CN219288762U - Aerosol generating device and heating structure thereof - Google Patents
Aerosol generating device and heating structure thereof Download PDFInfo
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- CN219288762U CN219288762U CN202223167782.7U CN202223167782U CN219288762U CN 219288762 U CN219288762 U CN 219288762U CN 202223167782 U CN202223167782 U CN 202223167782U CN 219288762 U CN219288762 U CN 219288762U
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Abstract
The utility model discloses an aerosol generating device and a heating structure thereof, wherein the heating structure comprises: an inner tube, a heat exchanger and an intermediate tube; the intermediate pipe is provided with a first air inlet channel, the heat exchanger is provided with a second air inlet channel, the second air inlet channel comprises an intermediate air inlet channel and a peripheral air inlet channel, the peripheral air inlet channel surrounds the peripheral outer side of the intermediate air inlet channel, and the inner pipe is provided with a third air inlet channel. The second cross section area of the second air inlet channel is set to be larger, so that the speed of air flow is reduced, and the heating time of air in the second air inlet channel is further prolonged; the first cross section area of the first air inlet channel is relatively smaller, so that the flow limiting effect can be achieved, and the flow acceleration of air in the second air inlet channel caused by overlarge air flow is prevented; the third cross-sectional area of the third air inlet channel is relatively smaller, so that air heated in the second air inlet channel can permeate into a deeper position of the aerosol-forming substrate, and heating efficiency of the aerosol-forming substrate is improved.
Description
Technical Field
The utility model relates to the technical field of aerosol generating devices, in particular to an aerosol generating device and a heating structure thereof.
Background
The heating of non-combustible cigarettes is an important new type of tobacco product, which can heat tobacco materials through an external heat source without directly burning cigarettes, and generate smoke so as to enable smokers to achieve the physiologically satisfied smoking effect. Compared with the traditional cigarettes, the heating non-burning cigarettes have no burning process, do not generate harmful substances such as tar, carbon monoxide and the like, and greatly reduce the harm of smoking to consumers and surrounding people.
Heating the non-combustible aerosol-forming substrate requires heating by means of an aerosol-generating device and inhalation of air to heat the aerosol-forming substrate.
The air inlet channel arranged by the prior aerosol generating device is single, and the influence of the temperature and the flow rate of the air flow on the aerosol forming substrate is not considered, so that the heating efficiency is common.
Disclosure of Invention
The utility model provides an aerosol generating device and a heating structure thereof, which are mainly used for solving the general problem of air heating efficiency.
According to a first aspect, in one embodiment, there is provided a heating structure of an aerosol-generating device comprising: the heat exchanger comprises an inner pipe, a heat exchanger and a middle pipe, wherein the inner pipe and the heat exchanger are positioned in the middle pipe;
the inner tube is provided with a containing cavity, the inner tube is provided with a first end and a second end, the first end of the inner tube is provided with an opening, the opening is used for being inserted with aerosol generating matrixes, and the heat exchanger is arranged at the second end of the inner tube;
the middle pipe is provided with a first end and a second end, the second end of the middle pipe is provided with a first air inlet channel, the heat exchanger is provided with a second air inlet channel, the second air inlet channel comprises a middle air inlet channel and a peripheral air inlet channel, the peripheral air inlet channel surrounds the peripheral outer side of the middle air inlet channel, the second end of the inner pipe is provided with a third air inlet channel, the first air inlet channel, the second air inlet channel, the third air inlet channel and the accommodating cavity are sequentially communicated, and the first air inlet channel is used for introducing outside air into the second air inlet channel; the first air inlet passage has a first cross-sectional area, the second air inlet passage has a second cross-sectional area, and the third air inlet passage has a third cross-sectional area; the second cross-sectional area is greater than the first cross-sectional area and the second cross-sectional area is greater than the third cross-sectional area.
In one embodiment, the peripheral side access channel comprises one or more helical channels.
