that the porosity of the porous matrix is 70% to 95%, and the porosity of the thermal insulation matrix is less than 10%.
The atomization core according to claim 1, characterized in that the thermal conductivity of the insulating matrix is lower than the thermal conductivity of the porous matrix, and the thermal conductivity of the porous matrix is 0.3W/mK to 5W/mK.
The atomization core according to claim 1, characterized in that the thickness of the thermal insulation matrix is two to five times the thickness of the porous matrix.
The atomization core according to claim 1, wherein the diameter of the liquid conduction hole remains constant along the extending direction of the liquid conduction hole.
The atomization core according to claim 1, characterized in that the heating element has a linear structure or a diaphragm structure.
The atomization core according to claim 1, wherein the heating element is stacked on the first surface.
The atomization core according to claim 1, characterized in that a groove is formed in a depression on the first surface, and the heating element cooperates with the groove.
The atomization core according to claim 1, characterized in that the thermal conductivity of the thermal insulation matrix is 0.01W/mK to 2W/mK.
The atomizing core according to claim 1, characterized in that the porous matrix is made of porous ceramic material or glass material.
The atomization core according to claim 1, characterized in that both the porous matrix and the heat-insulating matrix have a block structure.
The atomization core according to claim 1, characterized in that both the porous matrix and the heat-insulating matrix are tubular structures with a lumen, and the porous matrix is sleeved on the heat-insulating matrix. In addition, the liquid-conducting hole and the lumen of the heat-insulating base body are interconnected.
An electronic atomization device, characterized in that it includes a power supply and the atomization core according to any one of claims 1 to 19, and the power supply is electrically connected to the heating element.