Patent Publication Number: US-2022212133-A1

Title: Air purifier

Description:
TECHNICAL FIELD 
     The present disclosure relates to an air purifier. 
     BACKGROUND ART 
     An air purifier is understood as a device that suctions polluted air, purifies the polluted air, and then discharges the purified air. For example, the air purifier may include a blower for flowing external air in the air purifier and a filter capable of filtering dust, bacteria, or the like in the air. 
     In general, an air purifier is configured to purify an indoor space such as a home or an office. While the air purifier can purify the surrounding air, there is a problem that it is difficult to purify the air in a space far away from the air purifier. In order to solve this problem, the present applicant has disclosed the following prior document. 
     1. Publication number (publication date): KR 10-2017-0101093 (Sep. 5, 2017) 
     2. Title of Invention: Air Purifier 
     According to the prior document, an air purifier in which a first blowing unit and a second blowing unit are disposed in a vertical direction is disclosed. Disclosed is an air purifier capable of discharging air in various directions to the first blowing unit and the second blowing unit disposed in a vertical direction and allowing air to reach a long distance. 
     However, there is a problem in that the interior of the air purifier is complicated because a plurality of wires are disposed inside the air purifier to supply power to the first blowing unit and the second blowing unit. In addition, since the first blowing unit and the second blowing unit are connected by wiring, it is complicated to separate or couple the first blowing unit and the second blowing unit. In addition, a malfunction of the air purifier is caused by a problem such as a wire disconnection or connecting the wiring incorrectly in the process of separating or combining the first blowing unit and the second blowing unit. 
     DISCLOSURE 
     Technical Problem 
     The present disclosure can provide an air purifier in which the internal structure of the body is simplified. 
     The present disclosure may provide an air purifier that facilitates coupling or separation of different blowers. 
     The present disclosure may provide an air purifier capable of adjusting whether power is supplied according to whether different blowers are coupled. 
     The present disclosure can provide an air purifier capable of removing wires connecting different blowers. 
     Technical Solution 
     The air purifier according to the present disclosure can be configured to simplify the internal structure of the air purifier body by removing wires for connecting different blowers. In addition, it is possible to reduce the manufacturing cost of the air purifier by simplifying the internal structure of the air purifier body. 
     In the air purifier according to the present disclosure, power is supplied from one of the two blowers to the other blower according to whether the first blower and the second blower coupled in the vertical direction are coupled to each other, so that the first blower and the second blower may be operated together. 
     The air purifier according to the present disclosure can prevent safety accidents that may occur during the power supply process by configuring the blowers to supply power in a wireless power supply method. 
     Advantageous Effect 
     According to the present disclosure, it is possible to easily separate or couple a plurality of blowers disposed in the vertical direction. 
     According to the present disclosure, by removing the wiring for connecting a plurality of blowers, it is possible to prevent a problem that may be caused by wiring between a plurality of blowers. 
     According to the present disclosure, there is an advantage in that the internal cleaning and maintenance of the air purifier is easy by configuring a plurality of blowers to be easily separated. 
     According to the present disclosure, since the air purifier is configured by modularizing a blower that transmits wireless power or receives wireless power, the manufacturing cost of the air purifier can be reduced and the manufacturing efficiency of the air purifier can be increased. 
     According to the present disclosure, since the air purifier is configured as a modularized blower, the user can utilize the modularized blower in various ways. 
    
    
     
       DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view illustrating an outer appearance of an air purifier according to an embodiment of the present disclosure. 
         FIG. 2  is a perspective view illustrating an internal configuration of an air purifier according to an embodiment of the present disclosure. 
         FIG. 3  is a cross-sectional view taken along III-III′ of  FIG. 2 . 
         FIG. 4  is an exploded perspective view illustrating the configuration of a first blower according to an embodiment of the present disclosure. 
         FIG. 5  is an exploded perspective view illustrating the configuration of a first fan and a first guide device according to an embodiment of the present disclosure. 
         FIG. 6  is a cross-sectional view illustrating a partial configuration of a first blower according to an embodiment of the present disclosure. 
         FIG. 7  is an exploded perspective view illustrating a partial configuration of a partitioning part and a first blower according to an embodiment of the present disclosure. 
         FIGS. 8 and 9  are exploded perspective views illustrating the configuration of a second blower according to an embodiment of the present disclosure. 
         FIG. 10  is a cross-sectional view illustrating the configuration of a second blower according to an embodiment of the present disclosure. 
         FIG. 11  is a view illustrating a state where the first blower and the second blower are coupled according to an embodiment of the present disclosure. 
         FIG. 12  is a view illustrating a state where power is supplied from a first blower to a second blower according to an embodiment of the present disclosure. 
         FIG. 13  is a view illustrating a state of a power transmitter and a power receiver according to an embodiment of the present disclosure. 
         FIGS. 14 to 16  are views illustrating a state where air flows in the air purifier according to an embodiment of the present disclosure. 
     
    
    
     BEST MODE 
     Hereinafter, some embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be noted that when components in the drawings are designated by reference numerals, the same components have the same reference numerals as far as possible even though the components are illustrated in different drawings. Further, in description of embodiments of the present disclosure, when it is determined that detailed descriptions of well-known configurations or functions disturb understanding of the embodiments of the present disclosure, the detailed descriptions will be omitted. 
     Also, in the description of the embodiments of the present disclosure, the terms such as first, second, A, B, (a) and (b) may be used. Each of the terms is merely used to distinguish the corresponding component from other components, and does not delimit an essence, an order or a sequence of the corresponding component. It should be understood that when one component is “connected”, “coupled” or “joined” to another component, the former may be directly connected or jointed to the latter or may be “connected”, coupled” or “joined” to the latter with a third component interposed therebetween. 
       FIG. 1  is a perspective view illustrating an outer appearance of an air purifier according to an embodiment of the present disclosure. 
     Referring to  FIG. 1 , the air purifier  10  according to an embodiment of the present disclosure includes blowers  100  and  200  for generating an air flow, and a flow change device  300  for changing the discharge direction of the air flow generated by the blowers  100  and  200 . 
     The blowers  100  and  200  include a first blower  100  for generating a first air flow and a second blower  200  for generating a second air flow. 
     The first blower  100  and the second blower  200  may be disposed in a vertical direction. For example, the second blower  200  may be disposed above the first blower  100 . In this case, the first air flow forms a flow for suctioning indoor air existing on the lower side of the air purifier  10 , and the second air flow forms for suctioning indoor air existing on the upper side of the air purifier  10 . 
     The air purifier  10  includes cases  101  and  201  that form an outer appearance. 
     In detail, the cases  101  and  201  include a first case  101  that forms an outer appearance of the first blower  100 . The first case  101  may have a cylindrical shape. In addition, the upper portion of the first case  101  may be configured to have a smaller diameter than the lower portion thereof. In other words, the first case  101  may have a conical shape with an end cut off. 
     The first case  101  includes a first separation part  101   a  to or from which two parts constituting the first case  101  are coupled or separated. In addition, the first case  101  further includes a hinge part (not illustrated) provided opposite the first separation part  101   a.  The two parts may rotate about the hinge part. 
