Patent Publication Number: US-2023158435-A1

Title: Air cleaner

Description:
TECHNICAL FIELD 
     The present disclosure relates to an air cleaner. 
     BACKGROUND ART 
     An air cleaner is understood as an appliance that inhales and filters contaminated air and then discharges the filtered air, and is configured to purify an indoor space such as a home or an office. Generally, the air cleaner includes a blower configured to inhale external air and discharge the inhaled air, and a filter disposed inside the blower to filter dust, bacteria, and the like in the air. In this connection, the air cleaner may further include a flow adjusting device configured to adjust a discharge direction of the air discharged from the blower. However, because an operating radius of the flow adjusting device is limited, air is not able to be blown in a desired direction. 
     Prior art (Korean Patent Application Publication No. 10-2017-0101100, hereinafter, referred to as prior art 1) discloses an air cleaner further including the flow adjusting device configured to adjust the discharge direction of the air discharged from the blower. In the air cleaner of the prior art 1, the air inhaled into the blower is filtered by the filter disposed inside the blower and then discharged in a vertical direction perpendicular to a top surface of the blower. Thereafter, the air discharged from the blower is blown in a direction other than the vertical direction through the flow adjusting device. 
     However, even with the air cleaner of the prior art 1, there is an inconvenience that the air discharged from the blower is only blown in the vertical direction or in a direction forming a predetermined angle with respect to the top surface of the blower, but is not able to be blown in a horizontal direction parallel to the top surface of the blower. 
     Another prior art (Korean Patent Application Publication No. 10-2019-0120126, hereinafter, referred to as prior art 2) discloses an air cleaner that includes the flow adjusting device configured to adjust the discharge direction of the air discharged from the blower, and a rotation guide configured to induce rotation of the flow adjusting device. In the air cleaner of prior art 2, a position of the flow adjusting device may be changed based on a degree of withdrawal of the rotation guide, and the air discharged from the blower may be blown in a direction other than the vertical direction through the flow adjusting device based on the degree of withdrawal of the rotation guide. 
     However, even with the air cleaner of prior art 2, because a space defined inside the blower in which the rotation guide may be disposed is limited, a length of the rotation guide for changing a state to reach a state in which a top surface of the flow adjusting device is vertical to the top surface of the blower is not able to be secured. Accordingly, there is a limit in that it is difficult to blow the air discharged from the blower in the desired direction. 
     DISCLOSURE OF INVENTION 
     Technical Problem 
     One of various tasks of the present disclosure is to provide an air cleaner that may discharge filtered air in a horizontal direction parallel to a top surface of a blower. 
     One of various tasks of the present disclosure is to provide an air cleaner including a flow adjusting device that allows orientation change from a state in which a top surface of the flow adjusting device is horizontal with a top surface of a blower to a state in which the top surface of the flow adjusting device is perpendicular to the top surface of the lower. 
     Solution to Problem 
     An air cleaner according to exemplary embodiments of the present disclosure may include a blower that inhales air from the outside, filters the inhaled air, and discharges the filtered air, a flow adjusting device disposed on the blower to inhale the air discharged from the blower, adjust a discharge direction of the inhaled air, and discharge the air, and a guide member disposed below the flow adjusting device to change a state of the flow adjusting device. The guide member may include a plurality of gear boxes. An angle formed between a top surface of the flow adjusting device and a top surface of the blower may increase or decrease based on operations of the plurality of gear boxes, so that the orientation of the flow adjusting device may be changed from a state in which the top surface of the flow adjusting device is horizontal with the top surface of the blower to a state in which the top surface of the flow adjusting device is perpendicular to the top surface of the blower. 
     An air cleaner according to exemplary embodiments of the present disclosure may include a blower that inhales air from the outside, filters the inhaled air, and discharges the filtered air, a flow adjusting device disposed on the blower to inhale the air discharged from the blower, adjust a discharge direction of the inhaled air, and discharge the air, and a guide member disposed below the flow adjusting device to change a state of the flow adjusting device. The guide member may include a plurality of gears arranged inside the guide member and rotatable, some of the plurality of gears may be connected to each other to be rotatable in engagement with each other, and the flow adjusting device may change the discharge direction of the air by rotations of the plurality of gears of the guide member. 
     The flow adjusting device may be oriented to be in a first position, a second position, and a third position based on an operation of the guide member, the first position may be a state where a top surface of the flow adjusting device is horizontal with a top surface of the blower, the second position may be a state where the top surface of the flow adjusting device has a predefined angle with respect to the top surface of the blower, and the third position may be a state where the top surface of the flow adjusting device is perpendicular to the top surface of the blower. 
