Patent Publication Number: US-2023143680-A1

Title: Aerosol delivering device and aerosol generating device including the same

Description:
TECHNICAL FIELD 
     One or more embodiments relate to an aerosol delivering device and an aerosol generating device including the same, and more particularly, to an aerosol delivering device in which some of a plurality of cartridges are installed, and an aerosol generating device including the same. 
     BACKGROUND ART 
     Recently, the demand for alternative methods to overcome the shortcomings of general aerosol generating articles has increased. For example, there is an increasing demand for a method of generating aerosol with a non-combustion method. 
     DISCLOSURE OF INVENTION 
     Technical Problem 
     There is a demand for an aerosol generating device than can be easily used and carried and can generate an aerosol of good quality. 
     Solution to Problem 
     One or more embodiments of the present disclosure provide an aerosol generating device that may solve the above described problems. 
     One or more embodiments of the present disclosure include an aerosol generating device that may be easily used and carried. One or more embodiments also include an aerosol generating device that may generate an aerosol of good quality capable of satisfying various needs of consumers. 
     Technical goals to be achieved by embodiments of the present disclosure are not limited to the above-described goals, and goals that are not mentioned will be clearly understood by one of ordinary skill in the art from the present specification and the accompanying drawings. 
     According to an aspect of the present disclosure, an aerosol generating device includes an aerosol delivering device including a first cartridge in which a first material for generating an aerosol is accommodated, and a second cartridge which is arranged outside or inside the first cartridge to be rotated with respect to the first cartridge and in which a second material for passing an aerosol generated from the first material is accommodated, and an atomizer that is connected to the first cartridge and atomizes the first material to generate an aerosol and to deliver the aerosol to the second cartridge. 
     According to another aspect of the present disclosure, an aerosol delivering device includes a first cartridge in which a first material for generating an aerosol is accommodated, and a second cartridge which is arranged outside or inside the first cartridge to be rotated with respect to the first cartridge and in which a second material for passing the aerosol generated from the first material is accommodated. 
     Advantageous Effects of Invention 
     An aerosol generating device according to one or more embodiments may be convenient to carry and use because a first cartridge for accommodating a first material and a second cartridge for accommodating a second material are integrated with each other in a single device. 
     In addition, the chambers of the second cartridge may contain different types of second materials. A user may select one of the chambers to select a desired second material, thereby freely enjoying an aerosol having various flavors according to the user&#39;s preference. 
     In addition, because a usage chamber currently in use may be identified based on a signal of a position sensor, reliable and stable control of the aerosol generating device is possible. Also, information about the usage chamber may be provided to the user so that the convenience of use may be increased. 
     In addition, even if the first cartridge of the aerosol generating device is designed to contain a large amount of the first material, the relative positions of the first cartridge and the second cartridge may be automatically changed by a driving device to select the chamber used for supplying the aerosol or to adjust the position of the chamber to a new position, the second material may be replaced with a new second material without replacing the second cartridge including the second material. 
     In addition, because a distance between the second cartridge and an atomizer in the aerosol generating device is reduced, an aerosol generated in the atomizer may be quickly and directly delivered to the second cartridge so that the aerosol generating device may provide an aerosol of good quality to the user. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG.  1    is a perspective view of an aerosol generating device according to an embodiment. 
         FIG.  2    is an exploded view schematically illustrating a coupling relationship between components of the aerosol generating device according to the embodiment shown in  FIG.  1   . 
         FIG.  3    is a longitudinal cross-sectional view of the aerosol generating device according to the embodiment shown in  FIG.  1   . 
         FIG.  4    is a perspective view schematically illustrating some components of the aerosol generating device according to the embodiment shown in  FIG.  1   . 
         FIG.  5    is a longitudinal cross-sectional view of an aerosol generating device according to another embodiment. 
         FIG.  6    is a perspective view of an aerosol generating device according to another embodiment. 
         FIG.  7    is a perspective view illustrating some components of the aerosol delivering device according to the embodiment shown in  FIG.  6   . 
         FIG.  8    is a longitudinal cross-sectional view of the aerosol generating device according to the embodiment shown in  FIG.  6   . 
         FIG.  9    is a block diagram schematically illustrating some components of the aerosol generating device according to the embodiment shown in  FIG.  6   . 
         FIG.  10    is a latitudinal cross-sectional view illustrating an operating state of an aerosol delivering device according to another embodiment. 
         FIG.  11    is a latitudinal cross-sectional view illustrating another operating state of the aerosol delivering device according to the embodiment shown in  FIG.  10   . 
         FIG.  12    is a latitudinal cross-sectional view of an aerosol delivering device according to another embodiment. 
         FIG.  13    is a latitudinal cross-sectional view of an aerosol delivering device according to another embodiment. 
         FIG.  14    is a longitudinal cross-sectional view of an aerosol generating device according to another embodiment. 
         FIG.  15    is an exploded view schematically illustrating a coupling relationship between components of an aerosol delivering device according to another embodiment. 
         FIG.  16    is a longitudinal cross-sectional view of an aerosol generating device including the aerosol delivering device according to the embodiment shown in  FIG.  15   . 
         FIG.  17    is a flowchart schematically illustrating a method of generating an aerosol by using the aerosol generating device according to the embodiments shown in  FIGS.  6  through  16   . 
     
    
    
     BEST MODE FOR CARRYING OUT THE INVENTION 
     An aerosol generating device according to an embodiment may include an aerosol delivering device including a first cartridge configured to accommodate a first material for generating an aerosol; and a second cartridge rotatably coupled to the first cartridge, configured to accommodate a second material, and arranged such that the aerosol generated from the first material passes through the second material; and an atomizer connected to the first cartridge and configured to generate the aerosol by atomizing the first material and deliver the aerosol to the second cartridge. 
     The second cartridge may include a single chamber that extends in a rotation direction of the second cartridge and accommodates the second material 
     The second cartridge may include a plurality of chambers sequentially arranged in a rotation direction of the second cartridge to accommodate the second material. 
     The aerosol generating device may further include a driving device configured to rotate the second cartridge, wherein the atomizer includes a delivery hole through which the aerosol generated from the first material is delivered to the second cartridge, and the second cartridge may be rotated by the driving device so that the aerosol delivered from the delivery hole passes through at least one of the chambers of the second cartridge. 
     A relative position of the second cartridge with respect to the first cartridge may be changed so that a position of one of the chambers is aligned with a position of the delivery hole. 
     A relative position of the second cartridge with respect to the first cartridge may be changed so that adjacent chambers from among the chambers simultaneously overlap the delivery hole. 
     The atomizer may be detachably coupled to the aerosol delivering device and atomizes the first material supplied from the first cartridge to generate an aerosol, and the atomizer may include a delivery hole through which the aerosol is delivered to the second cartridge. 
     The aerosol generating device may further include a driving device configured to rotate the second cartridge with respect to the first cartridge and a controller configured to change a rotation position of the second cartridge with respect to the first cartridge. 
     The aerosol generating device may further include a position sensor configured to detect the relative position of the second cartridge with respect to the first cartridge. 
     The aerosol generating device may further include a handle that is operable by a user so as to change a relative position of the second cartridge with respect to the first cartridge. 
     The atomizer may include a delivery body of a porous material absorbing and holding the first material of the first cartridge, and a heater printed on the delivery body or formed integrally with the delivery body to generate heat by electricity applied from the outside. 
     The second cartridge may be arranged outside the first cartridge, the atomizer may deliver an aerosol generated from the first material to an outer surface of the first cartridge, and the aerosol generated from the first material of the first cartridge may move along at least a portion of the outer surface of the first material. 
     An aerosol delivering device according to another embodiment may include a first cartridge in which a first material for generating an aerosol is accommodated, and a second cartridge rotatably coupled to the first cartridge, configured to accommodate a second material, and arranged such that the aerosol generated from the first material passes through the second material. 
     The second cartridge may be arranged outside the first cartridge to surround the first cartridge, at least a portion of the first cartridge may include a transparent material so that the remaining amount of the first material is viewable through the transparent material, and the second cartridge may include a transparent window through which the transparent material of the first cartridge is viewable from outside of the second cartridge. 
     MODE FOR THE INVENTION 
     With respect to the terms used to describe the various embodiments of the present disclosure, general terms which are currently and widely used are selected in consideration of functions of structural elements in the various embodiments of the present disclosure. However, the meaning of the terms can be provided according to intention, a judicial precedence, the appearance of a new technology, and the like. In addition, in certain cases, a term which is not commonly used can be selected. In such a case, the meaning of the term will be described in detail at the corresponding portion in the description of the present disclosure. Therefore, the terms used to describe the various embodiments of the present disclosure should be defined based on the meaning of the terms and the descriptions provided herein. 
     In addition, unless explicitly described to the contrary, the word “comprise” and variations such as “comprises” or “comprising” will be understood to imply the inclusion of stated elements but not the exclusion of any other elements. In addition, the terms “-er”, “-or”, and “module” described in the specification mean units for processing at least one function and/or operation and can be implemented by hardware components or software components and combinations thereof. 
     As used herein, expressions such as “at least one of,” when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list. For example, the expression, “at least one of a, b, and c,” should be understood as including only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c. 
     If one component or layer is mentioned to be “over,” “above,” “connected to,” or “combined with” another component or layer, the one component or layer is arranged to be over, above, connected to, or combined with the other component or layer with or without an intervening component(s) or layer(s). In contrast, if one component or layer is mentioned to be “directly over,” “directly above,” “directly connected to,” or “directly combined with” another component or layer, there is no additional components or layers between the components or layers. In the disclosure, the same reference numbers may indicate the same components. 
     Hereinafter, the present disclosure will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the present disclosure are shown such that one of ordinary skill in the art may easily work the present disclosure. The disclosure may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. 
     In addition, terms used in the present specification are for describing the embodiments and are not intended to limit the embodiments. In the present specification, the singular form also includes the plurality form unless specifically stated in the phrase. 
     While such terms as “first,” “second,” etc., may be used to describe various components, such components must not be limited to the above terms. The above terms are used only to distinguish one component from another. 
