WO2023211001A1 - Procédé de génération d'aérosol et dispositif électronique mettant en œuvre un tel procédé - Google Patents

Procédé de génération d'aérosol et dispositif électronique mettant en œuvre un tel procédé Download PDF

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Publication number
WO2023211001A1
WO2023211001A1 PCT/KR2023/004697 KR2023004697W WO2023211001A1 WO 2023211001 A1 WO2023211001 A1 WO 2023211001A1 KR 2023004697 W KR2023004697 W KR 2023004697W WO 2023211001 A1 WO2023211001 A1 WO 2023211001A1
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WIPO (PCT)
Prior art keywords
resonator
aerosol
microwaves
microwave
generating
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PCT/KR2023/004697
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English (en)
Korean (ko)
Inventor
박인수
김대호
신지원
Original Assignee
주식회사 케이티앤지
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Publication of WO2023211001A1 publication Critical patent/WO2023211001A1/fr

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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/46—Shape or structure of electric heating means
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/50—Control or monitoring
    • A24F40/51—Arrangement of sensors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6447—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors
    • H05B6/645—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using temperature sensors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/66—Circuits
    • H05B6/68—Circuits for monitoring or control
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/66—Circuits
    • H05B6/68—Circuits for monitoring or control
    • H05B6/686—Circuits comprising a signal generator and power amplifier, e.g. using solid state oscillators
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/70—Feed lines
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/70—Feed lines
    • H05B6/707—Feed lines using waveguides

Definitions

  • the examples below relate to technology for generating aerosol, and specifically relate to technology for generating aerosol using microwaves.
  • Microwave heating technology is a technology that can directly heat polar molecules such as water or organic solvents using the principle of dielectric heating. It is energy efficient because only substances that need to be heated can be selectively heated using microwaves. This is high and the heating rate is very fast. However, in the process of generating microwaves, the supplied electric energy is converted into microwave energy with an efficiency of about 60 to 70%, so the heat capacity required when heating a material with microwaves is 50% of the heat capacity required by the existing external heating method. % or less, higher energy efficiency can be secured. In addition, compared to the existing external heating method, the microwave heating method can heat faster as the heat capacity required for heating is smaller.
  • microwave heating method has been fields requiring large-capacity heating capabilities.
  • Devices supplied to the microwave technology-related industry such as microwave generators such as magnetrons and essential components, are designed for large capacities of kilowatts (kW) or higher, and home microwave ovens also have a microwave output of around 900W.
  • the smaller and smaller the heating material the more effective the direct heating method, microwave heating, can be maximized compared to the external heating method, and the heating rate can also be dramatically increased.
  • the wavelength of the microwave used for heating is about 12 cm or about 30 cm, precise microwave device design technology is required to miniaturize the heating device.
  • One embodiment may provide a method of aerosol generation performed by an electronic device.
  • One embodiment may provide an electronic device that generates an aerosol.
  • an electronic device includes a control unit that controls the operation of the electronic device, an oscillator that generates microwaves of a preset frequency, a microwave coupler that supplies the generated microwaves to a resonator, the A resonator that generates an amplified electromagnetic field by resonating microwaves, and an insertion into which the aerosol-generating substrate is inserted such that at least a portion of a central conductor of the resonator penetrates the aerosol-generating substrate, wherein at least a portion of the electromagnetic field is An aerosol can be generated by heating the aerosol-generating substrate.
  • the resonator may be formed by a cavity between at least a portion of a cylindrical outer conductor and the central conductor.
  • the cylindrical outer conductor and the central conductor may have a coaxial axis.
  • the resonator has a length of 1/4 of the wavelength of the microwave within the resonator, and a first end of the resonator is formed as a closed end where the outer conductor and the central conductor are connected, and is opposite to the first end.
  • the second end of the resonator may be formed as an open end where the outer conductor and the central conductor are not connected but are separated from each other.
  • the electronic device further includes a microwave input waveguide formed in a portion of the outer conductor, and the microwave coupler may be connected to the microwave input waveguide.
  • the microwave coupler and the central conductor may be directly connected.
  • an aerosol generation method performed by an electronic device includes generating microwaves of a preset frequency using an oscillator, and passing the generated microwaves to a resonator through a microwave coupler.
  • the cylindrical outer conductor and the central conductor may have a coaxial axis.
  • the resonator has a length of 1/4 of the wavelength of the microwave within the resonator, and a first end of the resonator is formed as a closed end where the outer conductor and the central conductor are connected, and is opposite to the first end.