     The guide member may include a first housing disposed on the top surface of the blower, a second housing coupled to the first housing to ascend and descend, a guide connector disposed to pivot by being coupled to the bottom surface of the flow adjusting device and a portion of the second housing, a housing gear assembly disposed inside the first housing to connect the first housing and the second housing with each other, and including a plurality of housing gears that are rotatable, and a guide gear assembly disposed inside the second housing to connect the second housing and the flow adjusting device with each other, and including a plurality of guide gears that are rotatable. The flow adjusting device may be controlled to ascend or descend by the housing gear assembly, and the flow adjusting device may be controlled to pivot about the guide connector by the guide gear assembly. 
     The housing gear assembly may include a housing actuator disposed inside the first housing, a first housing gear that rotates by the housing actuator, and a second housing gear that rotates in engagement with the first housing gear. 
     The first housing gear and the second housing gear may be controlled to rotate in opposite directions to each other. 
     The second housing gear may be coupled to the second housing, and as the second housing gear rotates, the second housing may be controlled to pivot in the same direction as the second housing gear rotates. 
     The flow adjusting device may be coupled to one end of the second housing, and the second housing gear may be coupled adjacent to the other end of the second housing. 
     The second housing may be controlled to pivot about the second housing gear, and accordingly, the flow adjusting device may be controlled to ascend or descend. 
     The guide gear assembly may include a guide actuator disposed inside the second housing, a first guide gear that rotates by the guide actuator, and a second guide gear that rotates in engagement with the first guide gear. 
     The first guide gear and the second guide gear may be controlled to rotate in opposite directions to each other. 
     The second guide gear may be coupled to the guide connector, and as the second guide gear rotates, the guide connector may be controlled to rotate in the same direction as the second guide gear rotates. 
     The flow adjusting device may be coupled to a side wall of the guide connector, and the guide connector may be controlled to rotate about the second guide gear, so that the flow adjusting device may be controlled to be oriented in the first position to the third position. 
     The guide gear assembly may further include an idler gear disposed between the first guide gear and the second guide gear to rotate in engagement with the first guide gear and the second guide gear. 
     The first guide gear and the second guide gear may be controlled to rotate in the same direction with each other. 
     The housing gear assembly and the guide gear assembly may be controlled to operate simultaneously. 
     The blower may include a guide member seating portion for seating the first housing of the guide member thereon, and the guide member seating portion may have a shape of a ring having a central portion penetrated in the plan view. 
     The guide member may further include a direction adjusting gear assembly disposed inside the first housing to connect the first housing and the blower with each other, and including a direction adjusting gear that is rotatable in a different direction from the plurality of housing gears and the plurality of guide gears, and the direction adjusting gear may be controlled to move along an inner circumferential surface of the guide member seating portion. 
     A guide ring may be disposed on the inner circumferential surface of the guide member seating portion such that the direction adjusting gear is rotatable in engagement with the guide ring, and the direction adjusting gear may be controlled to move along the guide ring. 
     The flow adjusting device may be controlled to move along the inner circumferential surface of the guide member seating portion by the direction adjusting gear assembly. 
     The blower may include a first blower configured to inhale, filter, and blow air at a relatively low vertical level, and a second blower disposed on the first blower and configured to inhale, filter, and blow air at a relatively high vertical level. The first blower may include a first casing for defining appearance of the first blower, a first filter member disposed in a lower portion of an interior of the first casing to filter the air, and a first blow fan disposed in an upper portion of the interior of the first casing to generate air flow. The second blower may include a second casing for defining appearance of the second blower, a second filter member disposed in a lower portion of an interior of the second casing to filter the air, and a second blow fan disposed in an upper portion of the interior of the second casing to generate air flow. In addition, the guide member may be disposed between the second blow fan and the flow adjusting device. 
     Advantageous Effects of Invention 
     The air cleaner according to exemplary embodiments of the present disclosure may include the sequentially stacked blowers, the guide member, and the flow adjusting device, and the guide member may include the plurality of gears arranged inside the guide member and configured to be rotatable. Some of the plurality of gears may be connected to each other to be rotatable in engagement with each other. The flow adjusting device may be configured to change the discharge direction of the air by the rotations of the plurality of gears of the guide member. 
     In this connection, the angle formed between the top surface of the flow adjusting device and the top surface of the blower may increase or decrease based on the operations of the plurality of links, so that the orientation of the flow adjusting device may be changed from the orientation in which the top surface of the flow adjusting device is horizontal with the top surface of the blower to the orientation in which the top surface of the flow adjusting device is perpendicular to the top surface of the blower. 
     Therefore, the top surface of the flow adjusting device may be oriented to be perpendicular to the top surface of the blower. Thus, the air discharged from the blower may be blown farther away in the desired direction through the flow adjusting device. 
