CN-122003187-A - Aerosol generating device

CN122003187ACN 122003187 ACN122003187 ACN 122003187ACN-122003187-A

Abstract

An aerosol-generating device according to one aspect includes a power supply that supplies direct-current power, a power conversion unit that converts the direct-current power into alternating-current power, a coil that generates an induction magnetic field by the alternating-current power, an induction heating element that is heated by the induction magnetic field, a magnetic field sensing unit that senses the intensity of the induction magnetic field, and a control unit that estimates the temperature of the induction heating element based on the intensity of the induction magnetic field.

Inventors

Pu Xiangzhe
LI YUANJING
ZHANG ZHEHAO

Assignees

韩国烟草人参公社

Dates

Publication Date: 20260508
Application Date: 20250710
Priority Date: 20240903

Claims (10)

1. An aerosol-generating device comprising: a power supply for supplying DC power; a power conversion unit that converts the dc power into ac power; a coil for generating an induction magnetic field by the ac power; An induction heating element which is heated by the induction magnetic field; a magnetic field sensing part for sensing the intensity of the induced magnetic field, and And a control unit configured to estimate the temperature of the induction heating element based on the intensity of the induction magnetic field.
2. The aerosol-generating device according to claim 1, further comprising: a current sensing part sensing a current flowing in the coil, Wherein the control section acquires information on the strength of the induced magnetic field from the magnetic field sensing section based on a sensing result of the current sensing section.
3. An aerosol-generating device according to claim 2, wherein, When the magnitude of the current flowing through the coil is kept within a predetermined range, the control unit estimates the temperature of the induction heating element based on the intensity of the induction magnetic field.
4. An aerosol-generating device according to claim 3, further comprising: A memory for storing a correspondence relationship between the intensity of the induction magnetic field and the temperature of the induction heating element in the form of a lookup table, Wherein the control section determines the temperature of the induction heating element based on the lookup table.
5. An aerosol-generating device according to claim 4, wherein, The memory also stores information of a target temperature for each of the smoking intervals following the warm-up interval.
6. An aerosol-generating device according to claim 1, wherein, The control section controls the alternating-current power supplied to the coil based on a target temperature of each of a warm-up section and a smoking section subsequent to the warm-up section.
7. An aerosol-generating device according to claim 6, wherein, The preheating interval comprises: A first section for raising the temperature of the induction heating element to a target preheating temperature, and A second section in which the target warm-up temperature after the first section is maintained, Wherein the control unit estimates the temperature of the induction heating element based on the intensity of the induction magnetic field sensed in the second section.
8. An aerosol-generating device according to claim 7, wherein, The smoking interval comprises: a plurality of sub-smoking sections for gradually decreasing the temperature of the induction heating element from the target preheating temperature, Wherein the control section controls the alternating-current power supplied to the coil in accordance with target smoking temperatures that are lower than the target preheating temperature and different from each other in each of the plurality of sub-smoking intervals.
9. An aerosol-generating device according to claim 8, wherein, Each of the plurality of sub-smoking intervals comprises: A third section for reducing the temperature of the induction heating element to the target smoking temperature, and A fourth interval in which the target smoking temperature after the third interval is maintained, Wherein the control unit estimates the temperature of the induction heating element based on the intensity of the induction magnetic field sensed in the fourth section.
10. The aerosol-generating device according to claim 1, further comprising: a shielding member for blocking the induced magnetic field generated in the coil from being discharged to the outside, Wherein the shielding member surrounds at least a portion of an outer peripheral surface of the coil.

Description

Aerosol generating device Technical Field The present disclosure relates to an aerosol-generating device, and more particularly, to an aerosol-generating device capable of accurately estimating a temperature of a heating element in a non-contact manner. Background Recently, the need for alternative methods for overcoming the disadvantages of conventional cigarettes is increasing. For example, there is an increasing demand for systems that utilize aerosol-generating devices to heat an aerosol-generating substrate to generate an aerosol (rather than methods that utilize burning cigarettes to generate an aerosol). Such an aerosol-generating device employs a heating manner different from a conventional heating manner in which a heater formed of a resistive element is arranged inside or outside a cigarette and the cigarette is heated by supplying electric power to the heater. As an example, studies on the way to heat cigarettes by induction heating are actively underway. The induction heating method may measure the temperature of the induction heating body by directly contacting the temperature sensor to the inside or outside of the induction heating body. However, in the temperature sensing method of this contact method, since the temperature sensor and the induction heating element are arranged in contact, there is a possibility that the temperature sensor is damaged due to the heating of the induction heating element. In order to solve such a problem, a method of sensing the temperature of the induction heating element in a non-contact manner has been proposed, but the conventional non-contact temperature sensing method senses the temperature of the induction heating element based only on any one of a direct current output from a battery and an alternating current supplied to a coil, and thus has a problem of inaccuracy. Disclosure of Invention Technical problem The technical problem of the present disclosure is to provide an aerosol-generating device capable of accurately estimating the temperature of a heating element in a non-contact manner. The technical problems of the present disclosure are not limited to the above, and other technical problems may be inferred from the following examples. Technical proposal An aerosol-generating device according to one aspect includes a power supply that supplies direct-current power, a power conversion unit that converts the direct-current power into alternating-current power, a coil that generates an induction magnetic field by the alternating-current power, an induction heating element that is heated by the induction magnetic field, a magnetic field sensing unit that senses the intensity of the induction magnetic field, and a control unit that estimates the temperature of the induction heating element based on the intensity of the induction magnetic field. Technical effects The aerosol-generating device of the present disclosure has the effect of significantly reducing the likelihood of damage to the temperature sensor as compared to contact-wise temperature sensing techniques. Further, the aerosol-generating device does not use the electric power supplied to the coil as a main means of estimating the temperature, but estimates the temperature of the induction heating element based on the magnetic field actually output from the coil, and therefore can accurately estimate the temperature. Further, the aerosol-generating device does not use the electric power supplied to the coil as a main means of estimating the temperature, but uses it only as a condition for acquiring the magnetic field strength, and therefore does not require a high-sensitivity current sensor. Therefore, the temperature of the induction heating element can be accurately estimated while reducing the manufacturing cost. Further, in the case where the temperature of the induction heating element is estimated using only the magnetic field actually output from the coil, there is a problem in that the magnetic field strength in the initial section of the preheating section does not coincide with the temperature of the actual induction heating element. The aerosol-generating device of the present disclosure does not estimate the temperature using the power condition supplied to the coil in the initial section of the warm-up section, but estimates the temperature of the induction heating element in a period in which the temperature of the induction heating element is constant in the later section of the warm-up section, and thus can estimate the temperature of the induction heating element more accurately. Further, the aerosol-generating device is capable of gradual warm-up without simultaneously supplying the maximum electric power to the coil in the initial section of the warm-up section, and therefore can prevent damage to the apparatus due to overheating of the induction heating element in the section where the temperature cannot be estimated. The effects of the invention are not limited to those exemp