     When at least one of the two parts rotates, the first case  101  is opened and can be separated from the air purifier  10 . An engaging device may be provided at a portion where the two parts are coupled, that is, on the opposite side of the hinge part. The engaging device may include an engaging protrusion or a magnet member. By opening the first case  101 , internal parts of the first blower  100  may be replaced or repaired. 
     A first suctioning part  102  through which air is suctioned is formed in the first case  101 . The first suctioning part  102  includes a through-hole through which at least a portion of the first case  101  is penetrated. A plurality of first suctioning parts  102  are formed. 
     The plurality of first suctioning parts  102  are uniformly formed along the outer circumferential surface of the first case  101  in the circumferential direction so that air can be suctioned in any direction with respect to the first case  101 . In other words, air may be suctioned in a 360 degree direction based on the vertical center line passing through the inner center of the first case  101 . 
     As described above, since the first case  101  has a cylindrical shape and a plurality of the first suctioning parts  102  are formed along the outer circumferential surface of the first case  101 , the amount of air suctioning can be increased. In addition, by avoiding the hexahedral shape having the corners, there is an effect that the flow resistance to the suctioned air can be reduced. 
     Air suctioned through the first suctioning part  102  may flow in a substantially radial direction from the outer circumferential surface of the first case  101 . The direction is defined as follows. Based on  FIG. 1 , the vertical direction is called an axial direction, and the horizontal direction is called a radial direction. The axial direction may correspond to the central axis direction of the first fan  160  and the second fan  260  to be described below, that is, the motor shaft direction of the fan. In addition, the radial direction may be understood as a direction perpendicular to the axial direction. 
     In addition, the circumferential direction is understood as an imaginary circle direction formed when rotating with the axial direction as the center and the distance in the radial direction as the rotation radius. 
     The first blower  100  further includes a base  20  provided under the first case  101  and placed on the ground. The base  20  is positioned downwardly spaced apart from the lower end portion of the first case  101 . A base suctioning part  103  is formed in a separation space between the first case  101  and the base  20 . 
     Air suctioned through the base suctioning part  103  may flow upward through the suctioning port  112  of the suctioning grill  110  (refer to  FIG. 2 ) provided on the upper side of the base  20 . 
     In other words, the first blower  100  includes a plurality of suctioning parts  102  and  103 . Air existing in the lower part of the indoor space may easily flow into the first blower  100  through the plurality of suctioning parts  102  and  103 . Accordingly, the amount of air suctioning can be increased. 
     A first discharge part  105  is formed at an upper portion of the first blower  100 . The first discharge part  105  may be formed on the first discharge grill  195  of the first discharge guide  190  provided in the first blower  100 . The first discharge guide  190  forms an outer appearance of the upper end portion of the first blower  100 . Air discharged through the first discharge part  105  may flow upward in the axial direction. 
     The cases  101  and  201  may include a second case  201  that forms an outer appearance of the second blower  200 . The second case  201  may have a cylindrical shape. In addition, the upper portion of the second case  201  may be configured to have a smaller diameter than the lower portion thereof. In other words, the second case  201  may have a conical shape with an end cut off. 
     The second case  201  includes two parts that can be separated or coupled through the second separating part  201   a  and a hinge part. The second case  201  may be configured to be openable like the first case  101 . For a detailed description, the description of the first case  101  is used. By opening the second case  201 , internal parts of the second blower  200  may be replaced or repaired. 
     The diameter of the lower end portion of the second case  201  may be smaller than the diameter of the upper end portion of the first case  101 . Accordingly, in view of the overall shape of the cases  101  and  201 , the lower cross-sectional areas of the cases  101  and  201  are formed to be larger than the upper cross-sectional areas, and thus the air purifier  10  can be stably supported on the ground. 
     A second suctioning part  202  through which air is suctioned is formed in the second case  201 . The second suctioning part  202  includes a through-hole through which at least a portion of the second case  201  is penetrated. A plurality of second suctioning parts  202  are formed. 
     The plurality of second suctioning parts  202  are uniformly formed along the outer circumferential surface of the second case  201  in the circumferential direction so that air can be suctioned in any direction with respect to the second case  201 . In other words, air may be suctioned in a 360 degree direction based on the vertical center line passing through the inner center of the second case  201 . 
     As described above, since the second case  201  is configured in a cylindrical shape and a plurality of the second suctioning parts  202  are formed along the outer circumferential surface of the second case  201 , an amount of air suctioning may be increased. In addition, by avoiding the hexahedral shape having the corners, there is an effect that the flow resistance to the suctioned air can be reduced. 
     Air suctioned through the second suctioning part  202  may flow from the outer circumferential surface of the second case  201  in a substantially radial direction. 
     The air purifier  10  includes a partitioning part  400  provided between the first blower  100  and the second blower  200 . By the partitioning part  400 , the second blower  200  may be positioned to be spaced apart from the upper side of the first blower  100 . In this embodiment, the partitioning part  400  may be mounted on the lower portion of the second blower  200 . The second blower  200  and the partitioning part  400  may be separated from the first blower  100 . 
     The flow change device  300  may be installed above the second blower  200 . Based on the air flow, the air flow path of the second blower  200  may communicate with the air flow path of the flow change device  300 . The air that has passed through the second blower  200  may pass through the air flow path of the flow change device  300  and be discharged to the outside through the second discharge part  305 . The second discharge part  305  is formed at the upper end portion of the flow change device  300 . 
     The flow change device  300  may be movably provided. For example, the flow change device  300  may be in a lying state (first position) or in an inclined erect state (second position). 
     A display device (not illustrated) for displaying operation information of the air purifier  10  may be provided at an upper portion of the flow change device  300 . The display device may move together with the flow change device  300 . 
       FIG. 2  is a perspective view illustrating an internal configuration of an air purifier according to an embodiment of the present disclosure,  FIG. 3  is a cross-sectional view taken along III-III′ of  FIG. 2 ,  FIG. 4  is an exploded perspective view illustrating the configuration of a first blower according to an embodiment of the present disclosure,  FIG. 5  is an exploded perspective view illustrating the configuration of a first fan and a first guide device according to an embodiment of the present disclosure,  FIG. 6  is a cross-sectional view illustrating a partial configuration of a first blower according to an embodiment of the present disclosure, and  FIG. 7  is an exploded perspective view illustrating a partial configuration of a partitioning part and a first blower according to an embodiment of the present disclosure. 
     Referring to  FIGS. 2 to 7 , the first blower  100  according to an embodiment of the present disclosure includes a base  20  and a suctioning grill  110  disposed above the base  20 . 
     The base  20  includes a base main body  21  placed on the ground and a base protrusion  22  protruding upward from the base main body  21  and on which the suctioning grill  110  is placed. 
     By the base protrusion  22 , the base main body  21  and the suctioning grill  110  are spaced apart from each other. Between the base  20  and the suctioning grill  110 , a base suctioning part  103  for forming an air suctioning space is provided. 
     The base  20  may further include an electric space  25  in which a first PCB part  500  to be described below can be installed therein. The first PCB part  500  may be disposed in any one of an installation space part or the electric space  25  to be described below. In this embodiment, it will be described that the first PCB part  500  is disposed in the installation space part. However, when the first PCB part  500  is disposed in the electric space  25 , there is an effect that the space utilization of the air purifier is improved. 