     In addition, the guide member according to exemplary embodiments of the present disclosure may have a stable and improved appearance because, compared to a driving scheme of the conventional guide member configured to be movable by being inserted into the blower or withdrawn from the top surface of the blower, not only more concise and natural driving is possible, but also a structure for driving the guide member is not exposed to the outside. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIGS.  1  and  2    are diagrams for illustrating an air cleaner according to exemplary embodiments of the present disclosure. 
         FIGS.  3  and  4    are diagrams for illustrating a flow adjusting device and a guide member according to exemplary embodiments of the present disclosure. 
         FIG.  5    is a diagram for describing a coupling structure of a blower and a guide member according to exemplary embodiments of the present disclosure. 
         FIGS.  6  to  8    are diagrams for illustrating a state change of a flow adjusting device based on an operation of a guide member according to exemplary embodiments of the present disclosure. 
     
    
    
     BEST MODE FOR CARRYING OUT THE INVENTION 
     Hereinafter, specific embodiments of the present disclosure will be described with reference to the drawings. The following detailed description is configured to aid in a comprehensive understanding of methods, devices and/or systems described herein. However, this is only an example, and the present disclosure is not limited thereto. 
     In describing the embodiments of the present disclosure, when it is determined that a detailed description of the publicly known technology related to the present disclosure may unnecessarily obscure the subject matter of the present disclosure, the detailed description will be omitted. In addition, terminologies to be described later are terminologies defined in consideration of functions in the present disclosure, which may vary depending on an intention of a user or an operator, customs, or the like. Therefore, the definitions of the terminologies should be made based on the contents throughout the specification. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used herein, the singular forms “a” and “an” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises”, “comprising”, “includes”, and “including” when used in this specification, specify the presence of the stated features, integers, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, operations, elements, components, and/or portions thereof. 
     In addition, in describing components of the embodiment of the present disclosure, terminologies such as first, second, A, B, (a), (b), and the like may be used. These terminologies are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the terminology. 
     Hereinafter, a direction perpendicular to a ground is defined as a vertical direction. A direction parallel to the ground and perpendicular to the vertical direction is defined as a horizontal direction. A circumferential direction is defined as a virtual circular direction that is formed when an object rotates around the vertical direction at a rotation radius as a length of the horizontal direction. 
       FIGS.  1  and  2    are diagrams for illustrating an air cleaner according to exemplary embodiments of the present disclosure. Specifically,  FIG.  1    is a diagram for illustrating an overall structure of an air cleaner, and  FIG.  2    is a diagram for illustrating a component of the air cleaner. 
     Referring to  FIGS.  1  and  2   , an air cleaner  1  according to exemplary embodiments of the present disclosure may include a blower  10  and  20  configured to inhale air from the outside, and filter the inhaled air and discharge the filtered air, a flow adjusting device  30  disposed on the blower  10  and  20  and configured to inhale the air discharged from the blower  10  and  20 , and adjust a discharge direction of the inhaled air, and a guide member  40  disposed between the blower  10  and  20  and the flow adjusting device  30 , wherein one end thereof is connected to the blower  30  and the other end is connected to air the discharge assembly  30 , wherein the guide member  40  is configured to induce a state change of the flow adjusting device  30 . 
     The blower  10  and  20  includes a first blower  10  configured to inhale, filter, and blow air at a relatively low vertical level, and a second blower  20  disposed on the first blower  10  and configured to inhale, filter, and blow air at a relatively high vertical level. The first blower  10  and the second blower  20  may be stacked in the vertical direction, and may be fastened to each other via a variety of manners, such as fitting fastening, rivet fastening, and screw fastening. 
     The flow adjusting device  30  may be disposed on the second blower  20 . The guide member  40  may be configured to be connected to the second blower  20  and the flow adjusting device  30 . The guide member  40  and the second blower  20  may be fastened to each other via a variety of methods, such as fitting fastening, rivet fastening, and screw fastening. The guide member  40  and the flow adjusting device  30  may be fastened to each other via various methods such as fitting fastening, rivet fastening, and screw fastening. 
     In one example,  FIG.  1    shows that the blower  10  and  20  include the first blower  10  and the second blower  20  sequentially stacked along the vertical direction. However, a concept of the present disclosure is not necessarily limited thereto. A blower may include only one blower. 
     The first blower  10  may include a first casing  100  that defines appearance of the blower, a first filter member  130  disposed in a lower portion of an interior of the first casing  100  to filter air, and a first blow fan  160  disposed in an upper portion of the interior of the first casing  100  to generate air flow. The second blower  20  includes a second casing  200  that defines the appearance, a second filter member  230  disposed in a lower portion of an interior of the second casing  200  to filter air, and a second blow fan  260  disposed in an upper portion of the interior of the second casing  200  to generate air flow. 