     Throughout the specification, the “longitudinal direction” of a component may be a direction in which the component extends along an axis in one direction of the component, wherein the axis in one direction of the component extends longer than an axis in the other direction of the component crossing the axis in one direction of the component. 
       FIG.  1    is a perspective view of an aerosol generating device according to an embodiment,  FIG.  2    is an exploded view schematically illustrating a coupling relationship between components of the aerosol generating device according to the embodiment shown in  FIG.  1   , and  FIG.  3    is a longitudinal cross-sectional view of the aerosol generating device according to the embodiment shown in  FIG.  1   . 
     The aerosol generating device according to the embodiment shown in  FIGS.  1  through  3    may include an aerosol delivering device  5  for delivering an aerosol to a user, and an atomizer  50   a  connected to the aerosol delivering device  5 . The aerosol generating device may further include a main body  70   a  detachably connectable to the atomizer  50   a.    
     The aerosol generating device according to the embodiment shown in  FIGS.  1  through  3    may supply an aerosol to the user. For example, the aerosol generating device may heat an aerosol generating material by using a heater operated with electricity, an induction magnetic field, or ultrasonic waves so as to generate an aerosol. 
     The aerosol delivering device  5  may deliver an aerosol generated by the atomizer  50   a . The aerosol delivering device  5  may or may not include the atomizer  50   a . In this regard, according to embodiments, the aerosol delivering device  5  and the atomizer  50   a  may be collectively referred to as “aerosol delivering device.” The atomizer  50   a  may include a position fixing surface  10   s  which has different curvature than a cylindrical surface of the atomizer  50   a . The position fixing surface  10   s  may perform the function of determining the position of the aerosol delivering device  5  when the aerosol delivering device  5  is coupled to the aerosol generating device. 
     The aerosol delivering device  5  may include a first cartridge  10  in which a first material  12  for generating the aerosol is accommodated, and a second cartridge  20  arranged outside the first cartridge  10  to be rotated with respect to the first cartridge  10 . 
     Although the overall shape of the aerosol delivering device  5  and the aerosol generating device in the embodiment shown in  FIGS.  1  through  3    is a cylindrical shape, embodiments are not limited by the shape of the aerosol delivering device  5  and the shape of the aerosol generating device. For example, a latitudinal cross-sectional shape of at least one of the aerosol delivering device  5  and the aerosol generating device may be other shapes such as a polygonal shape or an oval shape. 
     The first cartridge  10  and the second cartridge  20  may be coupled to each other to form the aerosol delivering device  5 , and may be handled as a single part. Thus, after all the materials accommodated in the first cartridge  10  and the second cartridge  20  are exhausted, the aerosol delivering device  5  including the first cartridge  10  and the second cartridge  20  may be replaced with a new one. 
     Embodiments are not limited by the above-described replacement method of the aerosol delivering device  5 . For example, at least one of the first cartridge  10  and the second cartridge  20  may be separated from the aerosol delivering device  5  and replaced individually. 
     The first cartridge  10  of the aerosol delivering device  5  may be connected to the atomizer  50   a  and may supply the first material  12  to the atomizer  50   a . The aerosol generated from the atomizer  50   a  may be discharged toward the outer surface of the first cartridge  10  through a delivery hole  11 . The aerosol discharged through the delivery hole  11  may move along the outer surface of the first cartridge  10 . 
     Here, ‘moving along the outer surface of the first cartridge  10 ’ does not necessarily mean that the aerosol moves while coming into contact with the outer surface of the first cartridge  10 . That is, the aerosol may move along the extension direction of the first cartridge  10  (i.e., upward) without contacting the first cartridge  10 . 
     The second cartridge  20  may accommodate a second material  22  such that the aerosol discharged from the atomizer  50   a  passes through the second material  22  before being inhaled by the user. The second cartridge  20  may include a plurality of chambers  21  that are separated from each other by a barrier wall  20   w , and the second material  22  may be accommodated in each of the plurality of chambers  21 . The plurality of chambers  21  of the second cartridge  20  may be sequentially arranged in the rotation direction of the second cartridge  20 . 
     Embodiments are not limited by the number of chambers  21  shown in  FIG.  1   . For example, one or two chambers  21  may be installed. 
     The second cartridge  20  arranged outside the first cartridge  10  may be rotated with 
     respect to the first cartridge  10 . Referring to  FIG.  2   , the second cartridge  20  may be coupled to a rail  50   s  formed along a circumferential edge of a top end of the atomizer  50   a  to make a rotational motion around the first cartridge  10 . The first cartridge  10  may serve as a rotation shaft that supports the second cartridge  20  for the rotational motion of the second cartridge  20 . 
     When the aerosol generating device in an assembled state as shown in  FIG.  1    by hand, a user may hold the main body  70   a  of the aerosol generating device with one hand and rotate the second cartridge  20  with the other hand, so that the second cartridge  20  may be rotated around the first cartridge  10 . 
     The aerosol generating device may include a mouthpiece  26  that is connected to an upper end of the second cartridge  20 . The mouthpiece  26  includes an outlet  26   e  for discharging the aerosol which has passed through the second material  22  of the second cartridge  20  to the outside, thereby supplying the aerosol to the user. 
     The second cartridge  20  may include a mark  91  on an outer surface of the second cartridge  20 . The mark  91  of the second cartridge  20  may be arranged at a position corresponding to each of the plurality of chambers  21  inside the second cartridge  20 . 
     The atomizer  50   a  may include a mark  92  that may be located on an outer surface of the atomizer  50   a  and may be used as a reference position with respect to the mark  91  of the second cartridge  20 . Thus, the user may rotate the second cartridge  20  with respect to the first cartridge  10  so that the mark  91  of the second cartridge  20  may coincide with the mark  92  of the atomizer  50   a  and the position of at least one of the chambers may be aligned with the position of the delivery hole  11  through which the aerosol is discharged. 
     Also, the user may check the positions of the mark  91  of the second cartridge  20  and the mark  92  of the atomizer  50   a  to identify a chamber through which the aerosol currently passes, among the chambers  21  of the second cartridge  20 . 
     The first cartridge  10  may accommodate the first material  12  therein. The first material  12  may be, for example, a liquid or gel. The first material  12  may be in a liquid state and maintained in a porous material such as a sponge or cotton inside the first cartridge  10 . 
     The first material  12  may be a liquid and may include, for example, a tobacco-containing material or a non-tobacco material including a volatile tobacco flavor component. 
     The first material  12  may include, for example, water, a solvent, ethanol, plant extract, spices, flavorings, or a vitamin mixture, 
     Examples of the spices of the first material  12  may include menthol, peppermint, spearmint, and various fruit-flavored ingredients, but are not limited thereto. The flavorings may include ingredients capable of providing various flavors or tastes to the user. 
     Vitamin mixtures of the first material  12  may be a mixture of at least one of vitamin A, vitamin B, vitamin C, and vitamin E, but are not limited thereto. 
     Also, the first material  12  may include an aerosol forming substance, such as glycerin and propylene glycol. 
     Referring to  FIG.  2   , the first cartridge  10  may have a cylindrical shape extending long in a longitudinal direction. The first cartridge  10  may include a storage  10   p  for accommodating the first material  12  therein, and the atomizer  50   a  installed at a lower end of the storage  10   p . The main body  70   a  having an electrical terminal  50   d  exposed upwards may be coupled to a lower end of the atomizer  50   a.    
     The second cartridge  20  may be coupled to the first cartridge  10  in a rotatable manner. A cylindrical wall  20   p  that extends in the longitudinal direction and corresponds to the outer shape of the first cartridge  10  may be formed inside the second cartridge  20 . When the first cartridge  10  is inserted into the cylindrical wall  20   p  of the second cartridge  20 , coupling of the first cartridge  10  to the second cartridge  20  may be completed, and the second cartridge  20  may be rotated with respect to the first cartridge  10 . 
     A plurality of chambers  21  that are separated by the barrier wall  20   w  and accommodate the second material  22  may be formed inside the second cartridge  20 . An upper hole  20   h  through which each of the chambers  21  for accommodating the second material  22  is opened upwards, may be formed in a top end of the second cartridge  20 . 
     An intermediate cover  29  may be coupled to an upper portion of the second cartridge  20  in a state where the second cartridge  20  is coupled to the outside of the first cartridge  10 . The intermediate cover  29  may include a connection hole  29   p  formed at a position corresponding to the upper hole  20   h  of the second cartridge  20 , and a central hole  29   h  formed at a center of the intermediate cover  29  such that an upper flange  10   a  of the first cartridge  10  passes through the central hole  29   h . The intermediate cover  29  may make a rotational motion together with the second cartridge  20 , so that the coupled state of the second cartridge  20  and the first cartridge  10  may be stably maintained during rotation of the second cartridge  20 . 
     When the second cartridge  20  and the intermediate cover  29  are coupled to the first cartridge  10 , the upper flange  10   a  of the first cartridge  10  may protrude past the upper side of the intermediate cover  29 . A fastening screw  28   s  may penetrate the upper cover  28  and may be coupled to a screw hole  10   b  of the upper flange  10   a  of the first cartridge  10 , so that the upper cover  28  may be coupled to the upper flange  10   a  of the first cartridge  10 . 
     While the intermediate cover  29  and the second cartridge  20  are rotated with respect to the first cartridge  10 , the upper cover  28  may not be rotated but may be maintained coupled to the upper flange  10   a  of the first cartridge  10 . Accordingly, while the second cartridge  20  is rotated with respect to the first cartridge  10 , the second cartridge  20  may not deviate upward from the first cartridge  10  and the coupled state of the second cartridge  20  and the first cartridge  10  may be stably maintained. 
     The upper cover  28  may include a discharge hole  28   a  through which the aerosol passing through the second material  22  of the second cartridge  20  is delivered to the mouthpiece  26 . 
     Referring to  FIG.  3   , a controller  70  may be installed inside the main body  70   a . The controller  70  may include a battery for supplying power to the atomizer  50   a  and a control chip or control circuit board for controlling the operation of the atomizer  50   a.    
