Heating component, atomizer and electronic atomization device

Abstract

The present invention discloses a heating component, an atomizer, and an electronic atomization device. The heating component includes a porous matrix for absorbing liquid medium and a heating element located on the atomization surface of the porous matrix for heating and atomizing the liquid medium adsorbed in the porous matrix; the minimum spacing value L1 between the edge of the heating element and the edge of the atomization surface is set so that the side temperature of the porous matrix in the working state of the heating element is less than 105°; the ratio of the minimum spacing value L1 between the edge of the heating element and the edge of the atomization surface to the minimum width value L2 of the atomization surface is greater than 15.6%. With such a design, when the heating element is heated, on the one hand, the temperature of the side of the porous matrix is ​​reduced, thereby avoiding the problem of deformation of the heating seat on the side of the porous matrix due to excessive temperature, thereby causing poor ventilation; on the other hand, the amount of smoke generated by the heating component is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic atomizers, and in particular to a heating component, an atomizer and an electronic atomization device. Background Art

[0002] An electronic atomizer is a device that atomizes an aerosol-generating substrate into an aerosol. It is widely used in medical devices and electronic atomization devices. An electronic atomizer primarily consists of a ceramic heating element that heats the atomized tobacco liquid when powered. The ceramic heating element consists of a porous ceramic substrate for conducting the liquid and a heating film mounted on the atomizing surface of the porous ceramic substrate.

[0003] In the prior art, in order to increase the amount of smoke generated by ceramic heating elements, the front temperature of the ceramic heating element is generally increased by increasing the heating power of the heating film. This will cause the temperature of the side of the ceramic heating element to be too high, which may easily cause the heating seat on the side of the ceramic heating element to deform, and then cause problems such as poor ventilation. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the side temperature of the ceramic heating element is too high, which easily causes the heating seat to deform and thus causes poor ventilation, thereby providing a component, an atomizer and an electronic atomization device.

[0005] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0006] A heating component comprises a porous matrix for absorbing liquid medium and a heating element located on an atomizing surface of the porous matrix for heating and atomizing the liquid medium adsorbed in the porous matrix; a minimum spacing value L1 between the edge of the heating element and the edge of the atomizing surface is set so that the side temperature of the porous matrix is ​​less than 105° when the heating element is in a working state.

[0007] In some embodiments, a ratio of a minimum distance L1 between an edge of the heating element and an edge of the atomizing surface to a minimum width L2 of the atomizing surface is greater than 15.6%.

[0008] In some embodiments, the ratio of the minimum distance L1 between the edge of the heating element and the edge of the atomizing surface to the minimum width L2 of the atomizing surface is between 15.6% and 21.9%, and the ratio of the length L3 of the heating element to the total length L4 of the heating element is less than 20%.

[0009] In some embodiments, the porous matrix is ​​a cuboid.

[0010] In some embodiments, the minimum distance value L1 is greater than 0.4 mm.

[0011] In some embodiments, the temperature of the heating element in a working state is greater than 200°C.

[0012] In some embodiments, the thermal conductivity of the porous matrix is ​​in the range of 0.8-2 W / mK.

[0013] In some embodiments, the heating element is symmetrically arranged relative to the center point of the atomizing surface.

[0014] In some embodiments, the first electrode and the second electrode located on the atomizing surface are connected to both ends of the heating element, and the first electrode and the second electrode are located at both ends of the longitudinal direction of the atomizing surface.

[0015] In some embodiments, the atomization surface includes a core atomization area and an edge atomization area located outside the core atomization area, and the edge atomization area is located within the area defined by the first electrode and the second electrode; the distribution density of the heating element in the core atomization area is greater than the distribution density in the edge atomization area.

[0016] In some embodiments, the heating element includes a first connecting segment connected to the first electrode, a second connecting segment connected to the second electrode, and an intermediate bent connecting segment connecting the first connecting segment and the second connecting segment in series, and the edge of the intermediate bent connecting segment is arranged close to the edge of the core atomization area.

[0017] In some embodiments, the edge of the connecting segment is disposed adjacent to the edge of the core atomization region.

[0018] In some embodiments, 40-90% of the heating element is distributed within the core atomization area.