     The suctioning grill  110  includes a substantially ring-shaped grill main body  111  and a suctioning port  112  formed at an edge of the grill main body  111 . A plurality of suctioning ports  112  may be provided in a state of being spaced apart along the edge. In addition, the plurality of suctioning ports  112  may communicate with the base suctioning part  103 . 
     Air suctioned through the suctioning port  112  and the base suctioning part  103  may pass through the first filter member  120 . In other words, air may pass through the outer circumferential surface of the cylindrical first filter member  120  and flow into the first filter member  120 . In other words, the first filter member  120  may have a cylindrical shape and have a filter surface for filtering air. 
     In the suctioning grill  110 , a lever supporting part  113  that forms an upper surface of the grill main body  111  and supports the first lever device  142 , and a groove part  114  formed to be recessed in the inner radial direction from an outer circumferential surface of the grill main body  111  are further provided. The groove part  114  may provide a space in which the first handle  144 , which will be described below, can move. 
     The first blower  100  includes a first lever device  142  provided above the suctioning grill  110  and operable by a user. 
     The first lever device  142  includes a lever main body  143  that has a substantially ring shape and is rotatably provided. 
     The lever main body  143  includes a lever protrusion  145  provided on the edge of the lever main body  143 . The lever protrusion  145  may protrude upward from the upper surface of the edge of the lever main body  143  and a plurality of lever protrusion may be provided in a state of being spaced apart from each other. The plurality of lever protrusions  145  is understood as a configuration having an inclined surface in order to move the first support device  140  to be described below upward or downward. 
     A first handle  144  is provided on the outer circumferential surface of the lever main body  143 . The user may rotate the lever main body  143  clockwise or counterclockwise by griping the first handle  144 . 
     A first support device  140  for supporting the first filter member  120  is provided above the first lever device  142 . The first lever device  142  supports the lower surface of the first support device  140 . A support protrusion (not illustrated) in contact with the lever protrusion  145  may be provided in the first support device  140 . The support protrusion may protrude downward from the lower surface of the first support device  140 , and a plurality of support protrusions may be provided in the number corresponding to the lever protrusion  145 . In addition, the support protrusion includes an inclined surface. 
     While the lever main body  143  rotates, the lever protrusion  145  may be rotated together with the lever main body  143 . At this time, when the upper portion of the lever protrusion  145  comes into contact with the lower portion of the support protrusion, the lever main body  143  pushes the first supporting device  140  upward. When the first supporting device  140  moves upward, the first filter member  120  is in a state of being coupled to the first blower  100 . 
     On the other hand, when the lower portion of the lever protrusion  145  comes into contact with the upper portion of the support protrusion, the first supporting device  140  descends downward. In addition, when the first support device  140  descends downward, the first filter member  120  is in a separable state (released state) from the first blower  100 . 
     The first blower  100  further includes a first filter frame  130  forming a mounting space for the first filter member  120 . In detail, the first filter frame  130  includes a first frame  131  forming a lower portion of the first filter frame  130  and a second frame  132  forming an upper portion of the first filter frame  130 . 
     The first frame  131  has a ring shape in which approximately a portion thereof is cut off. The ring-shaped inner space of the first frame  131  forms at least a portion of an air flow path passing through the first filter frame  130 . 
     The first lever device  142  and the first support device  140  may be positioned on the inner circumferential side of the first frame  131 . The upper surface of the first supporting device  140  includes a seating surface on which the first filter member  120  is placed. In addition, a first handle space part  131   a  allowing the first handle  144  of the first lever device  142  to be manipulated is defined in the cut-out partial space of the first frame  131 . The first handle  144  is positioned in the first handle space part  131   a  and may be manipulated in a clockwise or counterclockwise direction. 
     The second frame  132  is positioned upwardly spaced apart from the first frame  131 . The second frame  132  has a substantially ring shape. The ring-shaped inner space of the second frame  132  forms at least a portion of an air flow path passing through the first filter frame  130 . In addition, an upper portion of the second frame  132  may support a first fan housing  150  to be described below. 
     The first filter frame  130  further includes a first filter support part  135  extending upwardly from the first frame  131  toward the second frame  132 . The first and second frames  131  and  132  may be spaced apart from each other by the first filter support part  135 . A plurality of first filter support parts  135  may be provided, and the plurality of first filter support parts  135  may be arranged in a circumferential direction to be connected to edges of the first and second frames  131  and  132 . 
     A mounting space of the first filter member  120  is defined by the first and second frames  131  and  132  and the plurality of first filter support parts  135 . 
     In the mounting space, the first filter member  120  may be detachably mounted. The first filter member  120  has a cylindrical shape, and air may flow through the outer circumferential surface of the first filter member  120  thereinto. In the process of passing through the first filter member  120 , impurities such as fine dust in the air may be filtered out. 
     The first filter member  120  may be formed in a cylindrical shape. The first filter member  120  includes one or more filter parts  121 . The filter part  121  may form an inflow surface in which air flows. The upper end and lower end of the filter part  121  may be fixed by a filter frame. The filter frame disposed at the lower end of the filter part  121  may be referred to as a first filter frame. The filter frame disposed on the upper end of the filter part  121  may be referred to as a second filter frame. At least one of the first and second filter frames further includes a handle  121   a.  The first filter member  120  includes an outlet  122  through which the air passing through the filter part  121  is discharged. The outlet  122  is disposed in the axial direction of the first filter member  120 . In other words, the air flowing in the radial direction through the filter part  121  may flow in the axial direction through the outlet  122 . 
     Since the first filter member  120  has a cylindrical shape, air can flow in any direction with respect to the first filter member  120 . Accordingly, the filtering area of the air can be increased. 
     The mounting space may be provided in a cylindrical shape corresponding to the shape of the first filter member  120 . The first filter member  120  may be slidably retracted toward the mounting space during the mounting process. Conversely, the first filter member  120  may be slidably drawn out from the mounting space during the separation process. 
     In other words, when the first handle  144  is manipulated while the first filter member  120  is placed on the upper surface of the first support device  140 , the first filter member  120  is in the released position while moving downward. In addition, the first filter member  120  may be separated from the mounting space by sliding outward in the radial direction. 
     On the other hand, in a state where the first filter member  120  is separated from the mounting space, the first filter member is slid radially inward toward the mounting space to be supported on the upper surface of the first support device  140 , and the first filter member can be in close contact upward by the manipulation of the first handle  144 . At this time, the first filter member  120  is in the coupled position. 
     Meanwhile, the first support part cover  136  may be coupled to the outside of the first filter support part  135 . 
     The first blower  100  further includes a first fan housing  150  installed at the outlet side of the first filter member  120 . A first fan  160  is received in the first fan housing  150 . In addition, the first fan housing  150  may be supported by the first filter frame  130 . 
     A first fan inlet  151  for guiding the inflow of air into the first fan housing  150  is provided at a lower portion of the first fan housing  150 . A grill is provided in the first fan inlet  151  to prevent a user from inserting a finger or the like into the inside of the first fan housing  150  when the first filter member  150  is separated. 