  • the second end of the resonator may be formed as an open end where the outer conductor and the central conductor are not connected but are separated from each other.
  • the length between the first end and the second end may be an integer multiple of 1/4 of the wavelength.
  • the aerosol generating method may further include measuring the temperature of the aerosol generating substrate, and stopping the generation of the microwaves when the measured temperature is greater than or equal to a first preset threshold temperature.
  • the step of generating microwaves of a preset frequency using the oscillator includes generating the microwaves when the temperature of the aerosol-generating substrate measured while the generation of the microwaves is stopped is below a preset second critical temperature. can do.
  • a method of generating an aerosol performed by an electronic device may be provided.
  • An electronic device that generates an aerosol may be provided.
  • FIG 1 shows an electronic device according to an example.
  • Figure 2 is a configuration diagram of an electronic device according to an embodiment.
  • Figure 3 is a configuration diagram of a control unit according to an embodiment.
  • Figure 4 is a configuration diagram of a resonator formed based on a waveguide according to an example.
  • Figure 5 shows a cigarette inserted into a resonator according to one example.
  • Figure 6 shows an electric field created by microwaves according to one example.
  • Figure 7 shows a magnetic field created by microwaves according to one example.
  • Figure 8 shows the temperature heating distribution for an aerosol-generating substrate exhibited by resonant microwaves according to one example.
  • Figures 9 and 10 show the structure of a cigarette according to one example.
  • Figure 11 is a flow chart of an aerosol generation method according to one embodiment.
  • FIG. 12 is a flow diagram of a method for controlling the generation of microwaves based on the temperature of an aerosol-generating substrate according to one example.
  • first or second may be used to describe various components, but these terms should be interpreted only for the purpose of distinguishing one component from another component.
  • a first component may be named a second component, and similarly, the second component may also be named a first component.
  • FIG 1 shows an electronic device according to an example.
  • the electronic device 100 may generate an aerosol by heating the aerosol generating substrate in the cigarette 2 inserted into the electronic device 100. Users can smoke by inhaling the generated aerosol.
  • the electronic device 100 may adopt a method of heating the aerosol-generating substrate using an electromagnetic field generated by resonating microwaves, such as in a microwave oven, rather than directly applying heat to the aerosol-generating substrate. The above method may be named microwave dielectric heating.
  • a cavity resonator that produces high density microwaves may be required to heat the aerosol-generating substrate.
  • a source such as a generator and supplying them to the medium, only weak heating is possible and energy efficiency can also be very low.
  • the size of the commonly used square box-shaped or cylindrical cavity resonator must be about 60 mm or more. Microwaves may not enter a resonator with a size smaller than 60 mm having the above shape.
  • An example of how to make a resonator in a size smaller than the limit size of the resonator according to the constraints caused by the size of the wavelength is to pattern the electromagnetic field by implementing the resonator in the form of a coaxial or parallel plate. It may be formed in TEM (transverse electromagnetic) mode to create a structure in which there is no cutoff frequency of the electromagnetic field. As another example, there may be a method of using very high frequency microwaves or filling the inside of the resonator with a material with a very high dielectric constant value.
  • the 1/4 wavelength resonator may have the shortest length among available resonators, and the first end of the resonator may be short-circuited by forming a metal wall, and the second end may be opened so that there is no metal part. The method of generating an aerosol using a 1/4 wavelength resonator is described in detail below with reference to FIGS. 2 to 12.
  • the cigarette 2 may be inserted in such a way that a coaxial resonator surrounds at least a portion of the cigarette 2 (e.g., an aerosol-generating substrate), and an aerosol may be generated by an electromagnetic field generated by the resonator.
  • the substrate may be heated.
  • the cigarette 2 can be divided into a first part containing an aerosol-generating substrate and a second part containing a filter, etc.
  • the second part of the cigarette 2 may also contain an aerosol-generating substrate.
  • the entire first part may be inserted into the electronic device 100, and the second part may be exposed to the outside. Alternatively, only part of the first part may be inserted into the electronic device 100, or the entire first part and part of the second part may be inserted.
  • the user may inhale the aerosol while holding the second portion with his or her mouth. At this time, the aerosol is generated when external air passes through the first part, and the generated aerosol passes through the second part and is delivered to the user's mouth.
  • Figure 2 is a configuration diagram of an electronic device according to an embodiment.
  • the electronic device 100 may include a control unit 210, an oscillator 220, a microwave coupler 230, a resonator 240, and an insertion unit 250.
  • the oscillator 220 may include a signal source 222 such as an oscillator and an amplifier 225.