[0019] The present invention further provides an atomizer comprising a heating component as described above, a liquid storage chamber for storing a liquid medium, and an atomizer seat having a liquid guide channel connecting the liquid storage chamber and the heating component.

[0020] The present invention further provides an electronic atomization device, comprising a power supply device and the atomizer as described above, wherein the power supply device is electrically connected to the atomizer.

[0021] The technical solution of the present invention has at least the following advantages: the ratio of the minimum spacing value L1 between the edge of the heating element and the edge of the atomizing surface to the minimum width value L2 of the atomizing surface is greater than 15.6%. When the heating element is heated, on the one hand, the temperature of the side of the porous matrix is ​​reduced, thereby avoiding the problem of deformation of the heating seat on the side of the porous matrix due to excessive temperature, thereby causing poor ventilation; on the other hand, the amount of smoke generated by the heating component is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the structure of the heating component before improvement in the prior art;

[0024] Figure 2 This is a schematic structural diagram of an improved heating component according to an embodiment of the present invention;

[0025] Figure 3 To improve the temperature comparison chart of the front and rear heating components;

[0026] Figure 4 To improve the comparison of the amount of smoke produced by the heating components before and after;

[0027] Figure 5 A cross-sectional view of an atomizer provided in an embodiment of the present invention;

[0028] Figure 6 A schematic structural diagram of an electronic atomization device provided in an embodiment of the present invention.

[0029] Explanation of the accompanying symbols: 1. porous matrix; 11. atomizing surface; 2. heating element; 3. first electrode; 4. second electrode; 5. shell; 51. liquid storage chamber; 6. liquid guide seat; 61. liquid guide channel; 7. power supply device. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] like Figure 1 and Figure 2 A heating component is shown, wherein Figure 1 In order to improve the structural diagram of the heating component in the prior art, Figure 2 This is a schematic diagram of the structure of the improved heating component of the present invention. The heating component can be used in an atomizer to heat and atomize liquid media such as smoke liquid and liquid medicine. It may include a porous matrix 1 for absorbing the liquid medium and a heating element 2 for heating and atomizing the liquid medium adsorbed into the porous matrix 1. The porous matrix 1 includes a first surface and a second surface that are arranged opposite to each other. The first surface is an atomizing surface 11 for mounting the heating element 2, and the second surface is a liquid absorption surface for absorbing liquid media such as smoke liquid and liquid medicine. After being absorbed on the liquid absorption surface side of the porous matrix 1, the liquid medium penetrates toward the atomizing surface 11 side of the porous matrix 1.

[0035] In this embodiment, the porous substrate 1 is in the shape of a rectangular parallelepiped, and the atomizing surface 11 is formed on the rectangular surface of the porous substrate 1. In other embodiments, the atomizing surface 11 on the porous substrate 1 can also be in other shapes such as circular, elliptical, diamond, square, etc. The porous substrate 1 can be made of a hard capillary structure such as porous ceramics, porous glass ceramics, porous glass, etc. Preferably, the porous substrate 1 is made of porous ceramics. Porous ceramics are resistant to high temperatures and have stable chemical properties. They will not react chemically with the smoke liquid. In addition, porous ceramics are insulators and will not be electrically connected to the heating element 2 provided thereon to cause problems such as short circuits. They are easy to manufacture and have low costs.

[0036] In some embodiments, the pores of the porous ceramic may have a pore size ranging from 1 μm to 100 μm. The average pore size of the porous ceramic may be 10-35 μm. Preferably, the average pore size of the porous ceramic is 20-25 μm.

[0037] Preferably, the volume of micropores with a pore size of 5μm to 30μm on the porous ceramic accounts for more than 60% of the volume of all micropores on the porous ceramic. The volume of micropores with a pore size of 10-15μm in the porous ceramic accounts for more than 20% of the volume of all micropores on the porous ceramic, and the volume of micropores with a pore size of 30-50μm in the porous ceramic accounts for about 30% of the volume of all micropores on the porous ceramic. The porosity of porous ceramics can be 30% to 70%. Porosity refers to the ratio of the total volume of tiny voids within a porous medium to the total volume of the porous medium. The porosity can be adjusted according to the composition of the smoke liquid. For example, if the viscosity of the smoke liquid is high, the porosity can be higher to ensure the liquid conduction effect. Preferably, the porosity of the porous ceramic is 50-60%.