     The first fan  160  is placed above the first fan inlet  151 . For example, the first fan  160  includes a centrifugal fan that flows air in an axial direction and discharges air upward in a radial direction. 
     In detail, the first fan  160  includes a hub  161  to which a rotation shaft  165   a  of a first fan motor  165 , which is a centrifugal fan motor, is coupled, a shroud  162  disposed in a state of being spaced apart from the hub  161 , and a plurality of blades  163  disposed between the hub  161  and the shroud  162 . The first fan motor  165  may be coupled to the upper side of the first fan  160 . 
     The hub  161  may have a bowl shape in which the diameter thereof becomes narrower toward the lower side. In addition, the hub  161  includes a shaft coupling part to which the rotation shaft  165   a  is coupled, and a first blade coupling part extending obliquely upward from the shaft coupling part. 
     The shroud  162  includes a lower end portion in which a shroud suctioning port  162   a  through which air passing through the first fan inlet  151  is suctioned is formed, and a second blade coupling part extending upward from the lower end part. 
     One surface of the blade  163  may be coupled to the first blade coupling part of the hub  161 , and the other surface thereof may be coupled to the second blade coupling part of the shroud  162 . In addition, the plurality of blades  163  may be disposed to be spaced apart from each other in a circumferential direction of the hub  161 . 
     The blade  163  includes a leading edge  163   a  forming a side end portion in which air flows and a trailing edge  163   b  forming a side end portion at which air is discharged. 
     The air passing through the first filter member  120  flows upward and flows into the first fan housing  150  through the first fan inlet  151 . In addition, the air flows in the axial direction of the first fan  160 , flows into the first leading edge  163   a,  and flows out to the trailing edge  163   b  through the blade  163 . 
     At this time, so that the air flowing out through the trailing edge  163   b  can flow upward in the radial direction, the trailing edge  163   b  may extend obliquely upward and outward with respect to the axial direction corresponding to the flow direction of the air. 
     The first blower  100  further includes a first air guide  170  coupled to the upper side of the first fan  160  to guide the flow of air passing through the first fan  160 . 
     The first air guide  170  includes an outer wall  171  having a cylindrical shape and an inner wall  172  positioned inside the outer wall  171  and having a cylindrical shape. The outer wall  171  is disposed to surround the inner wall  172 . A first air flow path  172   a  through which air flows is formed between the inner circumferential surface of the outer wall  171  and the outer circumferential surface of the inner wall  172 . 
     The first air guide  170  includes a guide rib  175  disposed in the first air flow path  172   a.  The guide rib  175  extends from the outer circumferential surface of the inner wall  172  to the inner circumferential surface of the outer wall  171 . A plurality of the guide ribs  175  may be disposed to be spaced apart from each other. The plurality of guide ribs  175  perform a function of upwardly guiding the air flowing into the first air flow path  172   a  of the first air guide  170  through the first fan  160 . 
     The guide rib  175  may extend obliquely upward from the lower portions of the outer wall  171  and the inner wall  172 . For example, the guide rib  175  is formed to be round and guides the air to flow in an inclined upward direction. 
     The first air guide  170  further includes a motor receiving part  173  extending downward from the inner wall  172  to receive the first fan motor  165 . The motor receiving part  173  may have the shape of a bowl whose diameter decreases toward the bottom. A motor coupling part  166  is provided on one side of the first fan motor  165 , and the motor coupling part  166  guides to fix the first fan motor  165  to the first air guide  170 . 
     The motor receiving part  173  may include a fastening rib  178 . The motor coupling part  166  may be fastened to the fastening rib  178  by a fastening member. The fastening rib  178  may be provided to protrude upward from the upper surface of the motor receiving part  173 . A plurality of fastening ribs  178  may be provided. 
     The shape of the motor receiving part  173  may correspond to the shape of the hub  161 . In addition, the motor receiving part  173  may be inserted inside the hub  161 . 
     The first fan motor  165  may be supported on the upper side of the motor receiving part  173 . In addition, the rotating shaft  165   a  of the first fan motor  165  extends downward from the first fan motor  165  and penetrates the bottom of the motor receiving part  173  to couple to the shaft coupling part  161   a  of the hub  161 . 
     The first blower  100  further includes a second air guide  180  coupled to the upper side of the first air guide  170  and guiding the air passing through the first air guide  170  to the first discharge guide  190 . The first air guide  170  and the second air guide  180  may be integrally formed. 
     The second air guide  180  includes a first guide wall  181  having a substantially cylindrical shape, and a second guide wall  182  positioned inside the first guide wall  181  and having a substantially cylindrical shape. The first guide wall  181  may be disposed to surround the second guide wall  182 . 
     A second air flow path  185  through which air flows is formed between the inner circumferential surface of the first guide wall  181  and the outer circumferential surface of the second guide wall  182 . The air flowing through the first air flow path  172   a  of the first air guide  170  passes through the second air flow path  185  and flows upward. 
     A fastening guide  183  coupled to the first air guide  170  is provided under the second guide wall  182 . The fastening guide  183  may extend below the second guide wall  182 . 
     A predetermined fastening member is coupled to the fastening guide  183 , and the fastening member may be coupled to the fastening rib  178  of the first air guide  170 . The fastening rib  178  may be provided to protrude upwardly from the upper surface of the motor receiving part  173 . In addition, a plurality of fastening guides  183  and a plurality of fastening rib  178  may be provided. 
     The second air guide  180  further includes a leg support part  187  extending from an inner circumferential surface of the first guide wall  181  to an outer circumferential surface of the second guide wall  182  to support a leg  410  to be described below. The leg support part  187  includes an upper surface to support the lower surface of the leg  410 . In addition, a plurality of the leg support parts  187  may be provided. 
     A first space part  184  in which at least a portion of the first PCB part  500  is received is formed inside the second guide wall  182  having a cylindrical shape. For example, a portion of the first PCB  510 , the first support plate  520 , and the power transmitter  530  of the first PCB part  500  may be positioned in the first space part  184 . 
     The first blower  100  may further include a first discharge guide  190  which is disposed on the upper side of the second air guide  180 , that is, at the outlet side of the air flow based on the air flow path and guides the air discharge to the outside of the air purifier  10 . 
     The first discharge guide  190  includes a first discharge main body  191  forming a second space part  194  in a substantially central portion. For example, the first discharge main body  191  may have an annular shape. 
     At least a portion of the first PCB part  500  may be received in the second space part  194 . For example, the remaining portions of the first PCB  510 , the first support plate  520 , and the power transmitter  530  of the first PCB part  500  may be positioned in the second space part  194 . The second space part  194  is formed above the first space part  184 , and together with the first space part  184 , forms an installation space part in which the first PCB part  500  is installed. In addition, the installation space part may be formed so that the first space part  184 , the second space part  194 , and the motor receiving part  173  communicate with each other. At least one of the first space part  184 , the second space part  194 , and the motor receiving part  173  may be referred to as a lower space part forming a portion of the installation space part. 