     The atomizer  50   a  may include a heater  52  that absorbs the first material  12  from the first cartridge  10 , maintains the absorbed first material  12  and generates heat by electricity supplied from the outside, thereby heating the first material  12  to generate an aerosol. The heater  52  may be electrically connected to the electrical terminal  50   d  of the main body  70   a  through a wiring  51  and a connection terminal  50   t.    
     The atomizer  50   a  may generate an aerosol by converting a phase of the first material  12  (i.e., an aerosol generating material) into a gaseous phase. The aerosol may refer to a gas in which vaporized particles generated from the aerosol generating material are mixed with air. The aerosol generated from the atomizer  50   a  may sequentially pass through a discharge hole  50   h  (see  FIG.  4   ), a delivery passage  50   p , and the delivery hole  11  and may be discharged toward the outer surface of the first cartridge  10 . 
       FIG.  4    is a perspective view schematically illustrating some components of the aerosol generating device according to the embodiment shown in  FIG.  1   . In particular,  FIG.  4    illustrates a detailed example of the heater  52  that may be used in the aerosol generating device. 
     The heater  52  of the atomizer  50   a  may include a delivery body  52   c  made of a porous material that may absorb and accommodate (i.e., hold) the first material  12  of the first cartridge  10 , and a heater wiring  52   h  formed integrally with the delivery body  52   c  or printed on the surface of the delivery body  52   c.    
     The porous material may include, for example, a porous ceramic material, a porous plastic material, a porous glass fiber material, or the like. 
     The delivery body  52   c  may have a cup shape that may accommodate the first material  12  in a liquid state, as shown in  FIG.  4   . However, embodiments are not limited by the shape of the delivery body  52   c . The delivery body  52   c  may have, for example, a bed structure in which left and right wall surfaces are exposed to the outside to increase a contact area with air. 
     A space for creating an atmosphere for generating an aerosol may be formed inside the delivery body  52   c . The space inside the delivery body  52   c  may serve as an aerosol chamber in which an aerosol generating action occurs. The delivery body  52   c  may include a discharge hole  50   h  for discharging the aerosol generated in the aerosol chamber to the outside of the aerosol chamber by connecting the inside of the aerosol chamber to the outside. The aerosol discharged through the discharge hole  50   h  may be delivered toward the outer surface of the first cartridge  10 , and the aerosol may pass through the second material  22  of the second cartridge  20  located outside the first cartridge  10  and then may be supplied to the user. 
     The heater wiring  52   h  may be formed in the delivery body  52   c  by printing an electric resistive heating element material along the surface of the delivery body  52   c . Alternatively, the heater wiring  52   h  may be integrally formed with the delivery body  52   c  when the delivery body  52   c  is molded. For example, the heater wiring  52   h  and the delivery body  52   c  may be integrally molded by insert molding. 
     Because the wiring  51  is electrically connected to the heater wiring  52   h , electricity may be supplied to the heater wiring  52   h  via the wiring  51 . 
     In the above-described embodiment, the heater  52  of the atomizer  50   a  includes an electric resistive heating element, but embodiments are not limited thereto. For example, The atomizer  50   a  may generate an aerosol by an ultrasonic wave vibration method, or may generate an aerosol by an induction heating method. 
     Also, the heater  52  may be modified into various shapes other than the cup shape as described above. For example, the heater  52  of the atomizer  50   a  may include a wick that absorbs and holds the first material  12 , and a wire-type or coil-type heating element may be wound on the wick or positioned adjacent to the wick to heat the first material  12  to generate an aerosol. 
     Referring to  FIGS.  2  and  3   , the mouthpiece  26  may be coupled to an upper portion of the second cartridge  20 . The mouthpiece  26  may include the outlet  26   e  for discharging the aerosol which has passed through the second material  22  of one of the chambers  21  to the outside. 
     The atomizer  50   a  may include the delivery hole  11  through which the aerosol generated from the first material  12  is delivered to the outer surface of the first cartridge  10 . Because the delivery hole  11  faces the second material  22  of the second cartridge  20 , the aerosol discharged through the delivery hole  11  may flow upward along the outer surface of the first cartridge  10  by passing through the second material  22  of the second cartridge  20 . 
     The aerosol that reaches the upper end of the second material  22  inside the second cartridge  20  after passing through the second material  22  may be discharged to the outside through the mouthpiece  26 . 
     The second material  22  may be in a solid state and may be in the form of, for example, powder or granules (i.e., a collection of small-sized particles). 
     The second material  22  may include, for example, a tobacco-containing material including a volatile tobacco flavor component, one or more additives (e.g., flavors, a wetting agent, and/or organic acid), or a flavored material (e.g., menthol or a moisturizer). Also, the second material  22  may include plant extract, spices, flavorings, a vitamin mixture, or a mixture of these ingredients. 
     Examples of the spices of the second material  22  may include menthol, peppermint, spearmint, and various fruit-flavored ingredients, but are not limited thereto. 
     The flavorings of the second material  22  may include ingredients capable of providing various flavors or tastes to the user. 
     The vitamin mixture of the second material  22  may be a mixture of at least one of vitamin A, vitamin B, vitamin C, and vitamin B, but are not limited thereto. 
     When the aerosol delivering device  5  and the aerosol generating device including the same as described above are used, the user may rotate the second cartridge  20  with respect to the first cartridge  10  so as to adjust the rotation position of the second cartridge  20  so that the position of at least one of the chambers  21  of the second cartridge  20  may be placed in a position corresponding to the delivery hole  11  of the atomizer  50   a.    
     The user may inhale the aerosol through the mouthpiece  26  in a state in which at least one of the chambers  21  of the second cartridge  20  is connected to the delivery hole  11  of the atomizer  50   a.    
     An aerosol generating device including the aerosol delivering device  5  may be handled as one device in which the first cartridge  10  for accommodating the first material  12  and the second cartridge  20  for accommodating the second material  22  are integrated with each other, and thus it is convenient to carry and use the aerosol generating device. 
     In addition, the second cartridge  20  may be rotated to select a chamber for supplying the aerosol from among the chambers  21 , so the second material  22  may be changed without replacing the second cartridge  20 . 
     In addition, the plurality of chambers  21  of the second cartridge  20  may include different types of second materials  22 . For example, the chambers  21  may include the second materials  22  having different particle sizes or different flavors, When the chambers  21  include different types of second materials  22 , the user may select one of the chambers  21  containing the second material  22  of the desired flavor, thereby freely enjoying the aerosol having various flavors. 
     In addition, because the second cartridge  20  is located outside the first cartridge  10 , a distance between the second cartridge  20  and the atomizer  50   a  in the aerosol generating device is reduced so that the aerosol generated in the atomizer  50   a  may be quickly and directly delivered to the second cartridge  20 . Accordingly, the aerosol generating device and the aerosol delivering device may supply an aerosol of good quality to the user. 
       FIG.  5    is a longitudinal cross-sectional view of an aerosol generating device according to another embodiment. 
     The configuration of the aerosol generating device according to the embodiment shown in  FIG.  5    is generally similar to the configuration of the aerosol generating device according to the embodiment shown in  FIG.  3   , but the installation position of the atomizer  50   a  is modified. The atomizer  50   a  may be installed at a lower end of the aerosol delivering device  5  and may form a part of the aerosol delivering device  5 . 
     The atomizer  50   a  may include an absorber  53 , a wick  54 , and a heater  52 . The absorber  53  may absorb the first material  12  from a lower portion of the first cartridge  10  and deliver the first material  12  to the wick  54 . The wick  54  connected to the absorber  53  may absorb and hold the first material  12 . The heater  52  may heat the wick  54  to generate an aerosol. 
     The absorber  53  and the wick  54  may include, for example, a material such as cotton fiber, ceramic fiber, glass fiber, and porous ceramic, and may include a mesh material. 
     The heater  52  may be an element for heating the first material  12  held in the wick  54 . For example, the heater  52  may be a metal hot wire, a metal hot plate, a ceramic heater, and the like, and embodiments are not limited thereto. Also, the heater  52  may include an electrically conductive filament such as a nichrome wire and may include a structure wound around the wick  54  to surround the wick  54 . When current is supplied to the heater  52 , the heater  52  may generate heat, and the heater  52  may deliver heat to the first material  12  held in the wick  54  so that an aerosol may be generated. 
     The atomizer  50   a  may be empty inside. The inner space of the atomizer  50   a  may serve as an aerosol chamber in which air is supplied to the heater  52  and the wick  54 , thereby creating an atmosphere for generating an aerosol. 
     The aerosol chamber inside the atomizer  50   a  may be connected to the delivery hole  11  through which the aerosol generated in the atomizer  50   a  is delivered to the outer surface of the first cartridge  10 . Thus, the aerosol generated in the atomizer  50   a  may pass through the delivery hole  11  and then may be delivered to the second material  22  of the second cartridge  20  located outside the first cartridge  10 . 
     The main body  70   a  may be detachably connected to the atomizer  50   a . The controller  70  including a battery for supplying power to the atomizer  50   a  and a control chip or control circuit board for controlling the operation of the atomizer  50   a  may be installed in the main body  70   a . The heater  52  of the atomizer  50   a  may be electrically connected to the electrical terminal  50   d  of the main body  70   a  by the wiring  51 . 
       FIG.  6    is a perspective view of an aerosol generating device according to another embodiment,  FIG.  7    is a perspective view illustrating some components of the aerosol delivering device according to the embodiment shown in  FIG.  6   , and  FIG.  8    is a longitudinal cross-sectional view of the aerosol generating device according to the embodiment shown in  FIG.  6   . 
     The aerosol generating device according to the embodiment shown in  FIGS.  6  through  8    may generate an aerosol and may heat an aerosol generating material by using a heater operated with electricity, an induction magnetic field, or ultrasonic waves so as to generate an aerosol. 
     Referring to  FIG.  8   , the aerosol generating device may include an aerosol delivering device  5  and an atomizer  50   a.    