In one embodiment, the length of the peripheral side air passage is greater than the length of the intermediate air passage, and the cross-sectional area of the peripheral side air passage is smaller than the cross-sectional area of the intermediate air passage.
In one embodiment, a second end of the inner tube is provided with a partition plate, and the partition plate is provided with the third air inlet channel; the heat exchanger comprises an inner cylinder and an outer cylinder, wherein the outer cylinder is sleeved on the outer side of the inner cylinder, the inner cylinder is internally provided with the middle air inlet channel, and the peripheral side air inlet channel is formed between the outer cylinder and the inner cylinder.
In one embodiment, the middle part of the partition plate is provided with an avoidance hole, one end of the inner cylinder is provided with a protruding part, the protruding part is positioned in the avoidance hole, and the middle air inlet channel passes through the protruding part and is communicated with the accommodating cavity.
In one embodiment, the first, second and third intake passages each comprise one or more passages, and the first, second and third cross-sectional areas are each the sum of the cross-sectional areas of the one or more passages.
In one embodiment, the second cross-sectional area is less than 40 square millimeters; and/or the first cross-sectional area is greater than 0.2 square millimeters and less than 5 square millimeters and the third cross-sectional area is greater than 0.2 square millimeters and less than 5 square millimeters.
In one embodiment, the length of the second intake passage is greater than the length of the first intake passage, and/or the length of the second intake passage is greater than the length of the third intake passage.
In one embodiment, the device further comprises an outer tube, the outer tube is sleeved on the outer side of the middle tube, the outer tube is provided with a first end and a second end, the first end of the outer tube is connected with the middle tube and the inner tube through an upper end cover, and the second end of the outer tube is connected with the second end of the inner tube.
According to a second aspect, an embodiment provides an aerosol-generating device comprising the heating structure of the aerosol-generating device described above.
According to the aerosol generating device of the embodiment, the air inlet channel is divided into the three-section structure by the heating structure, and the second cross-sectional area of the second air inlet channel of the middle section is set to be larger, so that the speed of air flow is reduced, the heating time of air in the second air inlet channel is further improved, the air with higher temperature can enter the aerosol forming substrate, and the heating efficiency of the aerosol forming substrate is improved; the first cross section area of the first air inlet channel is smaller than the second cross section area, so that the flow restriction effect can be achieved, and the flow acceleration of air in the second air inlet channel caused by overlarge air flow is prevented; the third cross-sectional area of the third air inlet channel is smaller than the second cross-sectional area, so that air heated in the second air inlet channel can permeate into a deeper position of the aerosol-forming substrate, and the heating efficiency of the aerosol-forming substrate is improved; and the second air inlet channel is arranged as a middle air inlet channel and a peripheral air inlet channel, so that the inlet air can be split, the flow speed of the air is further reduced, and the heating efficiency of the air is improved.
Drawings
FIG. 1 is an axial cross-sectional view of a heating structure in one embodiment;
FIG. 2 is a structural view of a heat exchanger in one embodiment;
FIG. 3 is a structural view of a heat exchanger in one embodiment;
FIG. 4 is a structural view of an inner barrel of a heat exchanger in one embodiment;
wherein the reference numerals are as follows:
1-an inner tube, 11-a baffle plate and 12-an accommodating cavity;
2-middle pipe, 21-baffle;
3-an outer tube, 31-an upper end cover;
4-heat exchanger, 41-inner cylinder, 411-protruding part, 42-outer cylinder;
5-heating body;
6-aerosol-forming substrate;
a-first air intake passage, B-second air intake passage, B1-intermediate air intake passage, B2-peripheral air intake passage, C-third air intake passage.
Detailed Description
The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated.
In one embodiment, a heating structure of a sol generating device is provided, where the heating structure is provided with a containing cavity and an air inlet channel, the containing cavity is used for inserting an aerosol forming substrate, the air inlet channel is communicated with the containing cavity, the air inlet channel is used for introducing air into the aerosol forming substrate in the containing cavity, the air is heated in the air inlet channel, and the heated air enters the aerosol forming substrate to heat the aerosol forming substrate, so that the aerosol forming substrate generates aerosol.