     In exemplary embodiments, each of the first casing  100  and the second casing  200  may have a truncated conical shape, or a cylinder shape having a diameter that gradually decreases as it extends upwardly. 
     The first blower  10  may further include a first base  105  disposed in the lower portion of the first blower  10 . The first base  105  may be disposed on a ground and configured to support the first blower  10 . The first base  105  may include a lower portion configured to contact the ground and an upper portion extending in the vertical direction from the lower portion and at least partially covered by the first casing  100 . In one example, although not shown, a first lower inhale hole communicating with the interior of the first blower  10  may be further defined in a space between an inner wall of the first casing  100  and the upper portion of the first base  105 . Accordingly, outside air may be inhaled into the interior of the first blower  10  through the first lower inhale hole. 
     The second blower  20  may further include a second base  205  disposed in the lower portion of the first blower  20 . The second base  105  may be disposed on the first blower  10  and configured to support the second blower  20 . The second base  205  may include a lower portion configured to contact the first blower  10  and an upper portion extending in the vertical direction from the lower portion and at least partially covered by the second casing  200 . In one example, although not shown, a second lower inhale hole communicating with the interior of the second blower  20  may be disposed in a space between an inner wall of the second casing  100  and the upper portion of the second base  205 , Accordingly, outside air may be inhaled into the interior of the second blower  20  through the second lower inhale hole. 
     In a side wall of the first casing  100 , a first inhale hole  110  configured to inhale air from the outside may be defined. The first inhale hole  110  may include a plurality of through-holes passing through at least a portion of the first casing  100 . Further, in a side wall of the second casing  200 , a second inhale hole  210  configured to inhale air from the outside may be defined. The second inhale hole  210  may include a plurality of through-holes passing through at least a portion of the second casing  100 . 
     The first inhale hole  110  may be configured to have a line shape extending from a bottom to a top of the first casing  100 . A plurality of first inhale holes  110  may be defined in the side wall of the first casing  100 . The plurality of first inhale holes  110  may be evenly arranged in the circumferential direction along an outer circumferential surface of the first casing  100  to enable the air inhale in any direction around the first casing  100 . Further, the second inhale hole  210  may be configured to have a line shape extending from a bottom to a top of the second casing  200 . A plurality of second inhale holes  210  may be defined in the side wall of the second casing  200 . The plurality of second inhale holes  210  may be evenly arranged in the circumferential direction along the outer circumferential surface of the second casing  100  to enable air inhale in any direction around the second casing  200 . 
     A first discharge hole  120  configured to discharge air to the outside may be defined in the top surface of the first blower  10 . The first discharge hole  120  may include a plurality of through-holes passing through at least a portion of the top surface of the first blower  10 . Further, a second discharge hole  220  configured to discharge air to the outside may be defined in a top surface of the second blower  20 . The second discharge hole  220  may include a plurality of through-holes passing through at least a portion of a top surface of the second blower  20 . 
     The first discharge hole  120  may be configured to have a line shape extending from a distal portion of the top surface of the first blower  10  to a portion adjacent to a central region thereof. The plurality of first discharge holes  120  may be defined in the top surface of the first blower  10 . The plurality of first discharge holes  120  may be evenly arranged to surround a portion of the top surface of the first blower  10  other than a portion in which the second base  205  is disposed. Further, the second discharge hole  220  may be configured to have a line shape extending from the distal portion of the top surface of the second blower  20  to a portion adjacent to a central region thereof. The plurality of second discharge holes  220  may defined in the top surface of the second blower  20 . The plurality of second discharge holes  220  may be evenly arranged to surround a portion of the top surface of the second blower  20  other than a portion in which the guide member  40  is disposed. 
     In exemplary embodiments, in the plan view, a collection of the plurality of first discharge holes  120  may form a ring shape covering an outer peripheral region of the top surface of the first blower  10 . A collection of the plurality of second discharge holes  220  may form a ring shape covering an outer peripheral region of the top surface of the second blower  20 . In one embodiment, the ring shape defined by the collection of the plurality of first discharge holes  110  may have an outer portion having a higher vertical level than an inner portion thereof. The ring shape defined by the collection of the plurality of second discharge holes  210  may have an outer portion having a higher vertical level than an inner portion thereof. 
     The top surface of the first blower  10  may include an outer peripheral region in which the plurality of first discharge holes  120  are disposed and a central region in which the second base  205  is disposed. The top surface of the second blower  20  may include an outer peripheral region in which the plurality of second discharge holes  220  are disposed and a central region in which the guide member  40  is disposed. In this connection, the central region of the top surface of the first blower  10  may have a lower vertical level than the outer peripheral region thereof. The central region of the top surface of the second blower  20  may have a lower vertical level than the outer peripheral region thereof. 