     The aerosol delivering device  5  may include a first cartridge  10  in which a first material  12  is accommodated and a second cartridge  20  in which a second material  22  is accommodated. The aerosol generated from the first material  12  may move along at least a portion of the outer surface of the first cartridge  10  such that the aerosol generated from the first material  12  may pass through the second material  22  before being discharged to the outside. The second cartridge  20  located outside the first cartridge  10  may be rotated with respect to the first cartridge  10 . 
     The atomizer  50   a  is connected to the first cartridge  10 , atomizes the first material  12  to generate an aerosol and delivers the aerosol toward the outer surface of the first cartridge  10 . 
     The first cartridge  10  and the second cartridge  20  may be integrated with each other so as to be handled as one part and to form the aerosol delivering device  5 . 
     Referring to  FIG.  6   , the aerosol generating device may include a case  7  including an accommodation passage  7   a  for accommodating the aerosol delivering device  5 . The case  7  may include a display device  7   f  for providing information to a user and a display lamp  7   d  for providing a notification related to an operating state of the aerosol generating device to the user. The display device  7   f  and the display lamp  7   d  may be arranged on an outer surface of the case  7 . The display device  7   f  and the display lamp  7   d  are examples of information generators for performing a function of notifying various types of notifications to the user, and an information generator may be in the form of, for example, a speaker or a vibration generator. 
     In addition, the case  7  may include an input device  95  that may be manipulated by the user and generates a user input signal by detecting the user&#39;s manipulation. 
     In the embodiment shown in  FIGS.  6  through  8   , the case  7  may approximately have a cuboid shape, and the aerosol delivering device  5  may have a cylindrical shape. However, embodiments are not limited to the shapes of the case  7  and the aerosol delivering device  5 . For example, the case  7  may have other shapes such as a cylindrical shape that extends in the axial direction of the aerosol delivering device  5 , a cylindrical shape having an elliptical cross-section, a flat cylindrical shape, a regular cube, and a rectangular parallelepiped. In addition, the aerosol delivering device  5  may have other shapes such as a cuboid, a regular cube, and the like. 
     The first cartridge  10  and the second cartridge  20  may be coupled to each other in such a way that relative positions of the first cartridge  10  and the second cartridge  20  may be changed. That is, the second cartridge  20  may be rotated relative to the first cartridge  10  so that the relative positions of the first cartridge  10  and the second cartridge  20  may be changed. The atomizer  50   a  connected to a lower end of the aerosol delivering device  5  may also have a cylindrical shape as a whole. The atomizer  50   a  may include a position fixing surface  10   s  that extends in a direction different from the extension direction of the cylindrical surface. 
     The accommodation passage  7   a  of the case  7  may be formed as a hollow cylindrical path that extends long to accommodate the aerosol delivering device  5 . A position maintenance surface  7   s  may be formed on at least a portion of the accommodation passage  7   a . The position maintenance surface  7   s  may extend in a direction different from the extension direction of the inner wall surface of the accommodation passage  7   a , and may have a shape corresponding to the position fixing surface  10   s  of the first cartridge  10 . 
     When the aerosol delivering device  5  is accommodated in the accommodation passage  7   a  of the case  7 , the position maintenance surface  7   s  and the position fixing surface  10   s  are in contact with each other, and accordingly, the positions of the first cartridge  10  and the atomizer  50   a  with respect to the case  7  may be stably maintained. That is, when the second cartridge  20  is rotated with respect to the first cartridge  10 , the position fixing surface  10   s  of the atomizer  50   a  connected to the first cartridge  10  is supported by the position maintenance surface  7   s  so that the first cartridge  10  and the atomizer  50   a  do not rotate but are fixed to the case  7 . 
     In addition, when the aerosol delivering device  5  is inserted into the accommodation passage  7   a  of the case  7 , the position maintenance surface  7   s  and the position fixing surface  10   s  may serve to align an axial center of the aerosol delivering device  5  with an axial center of the accommodation passage  7   a . That is, the position fixing surface  10   s  of the aerosol delivering device  5  and the position maintenance surface  7   s  of the accommodation passage  7   a  need to correspond to each other so that the aerosol delivering device  5  may be inserted into the accommodation passage  7   a  of the case  7 . 
     The case  7  may include an electrical terminal  50   d  that is installed at an end of the accommodation passage  7   a  and supplies electricity to the atomizer  50   a . When the aerosol delivering device  5  is aligned with respect to the accommodation passage  7   a  so that the position fixing surface  10   s  of the aerosol delivering device  5  and the position maintenance surface  7   s  of the accommodation passage  7   a  correspond to each other, the electrical terminal  50   d  may be accurately connected to the atomizer  50   a.    
     The first cartridge  10  may perform the function of delivering the first material  12  for generating an aerosol to the atomizer  50   a . The first cartridge  10  may accommodate the first material  12  therein. The first material  12  may be, for example, a liquid or gel. The first material  12  may be in a liquid state and maintained in a porous material such as a sponge or cotton inside the first cartridge  10 . 
     Referring to  FIG.  8   , the atomizer  50   a  may include an absorber  53 , a wick  54 , and a heater  52 . 
     The absorber  53  may absorb the first material  12  from a lower portion of the first cartridge  10  and deliver the first material  12  to the wick  54 . 
     The wick  54  may receive the first material  12  from the absorber  53  and holds the first material  12 . 
     The heater  52  may be wound around the wick  54 , or may be positioned adjacent to the wick  54 . The heater may heat the first material  12  so as to generate an aerosol. 
     The atomizer  50   a  may generate an aerosol by converting a phase of the aerosol generating material into a gaseous phase. The aerosol may refer to a gas in which vaporized particles generated from the aerosol generating material are mixed with air. 
     The heater  52  may be an electric resistive heating element that is electrically connected to the electrical terminal  50   d  inside the case  7  by the wiring  51  and generates heat by electricity supplied from the controller  70 . The atomizer  50   a  includes the electric resistive heating element. However, embodiments are not limited by the configuration of the atomizer  50   a . For example, the atomizer  50   a  may generate an aerosol by an ultrasonic method, or by a heating method. 
     In addition, the atomizer  50   a  may perform the function of generating an aerosol from the first material  12  and then delivering the aerosol to the outer surface of the first cartridge  10 . The atomizer  50   a  may include a delivery hole  11  connected to the first cartridge  10 , and the atomizer  50   a  may discharge the aerosol through the delivery hole  11 , so that the aerosol may be delivered to the second cartridge  20 . 
     The second cartridge  20  may be located outside the first cartridge  10  and may be rotated with respect to the first cartridge  10 . The second cartridge  20  may include a plurality of chambers  21  that are separated from each other by a barrier wall  20   w  and are sequentially positioned in the rotation direction of the second cartridge  20 . Each chamber may include a second material  22  such that the aerosol passes through the second material  22 . The second material  22  may be in a solid state and may be in the form of powder or granules (i.e., a collection of small-sized particles). 
     The number of chambers  21  in the second cartridge  20  may be variously modified, For example, only one chamber  21  may be installed in the second cartridge  20 . 
     Referring to  FIG.  7   , the first cartridge  10  may protrude from the atomizer  50   a  and extend upward. When the second cartridge  20  is coupled to the first cartridge  10 , the first cartridge  10  may be inserted into a cylindrical wall  20   p  of the second cartridge  20 . When the first cartridge  10  is inserted into the cylindrical wall  20   p  of the second cartridge  20 , the first cartridge  10  and the second cartridge  20  may be coupled to each other, and the second cartridge  20  may be rotated with respect to the first cartridge  10 . 
     A mouthpiece  26  may include an outlet  26   e  for discharging the aerosol which has passed through at least one second material  22  of the chambers  21  to the outside. The mouthpiece  26  may be coupled to an upper portion of the second cartridge  20 . 
     The relative positions of the first cartridge  10  and the second cartridge  20  may be changed in a state where the first cartridge  10  and the second cartridge  20  are coupled to each other. At least one of the plurality of chambers  21  of the second cartridge  20  may be connected to the delivery hole  11  of the atomizer  50   a . Thus, the aerosol discharged from the delivery hole  11  of the atomizer  50   a  may pass through the second material  22  accommodated in the chamber which is positioned to correspond to the delivery hole  11  of the plurality of chambers  21  of the second cartridge  20 . While the aerosol passes through the second material  22 , the characteristics of the aerosol may be changed. 
     Referring to  FIG.  8   , a controller  70  including a battery for supplying power to the atomizer  50   a  and a control chip or control circuit board for controlling the operation of the atomizer  50   a  may be installed at a lower side of the accommodation passage  7   a  inside the case  7 . 
     The aerosol generating device may include a driving device  60  that generates a driving force to rotate the second cartridge  20 . Referring to  FIGS.  6  and  8   , the driving device  60  may include a motor  61  that is located inside the case  7  and operated by an electrical signal, and a gear  62  that transmits a driving force of the motor  61  to the second cartridge  20 . A gear surface  20   g  may be arranged outside the second cartridge  20  along the rotation direction of the second cartridge  20 . 
     When the aerosol delivering device  5  is mounted on the case  7 , the gear surface  20   g  of the second cartridge  20  and the gear  62  may engage with each other. When the electrical signal of the controller  70  is applied to the motor  61  of the driving device  60 , a shaft of the motor  61  may make a rotational motion, and the driving force of the motor  61  may be transmitted to the gear surface  20   g  of the second cartridge  20  via the gear  62 . Thus, the driving device  60  may perform the function of rotating the second cartridge  20  with respect to the first cartridge  10 . 
     Embodiments are not limited by the configuration of the driving device  60  shown in  FIGS.  6  and  8   . For example, the gear  62  of the driving device  60  may be replaced with various power transmission elements such as a belt, a sprocket, and the like. 
     As aforementioned, at least one of the plurality of chambers  21  of the second cartridge  20  may be connected to the delivery hole  11  of the atomizer  50   a . That is, the aerosol discharged from the delivery hole  11  of the atomizer  50   a  may pass through one or more chambers (e.g., two or more adjacent chambers) from among the plurality of chambers  21 . 
     Referring to  FIGS.  6  and  7   , the second cartridge  20  may include a mark  91  located on an outer surface of the second cartridge  20 . The mark  91  of the second cartridge  20  may be formed at a position corresponding to each of the plurality of chambers  21  inside the second cartridge  20 . 
