Patent Publication Number: US-2023152000-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 an orientation to reach an orientation 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 
     An object 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. 
     Another object of the present disclosure is to provide an air cleaner including a flow adjusting device that allows orientation change from an orientation in which a top surface of the flow adjusting device is horizontal with a top surface of a blower to an orientation 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, and 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 an orientation of the flow adjusting device. The guide member may include a plurality of links having different lengths. An angle formed by a top surface of the flow adjusting device and a top surface of the blower increases or decreases based on operations of the plurality of links, so that an orientation may be changed from an orientation in which the top surface of the flow adjusting device is horizontal with the top surface of the blower to an orientation 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, and 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 an orientation of the flow adjusting device. The guide member may include a plurality of links, and one end of each of the plurality of links may be pivotably connected to an inner portion of the guide member, and the other end of each of the plurality of links may be pivotably connected to a portion disposed on a bottom surface of the flow adjusting device. The flow adjusting device may vary the discharge direction of the air by pivoting of at least one of the plurality of links 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 an orientation where a top surface of the flow adjusting device is horizontal with a top surface of the blower, the second position may be an orientation 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 an orientation 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 first link having one end coupled to the inner portion of the first housing and the other end coupled to an inner portion of the guide connector, and a second link disposed to be spaced apart from the first link, and having one end coupled to the inner portion of the first housing and the other end coupled to the inner portion of the guide connector. The second link may have a length smaller than a length of the first link. 
     The first housing may include a first link connector disposed to be coupled to said one end of the first link, the guide connector may include a second link connector disposed to be coupled to the other end of the first link, said one end of the first link may be connected to the first link connector to pivot about the first link connector, and the other end of the first link may be connected to the second link connector to pivot about the second link connector. 
     The first housing may further include a third link connector disposed to be coupled to said one end of the second link, the guide connector may further include a fourth link connector disposed to be coupled to the other end of the second link, said one end of the second link may be connected to the third link connector to pivot about the third link connector, and the other end of the first link may be connected to the fourth link connector to pivot about the fourth link connector. 
     When the first link pivots, the second link may pivot in the same direction as a pivot direction of the first link. 
     The second link may pivot faster than the first link. 
     The second housing may pivot about the first link connector together with the first link. 
     When the first link pivots, the guide connector may pivot in a direction opposite to the pivot direction of the first link, and the fourth link connector may be connected to the second link connector to pivot about the second link connector together with the guide connector. 
     When the second housing pivots in a first direction, the guide connector may ascend from the first housing, and at the same time, pivot in a second direction opposite to the first direction. 
     When the guide connector pivots in the second direction, the fourth link connector may also pivot in the second direction together with the guide connector. 
     As the second housing pivots in the first direction, and at the same time the guide connector pivots in the second direction, the state of the flow adjusting device may be changed from the first position to the third position. 
     When the second housing pivots in the second direction, the guide connector may descend toward the first housing, and at the same time, pivot in the first direction. 
     When the guide connector pivots in the first direction, the fourth link connector may also pivot in the first direction together with the guide connector. 
     As the second housing pivots in the second direction, and at the same time the guide connector pivots in the first direction, the state of the flow adjusting device may be changed from the third position to the first position. 
     As the state of the flow adjusting device is changed from the first position to the third position, the second link connector and the fourth link connector may be positioned at higher vertical levels than before, respectively. 
     A vertical level increase degree of the fourth link connector may be less than a vertical level increase degree of the second link connector. 
     When the flow adjusting device is oriented in the second position or the third position, the fourth link connector may be disposed at a lower vertical level than the second link connector. 
     The first link and the second link may be respectively arranged on different planes, and the first link and the second link respectively may have portions overlapping with each other when the flow adjusting device is oriented in the first position. 