     Hereinafter, the top surface of the first blower  10  is defined to refer only to the central region in which the second base  205  is disposed, except the outer peripheral region in which the plurality of first discharge holes  120  are disposed. The top surface of the second blower  20  is defined to refer only to the central region in which the guide member  40  is disposed, except the outer peripheral region in which the plurality of second discharge holes  220  are disposed. In exemplary embodiments, each of the top surface of the first blower  10  and the top surface of the second blower  20  may have a flat surface extending in the horizontal direction. 
     The flow adjusting device  30  may include a rear casing which forms an appearance and is configured to define a rear surface of the flow adjusting device  30 , and which includes an inhale grill configured to inhale air discharged from the blower  10  and  20 . The flow adjusting device  30  may include a front casing  300  fastened to the rear casing and configured to define a front surface of the flow adjusting device  30 . The front casing  300  may include a discharge grill  320  configured to discharge air inhaled through the inhale grill. The rear casing includes a rear panel  310  defining the rear surface of the flow adjusting device  30 , and a side panel  305  extending from the rear panel  310  to the front casing  300  to define a side surface of the flow adjusting device  30 . The rear panel  310  of the rear casing  300  may be configured to perform the role of the inhale grill. That is, a combination of the side panel  305  and the rear panel  310  may form the rear casing  300 . 
     The top surface of the flow adjusting device  30  and a side wall of the front casing  300  may be configured to be spaced apart from each other. The discharge grill  320  may be disposed in a space between the top surface of the flow adjusting device  30  and the side wall of the front casing  300  to discharge air to the outside. The discharge grill  320  may have a structure surrounding the top surface of the flow adjusting device  30  in the plan view. Accordingly, the air inhale may be executed in any direction around the top surface of the flow adjusting device  30 . In exemplary embodiments, one side of the discharge grill  320  may be connected to the top surface of the flow adjusting device  30 , while the other side of the discharge grill  320  may be connected to the inner wall of the front casing  300 . 
     The guide member may include a plurality of links having different lengths. An angle formed by the top surface of the flow adjusting device  30  and the top surface of the blower  10  and  20  may increase or decrease based on an operation of the plurality of links, so that a state of the flow adjusting device  30  may be changed from a state in which the top surface of the flow adjusting device  30  is horizontal with the top surface of the blower  10  and  20  to a state in which the top surface of the flow adjusting device  30  is perpendicular to the top surface of the blower  10  and  20 . A detailed description of this will be described later with reference to  FIGS.  6  to  8   . 
     In exemplary embodiments, based on the operation of the guide member  40 , the flow adjusting device  30  may be oriented in a first position in which the top surface of the flow adjusting device  30  is horizontal with the top surface of the second blower  20 , may be oriented in a second position in which the top surface of the flow adjusting device  30  has a predefined angle with respect to the top surface of the second blower  20 , and may be oriented in a third position in which the top surface of the flow adjusting device  30  is perpendicular to the top surface of the second blower  20 . 
     In one example,  FIGS.  1  and  2    respectively show that the flow adjusting device  30  is oriented in the first position. A detailed description of a configuration in which the flow adjusting device  30  is oriented in the second position and the third position will be described later. 
       FIGS.  3  and  4    are diagrams for illustrating a flow adjusting device and a guide member according to exemplary embodiments of the present disclosure. Specifically,  FIG.  3    is a diagram of an internal structure of the guide member viewed from the side, and  FIG.  4    is a diagram of the internal structure of the guide member viewed from the front. 
     Referring to  FIGS.  3  and  4   , the flow adjusting device  30  may include the front casing  300  that defines the front surface of the flow adjusting device  30 , the side panel  305  that defines the side surface of the flow adjusting device  30  and has a shielded structure to prevent air from entering from the outside, the rear panel  310  that defines the rear surface of the flow adjusting device  30  and serves as the inhale grill, and a third blow fan (not shown) disposed between the front casing  300  and the rear panel  310  and flowing the air inhaled through the rear panel  310  toward the discharge grill  320 . In one embodiment, the flow adjusting device  30  may further include a third filter member (not shown) disposed between the third blow fan and the rear panel  310  so as to be seated on an inner surface of the rear panel  310  to filter the air inhaled through the inhale grill. 
     A display  500  configured to display driving information and the like of the air cleaner  1  may be disposed on the top surface of the flow adjusting device  30 . The flow adjusting device  30  and the display  500  may be configured to operate together. In exemplary embodiments, the display  500  may be configured to partially or completely cover the top surface of the flow adjusting device  30 . 