     The atomizer  50   a  may include a mark  92  that may be used as a reference position with respect to the mark  91  of the second cartridge  20  on an outer surface of the atomizer  50 . Thus, when the mark  91  of the second cartridge  20  is aligned with the mark  92  of the first cartridge  10 , the position of at least one of the chambers may be aligned with the position of the delivery hole  11  of the atomizer  50   a  through which the aerosol is discharged. 
     In addition, the user may check the positions of the mark  91  of the second cartridge  20  and the mark  92  of the atomizer  50   a  to identify a chamber through which the aerosol currently passes, among the chambers  21  of the second cartridge  20 . 
     Referring to  FIG.  7   , a position sensor  97  for identifying the type of the second material  22  included in the chamber through which the aerosol currently passes among the chambers  21  according to the relative positions of the first cartridge  10  and the second cartridge  20  may be installed in the second cartridge  20  and/or the atomizer  50   a . The position sensor  97  may perform the function of detecting the position of at least one of the chambers  21  with respect to the delivery hole  11  to generate a signal. 
     The position sensor  97  may include senders  97   a  arranged in the second cartridge  20  and a receiver  97   b  that is disposed in the atomizer  50   a  and detects the senders  97   a . Embodiments are not limited by the arrangement positions or the number of the senders  97   a  and the receiver  97   b . For example, the senders  97   a  may be arranged in the atomizer  50   a , and the receiver  97   b  may be arranged in the second cartridge  20 . A plurality of senders  97   a  may be arranged to correspond to each of the chambers  21 . 
     When the rotation position of the second cartridge  20  with respect to the first. cartridge  10  is aligned so that at least one of the chambers  21  corresponds to the delivery hole  11 , the position sensor  97  may generate an identification signal indicating the aligned chamber(s). 
     The senders  97   a  and the receiver  97   b  of the position sensor  97  may be implemented by at least one of an optical sensor (e.g., a photocoupler), a magnetic sensor that detects magnetism by using the hall effect, an electric resistance sensor that detects changes in electric resistance, and a switch that generates a signal according to a physical contact. 
     Referring to  FIGS.  6  and  8   , the puff sensor  79   p  may be arranged on a flow path of the aerosol, inside the case  7 . The puff sensor  79   p  may detect the user&#39;s aerosol inhalation based on the flow of the aerosol. For example, the puff sensor  79   p  may be connected to the inner space of the atomizer  50   a , detect the change in pressure or flow rate of air (i.e., mainstream including an aerosol) flowing through the inside of the atomizer  50   a , and generate a signal based on the detected change. The puff sensor  79   p  may be arranged in a pressure detection hole  79   s  connected to the delivery passage  50   p  of the atomizer  50   a.    
     In the aerosol generating device described above, the aerosol discharged from the atomizer  50   a  may enter the chambers  21  of the second cartridge  20  and pass through the second material  22  accommodated in the chambers  21 . The second material  22  may provide flavors to the aerosol. As a result, the aerosol that has passed through the second material  22  may have sufficient flavors and may be discharged to the outside of the aerosol generating device through the mouthpiece  26 . 
     When pre-set conditions are achieved, the controller  70  may operate the driving device  60  to perform the function of changing the relative positions of the first cartridge  10  and the second cartridge  20  so that the aerosol delivered from the first cartridge  10  may pass through at least one of the chambers  21 . For example, the second material  22  contained in the chambers  21  of the second cartridge  20  may have a pre-set usage time in relation to an operation of passing the aerosol, and the preset usage time of the second material  22  may be a pre-set condition. When an actual usage time used to perform the operation of passing the aerosol through the second material  22  reaches the pre-set usage time, the positions of the chambers need to be changed such that the aerosol may pass through a new second material. 
     The controller  70  may change the relative position of the second cartridge  20  with respect to the first cartridge  10  to perform a function of selecting another one or two adjacent chambers of the second cartridge  20  to pass the aerosol. 
     Also, the controller  70  may perform the function of identifying a chamber that is currently aligned to correspond to the position of the delivery hole  11  among the chambers  21  and is in use to pass the aerosol, based on the signal of the position sensor  97 . Hereinafter, the term “usage chamber” may refer to one or more chambers from among the chambers  21 , which are aligned to correspond to the position of the delivery hole  11  and in use to perform a function of passing the aerosol. 
     Referring to  FIG.  7   , stoppers  81   a  and  81   b  may be installed in the atomizer  50   a  and the second cartridge  20  so as to limit changes in the relative positions of the first cartridge  10  and the second cartridge  20 . The stoppers  81   a  and  81   b  may perform the function of limiting a rotational motion of the second cartridge  20  when the chambers  21  of the second cartridge  20  make a relative rotational motion with respect to the first cartridge  10 . 
     When the second cartridge  20  makes a rotational motion in one direction with respect to the first cartridge  10  and the stoppers  81   a  and  81   b  are in contact with each other, the second cartridge  20  may no longer make a rotational motion in the same direction, and the driving device  60  may change the direction of the rotational motion of the second cartridge. 
       FIG.  9    is a block diagram schematically illustrating some components of the aerosol generating device according to the embodiment shown in  FIG.  6   . 
     The controller  70  shown in  FIG.  9    may be implemented by any one of a circuit hoard arranged inside the case  7  shown in  FIGS.  6  and  8   , a semiconductor chip attached to the circuit board, and software installed on the semiconductor chip or circuit board, or a combination thereof. 
     The controller  70  may include an atomization controller  71 , a sensor controller  74 , an information controller  75 , a user input receiver  76 , an input/output controller  73 , a medium determining unit  72 , and a driving controller  77 . 
     The atomization controller  71  controls the atomizer  50   a  to control the generation amount or the temperature of the aerosol. 
     The sensor controller  74  receives signals generated by a temperature sensor  79   t  for detecting the temperature related to the atomizer  50   a , a puff sensor  79   p  for detecting changes in pressure or speed of air generated when the user inhales the aerosol, and the position sensor  97  for detecting the rotation position of the second cartridge  20  with respect to the first cartridge  10 . 
     The information controller  75  controls an information generator  96  for providing information to the user or providing a notification. 
     The user input receiver  76  receives a user input signal from an input device  95  such as a button, a touch screen or an input button for detecting the users input. 
     The input/output controller  73  exchanges data with a storage  78 , such as information about the type of the first material of the first cartridge  10  or the second material of the second cartridge  20 , a temperature profile for controlling the operating temperature of the atomizer  50   a , information about the user, and information about the positions of the chambers  21  with respect to the delivery hole  11  according to changes in the relative positions of the first cartridge  10  and the second cartridge  20 . 
     The medium determining unit  72  determines a usage chamber and the type of a medium (i.e., second material) contained in the usage chamber based on the signal received from the position sensor  97 . 
     The driving controller  77  controls the operation of the driving device  60 . 
     The controller  70  described above may detect the user&#39;s inhalation, thereby initiating or stopping the operation of the atomizer  50   a . Also, the controller  70  may determine the usage chamber and the type of the medium (i.e., second material) contained in the usage chamber based on the signal applied from the position sensor  97 , and may control the operating temperature or operating time of the atomizer  50   a  to be suitable for the type of medium. 
     The controller  70  may determine the usage chamber and the type of the medium contained in the usage chamber based on the signal from the position sensor  97 , and then may output information about the type of the usage chamber (i.e., a pre-set identifier of the usage chamber) to the information generator  96 . The pre-set identifier of the usage chamber may include, for example, numbers, characters, or symbols. Also, the controller  70  may output information about the type of the medium contained in the usage chamber, for example, the name of the medium or the characteristics of the medium (e.g., flavors or useful life) to the information generator  96 . 
     The controller  70  may operate the driving device  60  when the pre-set conditions are met. The pre-set conditions for changing the relative positions of the first cartridge  10  and the second cartridge  20  may include a cumulative time of heating operations of the heater and/or the heating temperature of the heater. 
     When the pre-set conditions are met, the controller  70  may generate a notification indicating that the relative positions of the first cartridge  10  and the second cartridge  20  need to be changed, through the information generator  96 . If the user checks the notification and manipulates the input device  95 , the controller  70  may operate the driving device  60  to change the relative positions of the first cartridge  10  and the second cartridge  20  based on the input signal from the input device  95 . 
     If the pre-set conditions include the cumulative time of heating operations of the heater, the controller  70  may calculate the cumulative time of heating operations of the heater by summing up time when the current is supplied to the heater or by calculating the amount of current or the amount of power supplied to the heater by the atomization controller  71 . For example, when the aerosol passes through the second material  22  included in one of the chambers  21  of the second cartridge  20  and the service life of the second material for providing flavors to the aerosol is n minutes, the controller  70  may determine, when the cumulative time of heating operations of the heater reaches n minutes, that the use of a chamber through which the aerosol is currently passing needs to be ended. Also, the controller  70  may select another chamber from among the chambers  21  as a new usage chamber by changing the relative position of the second cartridge  20  to the first cartridge  10 . 
     The heating operation of the heater may include a main heating operation of generating heat at a sufficient temperature to vaporize the first material of the first cartridge  10  and a pre-heating operation of generating heat in a certain temperature range that is lower than the temperature corresponding to the main heating operation. The heating operation of the heater included in the pre-set conditions for operating the driving device  60  by using the controller  70  may be a main heating operation. 
     The case where the pre-set conditions include the combination of the cumulative time of heating operations of the heater and the heating temperature of the heater may be more useful when the heating operation of the heater includes the main heating operation and the pre-heating operation. For example, when the service life of the second material  22  for providing flavors to the aerosol is pre-set to n minutes, the controller  70  may count the cumulative time of heating operations of the heater only when the heating temperature of the heater reaches the temperature corresponding to the main heating operation. 
     The pre-set conditions for changing the relative positions of the first cartridge  10  and the second cartridge  20  may include the number of puffs determined based on the detection signal from the puff sensor  79   p  and/or the cumulative time of puffs. When the intensity of the detection signal from the puff sensor  79   p  exceeds a preset threshold value, the controller  70  may determine that a valid inhalation has been performed by the user and may count the number of puffs. 
