CN112167725B - Application of organic porous material in aerosol generating device and atomizer using material - Google Patents

Abstract

The application relates to the application of an organic porous material in an aerosol generating device, and an atomizer using the material. The organic porous material is at least partly a melamine resin porous material, which has a decomposition temperature exceeding 400°C and can be used for a long time at a high temperature of 180-240°C without changing its properties, thus being able to cover fog The working temperature range of the nebulizer; in addition, the material has a high porosity and a controllable pore size distribution, which can simultaneously achieve good liquid guiding and liquid locking performance, and is an ideal liquid guiding material for the nebulizer. The application of the organic porous material in the atomizer has the advantages of fast liquid absorption, high liquid storage capacity, smooth liquid conduction, formation of nano capillary microstructure after infiltration of liquid, and outstanding liquid locking ability.

Description

Application of an organic porous material in an aerosol generating device and the use of the material atomizer

technical field

The invention relates to the field of aerosol generating devices, in particular to the use of an organic porous material in an aerosol generating device and an atomizer using the organic porous material.

Background technique

The device that turns the atomized liquid containing nicotine into an aerosol by heating and atomizing the atomizing core is an electronic product that imitates cigarettes. The aerosol produced has the smoke, taste and feeling similar to cigarettes. This nicotine-containing aerosol produced by atomization does not contain harmful carcinogens such as tar commonly found in ordinary cigarette smoke, and is considered to be a cigarette substitute that is beneficial to the health of traditional smokers. At the same time, this electronic device has the characteristics of good portability, no open flame, no second-hand smoke and environmental protection, and is favored by many smokers.

There are two main types of heating atomization technology for aerosol generating devices: 1) cotton or fiber bundles are used as the conductive liquid, and the electric heating wire is wound on it to directly heat the smoke oil to atomize it; 2) honeycomb As a conductive liquid, ceramics are heated by electric heating wires or electric heating bands to atomize the e-liquid.

Cotton or fiber bundles are used as a conductive liquid, which has the characteristics of simple structure and good effect, and has been fully recognized by users in the open-type oil-dripping and large-smoke atomizing core. Cotton is relatively fluffy and has high oil absorption, but poor heat resistance. The ignition point is only 150°C. The low compression modulus can easily cause large permanent deformation. It is difficult to solve the problems of oil leakage and burnt core when used in closed pod vapes. Fiber bundles or glass wool made of glass or special polymers have good heat resistance, but have high density, low saturated oil absorption, and unsatisfactory liquid locking ability.

Porous ceramics sintered by aggregate, binder and pore-forming agent, etc., have a large number of pore structures that penetrate each other and communicate with the surface of the material. They have stable chemical properties, low thermal conductivity, high temperature resistance and corrosion resistance. Performance, to a certain extent, make up for the performance defects of cotton and fiber bundles. However, porous ceramics are commonly used in the industry to conduct liquids, which generally have problems such as low porosity and large pore diameters. The liquid absorption and liquid conduction can basically meet the design requirements, but the liquid locking ability needs to be improved, that is, it is easy to leak oil.

Contents of the invention

In order to solve the oil leakage problem of the atomizing core in the prior art and the sticky core problem of the cotton liquid-conducting material, the present invention creatively proposes the following solutions.

In a first aspect, the present invention provides an application of an organic porous material in an aerosol generating device, the organic porous material is at least partially a melamine resin porous material.

Further, the apparent density of the organic porous material is 3-120×10 ^-3 g/cm ³ , preferably 4-12×10 ^-3 g/cm ³ .

Further, the 25% deformation compressive strength of the organic porous material is 5-30KPa.

Further, the organic porous material has a decomposition temperature higher than 300°C, preferably higher than 350°C, more preferably higher than 400°C.

Further, the open porosity of the organic porous material is greater than 60%, preferably greater than 80%, more preferably greater than 95%.