     The front casing  300  and the rear casing may be fastened to each other at tops thereof via first hook fastening, and may be fastened to each other at bottoms thereof via second hook fastening. 
     Specifically, the top portion of the side panel  305  may be configured to include a first hook  333 . The top portion of the front casing  300  may be configured to include a first counterpart hook (not shown). The top portion of the side panel  305  and the top portion of the front casing  300  may be fastened to each other via fastening between the first hook and the first counterpart hook. Further, the bottom portion of the side panel  305  may be configured to include a pair of second counterpart hooks (not shown) symmetrical to each other in the horizontal direction. The bottom portion of the front casing  300  may be configured to include a pair of second hooks (not shown) disposed at positions corresponding to the second counterpart hooks, respectively. The bottom portion of the side panel  305  and the bottom portion of the front casing  300  may be fastened to each other via fastening between the second counterpart hooks and second hooks. In one embodiment, the bottom portion of the side panel  305  may be configured to further include a magnet (not shown). The bottom portion of the front casing  300  may be configured to further include a magnet counterpart (not shown) made of metal. The coupling between the bottom portion of the side panel  305  and the bottom portion of the front casing  300  may be guided via the coupling between the magnet and the magnet counterpart. 
     In exemplary embodiments, the rear casing of the flow adjusting device  30  may be configured to be detachable when the flow adjusting device  30  is oriented in the third position. The filter member  350  may be configured to be detachable from the flow adjusting device  30  when the rear casing is separated from the front casing  300 . 
     The guide member  40  disposed below the flow adjusting device  30  and configured to change the orientation of the flow adjusting device  30  may include a plurality of gears  423 ,  425 ,  433 ,  435 ,  437 , and  443 . Each of the plurality of gears  423 ,  425 ,  433 ,  435 ,  437 , and  443  may be configured to be rotatable. The flow adjusting device  30  may be configured to change the discharge direction of the air by rotation of at least one of the plurality of gears  423 ,  425 ,  433 ,  435 ,  437 , and  443  of the guide member  40 . 
     Specifically, the guide member  40  may include a first housing  400  disposed on the top surface of the blower  10  and  20 , a second housing  410  coupled to the first housing  400  and configured to ascend and descend, a guide connector  415  coupled to a bottom surface of the flow adjusting device  30  and a portion of the second housing  410  and configured to rotate, a housing gear assembly  420  disposed inside the first housing  400  to connect the first housing  400  and the second housing  410  with each other, and including a plurality of housing gears  423  and  425  that are rotatable, and a guide gear assembly  430  disposed inside the second housing  410  to connect the second housing  410  and the flow adjusting device  30  with each other, and including a plurality of guide gears  433 ,  435 , and  437  that are rotatable. The flow adjusting device  30  may be controlled to ascend or descend by the housing gear assembly  420 , and the flow adjusting device  30  may be controlled to pivot about the guide connector  415  by the guide gear assembly  430 . 
     The flow adjusting device  30  and the guide connector  415  may be coupled to each other to operate together, and the bottom surface of the flow adjusting device  30  and a side wall of the guide connector  415  may be fastened to each other and fixed via a variety of methods, such as fitting fastening, rivet fastening, and screw fastening. 
     In exemplary embodiments, a space in which the second housing  410  may be accommodated may be defined inside the first housing  400 . The space inside the first housing  400  may be defined to have a larger volume than the second housing  410  so as not to collide with an inner wall of the first housing  400  when the second housing  410  pivots. In one embodiment, the inner wall of the first housing  400  may have a partially curved portion, and the second housing  410  may be configured to pivot along the curved portion of the inner wall of the first housing  400 . 
     A space in which the housing gear assembly  420  may be accommodated may be defined inside the first housing  400 , and a space in which the guide gear assembly  430  may be accommodated may be defined inside the second housing  410 . The first housing  400  and the second housing  410  may be connected to each other by the housing gear assembly  420 , and a space in which the housing gear assembly  420  may be partially accommodated may be further defined inside the second housing. 
       FIGS.  3  and  4    illustrate that each of the first housing  400 , the second housing  410 , and the guide connector  415  has a specific shape, but the concept of the present disclosure is not necessarily limited thereto. That is, each of the first housing  400 , the second housing  410 , and the guide connector  415  may have various shapes within a range that does not impair an original function thereof. 
     In an exemplary embodiment, when the air cleaner  1  includes the first blower  10  and the second blower  20  sequentially stacked, the guide member  40  may be disposed on the second blower  20 , for example, on the second blow fan  260 . In one embodiment, when the air cleaner  1  includes only one blower, for example, the first blower  10 , the guide member  40  may be disposed on the first blower  10 , for example, on the first blow fan  160 . Otherwise, when the air cleaner  1  includes only the second blower  20 , the guide member  40  may be disposed on the second blower  20 , for example, on the second blow fan  260 . 