The receiving cavity has a first end and a second end, the first end of the receiving cavity being provided with an opening into which an aerosol-forming substrate may be inserted from the opening of the receiving cavity.
The air inlet channel comprises a first air inlet channel, a second air inlet channel and a third air inlet channel which are sequentially communicated, the accommodating cavity, the third air inlet channel, the second air inlet channel and the first air inlet channel are sequentially arranged, one end of the first air inlet channel, which is far away from the second air inlet channel, is provided with an air inlet, the air inlet is used for introducing air into the air inlet channel, one end of the third air inlet channel, which is far away from the second air inlet channel, is communicated with the second end of the accommodating cavity, so that air heated by the air inlet channel can enter an aerosol forming matrix of the accommodating cavity.
The first air inlet channel, the second air inlet channel and the third air inlet channel can be one or more channels, and the first air inlet channel, the second air inlet channel and the third air inlet channel can have the same number of air inlet channels or different numbers of air inlet channels; for example, the first intake passage has three passages, the second intake passage has two passages, and the third intake passage has three passages. The first air inlet channel, the second air inlet channel and the third air inlet channel can be in one-to-one correspondence with one channel, or can be in corresponding communication with a plurality of channels, and can be used for transmitting air into the accommodating cavity.
Transition passages may be provided between the first, second, and third intake passages so that one passage can communicate with a plurality of passages at the same time. A first transition channel is arranged between the first air inlet channel and the second air inlet channel, and the first air inlet channel and the second air inlet channel are communicated through the first transition channel, for example, the first air inlet channels of the two channels can be communicated with the second air inlet channels of the nine channels. A second transition channel is arranged between the second air inlet channel and the third air inlet channel, and the second air inlet channel and the third air inlet channel are communicated through the second transition channel, for example, nine identical second air inlet channels can be communicated with the third air inlet channels of the three channels.
In other embodiments, some of the first and second intake passages are communicated through a first transition passage, and other passages may be directly communicated; likewise, some of the second and third intake passages may communicate through a second transition passage, and other passages may communicate directly.
In this embodiment, the first air inlet channel has a first cross-sectional area S1, and the first cross-sectional area S1 is the sum of the cross-sectional areas of all channels included in the first air inlet channel; the second air inlet channel has a second cross-sectional area S2, and the second cross-sectional area S2 is the sum of cross-sectional areas of all channels contained in the second air inlet channel; the third intake passage has a third cross-sectional area S3, the third cross-sectional area S3 being the sum of the cross-sectional areas of all the passages contained in the third intake passage. Wherein the second cross-sectional area S2 is larger, the second cross-sectional area S2 is larger than the first cross-sectional area S1 and the third air intake channel S3, respectively, i.e. S2 > S1, and S2 is larger than S3.
A heating body such as an electromagnetic coil, a resistor sheet and the like can be arranged on the circumferential outer side of the second air inlet channel, and the heating body is used for heating air passing through the second air inlet channel. The heating body may be provided on the outer side in the circumferential direction of the second air intake passage, or between the plurality of second air intake passages, and the air in the second air intake passage may be heated as well.
According to the formula q=s1×v1=s2×v2 in fluid mechanics: q represents the flow rate of the fluid, S represents the cross-sectional area of the pipeline, and V represents the flow rate. When air enters a pipeline with a small cross-sectional area, the cross-sectional area S1 becomes smaller, and the flow velocity V1 becomes larger; when flowing through a large cross-sectional area conduit, the cross-sectional area S2 becomes large and the flow velocity V2 becomes small. The speed becomes smaller and the time for flowing through the same path length becomes longer, i.e. the time for which the flowing gas is heated becomes longer.
Therefore, the second cross-sectional area S2 of the second air inlet channel is larger than the first cross-sectional area S1 and the third air inlet channel S3, so that the flow speed of air in the second air inlet channel is reduced, the air can be heated in the second air inlet channel for a longer time, the temperature of the air is improved, and the efficiency of heating the aerosol forming substrate is improved.