  • the electronic device 100 may further include general-purpose components.
  • the electronic device 100 may include a display (or indicator) capable of outputting visual information and/or a motor for outputting tactile information.
  • the electronic device 100 may further include at least one sensor (puff detection sensor, temperature detection sensor, cigarette insertion detection sensor, etc.). Additionally, the electronic device 100 may be manufactured in a structure that allows external air to flow in or internal gas to flow out even when the cigarette 2 is inserted.
  • External air may be introduced through at least one air passage formed in the electronic device 100.
  • the opening and closing of an air passage formed in the electronic device 100 and/or the size of the air passage may be adjusted by the user. Accordingly, the amount of atomization, smoking sensation, etc. can be adjusted by the user.
  • external air may be introduced into the cigarette 2 through at least one hole formed on the surface of the cigarette 2.
  • the electronic device 100 may form a system with a separate cradle.
  • the cradle may be used to charge the battery of the electronic device 100.
  • the control unit 210 can control the operation of the electronic device 100. Below, the control unit 210 will be described in detail with reference to FIG. 3 .
  • the signal source 222 of the oscillator 220 may generate microwaves of a preset frequency based on a control signal from the controller 210.
  • the preset frequency may be a frequency within the ISM frequency band.
  • the preset frequency may be 2.45 GHz or 5.8 GHz and is not limited to the described embodiment.
  • the amplifier 225 may amplify the output of the microwave generated by the signal source 222 to an output strong enough to be used for heating a material.
  • the amplifier 225 may adjust the output after the amplifier 225 by adjusting the intensity of the signal source 222 based on the signal from the control unit 210. For example, the amplitude of microwaves can be decreased or increased.
  • the power of the microwave can be adjusted by adjusting the amplitude of the microwave.
  • the microwave coupler 230 may supply microwaves to the resonator 240. Feeding the microwaves generated by the oscillator 220 from the microwave transmission line (or waveguide) into the resonator is called resonator coupling, and its structure can be defined as the microwave coupler 230.
  • the microwave coupler 230 may be directly connected to a central conductor (not shown) located within the resonator 240, and microwaves may be supplied to the resonator by the microwave coupler 230 and the central conductor.
  • the central conductor is described in detail below with reference to Figure 4.
  • the resonator 240 can form an amplified electromagnetic field by resonating the supplied microwaves. At least a portion of the electromagnetic field formed by the resonant microwave may generate an aerosol by heating an aerosol-generating substrate inserted into the interior of the waveguide.
  • the resonator 240 may be a 1/4 wavelength resonator, the first end of the resonator 240 may be shorted through a metal wall, and the second end may be open.
  • the structure of the resonator 240 according to one example is described in detail below with reference to FIG. 4.
  • the insertion portion 250 may be formed based on a waveguide.
  • the resonator 240 may be formed based on a central conductor and an outer conductor, and the insertion portion 250 may be formed to connect to the outer conductor of a waveguide in which the central conductor is not disposed.
  • Figure 3 is a configuration diagram of a control unit according to an embodiment.
  • control unit 210 includes a communication unit 310, a processor 320, and a memory 330.
  • the communication unit 310 is connected to the processor 320 and the memory 330 to transmit and receive data.
  • the communication unit 310 can be connected to other external devices to transmit and receive data.
  • the expression “transmitting and receiving "A” may refer to transmitting and receiving "information or data representing A.”
  • the communication unit 310 may be implemented as a circuitry within the control unit 210.
  • the communication unit 310 may include an internal bus and an external bus.
  • the communication unit 310 may be an element that connects the control unit 210 and an external device.
  • the communication unit 310 may be an interface.
  • the communication unit 310 may receive data from an external device and transmit the data to the processor 320 and the memory 330.
  • the processor 320 processes data received by the communication unit 310 and data stored in the memory 330.
  • a “processor” may be a data processing device implemented in hardware that has a circuit with a physical structure for executing desired operations.
  • the intended operations may include code or instructions included in the program.
  • data processing devices implemented in hardware include microprocessors, central processing units, processor cores, multi-core processors, and multiprocessors. , ASIC (Application-Specific Integrated Circuit), and FPGA (Field Programmable Gate Array).
  • Processor 320 executes computer-readable code (e.g., software) stored in memory (e.g., memory 330) and instructions triggered by processor 320.
  • computer-readable code e.g., software
  • the memory 330 stores data received by the communication unit 310 and data processed by the processor 320.
  • the memory 330 may store programs (or applications, software).
  • the stored program may be a set of syntaxes that are coded to control the electronic device 100 and can be executed by the processor 320.