     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 links. One end of each of the plurality of links may be pivotably connected to the inner portion of the guide member, and the other end of each of the plurality of links may be pivotably connected to the portion disposed on the bottom surface of the flow adjusting device. The flow adjusting device may be configured to vary the discharge direction of the air by the pivoting of the at least one of the plurality of links 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 state of the flow adjusting device may be changed from the state in which the top surface of the flow adjusting device is horizontal with the top surface of the blower to the state 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  to  5    are diagrams for illustrating a flow adjusting device and a guide member according to exemplary embodiments of the present disclosure. 
         FIGS.  6  to  8    are diagrams for illustrating an orientation change of a flow adjusting device based on an operation of a guide member according to exemplary embodiments of the present disclosure. 
     
    
    
     MODE FOR 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 an orientation 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  310 . 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 an orientation of the flow adjusting device  30  may be changed from an orientation in which the top surface of the flow adjusting device  30  is horizontal with the top surface of the blower  10  and  20  to an orientation 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 . 
       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 with reference to  FIGS.  7  and  8   . 
       FIGS.  3  to  5    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 a flow adjusting device and a guide member viewed from the front,  FIG.  4    is a diagram of a flow adjusting device and a guide member viewed from a side, and  FIG.  5    is a diagram of a flow adjusting device and a guide member viewed from the rear. 
     Referring to  FIGS.  3  to  5   , the flow adjusting device  30  may include a front casing  300  defining a front surface of the flow adjusting device  30 , and a side panel  305  defining a side surface of the flow adjusting device  30  to prevent air from entering the casing from outside, a rear panel  310  that defines a rear surface of the flow adjusting device  30  and performs a role of an inhale grill  310 , and a third blow fan  360  disposed between the front casing  300  and the rear panel  310  to blow inhaled air 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) configured to be seated on an inner surface of the rear panel  310  and disposed between the blow fan  360  and the rear panel  310  to filter inhaled air through the inhale grill. 
     A display  500  configured to display operation information 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 work together. In exemplary embodiments, the display  500  may be configured to partially or entirely cover a 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  333  and the first counterpart hook  335 . 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 . 
       FIGS.  6  to  8    are diagrams for illustrating an orientation 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. In this connection,  FIGS.  6  to  8    are cross-sectional views taken along a line A-A′ of  FIG.  5   , respectively. 
     Referring to  FIGS.  6  to  8   , the guide member  40  may include a plurality of links  415  and  425  arranged below the flow adjusting device  30  and configured to change the state of the flow adjusting device  30 . 
     Each end of each of the plurality of links  415  and  425  may be pivotably connected to an inner portion of the guide member  40 , and the other end of each of the plurality of links  415  and  425  may be pivotably connected to a portion disposed on a bottom surface of the flow adjusting device  30 . The flow adjusting device  30  may be configured to vary the discharge direction of the air by pivoting of at least one of the plurality of links  415  and  425  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  to ascend and descend, a guide connector  420  disposed to pivot by being coupled to a bottom surface of the flow adjusting device  30  and a portion of the second housing  410 , respectively, a first link  415  having one end coupled to an inner portion of the first housing  400  and the other end coupled to an inner portion of the guide connector  420 , and a second link  425  disposed to be spaced apart from the first link  415 , and having one end coupled to the inner portion of the first housing  400  and the other end coupled to the inner portion of the guide connector  420 . In this connection, the second link  425  may have a length smaller than that of the first link  415 . 
     The bottom surface of the flow adjusting device  30  may have a convex portion protruding toward the first housing  400 , and a side wall of the guide connector  420  may have a concave portion having a shape corresponding to the convex portion of the flow adjusting device  30 . The bottom surface of the flow adjusting device  30  and the side wall of the guide connector  420  may be engaged with each other. The bottom surface of the flow adjusting device  30  and the side wall of the guide connector  420  may be fastened to each other and fixed via various methods such as fitting fastening, rivet fastening, and screw fastening. 