     The housing gear assembly  420  may include a housing actuator  421  disposed inside the first housing  400 , a first housing gear  423  configured to rotate by the housing actuator  421 , and a second housing gear  425  configured to rotate in engagement with the first housing gear  423 . In this connection, the first housing gear  423  and the second housing gear  425  may be controlled to engage each other and rotate in opposite directions. 
     The first housing gear  423  may be fastened to a first housing driving shaft (not shown) disposed to protrude from the housing actuator  421 , and the first housing gear  423  and the first housing driving shaft may be controlled to rotate together by the housing actuator. In one embodiment, the first housing gear  423  and the first housing driving shaft may be integrally formed. 
     The second housing gear  425  may be coupled to the second housing  410 , and the second housing  410  may be controlled to pivot in the same direction as the second housing gear  425  rotates as the second housing gear  425  rotates. In exemplary embodiments, the second housing gear  425  may be coupled to an outer wall of the second housing  410 . In this case, the first housing gear  423  and the second housing gear  425  may be arranged outside the second housing  410 . Alternatively, the second housing gear  425  may be coupled to an inner wall of the second housing. In this case, the first housing gear  423  and the second housing gear  425  may be arranged inside the second housing  410 . In one example, a portion of the first housing gear  425  may be disposed inside the second housing  410 , and the remaining portion of the first housing gear  425  may be disposed outside the second housing  410 . 
     The flow adjusting device  30  may be coupled to one end of the second housing  410 , and the second housing gear  425  may be coupled adjacent to the other end of the second housing  410 . The second housing  410  may be controlled to pivot about the second housing gear  425  coupled to the other end of the second housing  410 . Accordingly, the flow adjusting device  30  coupled to one end of the second housing  410  may be controlled to ascend or descend. 
     The guide gear assembly  430  may include a guide actuator  431  disposed inside the second housing  410 , a first guide gear  433  configured to rotate by the guide actuator  431 , and a second guide gear  437  configured to rotate in engagement with the first guide gear  433 . In this case, the first guide gear  433  and the second guide gear  437  may be controlled to rotate in opposite directions. In this connection, the second guide gear  437  may be coupled to the guide connector  415 . The guide connector  415  may be controlled to rotate in the same direction as a direction in which the second guide gear  437  rotates as the second guide gear  437  rotates. 
     The flow adjusting device  30  may be coupled to the side wall of the guide connector  415 , and the guide connector  415  may be controlled to rotate about the second guide gear  437 . Accordingly, the flow adjusting device  30  may be controlled such that the orientation thereof is changed from the orientation in which the top surface of the flow adjusting device  30  is horizontal with the top surface of the blower  10  and  20 , that is, the first position to the orientation in which the top surface of the flow adjusting device  30  is perpendicular to the top surface of the blower  10  and  20 , that is, the third position. 
     In exemplary embodiments, the guide gear assembly  430  may further include an idler gear  435  disposed between the first guide gear  433  and the second guide gear  437  and configured to rotate in engagement with the first guide gear  433  and the second guide gear  437 . The idler gear  435  may be controlled to rotate in a direction opposite to a direction in which each of the first guide gear  433  and the second guide gear  437  rotates. In one embodiment, when the guide gear assembly  430  further includes the idler gear  435 , the first guide gear  433  and the second guide gear  437  may be controlled to rotate in the same direction as each other. 
     In exemplary embodiments, the housing gear assembly  420  and the guide gear assembly  430  may be controlled to operate simultaneously. That is, in order to change the orientation of the flow adjusting device  30  from the first position to the second position, the flow adjusting device  30  may ascend by the housing gear assembly  420 . At the same time, an angle formed between the top surface of the flow adjusting device  30  and the top surface of the blower  10  and  20  may be increased by the guide gear assembly  430 . In addition, in order to change the orientation of the flow adjusting device  30  from the second position to the third position, the flow adjusting device  30  may further ascend by the housing gear assembly  420 . At the same time, the angle formed between the top surface of the flow adjusting device  30  and the top surface of the blower  10  and  20  may be further increased by the guide gear assembly  430 . 
       FIG.  5    is a diagram for describing a coupling structure of a blower and a guide member according to exemplary embodiments of the present disclosure. 
     In addition, in order to change the orientation of the flow adjusting device  30  from the second position to the third position, the flow adjusting device  30  may further ascend by the housing gear assembly  420 . At the same time, the angle formed between the top surface of the flow adjusting device  30  and the top surface of the blower  10  and  20  may be further increased by the guide gear assembly  430 . 