     When the pre-set conditions include the number of puffs, the controller  70  may count the number of puffs performed on the usage chamber based on the signal generated by the puff sensor  79   p . In this case, the controller  70  may simply count only the number of puffs that have occurred based on the signal of the puff sensor  79   p , ignoring the cumulative time of puffs. 
     For example, if the service life of the second material  22  for providing flavors to the aerosol is pre-set to m puffs, the controller  70  may determine, when the number of puffs reaches m times, that the use of the chamber through which the aerosol currently passes needs to be ended. Also, the controller  70  may select another chamber from among the chambers  21  as a new usage chamber by changing the relative positions of the second cartridge  20  with respect to the first cartridge  10 . 
     The controller  70  may determine a position changing time of the second cartridge  20  for selecting a new chamber based on the use environment of the aerosol generating device or the user&#39;s inhalation habit. To this end, the pre-set conditions may include the cumulative time of puffs and/or the number of puffs. 
     The operation of the aerosol generating device in a case where the pre-set conditions include the combination of the number of puffs and the cumulative time of puffs will be described in detail. For example, if the service life of the second material  22  is p minutes in terms of the cumulative time of puffs and m puffs in terms of the number of puffs, the controller  70  may determine that the use of the chamber through which the aerosol currently passes needs to be ended if both conditions are satisfied. Thus, even if the number of puffs reaches m times based on the signal of the puff sensor  79   p , if the cumulative time of puff operations has not reached p minutes, the controller  70  may maintain the position of the chamber through which the aerosol currently passes until the cumulative time of puffs reaches p minutes. In this case, the number of puffs may exceed m times before the usage chamber is changed. 
     Alternatively, the controller  70  may determine that the use of the chamber through which the aerosol currently passes needs to be ended when either condition (i.e., m puffs or p minutes) is satisfied. 
     According to an embodiment, the pre-set condition for changing the relative positions of the first cartridge  10  and the second cartridge  20  may include a usage time determined based on an input signal generated when the input device  95  receives the user&#39;s input. Using the usage time as the pre-set condition may be useful in a case where the user manually initiates the operation of the heater. For example, for the purpose of satisfying the user&#39;s tastes or improving the user&#39;s convenience, the aerosol generating device may provide a function in which the heater of the atomizer starts a main heating operation immediately without a separate pre-heating operation, in response to the user input on the input device  95 . In this case, the usage time of the atomizer may be determined based on the input signal of the input device  95 . Therefore, when the usage time (i.e., operating time) of the atomizer reaches a pre-set reference usage time, the controller  70  may determine to end the use of the usage chamber and may change the relative positions of the second cartridge  20  with respect to the first cartridge  10  to select another chamber from among the chambers  21  as a new usage chamber. 
     In the above description, characters such as m, n, and p may denote integers or real numbers. 
     The pre-set condition for changing the relative positions of the first cartridge  10  and the second cartridge  20  may include a selection condition indicating that a user input for selecting at least one of the chambers  21  as a usage chamber is received through the input device  95 . 
     The chambers  21  of the second cartridge  20  may include the second material  22  having different types of mediums or different particle sizes, and the controller  70  may control the display lamp  7   d  to emit light or change an emission color, or control the display device  7   f  to display information, thereby providing information about the second material  22  included in the usage chamber (i.e., a chamber aligned with the position of the delivery hole  11  of the atomizer  50   a  and used to pass the aerosol) among the chambers  21  of the second cartridge  20  to the user. 
     When the user manipulates the input device  95  to select a desired chamber from among the chambers  21 , the controller  70  may determine that the selection condition is met, and may change the relative positions of the first cartridge  10  and the second cartridge  20 . 
     Before mounting the aerosol delivering device  5  on the case  7 , a user may adjust the rotation position of the second cartridge  20  so that the position of at least one of the chambers  21  of the second cartridge  20  coincides with a position corresponding to the delivery hole  11  of the atomizer  50   a . After adjusting the relative positions of the first cartridge  10  and the second cartridge  20 , the user may mount the aerosol delivering device  5  on the case  7 . 
     Alternatively, when the user mounts the aerosol delivering device  5  on the case  7 , the driving device  60  embedded in the case  7  may automatically rotate the second cartridge  20  to an initial position for generating an aerosol. When the second cartridge  20  is at the “initial position,” a predetermined chamber among the chambers  21  may be aligned with the delivery hole  11 . 
     In a state in which the position of at least one of the chambers  21  of the second cartridge  20  corresponds to the position of the delivery hole  11  of the first cartridge  10 , the user may inhale the aerosol through the mouthpiece  26 . 
     The aerosol delivering device  5  of the aerosol generating device may be handled as one device in which the first cartridge  10  for accommodating the first material  12  and the second cartridge  20  for accommodating the second material  22  are integrated with each other, and thus is convenient to carry and use. 
     In addition, even when the first cartridge  10  of the aerosol generating device is designed to accommodate a large amount of the first material  12  compared to the second material  22 , the second cartridge  20  may be automatically rotated by the driving device  60  to change the usage chamber, so that the second material  22  may be replaced without replacing the second cartridge. 
     In addition, the chambers  21  of the second cartridge  20  may include different types of second materials  22 . For example, the chambers  21  may include the second material  22  having different particle sizes or different flavors. In this case, the controller  70  may identify the ‘usage chamber’ which is a chamber currently passing the aerosol (i.e., a chamber aligned with the delivery hole  11 ), among the chambers  21 . Because the usage chamber identified by the controller  70  and information about the second material  22  included in the usage chamber may be provided to the user, the user may select one of the chambers  21  to select a desired second material  22 , thereby freely enjoying the aerosol having various flavors according to the user&#39;s preference. 
       FIG.  10    is a latitudinal cross-sectional view illustrating an operating state of an aerosol delivering device according to another embodiment. 
     In the aerosol delivering device according to the embodiment shown in  FIG.  10   , a first cartridge  10  may accommodate a first material  12 , and a second cartridge  20  may be located outside the first cartridge  10  and may be rotatably coupled to the first cartridge  10 . The second cartridge  20  may include a plurality of chambers  21  sequentially arranged in a rotation direction, and a second material  22  may be accommodated in each of the plurality of chambers  21 . 
     The second cartridge  20  may be rotated with respect to the first cartridge  10  by a driving device or user&#39;s manipulation action so that the relative rotation position of the second cartridge  20  with respect to the first cartridge  10  may be changed. 
     As shown in  FIG.  10   , the rotation position of the second cartridge  20  with respect to the first cartridge  10  may be aligned so that the position of one chamber from among the chambers  21  of the second cartridge  20  may correspond to the position of the delivery hole  11  (i.e., a single hole). In the aligned state shown in  FIG.  10   , the aerosol delivered from the delivery hole  11  passes through one of the chambers  21  of the second cartridge  20 , so that the function of changing the characteristics of the aerosol may be performed. 
       FIG.  11    is a latitudinal cross-sectional view illustrating another operating state of the aerosol delivering device according to the embodiment shown in  FIG.  10   . 
     The second cartridge  20  may rotate by the driving device so that the relative positions of the second cartridge  20  with respect to the first cartridge  10  is changed, as shown in  FIG.  11   . As a result, the rotation position of the second cartridge  20  with respect to the first cartridge  10  may be aligned so that the position of two adjacent chambers  21  may correspond to the position of one delivery hole  11 . 
     In  FIG.  11   , each of two adjacent chambers among the chambers  21  of the second cartridge  20  may be positioned to overlap a region corresponding to the half of one delivery hole  11 . However, embodiments are not limited by the alignment position of the second cartridge  20  shown in  FIG.  11   . That is, the rotation position of the second cartridge  20  with respect to the first cartridge  10  may be aligned so that the areas in which two adjacent chambers of the chambers  21  overlap the delivery hole  11  are different from each other. 
     For example, when the remaining service life of the second material  22  contained in one of the two adjacent chambers  21  reaches 20%, the second cartridge  20  may be positioned such that the chamber overlaps an area corresponding to about 80% of the delivery hole  11 , and the other chamber overlaps an area corresponding to about 20% of the delivery hole  11 . 
     As another example, when the remaining service life of the second material  22  contained in one of the two adjacent chambers  21  reaches 60%, the second cartridge  20  may be positioned such that the chamber overlaps an area corresponding to about 40% of the delivery hole  11 , and the other chamber overlaps an area corresponding to about 60% of the delivery hole  11 . 
     As another example, when the service life of the second material  22  contained in one of the two adjacent chambers  21  reaches 80%, the second cartridge  20  may be positioned such that the chamber overlaps an area corresponding to about 20% of the delivery hole  11 , and the other chamber overlaps an area corresponding to about 80% of the delivery hole  11 . 
     A pre-set condition used to change the relative positions of the first cartridge  10  and the second cartridge  20  by using the controller may include the service life of the second material  22 , which is associated with the function of passing the aerosol through the second material  22 , as described above. 
     Also, in order to change the overlapping areas between the adjacent chambers  21  and the delivery hole  11  based on the service life of the second material  22  of the chambers  21 , the second cartridge  20  may rotate intermittently or continuously. 
     In the embodiment illustrated in  FIG.  11    where two adjacent chambers overlap the delivery hole  11 , the operation of generating an aerosol in the first cartridge and delivering the generated aerosol to the second cartridge  20  may be continuously maintained while the second cartridge  20  rotates with respect to the first cartridge  10 . 
     Also, the relative positions of the first cartridge  10  and the second cartridge  20  may be changed so that the usage chamber may be sequentially selected from among the plurality of chambers  21 . When the second cartridge  20  rotates to change the usage chamber, the position of the previous usage chamber may not be immediately separated from the delivery hole  11 . Instead, during the rotation of the second cartridge  20 , the previous usage chamber and the new usage chamber may perform an operation of passing the aerosol at the same time. 
     According to this operating method, while the relative positions of the first cartridge  10  and the second cartridge  20  are being changed, characteristics such as temperature, humidity and flavor of the aerosol delivered to the user do not change abruptly, thereby securing a steady and stable supply of an aerosol. 