In other embodiments, the length of the second intake passage is set longer, such as the length of the second intake passage is greater than the length of the first intake passage, and the length of the second intake passage is greater than the length of the third intake passage; the length of the second air inlet channel is longer, so that the heating time of air in the second air inlet channel can be prolonged, the temperature of the air can be increased, and the efficiency of heating the aerosol forming substrate can be improved.
In this embodiment, the first cross-sectional area S1 of the first air intake channel is smaller than the second cross-sectional area S2 of the second air intake channel, so that the first air intake channel can perform flow restriction, and the suction resistance during suction is controlled, so that the air is prevented from flowing too fast after entering the second air intake channel due to too large flow, and insufficient air heating is further caused. That is, the first cross-sectional area S1 of the first air inlet channel is smaller, so that the flow rate of air entering the second air inlet channel can be limited, the air can flow in the second air inlet channel at a low speed, and the heating time of the air can be ensured.
The third cross-sectional area S3 of the third air intake passage is smaller than the second cross-sectional area S2 of the second air intake passage, and after the air flows from the second air intake passage to the third air intake passage, the passage becomes narrower, and acceleration of the air is achieved. That is, the third air inlet channel with smaller third cross-sectional area S3 can accelerate air, so that air with higher speed can permeate into the position deeper than the aerosol-forming substrate, energy carried by air can penetrate through the aerosol-forming substrate, and heating efficiency of the aerosol-forming substrate is improved.
The cross sections of the first air inlet channel, the second air inlet channel and the third air inlet channel can be in any shape such as a round shape, a rectangular shape or a triangular shape.
The first air inlet channel and the third air inlet channel are of straight channel structures in the length direction, the second air inlet channel can be one or more of straight channels, spiral channels and special-shaped channels in the length direction, and the special-shaped channels can be non-straight channels such as S-shaped channels and L-shaped channels and other channels of non-spiral channels. For example, the second intake passage includes one straight passage and nine spiral passages wound around the outer side of the straight passage in the circumferential direction; wherein the straight channel has a larger cross-sectional area, which reduces the flow rate of air, and the spiral channel has a smaller cross-sectional area, but a longer channel length, which also reduces the flow rate of air.
In one embodiment, the second cross-sectional area S2 is less than 40 square millimeters, the first cross-sectional area S1 is greater than 0.2 square millimeters and less than 5 square millimeters, the third cross-sectional area S3 is greater than 0.2 square millimeters and less than 5 square millimeters, and the cross-sectional areas of the first air inlet channel, the second air inlet channel and the third air inlet channel can be set according to the use requirement to achieve better heating efficiency, for example, the third air inlet channel comprises three channels, the cross-sectional area of the middle air inlet channel is 0.9mm, and the cross-sectional area of the peripheral air inlet channel is 1.0mm.
The utility model will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, some operations associated with the present application have not been shown or described in the specification to avoid obscuring the core portions of the present application, and may not be necessary for a person skilled in the art to describe in detail the relevant operations based on the description herein and the general knowledge of one skilled in the art.
Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.
Embodiment one:
referring to fig. 1 to 4, the present embodiment provides a heating structure of an aerosol generating device, which includes an inner tube 1, an intermediate tube 2, an outer tube 3, a heat exchanger 4 and a heating body 5. The inner tube 1, the intermediate tube 2, the outer tube 3 and the heat exchanger 4 each have a first end, which is the upper end in fig. 1 (the end closer to the user's intake), and a second end, which is the lower end in fig. 1 (the end farther from the user's intake).
The second end of the inner tube 1 is provided with a baffle 11, the baffle 11 divides the upper part of the inner tube 1 into a containing cavity 12, the containing cavity 12 of the inner tube 1 is a containing cavity 12 of a heating structure, the first end of the inner tube 1 is provided with an opening, the opening is communicated with the upper end of the containing cavity 12, and the opening is used for inserting aerosol forming substrates 6 into the containing cavity 12. The accommodating chamber 12 is provided with a third air inlet channel C, which may be three straight hole channels.