Further, the pore size distribution of the organic porous material is such that more than 90% of the pore volume has a pore size ranging from 10 nanometers to 100 micrometers, preferably from 10 nanometers to 1 micrometer, more preferably from 10 nanometers to 100 nanometers, and even more preferably 10nm-50nm.

Further, the aerosol generating device includes a heating element, and the organic porous material is used as a conductive liquid in contact with or adjacent to the heating element.

Further, the aerosol generating device includes a heating element, the organic porous material is used as a conductive liquid, and other porous materials are included between the organic porous material and the heating element.

In a second aspect, the present invention also provides an atomizer of an aerosol generating device, which includes:

A housing; a liquid storage bin for storing atomized liquid is formed in the housing, and the liquid storage bin includes an outlet; an aerosol channel extending along the longitudinal direction of the housing is formed in the housing, and the aerosol channel includes an inlet and an air outlet, the air outlet being located at one end of the housing;

An atomizing core, the atomizing core is accommodated in the shell, the outlet of the liquid storage chamber communicates with the liquid-absorbing surface of the atomizing core; the atomizing surface of the atomizing core communicates with the aerosol channel, and its characteristics In that, the atomizing core is at least partially made of a melamine resin porous material;

a fixing piece, used for fixing the atomizing core and the shell;

A heating element, the heating element is in contact with or adjacent to the atomizing surface; and

The electrodes are used to electrically connect the heating element and allow the heating element to receive electric power.

Further, the atomizing core includes porous ceramics and a melamine resin porous material, one of the surfaces of the porous ceramics forms the atomization surface, and one of the surfaces of the melamine resin porous material forms the liquid absorption surface , the melamine resin porous material at least partially covers the porous ceramic, so that the atomized liquid enters the atomizing core through the liquid-absorbing surface, and conducts to the atomizing surface.

The organic porous material is at least partially a melamine resin porous material, such as a melamine sponge. In the present invention, preferably, the melamine resin porous material can be used as a whole as the liquid-conducting material of the aerosol generating device. It is also possible to composite the melamine resin porous material with other porous materials to form a conductive liquid, for example, the melamine resin porous material is composited with non-woven fabrics, cotton and other materials with capillary phenomena to form a liquid conductive material, and the compounding can be bonding, Can also be stacked etc.

Melamine sponge is a material with a three-dimensional porous structure. Its porosity can be as high as 99%, and its opening rate can be as high as more than 95%. The fire is self-extinguishing. The melamine resin decomposes slowly when the temperature exceeds 420°C, and the thermal decomposition products are harmless to the human body. Because of its stable chemical and cross-linked structure, melamine sponge has excellent chemical stability, safety and environmental protection.

Compared with cotton commonly used in the field, the organic porous material provided by the present invention has the advantages of high saturated liquid absorption capacity, good shape retention after saturated liquid absorption, high temperature resistance, etc., which is conducive to better delivery of liquid e-liquid to the heating wire.

Compared with the ceramic porous materials commonly used at present, the organic porous material provided by the present invention has a high porosity, and can transport and conduct liquid e-liquid more smoothly. The found material has good e-liquid affinity, endowing the present invention with The organic porous material has good liquid-holding ability for liquid e-liquid.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in accompanying drawing:

Fig. 1 is the microstructure SEM photograph and the aperture distribution of a kind of melamine resin porous material of the present invention;

Fig. 2 is the structural sectional schematic diagram of an embodiment of the aerosol generating device that adopts organic porous material;

Fig. 3 is a schematic cross-sectional structure diagram of another embodiment of an aerosol generating device using an organic porous material. The organic porous material covers the surface of the porous ceramic heating element sintered with electric heating wires inside to make up for the lack of liquid locking ability of porous ceramics.

Fig. 4 is a physical diagram of an atomizing core in an embodiment in which the surface of a porous ceramic heating element with an electric heating wire sintered inside is covered with a melamine resin porous material. The figure clearly shows that the liquid-locking ability of the melamine resin porous material is better than that of the porous ceramics, and the ceramic part has seeped out, while the surface of the melamine resin porous material part is wet but no liquid seeps out.