     Meanwhile, the second space part  194  may be exposed to the external space when the partitioning part  400  to be described below is separated from the first blower  100 . The second space part  194  exposed to the external space may be shielded by a second space part cover (not illustrated). The second space part cover may be understood as a separate configuration for covering the second space part  194 . The second space part cover may prevent foreign substances from flowing into the first PCB part  500  to be described below by shielding the opened second space part  194 . In addition, the second space part cover further includes a display part. The display part provided on the second space part cover may display the operating state of the first blower  100 . In addition, the second space part cover can be used as a charging support part on which a terminal that can be charged by wireless power transmitted from a power transmitter  530 , which will be described below, is seated. The terminal seated on the second space part cover or the like may be charged by wireless power transmitted from the power transmitter  530 . 
     The first blower  100  includes a first PCB part  500 . The first PCB part  500  includes a first PCB  510 . The first PCB  510  may control components included in the first blower  100 . The first PCB  510  may be referred to as a first control part  510 . 
     The first PCB part  500  may include a first support plate  520  and a first support  525 . The first support plate  520  may be formed in a plate shape. The first PCB  510  may be fixed to the first support plate  520 . The first PCB  510  may be positioned on the upper surface of the first support plate  520 . In this embodiment, the first support plate  520  may be disposed above the first fan motor  165 . In the first support  525 , a bottom surface of the first support plate  520  may extend toward the motor receiving part  173  of the first fan housing  150 . The first support  525  may be fastened to and fixed to the motor receiving part  173 . The first support plate  520  may be positioned in the installation space part. The first support  525  may be positioned at least in the motor receiving part  173 . 
     The first PCB part  500  includes a power transmitter  530 . The power transmitter  530  may transmit wireless power. The power transmitter  530  may transmit wireless power to the second blower  200 . The second blower  200  may be operated by wireless power transmitted from the power transmitter  530 . The operation of the power transmitter  530  may be controlled by the first PCB  510 . The power transmitter  530  may be fixed to the upper surface of the first support plate  520 . 
     The first discharge main body  191  includes a first discharge grill  195 . A plurality of the first discharge grills  195  are provided, and a first discharge part  105  through which air can be discharged to the outside is formed between the plurality of first discharge grills  195 . The plurality of first discharge grills  195  are disposed above the second air flow path  185 , and the air passing through the second air flow path  185  flows toward the first discharge grill  195  and may be discharged through the first discharge part  105 . 
     The first discharge main body  191  includes a leg insertion part  196  into which the leg  410  is inserted. The leg insertion part  196  may be formed between the first discharge grill  195  of any one of the plurality of first discharge grills  195  and the other first discharge grill  195 . A plurality of the leg insertion parts  196  may be provided corresponding to the number of the legs  410 . The leg  410  is inserted into the leg insertion part  196  to extend downward and may be seated on the leg support part  187 . 
     A partitioning part  400  is installed above the first discharge guide  190 . The partitioning part  400  may be disposed between the first blower  100  and the second blower  200 . The second blower  200  may be spaced upwardly from the first blower  100  by the partitioning part  400 . The air discharged from the first blower  100  may be discharged in a direction toward the external space by the partitioning part  400 . Also, the first blower  100  and the second blower  200  may be partitioned by the partitioning part  400 . 
       FIGS. 8 and 9  are exploded perspective views illustrating the configuration of a second blower according to an embodiment of the present disclosure, and  FIG. 10  is a cross-sectional view illustrating the configuration of a second blower according to an embodiment of the present disclosure. 
     Referring to  FIGS. 7 and 8 to 10  together, the second blower  200  according to an embodiment of the present disclosure includes a second support device  240 , a second lever device  242 , a second filter member  220 , a second filter frame  230 , a second fan housing  250 , and a second fan  260 . These configurations are similar to the parts provided in the first blower  100 . Hereinafter, these configurations it will be briefly described, and it is noted in advance that the description of the first blower  100  can be used for the same part. 
     The second support device  240  is provided to be movable upward or downward by manipulation of a handle provided on the second lever device  242  and supports the second filter member  220 . When the second support device  240  moves upward, the second filter member  220  is in a state of being coupled to the second blower  200 . On the other hand, when the second support device  240  moves downward, the second filter member  220  is in a detachable state, that is, in a released state from the second blower  200 . 
     As described in the first lever device  142  and the first support device  140  of the first blower  100 , the second lever device  242  includes a lever protrusion and the second support device  240  includes a support protrusion. As the lever protrusion and the support protrusion interact with each other, the second support device  240  may be moved upwardly or downwardly. For a detailed description, the description of the first blower  100  is used. 
     The second filter member  220  is provided in a cylindrical shape. The air suctioned through the second suctioning part  202  of the second case  201  may pass through the outer circumferential surface of the second filter member  220  to flow inside the second filter member  220 . In other words, the second filter member  220  may have a cylindrical shape filter surface for filtering air. 
     The second filter frame  230  includes a first frame  231  forming a lower portion of the second filter frame  230  and forming a second handle space part  231   a,  a second frame  232  forming an upper portion of the second filter frame  230 , a second filter support part  235  extending upward from the first frame  231  toward the second frame  232 , and a second support part cover  236  covering the second filter support part  235 . The description of the second filter member  220  and the second filter frame  230  uses the description of the first filter member  120  and the first filter frame  130  of the first blower  100 . 
     The second blower  200  further includes a sensor device  237 . The sensor device  237  may include a dust sensor  273   a  for detecting an amount of dust in the air and a gas sensor  273   b  for detecting an amount of gas in the air. In addition, the sensor device  237  further includes a sensor cover  238  capable of covering at least one side of the sensors  273   a  and  273   b.  For example, the sensors  273   a  and  273   b  may be disposed to be supported by the second frame  232  of the second filter frame  230 . Meanwhile, the sensor device  237  may be provided in the first blower  100 . The sensor device provided to the first blower  100  may be referred to as a first sensor device. The sensor device provided to the second blower  200  may be referred to as a second sensor device. The first sensor device may be disposed to be supported by the second frame  132  of the first filter frame  130 . 
     The second fan housing  250  includes a second fan receiving part  252  in which the second fan  260  is received. The second fan housing  250  includes a second fan inlet  251  provided under the second fan housing  250  and guiding the inflow of air into the second fan housing  250 . 
     The second fan  260  includes a hub  261  to which a rotation shaft  265   a  of a second fan motor  265 , which is a centrifugal fan motor, is coupled, a shroud  262  spaced apart from the hub  261 , and a plurality of blades  263  disposed between the hub  261  and the shroud  262 . The description of the second fan housing  250  and the second fan  260  uses the description of the first fan housing  150  and the first fan  160  of the first blower  100 . 
     The second blower  200  further includes an ionizer  258  for removing or sterilizing odor particles in the air. The ionizer  258  is coupled to the second fan housing  250  and may act on air flowing inside the second fan housing  250 . The ionizer  258  may be provided in the first blower  100 . The ionizer provided to the second blower  200  may be referred to as a second ionizer. The ionizer provided to the first blower  100  may be referred to as a first ionizer. The first ionizer may be coupled to the first fan housing  150  and act on air flowing through the inner portion of the first fan housing  150 . 
     The second blower  200  further includes a third air guide device  270  coupled to the upper side of the second fan  260  to guide the flow of air passing through the second fan  260 . 