The heat exchanger 4 is arranged at the second end of the inner tube 1, a second air inlet channel B is arranged in the heat exchanger 4, the second air inlet channel B comprises a middle air inlet channel B1 and a peripheral air inlet channel B2, the middle air inlet channel B1 and the peripheral air inlet channel B2 belong to two different channels, and the middle air inlet channel B1 is a straight hole channel and has a larger aperture; the peripheral side air channel B2 is a spiral channel with a longer pore length. The heat exchanger 4 is used for heating air passing through the second air inlet channel B, and the upper end of the second air inlet channel B is in butt joint communication with the third air inlet channel C.
The heat exchanger 4 comprises an inner cylinder 41 and an outer cylinder 42, the inner cylinder 41 is of an inverted cup-shaped structure, a straight hole channel with a large aperture is formed in the inner cylinder 41, the straight hole channel is a middle air inlet channel B1, a columnar protruding portion 411 is formed in the upper end of the inner cylinder 41, an avoidance hole is formed in the middle of the partition plate 11, the protruding portion 411 can be connected with the avoidance hole of the partition plate 11 in a threaded connection mode, and the middle air inlet channel B1 is directly extended to be communicated with the accommodating cavity 12. The outer wall of the inner cylinder 41 is provided with a thread groove, the outer cylinder 42 is of a cylindrical structure, the inner cylinder 41 is sleeved outside the outer cylinder 42, eight spiral channels are formed between the inner cylinder 41 and the outer cylinder 42, the eight spiral channels are circumferential side air inlet channels B2, and the upper end of the circumferential side air inlet channels B2 are communicated with a third air inlet channel C on the partition plate 11. Namely, the second intake passage B includes one intermediate intake passage B1 and eight peripheral-side intake passages B2.
The aperture (cross-sectional area) of the middle air inlet channel B1 (main body part) is larger than the apertures (cross-sectional areas) of all the spiral channels of the peripheral air inlet channel B2, the middle air inlet channel B1 has a larger aperture, the air inlet channel with a large aperture can slow down the air flowing speed, the time of the air flowing through the heat exchanger 5 can be increased, and the heating efficiency of the air is further improved. The peripheral side air inlet channel B2 is of a spiral structure, the length of the peripheral side air inlet channel B2 is larger than that of the middle air inlet channel B1, and the peripheral side air inlet channel B2 is longer, so that the time for air to flow through the heat exchanger 5 can be prolonged, and the heating efficiency of the air can be improved.
In this embodiment, the second air inlet channel B is divided into two air inlet channels with a large aperture and a spiral structure, so that the time that the space stays in the heat exchanger 5 can be respectively delayed, and the air entering the air inlet channel B can be split, and the flow speed of the air can be reduced in the splitting process, that is, the air speed can be reduced due to the combination of the two air inlet channels with the large aperture and the spiral structure, so that the heating efficiency of the air can be further improved.
In other embodiments, the middle air inlet channel B1 may be configured as a plurality of straight hole channels, and the peripheral air inlet channel B2 may be configured as another number of spiral channels, which is also beneficial to improving the heating efficiency of air.
In other embodiments, the inner wall of the outer tube 42 may be provided with a thread groove corresponding to the inner tube 41, and after the inner tube 41 and the outer tube 42 are combined, the thread grooves of both are combined into the peripheral side air intake passage B2.