  • the memory 330 may include one or more volatile memory, non-volatile memory, random access memory (RAM), flash memory, a hard disk drive, and an optical disk drive.
  • volatile memory non-volatile memory
  • RAM random access memory
  • flash memory flash memory
  • hard disk drive hard disk drive
  • optical disk drive optical disk drive
  • the memory 330 stores a set of instructions (eg, software) that operates the control unit 210.
  • a set of instructions for operating the control unit 210 is executed by the processor 320.
  • the communication unit 310, processor 320, and memory 330 are described in detail below with reference to FIGS. 11 and 12.
  • Figure 4 is a configuration diagram of a resonator formed based on a waveguide according to an example.
  • the resonator 460 may be formed based on a waveguide including a first wall 421, an outer conductor 410, and a center conductor 450.
  • the resonator 460 may correspond to the resonator 240 described above with reference to FIG. 2 .
  • the outer conductor 410 and the central conductor 450 may have the same axis.
  • the resonator 460 may be formed by a cavity between the cylindrical outer conductor 410 and the central conductor 450.
  • the first end of the central conductor 450 is connected to the first wall 421 and the second end may penetrate at least a portion of the aerosol-generating substrate inserted within the waveguide.
  • Central conductor 450 may have an external diameter such that at least a portion of the aerosol-generating substrate may be penetrated by central conductor 450 .
  • the material of center conductor 450 may be aluminum or stainless steel and is not limited to the described embodiment.
  • the outer conductor 410 when the central conductor 450 in the outer conductor 410 has a structure connected only to the first wall 421, the outer conductor 410 is a coaxial waveguide in the section where the central conductor 450 exists. Since it has the structure of a cylindrical waveguide in the section where the central conductor 450 does not exist, it can naturally function as a mode converter. For example, if the frequency of the microwave is 2.45 GHz, the microwave may enter the cutoff frequency region in the cylindrical waveguide portion because the diameter of the cylindrical waveguide is small.
  • the central conductor 410 may include a temperature sensor capable of measuring temperature.
  • the temperature sensor may be an infrared (IR) sensor or a thermo-couple sensor.
  • the first wall 421, the outer conductor 410, and the central conductor 450 may be metal.
  • the outer conductor 410 itself may be cylindrical with a hollow interior.
  • an insertion portion 470 (eg, insertion portion 250 in FIG. 2) may be formed to be connected to the inner space of the outer conductor 410.
  • the insertion portion 470 may be formed to extend to the outer conductor 410.
  • the insertion portion 470 may be connected to the second wall 422 of the outer conductor 410.
  • the material of insert 470 may be different from the material of outer conductor 410 or second wall 422.
  • the material of the outer conductor 410 may be a material that prevents the electromagnetic field generated in the internal cavity from propagating to the outside, and the material of the insertion portion 470 may be a material that does not affect the propagation of the electromagnetic field.
  • the resonator 460 may be formed by a first end formed by the first wall 421, at least a portion of the outer conductor 410, and the center conductor 450. That is, the resonator 460 may be in the form of a tube centered on the central conductor 450.
  • the resonator 460 has a length of 1/4 of the wavelength of the microwave within the resonator 460, and the first end of the resonator 460 is connected to an outer conductor (or wall) and a center conductor. It is formed as a closed end, and the second end of the resonator 460, which faces the first end, may be formed as an open end where the outer conductor (or wall) and the central conductor are not connected.
  • the length between the first end and the second end may be an integer multiple of 1/4 of the wavelength.
  • microwaves When microwaves are trapped in a limited space, such as the resonator 460, they may have a different wavelength from microwaves radiating in free space. For example, the wavelength of the microwave may vary depending on structural factors of the resonator 460.
  • a user may insert the aerosol-generating substrate through the insertion portion 470 such that the central conductor 450 penetrates at least a portion of the aerosol-generating substrate.
  • the aerosol-generating substrate may be inserted such that the tip portion 451 of the central conductor 450 is positioned at a desired location within the aerosol-generating substrate. Insertion of the aerosol-generating substrate is described in detail below with reference to Figure 5.
  • Microwaves may be supplied to the central conductor 450 through the microwave coupler 440, the microwaves may be supplied to the resonator 460 by the central conductor 450, and the microwaves may resonate by the resonator 460.
  • a coaxial cable can be used to transmit output within several tens of Watts, and the microwave coupler 440 is installed close to the position of the first wall 421 so as not to interfere with the insertion of the aerosol-generating substrate. It can be.