     The third air guide device  270  includes an outer wall  271  having a cylindrical shape and an inner wall  272  positioned inside the outer wall  271  and having a cylindrical shape. A first air flow path  272   a  through which air flows is formed between the inner circumferential surface of the outer wall  271  and the outer circumferential surface of the inner wall  272 . 
     In addition, the third air guide device  270  includes a guide rib  275  disposed in the first air flow path  272   a.  The guide rib  275  extends from an outer circumferential surface of the inner wall  272  to an inner circumferential surface of the outer wall  271 . 
     The third air guide device  270  further includes a motor receiving part  273  extending downward from the inner wall  272  to receive the second fan motor  265 . The motor receiving part  273  may have the shape of a bowl whose diameter decreases toward the bottom. 
     The second fan motor  265  is coupled to the upper side of the second fan  260  to provide a driving force to the second fan  260 . In addition, a motor coupling part  266  is provided on one side of the second fan motor  265 , and the motor coupling part  266  guides the second fan motor  265  to be fixed to the third air guide device  270 . 
     Among the configurations of the third air guide device  270 , the description of the outer wall  271 , the inner wall  272 , the guide rib  275 , and the motor receiving part  273  uses the description of the corresponding configuration of the first air guide  170 . In addition, the description of the second fan motor  265  and the motor coupling part  266  uses the description of the first fan motor  165  and the motor coupling part  166 . 
     Meanwhile, the third air guide device  270  may further include a guide device (not illustrated) for guiding the movement of the flow adjusting device  300 . 
     The second blower  200  includes a second discharge guide device  280  which is installed above the third air guide device  270  and guides the flow of air passing through the third air guide device  270 . 
     The second discharge guide device  280  may have a substantially annular shape with an empty interior. In detail, the second discharge guide device  280  includes the discharge outer wall  281  which forms the outer circumferential surface of the second discharge guide device  280  and has a cylindrical shape and a discharge inner wall  282  which is positioned inside the discharge outer wall  281 , forms an inner circumferential surface of the second discharge guide device  280 , and has a cylindrical shape. 
     The discharge outer wall  281  is disposed to surround the discharge inner wall  282 . Between the inner circumferential surface of the discharge outer wall  281  and the outer circumferential surface of the discharge inner wall  282 , a discharge flow path through which the air that has passed through the third air guide device  270  flows is formed. The discharge flow path may be positioned above the air flow path provided with the guide rib  275 . 
     The second discharge guide device  280  further includes a second discharge grill  288  disposed in the discharge flow path. The second discharge grill  288  extends from an outer circumferential surface of the discharge inner wall  282  to an inner circumferential surface of the discharge outer wall  281 . 
     A partitioning part  400  may be fixed to a lower side of the second blower  200 . The partitioning part  400  may be coupled to the first blower  100 . In a state where the partitioning part  400  is fixed to the second blower  200 , it may be separated from or coupled to the first blower  100 . In other words, the partitioning part  400  may define a bottom surface of the second blower  200  when the second blower  200  is separated from the first blower  100 . The partitioning part  400  may further include a base for placing the second blower  200  on a bottom surface. 
     The user can use only the first blower  100  by separating the second blower  200  and the partitioning part  400  from the first blower  100 . The air purifier  10  according to the present disclosure may be operated by using a single-stage air purifier using only the first blower  100  and a two-stage air purifier obtained by combining the second blower  200  and the partitioning part  400 . 
     The partitioning part  400  includes legs  410  for separating the first and second blowers  100  and  200  from each other. A separation space between the first and second blowers  100  and  200  may be defined by the legs  410 . A plurality of the legs  410  may be provided while being spaced apart in the circumferential direction. In addition, the leg  410  may extend from the lower part of the separation space toward the upper part thereof, that is, in the axial direction. 
     Through the separation space, the air discharged from the first blower  100 , that is, the air discharged from the first discharge part  105  of the first discharge guide  190  may flow easily. 
     The partitioning part  400  further includes a blocking wall  430  installed between the plurality of legs  410  and extending in a radial direction, that is, a horizontal direction. By the blocking wall  430 , the separation space may be divided into an upper space and a lower space. 
     The air discharged from the first discharge part  105  may be discharged to the outside of the air purifier  10  via a lower space under the blocking wall  430 . By the blocking wall  430 , it is possible to prevent the air discharged from the first discharge part  105  from flowing into the side of the second blower  200 . 
     The partitioning part  400  includes a space part cover  440 . The space part cover  440  may cover an upper side of the second space part  194  to block communication between the second space part  194  and the first discharge part  105 . Accordingly, the air discharged from the first discharge part  105  may be prevented from flowing into the second space part  194  by the space part cover  440 . 
     The space part cover  440  includes a cap-shaped cover main body  441 . Due to the cap shape, the upper space of the second space part  194  of the cover main body  441  can be easily shielded. 
     A first through-hole  444  through which a wiring or a harness provided in the second blower  200  passes is formed in the cover main body  441 . The first through-hole  444  may be formed in a substantially central portion of the upper surface part of the cover main body  441 . 
     The harness is understood as a wire bundle. The wiring or harness may include a wiring connecting the second PCB  610  and the power receiving part  630  to be described below. 
     A first leg groove  446  is formed on the outer circumferential surface of the cover main body  441 . The first leg groove  446  may have a shape recessed from the outer circumferential surface of the cover main body  441  and may be configured to insert at least a portion of the leg  410 . A plurality of the first leg grooves  446  may be provided corresponding to the number of the legs  410 . 
     The partitioning part  400  includes a PCB support part  450 . The PCB support part  450  may have a substantially disk shape and may be configured to have a narrower cross-sectional area toward the bottom. The PCB support part  450  may be disposed above the space part cover  440 . The PCB support part  450  and the space part cover  440  may be coupled to each other in the vertical direction. The second PCB  610  may be supported on the upper surface of the PCB support part  450 . 
     A fixing protrusion  455  for fixing the second PCB  610  is provided on the upper surface of the PCB support part  450 . A predetermined fastening member may be coupled to the fixing protrusion  455 . The fastening member couples the second PCB  610  and the fixing protrusion  455 . 
     A second through-hole  454  communicating with the first through-hole  444  and through which the wiring or harness passes is formed in a substantially central portion of the PCB support part  450 . When the PCB support part  450  and the PCB cover  440  are coupled, the second through-hole  454  and the first through-hole  444  may be vertically aligned. The wiring or the harness may pass through the aligned first and second through-holes  444  and  454 . 
     A second leg groove  456  into which at least a portion of the leg  410  can be inserted is formed in the edge of the PCB support part  450 . The leg  410  is coupled to the PCB cover  440  and the PCB support part  450  through the first and second leg grooves  446  and  456 , passes through a leg insertion part  196  of the first discharge guide  190 , and may be supported by the leg support part  187  of the second air guide  180 . 
     The partitioning part  400  includes a lever support device  460 . The lever support device  460  may be coupled to the upper side of the leg  410  and support the second lever device  242  of the second blower  200 . 
     The lever support device  460  has a substantially annular shape. The lever support device  460  includes a third space part  464  defining an installation space in which the PCB support part  450  and the second PCB  610  may be positioned. The third space part  464  is formed in a substantially central portion of the lever support device  460 . 