In this embodiment, the inner tube 1 is installed in the middle tube 2, the outer tube 3 is sleeved outside the middle tube 2, the first end of the outer tube 3 is provided with the upper end cover 31, the upper end cover 31 covers the upper ends of the inner tube 1, the middle tube 2 and the outer tube 3, the upper end cover 31 is connected with the first end of the outer tube 3 through a connection structure such as a screw, the upper end cover 31 is also clamped with the middle tube 2 and the inner tube 1, and an avoidance port is arranged in the middle of the upper end cover 31 and aligned with the accommodating cavity 12, so that the aerosol forming substrate 6 can be inserted into the accommodating cavity 12 through the avoidance port of the upper end cover 31. The second end of the middle pipe 2 is provided with an integrated lower end cover structure, and the second end of the outer pipe 3 is connected with the second end of the middle pipe 2 through a connecting structure such as a screw.
Sealing structures such as sealing rings and the like can be arranged at the installation position of the upper end cover 31 and at the connection positions among the inner pipe 1, the middle pipe 2 and the outer pipe 3 so as to avoid heat energy loss in the heating structure.
The second end in the intermediate pipe 2 is provided with a baffle 21, and the baffle 21 is provided with a first air inlet channel A which can be arranged as two straight hole channels. The lower end of the intermediate tube 2 has an opening, and air enters the first air intake passage a from the opening of the intermediate tube 2, thereby introducing the air into the heating structure.
In other embodiments, the heating structure may not include the outer tube 3, and the outer tube 3 may be a part of the aerosol-generating device, and the heating structure may be directly mounted on a mounting structure in the aerosol-generating device, or may be capable of achieving a sealed connection between the intermediate tube 2 and the inner tube 1.
In this embodiment, the first air inlet channel a, the second air inlet channel B, the third air inlet channel C and the accommodating cavity 12 are sequentially communicated from bottom to top, and air enters the aerosol-forming substrate 6 along the first air inlet channel a, the second air inlet channel B, the third air inlet channel C and the accommodating cavity 12. Specifically, the first air inlet channel a, the peripheral air inlet channel B2, the third air inlet channel C and the accommodating cavity 12 are sequentially communicated and connected in series from bottom to top to form a first air inlet channel, and the first air inlet channel a, the middle air inlet channel B1 and the accommodating cavity 12 are sequentially communicated and connected in series from bottom to top to form a second air inlet channel.
A first transition passage is arranged between the first air inlet passage A and the second air inlet passage B, the first transition passage is a part of the intermediate pipe 2, and the first air inlet passage A and the second air inlet passage B are communicated through the first transition passage. A second transition passage is provided between the peripheral side intake passage B2 and the third intake passage C, the second transition passage being a part of the inner tube 1, the peripheral side intake passage B2 and the third intake passage C communicating through the second transition passage.
In other embodiments, the first air intake channel a, the second air intake channel B, and the third air intake channel C may also be directly butted in sequence.
In this embodiment, the heating body 5 may be an electromagnetic heating coil, the outer cylinder 42 is of a metal structure, the electromagnetic heating coil is disposed on the outer side of the middle tube 2 in the circumferential direction, and the outer side of the middle tube 2 in the circumferential direction may be provided with a radial protrusion for limiting and mounting the electromagnetic heating coil. The electromagnetic heating coil can heat the outer cylinder 42 through an electromagnetic heating mode, and then heat the heat exchanger 4, and the heat exchanger 4 can transfer heat energy to air passing through the heat exchanger 4, so that the air is heated.
In other embodiments, the heat exchanger 4 is of a metal structure, and the electromagnetic heating coil may also directly heat the heat exchanger 4. Alternatively, the heating body 5 may be a resistance heating structure such as a heating sheet or a heating rod, and the resistance heating structure such as a heating sheet or a heating rod may be directly connected to the heat exchanger 4, or may heat the heat exchanger 4.
In this embodiment, the axial length of the heat exchanger 4 is greater than the thickness of the baffle 21, and the axial length of the heat exchanger 4 is also greater than the thickness of the baffle 11 in the inner tube 1; that is, the length of the second intake passage B is greater than the length of the first intake passage a, and the length of the second intake passage B is greater than the length of the third intake passage C.