  • the coupling method of the microwave coupler 440 may be magnetic coupling. Since the size inside the resonator 460 is relatively small, sufficient coupling can be obtained only by forming a magnetic loop created by directly contacting the microwave coupler 440 and the central conductor 450. Accordingly, the microwave coupler 440 may have a structure connected to the central conductor 450 in a radial direction at a preset distance from the first wall 421.
  • An amplified electromagnetic field is formed within the resonator 460 by the resonant microwave, and the aerosol-generating substrate 460 may be heated by at least a portion of the electromagnetic field.
  • the electric and magnetic fields formed by microwaves are described in detail below with reference to FIGS. 6 and 7.
  • the microwave input waveguide 430 may be formed in a portion of the outer conductor 410, and the microwave coupler 440 may be connected to the microwave input waveguide 430.
  • the microwave coupler 440 may be located within the microwave input waveguide 430.
  • the extent to which the aerosol-generating substrate located in the resonator 460 absorbs microwaves may vary depending on the material properties of the aerosol-generating substrate and the frequency of the microwaves.
  • the structures of the resonator 460 and the central conductor 450 may be determined to increase the absorption of microwaves. For example, to adjust the resonance frequency and microwave absorption rate of the resonator 460, at least the distance (a) between the first wall 421 and the microwave coupler 440 and the length (b) of the central conductor 450 One can be adjusted. As another example, at least one of the outer diameter (c) of the central conductor 450 and the inner diameter (d) of the outer conductor 410 may be adjusted to adjust the absorption distribution of microwaves.
  • At least one of the distance (a), length (b), outer diameter (c), and inner diameter (d) is determined in advance so that the highest absorption amount occurs at the 2.45 GHz frequency, and the resonator ( 460), the central conductor 450, and the microwave coupler 440 can be manufactured.
  • At least one sensor may be further included in the outer conductor 410 (or resonator 460) or insertion part 470 described above with reference to FIG. 4 .
  • the sensor may include one or more of a puff detection sensor, a temperature detection sensor, and a cigarette insertion detection sensor.
  • the senor may be located at the tip portion 451 of the central conductor 450.
  • a temperature sensor may be located within tip portion 451 and measure the temperature within the aerosol-generating substrate.
  • Figure 5 shows a cigarette inserted into a resonator according to one example.
  • cigarette 500 may be inserted into the resonator 460 described above with reference to FIG. 4.
  • cigarette 500 may include a tobacco rod 510 and a filter rod 520, and the tobacco rod 510 of cigarette 500 may be inserted into waveguide 400.
  • Tobacco load 510 may include an aerosol generating substrate.
  • a user may inhale the aerosol generated by the heated aerosol generating substrate through the filter rod 520.
  • the central conductor 450 penetrates the tobacco rod 510 (or an aerosol-generating substrate), and the cigarette is disposed such that the tip portion 451 of the central conductor 450 is located within the tobacco rod 510.
  • 500 may be disposed within the resonator 460 (or outer conductor 410) through the insertion portion 470.
  • Microwaves may be supplied into the resonator 460 through the microwave coupler 440, and the microwaves may resonate by the resonator 460.
  • An aerosol-generating substrate can be heated by absorbing resonant microwaves.
  • the main component of the aerosol-generating substrate is PG (propylene glycol)
  • the dielectric constant of PG is about 32 and has a fairly large loss tangent for microwaves, so PG is resistant to microwaves. can be absorbed efficiently.
  • the electric field formed by the resonated microwave is described with reference to FIG. 6, and the magnetic field is described with reference to FIG. 7.
  • the temperature heating distribution for aerosol-generating substrates exhibited by resonant microwaves is explained in detail with reference to Figure 8.
  • the structure of the resonator 460 may prevent electromagnetic fields from leaking in the direction of the insertion part 470 rather than the area of the resonator 460.
  • the electromagnetic field generated by the resonated microwave only heats the aerosol-generating substrate and does not propagate to the outside (e.g., toward the user's mouth). Since the electromagnetic field does not propagate (or leak) to spaces other than the area of the resonator 460, a separate function or structure of the electronic device 100 to shield the electromagnetic field is not required.
  • Figure 6 shows an electric field created by microwaves according to one example.
  • An electric field formed by microwaves according to an example may appear by the resonator 460 described with reference to FIG. 4 .
  • the electric field shown relates to the cross-section of the waveguide 400 described above. It appears that the strongest electric field is formed in region 601, which may be a portion adjacent to the tip portion 451 of the central conductor 450 described with reference to FIG. 4.