Figure 5 is a schematic structural diagram of an embodiment of an open-type large-smoke atomization core using organic porous materials, which is an embodiment of directly using organic porous materials as oil storage and oil guide bodies, and is applied to open-type oil-dropping large-smoke atomization cores middle.

Fig. 6 is a comparison photo of the liquid-locking ability of the absorbent cotton atomizing core (a) and the atomizing core of porous melamine resin material (b).

Figure 7 is a comparison photo of the absorbent cotton atomizing core (a) and the melamine resin porous material atomizing core (b) in liquid storage and anti-burning effect.

Markings in the attached drawings:

1-heating body;

2- Organic material porous body;

3 - Seals;

4- liquid e-liquid;

5 - air inlet;

6 - Aerosol outlet;

7- The flow direction of liquid e-liquid;

8 - aerosol escape pipe;

9- Atomizer housing;

10-positive pole of power supply, 11-negative pole of power supply;

12 - sealing cover;

13-a ceramic porous body embedded with a heating wire.

Detailed ways

The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. The embodiments are only limited to a clearer understanding of the technical features, purposes and effects of the present invention, rather than limiting the present invention.

Fig. 1 is the microstructure SEM photo (a) and pore size distribution (b) of a kind of melamine resin porous material of the present invention;

The melamine resin porous material is a kind of flexible nano-ultrafine fiber foam plastic with a narrow pore size distribution. In addition, the melamine resin sponge has high temperature resistance and is suitable for long-term work under the working conditions of 200-240°C, 400°C There is no volatilization and deformation phenomenon below. For the liquid-guiding and locking ability of liquid e-liquid in the melamine resin sponge, there is no obvious relationship with the pore size of the melamine sponge. Good oil-conducting performance can be achieved from an average pore diameter as low as about 20 nanometers to an average pore diameter of 100 microns. and lock oil effect.

Referring to FIG. 2 , it is a schematic cross-sectional structure diagram of an embodiment of an aerosol generating device using organic porous materials.

A spiral heating element 1 made of electric heating wire or electric heating coil, coiled on the surface of a cylindrical organic material porous body 2;

The shape of the organic material porous body 2 is a dumbbell-shaped structure with a thinner middle part and thicker ends;

The shape of the aerosol escape pipe 8 is a circular tube, and the bottom is provided with a through horizontal circular symmetrical hole, and the organic material porous body 2 coiled with the heating element 1 is installed in this circular symmetrical hole in a horizontal manner. The thicker dumbbell-shaped structure can also play a sealing role to prevent liquid e-liquid from leaking after absorbing the liquid e-liquid 4 in the liquid storage chamber;

The bottom of the atomizer shell 9 of the aerosol generating device is an open structure for injecting liquid e-liquid; after the aerosol escape pipe 8, heating element 1, porous body 2 and liquid e-liquid 4 are assembled, they are made of silicone rubber The sealing part seals the bottom of the housing 9 of the aerosol generator.

The liquid e-liquid 4 enters the liquid storage part inside the porous body through the liquid absorption surface of the porous body 2 and reaches the atomization surface. The flow direction of the e-liquid is shown in 7.

When the pumping action occurs, the trigger controller supplies power through the electrodes 10 and 11, and the heating element transfers heat to the liquid e-liquid on the atomizing surface of the porous body.

The liquid e-liquid on the atomizing surface receives the heat transferred by the heating element 1, transforms into a gaseous state, and interacts with the air entering from the air inlet 5 to generate aerosol, which escapes from the aerosol outlet 6.

This embodiment is an aerosol generator with a simple structure, which is characterized by making full use of the microscopic three-dimensional nano-network structure of organic porous materials to achieve rapid liquid absorption, effectively increase the liquid storage capacity, and strengthen the liquid e-liquid inside the porous body The unobstructed conveying ability; after infiltrating the liquid, a nano-capillary microstructure is formed, and the liquid locking ability is outstanding, which can effectively solve the problem of "easy oil leakage"; the aerosol smoke generated by the atomizing surface of the porous body immediately follows the suction direction along the direction of escape. There is no such problem as "taste loss" caused by retention or repeated heating, and the probability of "pyrolysis by-products" is also greatly reduced.