     The lever support device  460  further includes a leg coupling part  462  coupled to an upper portion of the leg  410 . The leg coupling part  462  is provided on the edge of the lever support device  460 , and a plurality of the leg coupling parts  462  may be provided corresponding to the number of the legs  410 . In other words, the upper end part of the leg  410  may be coupled to the leg coupling part  462 , and the lower end part thereof may be supported by the leg support part  187  of the second air guide  180 . 
     The lever support device  460  includes a blocking part  461  that blocks the air discharged through the first discharge part  105  from flowing into the second blower  200 . The blocking part  461  may be understood as a main body part of the lever support device  460  having an annular shape. 
     The lever support device  460  may be fixed to a lower portion of the second blower  200 . The PCB support part  450  and the space part cover  440  may be fixed to the lever support device  460 . In other words, the lever support device  460  may be coupled to the lower portion of the second blower  200 , and the partitioning part  400  may be fixed to the second blower  200 . 
     In the present embodiment, the second PCB part  600  is installed inside the partitioning part  400 . The second PCB part  600  may be disposed in the third space part  464 . The second PCB part  600  includes a second PCB  610 . The second PCB  610  may control components included in the second blower  200 . The second PCB  610  may be referred to as a second controller  610 . 
     The second PCB part  600  may include a second support plate  620  and a second support  625 . The second support plate  620  may be formed in a plate shape. The second PCB  610  may be fixed to the second support plate  620 . The second PCB  610  may be positioned on a bottom surface of the second support plate  620 . In this embodiment, the second support plate  620  may be disposed below the second PCB  610 . The second support  625  may be formed by extending the bottom surface of the space part cover  440  downward. The second support  625  may be coupled to the upper surface of the second support plate  620 . 
     The second PCB part  600  includes a power receiver  630 . The power receiver  630  may receive power transmitted from the power transmitter  530  of the first blower  100 . The power receiver  630  may be disposed on a bottom surface of the second support plate  620  to face the power transmitter  530 . When the space part cover  440  shields the second space part  194 , the power transmitter  530  and the power receiver  630  face each other, and wireless power can be transmitted and received. In this embodiment, the power receiver  630  may be disposed inside the lower portion of the space part cover  440 , and the second PCB  610  may be disposed above the PCB support part  450 . The second PCB  610  and the power receiver  630  may be electrically connected to each other by wires or harnesses passing through the first and second through-holes  444  and  454 . Meanwhile, when looking upward from the bottom of the partitioning part  400 , the power receiver  630  may be exposed to the outside. Since the power receiver  630  is disposed to be exposed to the outside, when the space part cover  440  shields the second space part  194 , the power transmitter  530  and the power receiver  630  may be positioned on the installation space part. 
     Meanwhile, the flow adjusting device  300  may be installed above the second discharge guide device  280 . The flow adjusting device  300  may change the discharge direction of the air discharged from the second discharge guide device  280 . The flow adjusting device  300  includes a second discharge part  305  through which the air flowing from the second discharge guide device  280  passes. The flow adjusting device  300  includes a third fan  330  for flowing air, and a third fan motor  335  for rotating the third fan  330 . The air that has passed through the second discharge guide device  280  may be discharged through the second discharge part  305 . In this embodiment, the flow adjusting device  300  may be rotated in the left and right direction and in the vertical direction at the upper side of the second discharge guide device  280 . In other words, the flow adjusting device  300  may change the discharge direction so that the air is discharged in the vertical direction and the left and right direction. The rotation in the left and right direction may be referred to as a first direction rotation, and the rotation in the vertical direction may be referred to as a second direction rotation. A first guide device for guiding the rotation in the first direction and a second guide device for guiding the rotation in the second direction are further provided between the flow adjusting device  300  and the second discharge guide device  280 . 
       FIG. 11  is a view illustrating a state where the first blower and the second blower are coupled according to an embodiment of the present disclosure,  FIG. 12  is a view illustrating a state where power is supplied from a first blower to a second blower according to an embodiment of the present disclosure, and  FIG. 13  is a view illustrating a state of a power transmitter and a power receiver according to an embodiment of the present disclosure. 
     Referring to  FIGS. 11 to 13 , the first blower  100  and the second blower  200  of the air purifier  10  according to the present disclosure may be coupled or separated. When the first blower  100  and the second blower  200  are coupled, it can be operated as a two-stage air purifier. When the first blower  100  and the second blower  200  are separated, it can be operated as a single-stage air purifier. In this embodiment, the second blower  200  and the partitioning part  400  are separated upward with respect to the first discharge guide  190  of the first blower  100  or can be coupled to the first blower  100 . In this case, the second blower  200  and the partitioning part  400  may be understood as one second blower  200 . 
     The first blower  100  may include a power transmitter  530  for transmitting wireless power to the second blower  200 . The second blower  200  may include a power receiver  630  for receiving the wireless power transmitted from the power transmitter  530 . The power transmitter  530  and the power receiver  630  may be operated when the second blower  200  is coupled to the first blower  100 . In this embodiment, wireless power is transmitted from the first blower  100  to the second blower  200 , but wireless power may be configured to be transmitted from the second blower  200  to the first blower  100 . 
     When the second blower  200  is coupled to the first blower  100 , the power transmitter  530  and the power receiver  630  may be positioned in an installation space part. The installation space part may be defined as a space formed by communicating with at least one of the motor receiving part  173 , the first space part  184 , the second space part  194 , and the third space part  464 . In this embodiment, the installation space part may be formed by communicating with first space part  184 , the second space part  194 , and a portion of the third space part  464  in which the space part cover  440  is positioned. The power transmitter  530  and the power receiver  630  can transmit and receive wireless power within the installation space part defined as one space. The third space part  464  may be referred to as an upper space part forming a part of the installation space part. 
     Hereinafter, a configuration provided in the first blower  100  will be described. 
     The first blower  100  may include a first controller  510 . The first controller  510  may be understood as the first PCB  510  of the first PCB part  500 . The first controller  510  may control the operation of the first blower  100 . The first controller  510  may control the operation of the power transmitter  530 , which will be described below. Wireless power may be transmitted from the power transmitter  530  under the control of the first controller  510 . The first controller  510  may control the operation of the power oscillator  100   c,  which will be described below. 
     The first blower  100  may include a power supply part  100   b.  The power supply part  100   b  may supply power to the first controller  510 . The power supply part  100   b  may supply power to be transmitted from a power transmitter  530  to be described below. The power supply part  100   b  may be understood as a configuration that supplies power for operating the first blower  100 . 
     The first blower  100  may include a power transmitter  530 . The power transmitter  530  may be disposed inside the first blower  100 . For example, the power transmitter  530  may be disposed in an installation space part formed inside the first blower  100 . In this embodiment, the power transmitter  530  may transmit wireless power upward. The configuration of the power transmitter  530  may be changed according to a wireless power transfer method. For example, the power transmitter  530  may be provided as a coil, an antenna, a resonator, or the like. In this embodiment, the power transmitter  530  may transmit wireless power by a magnetic induction method or a magnetic resonance method. When the power transmitter  530  is provided in a magnetic induction method, the power transmitter  530  and the power receiver  630  are disposed to face each other and may be disposed close to each other. When the power transmitter  530  is provided in a magnetic resonance method, the power transmitter  530  and the power receiver  630  may transmit and receive wireless power even if the power transmitter  530  and the power receiver  630  are spaced apart by a predetermined distance. 