  • the electric field represents a direction from the central conductor 450 to the outer conductor 460, and may be stronger closer to the central conductor 450, and weaker toward the outer conductor 460. Additionally, in the direction of the central axis of the resonator 460, the electric field may be strongest at the tip portion 451 of the central conductor 450 and may become weaker toward the first wall 421 of the waveguide 400. Since the aerosol generating substrate 610 is heated based on the principle of microwave dielectric heating, the degree of absorption of microwaves may increase depending on the strength of the electric field formed within the resonator 460.
  • Figure 7 shows a magnetic field created by microwaves according to one example.
  • a magnetic field formed by microwaves according to an example may appear due to the structure of the resonator 460 described with reference to FIG. 4 .
  • the magnetic field shown is relative to the cross-section of the resonator 460 described above.
  • the magnetic field may be formed in a direction circling a central axis perpendicular to the electric field.
  • the strongest magnetic field is formed in the area 701 corresponding to the connection portion of the microwave coupler 440 and the central conductor 450 described with reference to FIG. 4, and extends to the tip portion 451 of the central conductor 450. It can become increasingly weaker.
  • Figure 8 shows the temperature heating distribution for an aerosol-generating substrate exhibited by resonant microwaves according to one example.
  • a temperature heating distribution for the aerosol-generating substrate 810 produced by microwaves according to an example by the resonator 460 described with reference to FIG. 4 may appear.
  • the temperature heating distribution shown relates to the cross-section of the resonator 460 described above.
  • the higher the absorption of microwaves the higher the heating temperature may appear.
  • the highest heating temperature occurs in region 801, which may be the portion adjacent to the tip portion 451 of the central conductor 450 described with reference to FIG. 4.
  • the output and output time of the microwave may be adjusted so that the highest heating temperature shown is within a preset range (eg, 200 to 300 degrees).
  • the distribution of heating temperatures may vary depending on the properties of the aerosol-generating substrate 810 and its placement within the resonator 460.
  • the optimal temperature profile for heating the aerosol-generating substrate 810 can be derived in advance.
  • Figures 9 and 10 show the structure of a cigarette according to one example.
  • the cigarette 2 includes a tobacco rod 91 and a filter rod 92.
  • the filter rod 92 is shown as a single segment, but the present invention is not limited thereto.
  • the filter rod 92 may be composed of a plurality of segments.
  • the filter rod 92 may include a segment that cools the aerosol and a segment that filters certain components contained within the aerosol. Additionally, if necessary, the filter rod 92 may further include at least one segment that performs another function.
  • the cigarette 2 may be packaged by at least one wrapper 94 . At least one hole may be formed in the wrapper 94 through which external air flows in or internal gas flows out. As an example, cigarette 2 may be packaged by one wrapper 94. As another example, the cigarette 2 may be overlappingly packaged by two or more wrappers 94. For example, the tobacco rod 91 may be packaged by the first wrapper 941 and the filter rod 92 may be packaged by the wrappers 942, 943, and 944. And, the entire cigarette 2 can be repackaged by a single wrapper 945. If the filter rod 92 is composed of a plurality of segments, each segment may be wrapped by wrappers 942, 943, and 944.
  • Tobacco load 91 includes an aerosol-generating substrate.
  • the aerosol-generating substrate may include, but is not limited to, at least one of glycerin, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, and oleyl alcohol.
  • the tobacco rod 91 may contain other additives such as flavoring agents, humectants, and/or organic acids. Additionally, flavoring liquids such as menthol or moisturizer can be added to the tobacco rod 91 by spraying them on the tobacco rod 91.
  • the tobacco rod 91 can be manufactured in various ways.
  • the tobacco rod 91 may be manufactured as a sheet or as a strand.
  • the tobacco rod 91 may be made of a cut filler made from finely chopped tobacco sheets.
  • the tobacco rod 91 may be surrounded by a heat-conducting material.
  • the heat-conducting material may be, but is not limited to, a metal foil such as aluminum foil.
  • the heat-conducting material surrounding the tobacco rod 91 can improve the heat conductivity applied to the tobacco rod by evenly dispersing the heat transmitted to the tobacco rod 91, thereby improving the taste of the tobacco.
  • the heat-conducting material surrounding the tobacco rod 91 may function as a susceptor that is heated by an induction heater. At this time, although not shown in the drawing, the tobacco rod 91 may further include an additional susceptor in addition to the heat-conducting material surrounding the outside.
  • Filter rod 92 may be a cellulose acetate filter. Meanwhile, there are no restrictions on the shape of the filter rod 92.