     Also, when each of the plurality of chambers  21  of the second cartridge  20  includes the second material  22  having different characteristics, the characteristics of the aerosol such as ingredients and flavors may be changed as the aerosol may pass through the adjacent chambers. Accordingly, various types of aerosols may be provided to the user. 
       FIG.  12    is a latitudinal cross-sectional view of an aerosol delivering device according to another embodiment. 
     In the aerosol delivering device according to the embodiment shown in  FIG.  12   , a first cartridge  10  may accommodate a first material  12 , and a second cartridge  20  may be located outside the first cartridge  10  and may be rotatably coupled to the first cartridge  10 . 
     The second cartridge  20  may include a single chamber  21  that extends in the rotation direction of the second cartridge  20  to surround at least a portion of the first cartridge  10 . A second material  22  may be accommodated in a single chamber  21 . In  FIG.  12   , a single chamber  21  surrounds the entire region in a circumferential region of the first cartridge  10 , but embodiments are not limited by the structure of the chamber  21 . For example, the chamber  21  may be arranged to surround only a partial region in the circumferential direction of the first cartridge  10 . 
     The second cartridge  20  may be rotated with respect to the first cartridge  10  by using a driving device or user&#39;s manipulation action, so that the relative rotation position of the second cartridge  20  with respect to the first cartridge  10  may be changed. 
     When the second cartridge  20  is driven by the driving device, the second cartridge  20  may be continuously rotated over time. In order for the second cartridge  20  to be continuously rotated over time, the rotation speed of the second cartridge  20  may be determined based on the service life of the second material  22 , which is associated with a function of passing the aerosol through the second material  22 . 
     Embodiments are not limited by the rotation speed or rotation method of the second cartridge  20 , and the second cartridge  20  may be rotated intermittently in consideration of the length of the arc of the second cartridge  20  that allows the aerosol to pass through delivery hole  11  and the area of the second material  22  corresponding to the size of the delivery hole  11 . The expression “rotated intermittently” means that a certain period (i.e., time interval) is pre-set and the second cartridge  20  is rotated whenever the certain period elapses. 
     Although the chamber  21  is not visually partitioned for intermittent rotational motion of the second cartridge  20 , the controller may divide the chamber  21  into a plurality of regions in advance along the circumferential direction of the second cartridge  20  in consideration of the area of the second material  22  corresponding to the size of the delivery hole  11 . In addition, when the service life of the second material  22  in the current region that passes the aerosol from among the plurality of regions of the chamber  21  expires, the controller may rotate the second cartridge  20  so that the next region among a plurality of regions of the chamber  21  may be aligned with the delivery hole  11 . 
       FIG.  13    is a latitudinal cross-sectional view of an aerosol delivering device according to another embodiment. 
     In the aerosol delivering device according to the embodiment shown in  FIG.  13   , a first cartridge  10  may accommodate a first material  12 , and a second cartridge  20  may be located outside the first cartridge  10  and may be rotatably coupled to the first cartridge  10 . 
     The second cartridge  20  may be rotated with respect to the first cartridge  10  by using a driving device or user&#39;s manipulation action, so that the relative rotation position of the second cartridge  20  with respect to the first cartridge  10  may be changed. 
     At least a portion of the first cartridge  10  may include a transparent material so that the remaining amount of the first material  12  may be visually checked from the outside. The entire region or a partial region of the first cartridge  10  accommodating the first material  12  may include a transparent material such as glass or plastic. 
     The second cartridge  20  may include a plurality of chambers  21  which are sequentially arranged in the rotation direction of the second cartridge  20  to surround at least a portion of the first cartridge  10  and accommodate the second material  22 . Also, a transparent window  20   f  may be arranged between the plurality of chambers  21  such that a transparent material of the first cartridge  10  is exposed to the outside through the transparent window  20   f.    
     According to the aerosol delivering device described above, the remaining amount of the first material  12  accommodated in the first cartridge  10  may be checked from the outside of the aerosol delivering device through the transparent window  20   f  of the aerosol delivering device. Thus, the user may check the remaining amount of the first material  12  accommodated in the first cartridge  10 , and may rotate the second cartridge  20  in consideration of the remaining amount of the first material  12 . Also, the user may replace the aerosol delivering device if necessary. 
     Embodiments are not limited by a structure in which the transparent window  20   f  is installed in the second cartridge  20  having the plurality of chambers  21 , as shown in  FIG.  13   . For example, a transparent window may also be installed in the second cartridge  20  having a single chamber  21  shown in  FIG.  12   . 
       FIG.  14    is a longitudinal cross-sectional view of an aerosol generating device according to another embodiment. The aerosol generating device according to the embodiment shown in  FIG.  14    is generally similar to the aerosol generating device according to the embodiment shown in  FIGS.  6  through  8   . 
     The aerosol generating device according to the embodiment shown in  FIG.  14    may include a handle  110  that may be manually operated by the user. The handle  110  may be used instead of a driving device such as a motor so as to change the relative positions of the first cartridge  10  and the second cartridge  20 . 
     The handle  110  may be connected to a handle shaft  111  rotatably arranged in the case  7 , and a bottom end of the handle shaft  111  may be rotatably coupled to a base  7   b  of the case  7  by a bearing  111   b.    
     A gear may be installed at an outer edge along a circumferential direction of the handle  110 , and the gear of the handle  110  may be engaged with a gear surface  20   g  that extends in the rotation direction of the second cartridge  20 . 
     A switch  120  that generates a position signal indicating the position of the chambers  21  according to changes in the relative positions of the second cartridge  20  with respect to the first cartridge  10  may be installed at a lower end of the handle shaft  111 . The switch  120  may be an example of the position sensor. 
     The switch  120  may include a sender  121  installed at a lower end of the handle shaft  111 , and a receiver  122  that is arranged inside the case  7  and detects a signal transmitted from the sender  121 . The installation position of the sender  121  may be variously changed, and the sender  121  may be arranged on an outsider surface of the second cartridge  20 , for example. 
     The switch  120  may be implemented by an optical sensor (e.g., a photocoupler), a magnetic sensor that detects magnetism by using a hall effect, an electric resistance sensor that detects changes in electric resistance, and/or a switch that generates a signal according to a physical contact. 
     Because at least a portion of the handle  110  is arranged to be exposed to the outside of the case  7 , the user may manually rotates the handle  110 . In this case, the user&#39;s force may be transmitted to the gear surface  20   g  through the force transmission unit  113  so that the second cartridge  20  may rotate. 
     In a state in which the position of at least one of the chambers  21  of the second cartridge  20  corresponds to the position of the delivery hole  11  of the first cartridge  10 , the user may inhale the aerosol through the mouthpiece  26 . 
     While the second cartridge  20  is rotated, the controller  70  may identify the usage chamber that is aligned with the delivery hole  11  (i.e., a chamber that is in use to pass the aerosol) among the chambers  21 , based on the signal from the position sensor  120 . 
     The controller  70  may output and provide information about the usage chamber that. is currently aligned with the position of the delivery hole  11  to the user through an information generator. 
     When manipulating the handle  110  to rotate the second cartridge  20 , the user may simultaneously check the information about the usage chamber output by the information generator and then may select a desired chamber to be used among the chambers  21 . 
     Embodiments are not limited by the connection structure shown in  FIG.  14    of the handle  110  for moving the second cartridge  20  and the second cartridge  20 , and the structure of the handle  110  that may be manually operated by the user and the connection structure of the handle  110  and the second cartridge  20  may be variously changed. For example, the handle  110  may not be directly connected to the gear surface  20   g  of the second cartridge  20 . Instead, an additional transmission element such as a rubber ring or a ring having a transmission gear may be installed to transmit force between the handle  110  and the second cartridge  20 . In another embodiment, a handle  110  may be installed on an outer surface of the second cartridge  20 . 
     If the handle  110  is directly connected to the second cartridge  20  or the handle  110  is installed on the second cartridge  20 , the switch for generating the position signal indicating the position of the chambers  21  according to changes in the rotation position of the second cartridge  20  may be installed at the handle  110 . 
       FIG.  15    is an exploded view schematically illustrating a coupling relationship between components of an aerosol delivering device according to another embodiment, and  FIG.  16    is a longitudinal cross-sectional view of an aerosol generating device including the aerosol delivering device according to the embodiment shown in  FIG.  15   . 
     The aerosol generating device according to the embodiment shown in  FIGS.  15  and  16    may include an aerosol delivering device  5  for supplying an aerosol to a user, and an atomizer  50   a  connected to the aerosol delivering device  5 . The aerosol generating device may further include a main body  70   a  detachably connectable to the atomizer  50   a.    
     The aerosol delivering device  5  may include a first cartridge  10  for accommodating the first material  12  for generating an aerosol, and a second cartridge  20  located inside the first cartridge  10  to be rotated with respect to the first cartridge  10 . 
     The first cartridge  10  of the aerosol delivering device  5  may be connected to the atomizer  50   a  and may supply the first material  12  to the atomizer  50   a . The aerosol generated from the atomizer  50   a  may be delivered to the second cartridge  20  via the delivery hole  11 . 
     The first cartridge  10  may include a support hole  10   c  inside to accommodate the second cartridge  20 . The support hole  10   c  may extend in the longitudinal direction of the first cartridge  10 . The second cartridge  20  may be rotated with respect to the first cartridge  10  based on a longitudinal central axis of the support hole  10   c  in a state where the second cartridge  20  is inserted into the support hole  10   c  of the first cartridge  10 . 
     The first cartridge  10  may accommodate the second cartridge  20  inside, thereby rotatably supporting the second cartridge  20  and protecting the second cartridge  20 . Because the inside of the first cartridge  10  is empty, the first cartridge  10  may accommodate the first material  12 . 
     The second cartridge  20  may accommodate the second material  22  through which the aerosol delivered from the atomizer  50   a  may pass and may be discharged to the outside. The second cartridge  20  may include a plurality of chambers  21  which are separated from each other by a barrier wall  20   w , and the second material  22  may be accommodated in each of the chambers  21 . The plurality of chambers  21  of the second cartridge  20  may be sequentially arranged in the rotation direction of the second cartridge  20 . 