[0038] The atomizing surface 11 may generally include a core atomizing area and an edge atomizing area outside the core atomizing area, and the core atomizing area may generally be located at the center of the atomizing surface 11. After the liquid medium penetrates from the liquid absorption surface side of the porous matrix 1 to the atomizing surface 11 side, the area where the liquid medium content is concentrated per unit area on the atomizing surface 11 is the core atomizing area, and the area where the liquid medium content is dispersed per unit area is the edge atomizing area; generally speaking, the edge atomizing area is formed by the liquid medium in the core atomizing area diffusing outward. When the heating component is heated, because the temperature of the core atomizing area is higher and the liquid medium evaporates faster, part of the liquid medium in the edge atomizing area will also flow to the core atomizing area and gather in the core atomizing area. Therefore, the edge atomizing area will be limited to a certain range, thereby avoiding leakage. The user will not inhale droplets when inhaling the mist, thereby improving the user experience.

[0039] Typically, the extension direction of the heating element 2 is consistent with the length direction of the atomized surface 11 on the porous substrate 1, and the distribution density of the heating element 2 in the core atomized region is greater than the distribution density in the edge atomized region outside the core atomized region. In some embodiments, the distribution density can be the ratio of the area occupied by the heating element 2 in the core atomized region (or edge atomized region) to the area of ​​the core atomized region (or edge atomized region). Typically, 40-90% of the heating element 2 is distributed in the core atomized region.

[0040] The two ends of the heating element 2 may be provided with a first electrode 3 and a second electrode 4, respectively, and the first electrode 3 and the second electrode 4 are used to electrically connect to the positive and negative poles of the battery device, respectively. Usually, the edge atomization area is located in the space defined by the first electrode 3 and the second electrode 4. In some embodiments, the first electrode 3 and the second electrode 4 are arranged in the middle position of the two ends of the heating element 2. In other embodiments, when the heating component is a side air intake, the first electrode 3 and the second electrode 4 may be respectively arranged on the diagonal corners of the atomization surface 11 to optimize the smoke delivery effect during side air intake, effectively prevent the first electrode 3 and the second electrode 4 from obstructing the airflow, avoid smoke from being retained in the atomization chamber, and improve the smoke flow efficiency.

[0041] The heating element 2 can be a heating film or a heating wire, and its material can be metal. The heating element 2 can be provided with solder pads for mounting the first electrode 3 and the second electrode 4 at both ends. Preferably, the heating element 2 is a heating film, which can be printed on the atomized surface 11 of the porous substrate 1 using electronic paste. When the porous substrate 1 is a sintered structure, the heating element 2 can be integrally formed with the porous substrate 1 by sintering.

[0042] In some embodiments, the heating film may include a first covering film and a second covering film sequentially formed on the atomizing surface 11. Both the first covering film and the second covering film may be porous films. The material of the first covering film may be titanium, zirconium, titanium-aluminum alloy, titanium-zirconium alloy, titanium-molybdenum alloy, titanium-niobium alloy, iron-aluminum alloy or tantalum-aluminum alloy, etc., and the material of the second covering film may be platinum, palladium, palladium-copper alloy, gold-silver-platinum alloy, gold-silver alloy, palladium-silver alloy or gold-platinum alloy, etc. Preferably, the first covering film is a titanium-zirconium alloy film, and the second covering film is a gold-silver alloy film.

[0043] The heating element 2 can be symmetrically arranged relative to the center point of the atomized surface 11. In this embodiment, the thermal conductivity of the porous substrate 1 is in the range of 0.8-2 W / mk; and the atomized surface 11 is substantially rectangular.