  • the filter rod 92 may be a cylindrical rod or a tubular rod with a hollow interior. Additionally, the filter rod 92 may be a recessed rod. If the filter rod 92 is composed of a plurality of segments, at least one of the plurality of segments may be manufactured in a different shape.
  • the filter rod 92 may include at least one capsule 93.
  • the capsule 93 may perform a flavor generating function or an aerosol generating function.
  • the capsule 93 may have a structure in which a liquid containing fragrance is wrapped with a film.
  • the capsule 93 may have a spherical or cylindrical shape, but is not limited thereto.
  • the cigarette 2 may have a structure different from the structure described above with reference to FIG. 9 .
  • the cigarette 2 of FIG. 10 may further include a front end plug 103 compared to the cigarette 2 of FIG. 9 .
  • the shear plug 103 may be located on one side of the tobacco rod 101 opposite the filter rod 102.
  • the front end plug 103 can prevent the cigarette rod 101 from leaving the outside and prevent aerosol generated from the cigarette rod 101 from entering the interior of the electronic device 100 during smoking.
  • the filter rod 102 may include a first segment 1021 and a second segment 1022.
  • the first segment 1021 may correspond to the first segment of the filter rod 92 in FIG. 9, and the second segment 1022 may correspond to the third segment of the filter rod 102 in FIG. 9. You can.
  • the diameter and overall length of the cigarette 2 may correspond to the diameter and overall length of the cigarette 2.
  • the length of the shear plug 103 is about 7 mm
  • the length of the tobacco rod 101 is about 15 mm
  • the length of the first segment 1021 is about 12 mm
  • the length of the second segment 1022 is about 14 mm.
  • the cigarette 2 may be packaged by at least one wrapper 105 . At least one hole may be formed in the wrapper 105 through which external air flows in or internal gas flows out.
  • the shear plug 103 is packaged by the first wrapper 1051
  • the tobacco rod 101 is packaged by the second wrapper 1052
  • the first segment (103) is packaged by the third wrapper 1053. 1021)
  • the second segment 1022 may be packaged by the fourth wrapper 1054.
  • the entire cigarette 2 can be repackaged by the fifth wrapper 1055.
  • At least one perforation 106 may be formed in the fifth wrapper 1055.
  • the perforation 106 may be formed in an area surrounding the tobacco rod 101, but is not limited thereto.
  • the perforation 106 may serve to transfer heat generated on the surface by an electromagnetic field to the inside of the tobacco rod 101.
  • the second segment 1022 may include at least one capsule 104.
  • the capsule 104 may perform a flavor generating function or an aerosol generating function.
  • the capsule 104 may have a structure in which a liquid containing fragrance is wrapped with a film.
  • the capsule 104 may have a spherical or cylindrical shape, but is not limited thereto.
  • Figure 11 is a flow chart of an aerosol generation method according to one embodiment.
  • the steps 1110 to 1140 below may be performed by the electronic device 100 described above with reference to FIGS. 1 to 9 .
  • the electronic device 100 may generate microwaves of a preset frequency using the signal source 222 of the oscillator 220.
  • the preset frequency may be the 915 MHz band, 2.45 GHz band, or 5.8 GHz band permitted for heating, and is not limited to the described embodiment.
  • step 1115 the electronic device 100 amplifies the intensity (or output) of the microwave using the amplifier 225 of the oscillator 220 and adjusts the output of the signal source 222 to produce the final output.
  • the intensity of the microwave can be adjusted.
  • the heating temperature can be adjusted by adjusting the output of the microwave.
  • the electronic device 100 may supply microwaves to the resonator 240 formed based on a waveguide through the microwave coupler 230.
  • the electronic device 100 may generate an electromagnetic field by resonating microwaves through the resonator 240.
  • the resonator 240 (or an outer conductor constituting a part of the resonator 240) may be cylindrical with a hollow interior.
  • the structure of the resonator 240 allows the microwave pattern to resonate in a TEM mode.
  • the size of the outer conductor constituting at least a portion of the resonator 240 can be smaller than 1/5 of the wavelength of the microwave.
  • the resonator 240 may include a tube-shaped resonator (eg, the resonator 460 of FIG. 4).
  • the resonator may be a quarter-wave resonator in which one side is closed and the other side is open.
  • the electronic device 100 may generate an aerosol by heating an aerosol-generating substrate inserted into the resonator 240 with an electromagnetic field formed by a resonated microwave.
  • the generated aerosol can be inhaled by the user through the filter rod 92 or 102 of the cigarette 2.
  • FIG. 12 is a flow diagram of a method for controlling the generation of microwaves based on the temperature of an aerosol-generating substrate according to one example.