The first air intake passage a has a first cross-sectional area S1, the connecting pipe 6 has two passages, and the cross-sectional area of one passage is the first cross-sectional area S1; the second intake passage B has a second cross-sectional area S2, and the sum of the cross-sectional areas of the intermediate intake passage B1 and the peripheral intake passage B2 of the heat exchanger 4 is the second cross-sectional area S2; the third intake passage C has a third cross-sectional area S3, and the partition structure of the inner tube 1 has three passages whose cross-sectional areas are the third cross-sectional area S3.
Wherein the second cross-sectional area S2 is greater than the first cross-sectional area S1, and the second cross-sectional area S2 is greater than the third cross-sectional area S3. For example, the second cross-sectional area S2 is less than 40 square millimeters, the first cross-sectional area S1 is greater than 0.2 square millimeters and less than 5 square millimeters, and the third cross-sectional area S3 is greater than 0.2 square millimeters and less than 5 square millimeters.
In this embodiment, the air inlet channel is divided into a three-stage structure by the heating structure, and the second cross-sectional area S2 of the second air inlet channel B in the middle stage is set to be larger, which is favorable for reducing the air flow speed, so as to improve the heating time of air in the second air inlet channel B, enable air with higher temperature to enter the aerosol forming substrate 6, and improve the heating efficiency of the aerosol forming substrate 6; the first cross section area S1 of the first air inlet channel A is smaller than the second cross section area S2, so that the flow restriction function can be realized, and the flow acceleration of the air in the second air inlet channel B caused by overlarge air flow is prevented; the third cross-sectional area S3 of the third air intake channel C is smaller than the second cross-sectional area S2, and the third air intake channel C can accelerate air so that the air heated in the second air intake channel B can penetrate into the aerosol-forming substrate 6 deeper to improve the heating efficiency of the aerosol-forming substrate 6. And the second air inlet channel B is arranged as the middle air inlet channel B1 and the peripheral side air inlet channel B2, so that the inlet air can be split, the flow speed of the air is further reduced, and the heating efficiency of the air is improved.
Embodiment two:
the present embodiment provides an aerosol generating device, which is a heating non-combustion device, comprising a housing and a heating structure according to any of the above embodiments, the heating structure being mounted in the housing, the housing having a receptacle aligned with a receiving cavity 12 of the heating structure such that an aerosol-forming substrate 6 can be inserted into the receiving cavity 12 through the receptacle of the housing. The shell is also internally provided with a power supply and an electric wire, the power supply is connected with the heating body 5 through the electric wire, the power supply supplies power to the heating body 5, the heating body 5 converts electric energy into heat energy to heat the heat exchanger, and then air entering the aerosol forming substrate 6 is heated.
In this embodiment, the air inlet channel is divided into a three-stage structure by the heating structure, and the second cross-sectional area S2 of the second air inlet channel B in the middle stage is set to be larger, which is favorable for reducing the air flow speed, so as to improve the heating time of air in the second air inlet channel B, enable air with higher temperature to enter the aerosol forming substrate 6, and improve the heating efficiency of the aerosol forming substrate 6; the first cross section area S1 of the first air inlet channel A is smaller than the second cross section area S2, so that the flow restriction function can be realized, and the flow acceleration of the air in the second air inlet channel B caused by overlarge air flow is prevented; the third cross-sectional area S3 of the third air intake channel C is smaller than the second cross-sectional area S2, and the third air intake channel C can accelerate air so that the air heated in the second air intake channel B can penetrate into the aerosol-forming substrate 6 deeper to improve the heating efficiency of the aerosol-forming substrate 6. And the second air inlet channel B is arranged as the middle air inlet channel B1 and the peripheral side air inlet channel B2, so that the inlet air can be split, the flow speed of the air is further reduced, and the heating efficiency of the air is improved.
The foregoing description of the utility model has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the utility model pertains, based on the idea of the utility model.