Referring to FIG. 3 and FIG. 4 at the same time, it is a schematic cross-sectional structure diagram and a physical diagram of the atomizing core of another embodiment of an aerosol generating device using organic porous materials.

The organic material porous body 2 covers the surface of the ceramic porous body 13 sintered with the heating wire 1 inside to make up for the lack of liquid-locking ability of porous ceramics.

Porous ceramics are currently used in the industry to conduct liquids. Ceramic porous bodies have excellent properties such as stable chemical properties, low thermal conductivity, high temperature resistance and corrosion resistance, which make up for the performance defects of cotton and fiber bundles to a certain extent.

However, limited to the brittleness and fragility of ceramic materials, ceramic porous bodies generally have problems such as low porosity and large pore diameter. The porosity ranges from 40% to 80%, and the pore diameter is between 10 μm and 300 μm. The design requirements can basically be met in terms of liquid absorption and liquid conduction, but the liquid locking ability needs to be improved, that is, it is easy to leak oil.

Fig. 4 shows a physical diagram of an embodiment in which organic porous materials are used to wrap and cover the surface of a porous ceramic heating element with electric heating wires sintered inside. The figure clearly shows that the liquid-locking ability of the organic porous material is better than that of the porous ceramic. The ceramic part has seeped out and hung on the lead wire of the heating wire, while the surface of the organic porous material part is wet but no liquid seeps out.

Referring to FIG. 5 , it is a schematic structural diagram of an embodiment of an open-type oil-dropping large-smoke atomization core using organic porous materials.

In this embodiment, the organic porous material is directly used as the oil storage carrier and the oil guide body, which is applied to the open-type oil dripping large smog atomization core, directly replacing the cotton oil storage carrier and the oil guide body used in the industry.

The ignition point of cotton is only 150°C, so it is extremely easy to be burned by the heating wire.

The melamine resin porous material based on a heat-resistant polymer has a thermal decomposition temperature above 400°C, and a long-term use temperature can reach 200-240°C, which just covers the working temperature range of the electronic cigarette core. It decomposes slowly when the temperature exceeds 420°C, and the thermal decomposition products are harmless to the human body.

Compared with cotton, the application of the organic porous material provided by the present invention has the advantages of high saturated liquid absorption capacity, good shape retention after saturated liquid absorption, high temperature resistance, etc., which is conducive to better delivery of liquid e-liquid to the heating element.

Referring to Fig. 6, in addition to comparing the liquid-locking properties of ceramic porous materials and melamine resin porous materials (refer to Fig. 4), the present invention further compares the liquid-locking properties of absorbent cotton and melamine resin porous materials, and Fig. 6 is absorbent cotton mist Comparison of the appearance of the atomizing core (a) and the melamine resin porous material atomizing core (b) after saturated absorption of liquid e-liquid. After standing for 10 minutes, the smoke oil absorbed in the absorbent cotton atomizing core (a) has overflowed a lot, while the melamine resin porous material atomizing core (b) still maintains the appearance of the initial saturated adsorption, and almost no smoke oil overflows.

Referring to Fig. 7, the present invention has further studied the comparison between the absorbent cotton atomizing core (a) and the melamine resin porous material atomizing core (b) in liquid storage and anti-burning effect, and Fig. 7 is the comparison between the absorbent cotton atomizing core (a) and melamine Comparison of the liquid storage and anti-burning effect of the resin porous material atomizing core (b) and the absorbent cotton atomizing core (a) after saturated absorption of liquid e-liquid and the melamine resin porous material atomizing core (b) after heating for 8 seconds Appearance and appearance, heating conditions are 1.2 ohm heating wire and 3.7 volts. After 8 seconds of heating, remove the heating element and observe that the surface of the absorbent cotton has been partially burnt, while the appearance of the melamine resin porous body is complete. And since the volume is basically the same, the amount of smoke oil absorbed by the absorbent cotton is obviously lower than that of the melamine resin porous material, which also provides a favorable aspect for smooth oil supply and prevention of dry burning.