  • steps 1210 and 1220 below may be further performed.
  • electronic device 100 may measure the temperature of the aerosol-generating substrate.
  • the electronic device 100 may measure the temperature of the aerosol-generating substrate using the sensor described above with reference to FIG. 4 .
  • the electronic device 100 may stop generating microwaves when the measured temperature is greater than or equal to a preset first threshold temperature. By stopping the generation of microwaves, unnecessary heating of the aerosol-generating substrate can be prevented.
  • the electronic device 100 may adjust the amplitude (or output) of the microwave when the measured temperature is greater than or equal to a preset first threshold temperature. By reducing the amplitude of the microwaves, heating the aerosol-generating substrate more than necessary can be prevented.
  • Step 1110 described above with reference to FIG. 11 may further include step 1230 below.
  • electronic device 100 may generate microwaves when the temperature of the aerosol-generating substrate is below the second threshold temperature.
  • the electronic device 100 may adjust the amplitude (or output) of the microwave when the measured temperature is less than a preset second threshold temperature. By increasing the amplitude of the microwaves, the aerosol-generating substrate can be heated with high energy.
  • the method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable medium.
  • the computer-readable medium may include program instructions, data files, data structures, etc., singly or in combination.
  • Program instructions recorded on the medium may be specially designed and configured for the embodiment or may be known and available to those skilled in the art of computer software.
  • Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks.
  • program instructions include machine language code, such as that produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter, etc.
  • the hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.
  • Software may include a computer program, code, instructions, or a combination of one or more of these, which may configure a processing unit to operate as desired, or may be processed independently or collectively. You can command the device.
  • Software and/or data may be used on any type of machine, component, physical device, virtual equipment, computer storage medium or device to be interpreted by or to provide instructions or data to a processing device. , or may be permanently or temporarily embodied in a transmitted signal wave.
  • Software may be distributed over networked computer systems and stored or executed in a distributed manner.
  • Software and data may be stored on one or more computer-readable recording media.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

Afin de générer un aérosol, selon un mode de réalisation, un aérosol peut être généré : par génération d'hyperfréquences d'une fréquence prédéfinie à l'aide d'un oscillateur ; par fourniture des hyperfréquences générées à un résonateur formé sur la base d'un guide d'ondes par l'intermédiaire d'un coupleur hyperfréquence et d'un conducteur central ; par génération d'un champ électromagnétique par résonance des hyperfréquences à travers le résonateur ; et par chauffage d'un substrat de génération d'aérosol inséré à l'intérieur du guide d'ondes au moyen du champ électromagnétique.
PCT/KR2023/004697 2022-04-25 2023-04-07 Procédé de génération d'aérosol et dispositif électronique mettant en œuvre un tel procédé WO2023211001A1 (fr)

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KR1020220050925A KR20230151345A (ko) 2022-04-25 2022-04-25 에어로졸 생성 방법 및 그 방법을 수행하는 전자 장치

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170064989A (ko) * 2015-12-02 2017-06-12 한국전기연구원 유전체 공진을 이용한 마이크로파 가열 장치
KR20190035949A (ko) * 2015-08-31 2019-04-03 브리티시 아메리칸 토바코 (인베스트먼츠) 리미티드 흡연가능 재료를 가열하기 위한 장치
KR20200101351A (ko) * 2017-12-28 2020-08-27 제이티 인터내셔널 소시에떼 아노님 증기 발생 장치를 위한 유도 가열 조립체
KR20210123839A (ko) * 2020-04-06 2021-10-14 주식회사 케이티앤지 에어로졸 생성 장치
CN113729304A (zh) * 2021-09-30 2021-12-03 深圳麦克韦尔科技有限公司 气溶胶产生装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190035949A (ko) * 2015-08-31 2019-04-03 브리티시 아메리칸 토바코 (인베스트먼츠) 리미티드 흡연가능 재료를 가열하기 위한 장치
KR20170064989A (ko) * 2015-12-02 2017-06-12 한국전기연구원 유전체 공진을 이용한 마이크로파 가열 장치
KR20200101351A (ko) * 2017-12-28 2020-08-27 제이티 인터내셔널 소시에떼 아노님 증기 발생 장치를 위한 유도 가열 조립체
KR20210123839A (ko) * 2020-04-06 2021-10-14 주식회사 케이티앤지 에어로졸 생성 장치
CN113729304A (zh) * 2021-09-30 2021-12-03 深圳麦克韦尔科技有限公司 气溶胶产生装置

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