     In this connection, a guide ring  275  may be disposed on an inner circumferential surface of a guide member seating portion  270  such that a direction adjusting gear  443  is rotatable in engagement with the guide ring  275 . Further, the direction adjusting gear  443  may be controlled to move along the guide ring  275 . Therefore, the flow adjusting device  30  may be controlled to move along the inner circumferential surface of the guide member seating portion  270 , that is, the guide ring  275  by a direction adjusting gear assembly  440 . The air discharge direction of the flow adjusting device  30  may be formed evenly in the circumferential direction along the outer circumferential surface of the blower casing  100  and  200 . 
       FIGS.  6  to  8    are diagrams for illustrating a state change of a flow adjusting device based on an operation of a guide member according to exemplary embodiments of the present disclosure. Specifically,  FIG.  6    is a diagram for illustrating an operation of the guide member in a state in which the flow adjusting device is oriented in the first position,  FIG.  7    is a diagram for illustrating an operation of the guide member in a state in which the flow adjusting device is oriented in the second position, and  FIG.  8    is a diagram for illustrating an operation of the guide member in a state in which the flow adjusting device is oriented in the third position. 
     Referring to  FIGS.  6  to  8   , based on the operation of the guide member  40 , the flow adjusting device  30  may be oriented in the first position in which the top surface of the flow adjusting device  30  is horizontal with the top surface of the second blower  20 , may be oriented in the second position in which the top surface of the flow adjusting device  30  has the predefined angle with respect to the top surface of the second blower  20 , and may be oriented in the third position in which the top surface of the flow adjusting device  30  is perpendicular to the top surface of the second blower  20 . 
       FIG.  6    illustrates that a portion of the side panel  305  of the flow adjusting device  30  is inserted into the second casing  200  when the flow adjusting device  30  is oriented in the first position, but the concept of the present disclosure is not necessarily limited thereto. That is, the side panel  305  of the flow adjusting device  30  may not be inserted into the second casing  200 , or entirety of the side panel  305  of the flow adjusting device  30  may be inserted into the second casing  200 . 
     Further,  FIG.  8    illustrates that a portion of the front casing  300  and a portion of the side panel  305  of the flow adjusting device  30  are inserted into the second casing  200  when the flow adjusting device  30  is oriented in the third position, but the concept of the present disclosure is not necessarily limited thereto. That is, the portion of the front casing  300  and the portion of the side panel  305  of the flow adjusting device  30  may not be inserted into the second casing  200 . 
     As described above, the air cleaner  1  according to exemplary embodiments of the present disclosure may include the sequentially stacked blowers  10  and  20 , the guide member  40 , and the flow adjusting device  30 , and the guide member  40  may include the plurality of gears  423 ,  425 ,  433 ,  435 ,  437 , and  443  arranged inside the guide member  40  and configured to be rotatable. Some of the plurality of gears  423 ,  425 ,  433 ,  435 ,  437 , and  443  may be connected to each other to be rotatable in engagement with each other. The flow adjusting device  30  may be configured to change the discharge direction of the air by the rotations of the plurality of gears  423 ,  425 ,  433 ,  435 ,  437 , and  443  of the guide member  40 . 
     In this connection, the angle formed between the top surface of the flow adjusting device  30  and the top surface of the blower  10  and  20  may increase or decrease based on the rotation operations of the plurality of gears  423 ,  425 ,  433 ,  435 ,  437 , and  443 . Thus, the orientation of the flow adjusting device  30  may be changed from the first position in which the top surface of the flow adjusting device  30  is horizontal with the top surface of the blower  10  and  20  to the third position in which the top surface of the flow adjusting device  30  is perpendicular to the top surface of the blower  10  and  20 . 
     Therefore, the top surface of the flow adjusting device  30  may be oriented to be perpendicular to the top surface of the blower  10  and  20 . Thus, the air discharged from the blower  10  and  20  may be blown farther away in the desired direction through the flow adjusting device  30 . 
     In addition, the guide member  40  according to exemplary embodiments of the present disclosure may have a stable and improved appearance because, compared to a driving scheme of the conventional guide member configured to be movable by being inserted into the blower or withdrawn from the top surface of the blower, not only more concise and natural driving is possible, but also a structure for driving the guide member  40  is not exposed to the outside. 
     Although various embodiments of the present disclosure have been described above in detail, those having ordinary knowledge in the technical field to which the present disclosure belongs may realize that various modifications may be made to the above-described embodiment as long as they do not depart from the scope of the present disclosure. Therefore, the scope of rights of the present disclosure should not be limited to the described embodiment and should be determined not only by the claims to be described later but also by equivalents thereto. 
     INDUSTRIAL APPLICABILITY 
     The present disclosure can provide an air cleaner.