[0044] In some embodiments, the heating element 2 includes a first connecting segment connected to the first electrode 3, a second connecting segment connected to the second electrode 4, and an intermediate bent connecting segment connecting the first connecting segment and the second connecting segment in series, wherein the edge of the intermediate bent connecting segment is arranged near the edge of the core atomization area. The shape of the heating element 2 can be configured so that the area required to be heated per unit length of the heating element 2 in the core atomization area is substantially the same, thereby avoiding excessively high local temperatures of the porous matrix 1, reducing the thermal stress between the heating element 2 and the porous matrix 1, and reducing the deformation of the heating element 2 and the porous matrix 1.

[0045] In this embodiment, the ratio of the minimum spacing value L1 between the edge of the heating element 2 and the edge of the atomized surface 11 to the minimum width value (first width) L2 of the atomized surface 11 is greater than 15.6%. For example, when the minimum width value L2 of the atomized surface 11 is 3.2mm, the minimum spacing value L1 between the edge of the heating element 2 and the edge of the atomized surface 11 is greater than 0.5mm, such as L1 is 0.62mm. Preferably, the ratio of the length L3 of the portion of the heating element 2 where the ratio of the minimum spacing value L1 between the edge of the heating element 2 and the edge of the atomized surface 11 to the minimum width value L2 of the atomized surface 11 is between 15.6% and 21.9% to the total length L4 of the heating element 2 is less than 20%. For example, when the minimum width value L2 of the atomized surface 11 is 3.2mm, the ratio of the length L3 of the portion of the heating element 2 where the distance between the edge of the heating element 2 and the edge of the atomized surface 11 is less than 0.7mm to the total length L4 of the heating element 2 is less than 20%. With such arrangement, when the heating element 2 is heated, on the one hand, the temperature of the side of the porous matrix 1 is reduced, thereby avoiding the problem of deformation of the heating seat on the side of the porous matrix 1 due to excessive temperature, thereby causing poor ventilation; on the other hand, the amount of smoke generated by the heating component is increased.

[0046] Figure 3 Shown Figure 1 、 Figure 2 The side temperature comparison diagram of the heating component shown, Figure 4 Shown Figure 1 、 Figure 2 Comparison of smoke production of the heating components shown. Figure 3 The improvement scheme shown by the thin line is Figure 2 Schematic diagram of the side temperature of the heating component. The original solution shown by the bold line is Figure 1 Schematic diagram of the side temperature of the heating component, from Figure 3 It can be clearly concluded that the maximum temperature on the side of the heating component in the improved solution is reduced by about 18°C ​​compared with the maximum temperature on the side of the heating component in the original solution. Figure 4 In the figure, the bold box shows the smoke production of the improved solution at 7.5W or 8.5W and different puff numbers, and the semi-bold box shows the smoke production of the original solution at 7.5W or 8.5W and different puff numbers. Figure 4 It can be clearly seen that when the heating power is 7.5 watts or 8.5 watts, the smoke production of the improved solution increases by about 0.5 mg / puff compared to the original solution.

[0047] For details, please refer to the following chart (wherein the minimum width L2 of the porous matrix is ​​3.2 mm):

[0048]

[0049]

[0050] According to the table above, when the porous substrate 1 has a high thermal conductivity (0.8-2 W / mk), the minimum distance between the sides of the heating membrane's porous substrate is limited to a minimum spacing value (L1) greater than 0.5 mm between the edge of the heating membrane and the edge of the atomizing surface 11. The heating power is 8.5 W, the smoke volume is 6-6.5 mg / puff, and the side temperature is less than 109°C. The length of the heating membrane and the side of the porous substrate 1 less than 0.7 mm accounts for less than 20% of the total length of the heating membrane.

[0051] An embodiment of the present invention further provides an electronic atomization device, which can be used as an electronic cigarette, a medical atomizer, etc.

[0052] The electronic atomization device may include an atomizer and a battery device 7, wherein the battery device 7 is electrically connected to the atomizer. In some embodiments, the atomizer and the battery device may be connected together in a detachable manner such as magnetic attraction or screw connection.