It should be noted that preferred embodiments of the present invention are provided in the description of the present invention and the accompanying drawings, but the present invention can be realized in many different forms, and are not limited to the embodiments described in the description. These embodiments are not intended as additional limitations on the content of the present invention, and the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Moreover, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the description of the present invention; further, for those of ordinary skill in the art, improvements or changes can be made according to the above description , and all these improvements and transformations should belong to the scope of protection of the appended claims of the present invention.

Claims (14)

1. The purposes of a kind of organic porous material in aerosol generating device, it is characterized in that, described aerosol generating device comprises heating element, and described organic porous material is used as guide liquid and contacts or is adjacent to described heating element, and described The organic porous material is at least partly a melamine resin porous material, and the pore size distribution of the organic porous material is such that the volume of pores with a pore size ranging from 10 nanometers to 100 micrometers exceeds 90%. 2. The use according to claim 1, characterized in that the apparent density of the organic porous material is (3-120)×10 ^-3 g/cm ³ . 3. The use according to claim 1, characterized in that the apparent density of the organic porous material is (4-12)×10 ^-3 g/cm ³ . 4. The use according to claim 1, characterized in that the 25% deformation compressive strength of the organic porous material is 5-30KPa. 5. The use according to claim 1, characterized in that the organic porous material has a decomposition temperature higher than 300°C. 6. The use according to claim 1, characterized in that the organic porous material has a decomposition temperature higher than 350°C. 7. The use according to claim 1, characterized in that the organic porous material has a decomposition temperature higher than 400°C. 8. The use according to claim 1, characterized in that the open porosity of the organic porous material is greater than 60%. 9. The use according to claim 1, characterized in that the pore size range distribution of the organic porous material is such that the volume of pores with a pore size range of 10 nanometers to 1 micron exceeds 90%. 10. The use according to claim 1, characterized in that the pore size range distribution of the organic porous material is such that the volume of pores with a pore size range of 10 nanometers to 100 nanometers exceeds 90%. 11. The use according to claim 1, characterized in that the pore size range distribution of the organic porous material is such that the volume of pores with a pore size range of 10 nanometers to 50 nanometers exceeds 90%. 12. The use according to any one of claims 1-11, characterized in that other porous materials are included between the organic porous material and the heating element. 13. An atomizer for an aerosol generating device, comprising: A housing; a liquid storage bin for storing atomized liquid is formed in the housing, and the liquid storage bin includes an outlet; an aerosol channel extending along the longitudinal direction of the housing is formed in the housing, and the aerosol channel includes an inlet and an air outlet, the air outlet being located at one end of the housing; An atomizing core, the atomizing core is accommodated in the shell, the outlet of the liquid storage chamber communicates with the liquid-absorbing surface of the atomizing core; the atomizing surface of the atomizing core communicates with the aerosol channel, and its characteristics That is, the atomizing core includes an organic porous material, the organic porous material is at least partly a melamine resin porous material, and the pore diameter range of the organic porous material is distributed such that the volume of pores with a pore diameter ranging from 10 nanometers to 100 microns exceeds 90%; a fixing piece, used for fixing the atomizing core and the shell; A heating element, the heating element is in contact with or adjacent to the atomizing surface; and The electrodes are used to electrically connect the heating element and allow the heating element to receive electric power. 14. The atomizer according to claim 13, wherein the atomizing core comprises porous ceramic and melamine resin porous material, One of the surfaces of the porous ceramic forms the atomization surface, and one of the surfaces of the porous melamine resin material forms the liquid absorption surface, The melamine resin porous material at least partially covers the porous ceramics, so that the atomized liquid enters the atomizing core through the liquid-absorbing surface, and conducts to the atomizing surface.

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