     In an exemplary embodiment, a space in which the second housing  410  may be accommodated may be defined inside the first housing  400 . The space defined inside the first housing  400  may have a larger volume than the second housing  410  such that the second housing  410  does not collide with an inner wall of the first housing  400  when pivoting. In one embodiment, the inner wall of the first housing  400  may have a partially curved portion, and the second housing  410  may pivot along the curved portion of the inner wall of the first housing  400 . 
     A space in which the first link  415  and the second link  425  may pivot may be defined inside the second housing  410 , and a space in which the other end of the first link  415  and the other end of the second link  425  may pivot may be defined inside the guide connector  420 . 
       FIGS.  6  to  8    illustrate that each of the first housing  400 , the second housing  410 , and the guide connector  420  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  420  may have various shapes within a range that does not impair an original function thereof. 
     In addition, although not shown, an inner circumferential surface of the guide connector  420  covered by the second housing  410  may include openings respectively communicating with the first link  415  and the second link  425 , and each of the openings may extend by a radius at which each of the first link  415  and the second link  425  pivots. 
     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 first housing  400  may include a first link connector  413  disposed to be coupled to one end of the first link  415 , and the guide connector  420  may include a second link connector  417  disposed to be coupled to the other end of the first link  415 . One end of the first link  415  may be connected to the first link connector  413  to pivot about the first link connector  413 , and the other end of the first link  415  may be connected to the second link connector  417  to pivot about the second link connector  417 . 
     The first housing  400  may further include a third link connector  423  disposed to be coupled to one end of the second link  425 , and the guide connector  420  may further include a fourth link connector  427  disposed to be coupled to the other end of the second link  425 . One end of the second link  425  may be connected to the third link connector  423  to pivot about the third link connector  423 , and the other end of the second link  425  may be connected to the fourth link connector  427  to pivot about the fourth link connector  427 . 
     In an exemplary embodiment, the shortest distance between the guide connector  420  and the third link connector  423  may be smaller than the shortest distance between the guide connector  420  and the first link connector  413 . 
     In an exemplary embodiment, the second link connector  417  may be disposed inside the guide connector  420  to be spaced apart from an inner circumferential surface of the guide connector  420 , and the fourth link connector  427  may be disposed inside the guide connector  420  to be adjacent to an inner circumferential surface of the guide connector  420 . 
     In an exemplary embodiment, the second link  425  may be located inside the first housing  400  and forward of the first link  415  in the horizontal direction, and may be disposed relatively adjacent to the inner wall of the first housing  410 . 
     The second link  425  may be configured to pivot in the same direction as a pivot direction of the first link  415  when the first link  415  pivots. That is, when the first link  415  pivots in one direction (shown as a counterclockwise direction in  FIGS.  6  to  8   , and hereinafter, referred to as a first direction) about the first link connector  413 , the second link  425  indirectly connected to the first link  415  through the guide connector  420  may also pivot in the first direction about the third link connector  423 . 
     In addition, because the guide connector  420  is coupled to a portion of the second housing  410 , as the first link  415  pivots, the second housing  410  may also pivot about the first link connector  413  together with the first link  415 . 
     In one example, when the first link  415  pivots in the first direction, the guide connector  420  may be configured to pivot in a direction (shown in a clockwise direction in  FIGS.  6  to  8   , and hereinafter, referred to as a second direction) opposite to the pivot direction of the first link  415 . The fourth link connector  427  disposed inside the guide connector  420  may also pivot in the second direction together with the guide connector  420 . That is, the fourth link connector  427  may be connected to the second link connector  417  to pivot about the second link connector  417 , as shown in  FIG.  6   . 
     When the first link  415  and the second housing  410  pivot together in the first direction about the first link connector  413  in the first direction, the guide connector  420  disposed at a distance from the first link connector  413  may be controlled to ascend from the first housing  400 . 