[0053] The atomizer may include a liquid storage chamber for accommodating a liquid medium, a heating component, and an atomizer seat connecting the liquid storage chamber and the heating component. After the atomizer and the power supply device 7 are assembled, the power supply device 7 supplies power to the heating element 2 of the heating component in the atomizer. After the heating element 2 generates heat, it heats the liquid medium and atomizes it for the user to inhale. It can be understood that any of the above-mentioned heating elements 2 can be applied to the electronic atomizer device. In some embodiments, the atomizer may also include a shell 5 for accommodating a liquid medium. The shell 5 is specifically a shell with an open end at one end and a liquid storage chamber 51 inside. The open end of the shell 5 is sealedly connected to the atomizer seat 6, and the atomizer seat 6 is provided with an atomizer chamber inside. The heating component is installed on the atomizer seat 6, and the atomizer seat 6 is provided with a liquid guide channel 61 for the liquid in the liquid storage chamber 51 to flow to the liquid absorption surface of the porous matrix 1. The closed end of the housing 7 is connected to an air duct extending into the liquid storage chamber 51 and connected to the atomizer seat 6. The atomizer seat 6 is also provided with an atomizing gas channel (not shown) connecting the air duct and the atomizing chamber. The atomizing surface 11 of the porous substrate 1 is in communication with the atomizing chamber 3. The heating element 2 generates smoke in the atomizing chamber. The smoke is introduced into the air duct through the atomizing gas channel. The air duct is used to direct the smoke through the smoke outlet on the housing 7 to the user's mouth.

[0054] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A heating component comprising a porous substrate (1) for absorbing a liquid medium and a heating element (2) located on an atomizing surface (11) of the porous substrate (1) for heating and atomizing the liquid medium absorbed in the porous substrate (1); characterized in that: Setting a minimum spacing value L1 between the edge of the heating element (2) and the edge of the atomizing surface (11) so that the side temperature of the porous substrate (1) is less than 105° when the heating element (2) is in a working state; The ratio of the minimum distance value L1 between the edge of the heating element (2) and the edge of the atomizing surface (11) to the minimum width value L2 of the atomizing surface (11) is greater than 15.6%; The ratio of the minimum spacing value L1 between the edge of the heating element (2) and the edge of the atomizing surface (11) to the minimum width value L2 of the atomizing surface (11) is between 15.6% and 21.9%, and the ratio between the length L3 of the heating element (2) and the total length L4 of the heating element (2) is less than 20%.

2. The heating component according to claim 1, characterized in that The porous matrix (1) is a cuboid.

3. The heating component according to claim 1, characterized in that The minimum spacing value L1 is greater than 0.4 mm.

4. The heating component according to claim 1, characterized in that The temperature of the heating element (2) in a working state is greater than 200°C.

5. The heating component according to claim 1, characterized in that The thermal conductivity of the porous matrix (1) is in the range of 0.8-2 W / mk.

6. The heating component according to claim 1, characterized in that The heating element (2) is symmetrically arranged relative to the center point of the atomizing surface (11).

7. The heating component according to claim 1, characterized in that The heating element (2) is connected to a first electrode (3) and a second electrode (4) located on the atomizing surface (11) at both ends, and the first electrode (3) and the second electrode (4) are located at both ends of the atomizing surface (11) in the longitudinal direction.

8. The heating component according to claim 7, characterized in that: The atomizing surface (11) comprises a core atomizing region and an edge atomizing region located outside the core atomizing region, wherein the edge atomizing region is located within a region defined by the first electrode (3) and the second electrode (4); and the distribution density of the heating element (2) in the core atomizing region is greater than the distribution density in the edge atomizing region.

9. The heating component according to claim 8, characterized in that: The heating element (2) comprises a first connecting segment connected to the first electrode (3), a second connecting segment connected to the second electrode (4), and an intermediate bent connecting segment connecting the first connecting segment and the second connecting segment in series, wherein an edge of the intermediate bent connecting segment is arranged close to an edge of the core atomization area.

10. The heating component according to claim 8, characterized in that: 40-90% of the heating element (2) is distributed in the core atomization area.

11. An atomizer, characterized in that: The atomizer comprises a heating component according to any one of claims 1 to 10, a liquid storage cavity for storing a liquid medium, and an atomizer seat having a liquid guide channel connecting the liquid storage cavity and the heating component.

12. An electronic atomization device, characterized in that: The invention comprises a power supply device and the atomizer according to claim 11, wherein the power supply device is electrically connected to the atomizer.

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