Claims (10)
1. A heating structure of an aerosol-generating device, comprising: the heat exchanger comprises an inner pipe, a heat exchanger and a middle pipe, wherein the inner pipe and the heat exchanger are positioned in the middle pipe;
the inner tube is provided with a containing cavity, the inner tube is provided with a first end and a second end, the first end of the inner tube is provided with an opening, the opening is used for being inserted with aerosol generating matrixes, and the heat exchanger is arranged at the second end of the inner tube;
the middle pipe is provided with a first end and a second end, the second end of the middle pipe is provided with a first air inlet channel, the heat exchanger is provided with a second air inlet channel, the second air inlet channel comprises a middle air inlet channel and a peripheral air inlet channel, the peripheral air inlet channel surrounds the peripheral outer side of the middle air inlet channel, the second end of the inner pipe is provided with a third air inlet channel, the first air inlet channel, the second air inlet channel, the third air inlet channel and the accommodating cavity are sequentially communicated, and the first air inlet channel is used for introducing outside air into the second air inlet channel; the first air inlet passage has a first cross-sectional area, the second air inlet passage has a second cross-sectional area, and the third air inlet passage has a third cross-sectional area; the second cross-sectional area is greater than the first cross-sectional area and the second cross-sectional area is greater than the third cross-sectional area.
2. The heating structure of an aerosol-generating device according to claim 1, wherein the peripheral side air inlet channel comprises one or more spiral channels.
3. The heating structure of an aerosol-generating device according to claim 1, wherein the length of the peripheral side air intake passage is greater than the length of the intermediate air intake passage, and the cross-sectional area of the peripheral side air intake passage is smaller than the cross-sectional area of the intermediate air intake passage.
4. A heating structure of an aerosol-generating device according to claim 3, wherein a second end of the inner tube is provided with a partition plate, and the partition plate is provided with the third air inlet passage; the heat exchanger comprises an inner cylinder and an outer cylinder, wherein the outer cylinder is sleeved on the outer side of the inner cylinder, the inner cylinder is internally provided with the middle air inlet channel, and the peripheral side air inlet channel is formed between the outer cylinder and the inner cylinder.
5. The aerosol generating device heating structure of claim 4, wherein the middle portion of the partition plate is provided with a relief hole, one end of the inner cylinder is provided with a protruding portion, the protruding portion is located in the relief hole, and the middle air inlet channel passes through the protruding portion and is communicated with the accommodating cavity.
6. The heating structure of an aerosol-generating device according to claim 1, wherein the first air intake passage, the second air intake passage, and the third air intake passage each comprise one or more passages, and the first cross-sectional area, the second cross-sectional area, and the third cross-sectional area are each the sum of the cross-sectional areas of the one or more passages.
7. The heating structure of an aerosol-generating device according to claim 6, wherein the second cross-sectional area is less than 40 square millimeters; and/or the first cross-sectional area is greater than 0.2 square millimeters and less than 5 square millimeters and the third cross-sectional area is greater than 0.2 square millimeters and less than 5 square millimeters.
8. The heating structure of an aerosol-generating device according to claim 6, wherein a length of the second air intake passage is greater than a length of the first air intake passage, and/or a length of the second air intake passage is greater than a length of the third air intake passage.
9. The heating structure of an aerosol-generating device according to any one of claims 1 to 8, further comprising an outer tube, the outer tube being sleeved outside the intermediate tube, the outer tube having a first end and a second end, the first end of the outer tube being connected to the intermediate tube and the inner tube by an upper end cap, the second end of the outer tube being connected to the second end of the inner tube.
10. An aerosol-generating device comprising a heating structure of the aerosol-generating device according to any of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223167782.7U CN219288762U (en) | 2022-11-28 | 2022-11-28 | Aerosol generating device and heating structure thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223167782.7U CN219288762U (en) | 2022-11-28 | 2022-11-28 | Aerosol generating device and heating structure thereof |
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| CN219288762U true CN219288762U (en) | 2023-07-04 |
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| CN202223167782.7U Active CN219288762U (en) | 2022-11-28 | 2022-11-28 | Aerosol generating device and heating structure thereof |
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| CN (1) | CN219288762U (en) |
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