     The guide connector  420  may be configured to pivot in the second direction while being controlled to ascend from the first housing  400 , and the fourth link connector  427  disposed inside the guide connector  420  may also be configured to pivot in the second direction together with the guide connector  420 . 
     Specifically, the guide connector  420  may be connected to the first link  415  through the second link connector  417 , and may be connected to the second link  425  through the fourth link connector  427 . In this connection, the second link  425  having the length smaller than that of the first link  415  may be disposed forward of the first link  415  in the horizontal direction, the fourth link connector  427  to which the other end of the second link  425  is coupled is disposed to be spaced apart from the inner circumferential surface of the guide connector  420 , and the second link connector  417  to which the other end of the first link  415  is coupled is disposed adjacent to the inner circumferential surface of the guide connector  420 . Therefore, when the first link  415  and the second housing  410  pivot together, the guide connector  420  may be controlled to ascend from the first housing  400 , and at the same time, be controlled to pivot in the second direction. In this connection, the fourth link connector  427  disposed adjacent to the inner circumferential surface of the guide connector  420  may be controlled to pivot about the second link connector  417  disposed to be spaced apart from the inner circumferential surface of the guide connector  420 . 
     Accordingly, as the second housing  410  pivots in the first direction, and at the same time, the guide connector  420  pivots in the second direction, the state of the flow adjusting device  30  may be changed from the state 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 state in which the flow adjusting device  30  is oriented in the first position to the state 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 state in which the flow adjusting device  30  is oriented in the third position. 
     In one example, the concept of the operation method of the guide connector  420  described so far may be applied in reverse. That is, when the second housing  410  pivots in the second direction, the guide connector  420  may be configured to descend toward the first housing  410 , and at the same time, to pivot in the first direction. At this time, the fourth link connector  427  disposed adjacent to the inner circumferential surface of the guide connector  420  may also be configured to pivot in the first direction together with the guide connector  420 . 
     Accordingly, as the second housing  410  pivots in the second direction, and at the same time, the guide connector  420  pivots in the first direction, the state of the flow adjusting device  30  may be changed from the state 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 state in which the flow adjusting device  30  is oriented in the third position to the state 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 state in which the flow adjusting device  30  is oriented in the first position. 
     Referring to  FIGS.  7  and  8    together, as the state of the flow adjusting device  30  changes from the first position to the third position, each of the second link connector  417  and the fourth link connector  427  may be positioned at a higher vertical level than before. In this connection, because the second link  425  may have the length smaller than that of the first link  415 , a vertical level increase degree of the fourth link connector  427  connected to the other end of the second link  425  may be less than a vertical level increase degree of the second link connector  417  connected to the other end of the first link  415 . Accordingly, the fourth link connector  427  may be disposed at a lower vertical level than the second link connector  417  in a state in which the flow adjusting device  30  is oriented in the second position or the third position. 
     Referring to  FIG.  6    again, the first link  415  and the second link  425  may be arranged on different planes, and the first link  415  and the second link  425  may respectively have portions overlapping with each other while the flow adjusting device  30  is oriented in the first position. However, the concept of the present disclosure is not necessarily limited thereto. That is, the first link  415  and the second link  425  may be arranged on the same plane. In this case, the first link  415  and the second link  425  may not respectively have the portions overlapping with each other while the flow adjusting device  30  is oriented in the first position. Otherwise, the first link  415  and the second link  425  may be arranged on different planes, and may not respectively have the portions overlapping with each other while the flow adjusting device  30  is oriented in the first position. 
     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 links  415  and  425 . In this connection, said one end of each of the plurality of links  415  and  425  may be pivotably connected to an inner portion of the guide member  40 , and the other end of each of the plurality of links  415  and  425  may be pivotably connected to a portion disposed on the bottom surface of the flow adjusting device  30 . The flow adjusting device  30  may be configured to vary the discharge direction of the air by the pivoting of the at least one of the plurality of links  415  and  425  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 operations of the plurality of links  415  and  425 . The state 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.