     An intermediate sheet  28   r  including a plurality of discharge holes  28   a  formed to respectively correspond to the plurality of chambers  21  may be coupled to the upper opening of the second cartridge  20 . An upper support body  20   c  may be coupled to the upper end of the second cartridge  20 . A mouthpiece  26  including an outlet  26   e  for discharging an aerosol to the outside may be formed on a top surface of the upper support body  20   c . A spacer projection  28   p  protruding toward the upper opening of the second cartridge  20  may be arranged on a lower portion of the intermediate sheet  28   r.    
     Referring to  FIG.  16   , when the intermediate sheet  28   r  is coupled to the upper opening of the second cartridge  20 , the intermediate sheet  28   r  and the top end of the second material  22  accommodated in the second cartridge  20  are apart from each other. Accordingly, a chamber  28   c  in which an aerosol may stay may be formed between the intermediate sheet  28   r  and the top end of the second material  22 . Because the aerosol passing through the second material  22  of the second cartridge  20  and moving to the top end of the second cartridge  20  collects in the chamber  28   c , a sufficient pressure by the aerosol may be formed in the chamber  28   c . The chamber  28   c  may be formed in an intermediate region on a path through which the aerosol that has passed through the second cartridge  20  is delivered to the mouthpiece  26 , thereby performing the function of damping and/or regulating the pressure of the aerosol discharged to the mouthpiece  26 . 
     A coupling projection  20   r  may protrude from an outer circumferential surface of a top end of the second cartridge  20 , and a coupling groove  20   s  into which the coupling projection  20   r  may be inserted, may be formed in a bottom surface of the upper support body  20   c . The mark  91  may be arranged on the outer surface of the upper support body  20   c . Because the coupling protrusion  20   r  needs to be inserted into the coupling groove  20   s  so that the second cartridge  20  and the upper support body  20   c  may be coupled to each other, the second cartridge  20  and the upper support body  20   c  may be coupled to each other at pre-set coupling positions. Also, the upper support body  20   c  and the second cartridge  20  may be rotated together in a state where the coupling protrusion  20   r  is inserted into the coupling groove  20   s.    
     A mark  92  that may be used as a reference position with respect to the mark  91  of the second cartridge  20  may be located outside the first cartridge  10 . The user may rotate the second cartridge  20  with respect to the first cartridge  10  so that the mark  91  of the second cartridge  20  may coincide with the mark  92  of the first cartridge  10 . In this way, the position of at least one of the chambers  21  of the second cartridge  20  may be aligned with the position of the delivery hole  11  through which the aerosol is discharged. 
     In addition, a position fixing surface  10   s  may be formed in a partial region of the outside of the first cartridge  10 . The position fixing surface  10   s  may perform an alignment function of aligning the relative position of the aerosol delivering device  5  with respect to the case  7  when the aerosol delivering device  5  is inserted into the case  7 , and the function of preventing the rotational motion of the first cartridge  10  while the second cartridge  20  is rotated. 
     A gear surface  20   g  may be arranged outside the upper support body  20   c  of the second cartridge  20  and may extend in the rotation direction of the second cartridge  20 . A gear of a handle  110  that may be manually operated by the user may engage with the gear surface  20   g . Referring to  FIG.  16   , a bottom end of a handle shaft  111  connected. to the handle  110  may be rotatable coupled to the case  7  by a bearing  111   b . A force applied the handle  110  may be transmitted to the upper support body  20   c  through the gear surface  20   g  so that the upper support, body  20   c  and the second cartridge  20  may make a rotational motion. 
     The atomizer  50   a  may include a wick  54  that absorbs and holds the first material  12  from a lower portion of the first cartridge  10 , and a heater  52  may be wound on the wick  54  or may be disposed adjacent to the wick  54  to heat the first material  12  to generate an aerosol. 
     The heater  52  may be an electric resistive heating element that is connected to the electrical terminal  50   d  inside the case  7  and may generate heat by electricity supplied from the controller  70 . 
     The atomizer  50   a  may perform the function of generating an aerosol from the first material  12  and delivering the aerosol to the second cartridge  20 . A sealing plate  59  may be arranged between the bottom end of the first cartridge  10  and the atomizer  50   a , The sealing plate  59  may perform the function of sealing the upper opening of the atomizer  50   a  to form a space for generating an aerosol together with the atomizer  50   a  and sealing the bottom end of the first cartridge  10 . The sealing plate  59  may include a supply hole  59   a  for supplying the first material  12  of the first cartridge  10  to the wick  54 , and a delivery hole  11  for delivering the aerosol generated in the atomizer  50   a  to the second cartridge  20 . 
     The delivery hole  11  may be located to correspond to a support hole  10   c  inside the first cartridge  10 . After the aerosol generated in the atomizer  50   a  passes through the delivery hole  11 , the aerosol may move in a longitudinal direction of the first cartridge  10  in the first cartridge  10  along the support hole  10   c.    
     Referring to  FIG.  16   , a puff sensor  79   p  may be arranged on a flow path of the aerosol inside the case  7 . The puff sensor  79   p  may detect the user&#39;s aerosol inhalation based on the flow of the aerosol. For example, the puff sensor  79   p  may be connected to the inner space of the atomizer  50   a , detect the change in pressure or flow rate of air (i.e., mainstream including an aerosol) flowing through the inside of the atomizer  50   a , and generate a signal based on the detected change. The puff sensor  79   p  may be arranged in a pressure detection hole  79   s  connected to the delivery passage  50   p  of the atomizer  50   a.    
     In the aerosol generating device described above, the aerosol delivered from the atomizer  50   a  and entering the chambers  21  of the second cartridge  20  may pass through the second material  22  accommodated in the chambers  21 . The second material  22  may provide flavors to the aerosol. As a result, the aerosol that has passed through the second material  22  may have sufficient flavors and may be discharged to the outside of the aerosol generating device through the mouthpiece  26 . 
       FIG.  17    is a flowchart schematically illustrating a method of generating an aerosol by using the aerosol generating device according to the embodiments shown in  FIGS.  6  through  16   . 
     The method of generating an aerosol according to the embodiment shown in  FIG.  17    may include detecting a user&#39;s inhalation operation (S 100 ), determining that the inhalation operation has been detected to start an aerosol-supplying operation (S 110 ), detecting a rotation position of the second cartridge with respect to the first cartridge (S 120 ), determining whether a signal of the detected rotation position of the second cartridge is good (S 130 ), when the signal of the rotation position is not good, adjusting the rotation position of the second cartridge (S 131 ), when the signal of the rotation position of the second cartridge is good, determining the type of a medium currently in use to supply the aerosol (i.e., determining the type of a second material) based on the signal of the rotation position of the second cartridge (S 140 ), determining at least one of a target temperature for an operation of an atomizer and a heating profile for controlling a heating operation of the atomizer based on the determined type of the medium (S 150 ), operating the atomizer based on the target temperature or the heating profile (S 160 ), detecting a current temperature to compare the current temperature with the target temperature (S 170 ), comparing whether a pre-set condition is achieved (S 180 ), when the pre-set condition is achieved, checking whether a current usage chamber is a last chamber among chambers of the second cartridge (S 200 ), and when the current usage chamber is not the last chamber, changing relative positions of the first cartridge and the second cartridge (S 190 ). 
     A pre-set condition for changing the relative positions of the first cartridge and the second cartridge may include a cumulative time of heating operations of a heater and/or the heating temperature of the heater. 
     Alternatively, the pre-set condition for changing the relative positions of the first cartridge and the second cartridge may include the number of puffs and/or the cumulative time of the puffs. 
     Alternatively, the pre-set condition for changing the relative positions of the first cartridge and the second cartridge may include a usage time determined based on an input signal generated when an input device receives the user&#39;s input. 
     By performing changing the relative positions of the first cartridge and the second cartridge (S 190 ), a usage chamber through which the aerosol currently passes, among the chambers of the second cartridge may be changed. In other words, a subsequent chamber may be moved to a position corresponding to a delivery hole of the first cartridge. The changing of the relative positions of the first cartridge and the second cartridge (S 190 ) may be automatically performed by a driving device operated by a controller or by the user&#39;s manual manipulation. 
     The changing of the relative positions of the first cartridge and the second cartridge (S 190 ) may include, when the pre-set condition is met, providing a notification of the need to change positions of the chambers to the user, receiving an input signal generated when the user manipulates the input device, providing information about a chamber aligned with a delivery hole of the first cartridge among the chambers of the second cartridge to the user, and changing the position of at least one of the first cartridge and the second cartridge by operating the driving device based on input manipulation received from the input device. 
     When the relative positions of the first cartridge and the second cartridge are changed, the usage chamber may be immediately moved out of the position corresponding to the delivery hole, the subsequent chamber may be aligned with the delivery hole such that the aerosol may pass through the subsequent chamber. Alternatively, the usage chamber and the subsequent chamber may perform an operation of passing the aerosol temporarily together for a while, and as time passes, only the subsequent chamber may perform the operation of passing the aerosol. 
     After the changing of the relative positions of the first cartridge and the second cartridge (S 190 ), the method returns to detecting of the user&#39;s inhalation operation ( 100 ) such that the above-described operations may be repeated. 
     According to the embodiments, even when the first cartridge of the aerosol generating device is designed to accommodate a large amount of the first material, the second cartridge may be rotated to select another chamber for supplying an aerosol. Therefore, the second material may be replaced with a new material without replacing the second cartridge including the second material. 
     In addition, if the chambers of the second cartridge include different types of second materials, the user may select a chamber corresponding to a desired second material. In this respect, the user may freely enjoy an aerosol having various flavors according to the user&#39;s preference. 
     Those of ordinary skill in the art related to the present embodiments may understand that various changes in form and details can be made therein without departing from the scope of the characteristics described above. The disclosed methods should be considered in a descriptive sense only and not for purposes of limitation. The scope of the present disclosure is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present disclosure. 
     INDUSTRIAL APPLICABILITY 
     One or more embodiments relate to an aerosol delivering device and an aerosol generating device with the same.