     The first blower  100  may include a power oscillator  100   c.  The power oscillator  100   c  may adjust the frequency of the wireless power transmitted from the power transmitter  530 . In this case, the frequency adjusted by the power oscillator  100   c  may be understood as a resonant frequency of the wireless power that can be received by the power receiver  630  to be described below. The wireless power adjusted to a specific frequency by the power oscillator  100   c  may be transmitted from the power transmitter  530 . The operation of the power oscillator  100   c  may be controlled by the first controller  510 . Although referred to as the power oscillator  100   c  in this embodiment, the power oscillator may also be referred to as a power amplifier, a power resonator, or the like. 
     The first blower  100  may include a first fan motor  165 . The operation of the first fan motor  165  may be controlled by the first controller  510 . The first fan motor  165  may be operated by power supplied to the power supply part  100   b.  When the first fan motor  165  is operated, an air flow that is suctioned into the first suctioning part  102  of the first blower  100  and then discharged to the first discharge part  105  may be generated. 
     Hereinafter, a configuration provided in the second blower  200  will be described. 
     The second blower  200  may include a second controller  610 . The second controller  610  may control the operation of the second blower  200 . The second controller  610  may be understood as a second PCB  610  of the second PCB part  600 . The second controller  610  may control the operation of the power receiver  630  to be described below. The wireless power received by the power receiver  630  under the control of the second controller  610  may be supplied to a second fan motor  265  to be described below. The second controller  610  may control the operation of the power rectifier  200   b,  which will be described below. 
     The second blower  200  may include a power receiver  630 . The power receiver  630  may receive wireless power transmitted from the power transmitter  530 . The power receiver  630  may be disposed above the power transmitter  530 . The power receiver  630  may be disposed in one space with the power transmitter  530 . For example, the power receiver  630  may be disposed inside the partitioning part  400 . The power receiver  630  may be positioned in the third space part  464  of the partitioning part  400 . The power receiver  630  may be disposed on the installation space part when the partitioning part  400  is coupled to the first blower  100 . 
     The operation of the power receiver  630  may be controlled by the second controller  610 . The wireless power received by the power receiver  630  may be rectified by a power rectifier  200   b  to be described below and then supplied to the second fan motor  265 . The configuration of the power receiver  630  may be changed according to a wireless power transfer method. For example, the power receiver  630  may be provided as a coil, an antenna, a resonator, or the like. In this embodiment, the power receiver  630  may be configured in a method corresponding to the power transmitter  530  among a magnetic induction method or a magnetic resonance method capable of receiving wireless power transmitted from the power transmitter  530 . 
     The second blower  200  may include a power rectifier  200   b.  The power rectifier  200   b  may adjust the frequency of the wireless power received by the power receiver  630  to the frequency of power that can be consumed by the second fan motor  265 . Power rectified by the power rectifier  200   b  may be supplied to the second fan motor  265 . The operation of the power rectifier  200   b  may be controlled by the second controller  610 . Although referred to as the power rectifier  200   b  in the present embodiment, the power rectifier may also be referred to as a power regulator, a power converter, or the like. 
     The second blower  200  may include a second fan motor  265 . The second fan motor  265  may generate a flow of air that is suctioned into the second suctioning part  202  and then flows to the second discharge part  305 . In this embodiment, the second fan motor  265  may be operated by the power received by the power receiver  630 . The operation of the second fan motor  265  may be controlled by the second controller  610 . 
     Meanwhile, the flow adjusting device  300  coupled to the second blower  200  may be operated by receiving power from the second blower  200 . Alternatively, a power transmitter and a power receiver for transmitting and receiving wireless power may be further included between the second blower  200  and the flow adjusting device  300 . 
     In addition, when the second blower  200  is separated from the first blower  100 , the power supply may be cut off. Accordingly, the second blower  200  may further include a battery for operating the second blower  200 . The battery may be disposed inside the second blower  200 . The battery may be charged by wireless power received by the power receiver  630 . The battery may be understood as a power supply part that enables the second blower  200  to operate even when the second blower  200  is separated from the first blower  100 . An operation of the battery, such as charging of the battery, may be controlled by the second controller  610 . 
     Hereinafter, the configuration of the power transmitter  530  and the power receiver  630  will be described in detail. 
     The power transmitter  530  according to the present disclosure may be configured to transmit wireless power. The power receiver  630  may be configured to receive the wireless power transmitted from the power transmitter  530 . In this embodiment, the power transmitter  530  and the power receiver  630  may transmit and receive wireless power using a magnetic induction method or a magnetic resonance method. In addition, the power transmitter  530  and the power receiver  630  are disposed to face each other, and the wireless power transmitted from the power transmitter  530  may be received by the power receiver  630 . Hereinafter, the structures of the power transmitter  530  and the power receiver  630  configured to transmit and receive wireless power will be described. In this embodiment, the power transmitter  530  and the power receiver  630  may be formed in a coil structure. In this case, the power transmitter  530  may be defined as a primary coil, and the power receiver  630  may be defined as a secondary coil. In other words, the wireless power transmitted from the power transmitter  530  serving as the primary coil may be received by the power receiver  630  serving as the secondary coil. 
     The power transmitter  530  may include a first coil  530   b  and a first coil support part  530   a.  The first coil  530   b  may be provided in a state of being wound in a specific shape. For example, the first coil  530   b  may be supported by the first coil support part  530   a  in a circularly wound state. The first coil  530   b  may be installed in the first blower  100  in a state of being supported by the first coil support part  530   a.  A seating groove in which the first coil  530   b  can be seated may be formed in the first coil support part  530   a.    
     The power transmitter  530  may include a first terminal  530   c.  The first terminal  530   c  may be defined as one end portion and the other end portion of the first coil  530   b  wound in a circle. The first terminal  530   c  may electrically connect the power transmitter  530  and the first controller  510 . In other words, electricity may be applied to the first coil  530   b  through the first terminal  530   c.  The first controller  510  may adjust whether to supply power to the second blower  200  by adjusting whether to transmit wireless power from the power transmitter  530 . 
     When a current is applied to the first coil  530   b  of the power transmitter  530 , an electromagnetic field may be generated in the first coil  530   b.  The electromagnetic field generated in the first coil  530   b  may cause an electromotive force to be induced in the second coil  630   b  of the power receiver  630 , which will be described below. When an electromotive force is induced in the second coil  630   b,  a current may flow in the second coil  630   b  to transmit power to the power receiver  630 . 
     The power receiver  630  may include a second coil  630   b  and a second coil support part  630   a.  The second coil  630   b  may be provided in a wound state in a specific shape. For example, the second coil  630   b  may be supported by the second coil support part  630   a  in a circularly wound state. The second coil  630   b  may be installed in the second blower  200  in a state of being supported by the second coil support  630   a.  A seating groove in which the second coil  630   b  can be seated may be formed in the second coil support part  630   a.    
     The power receiver  630  may include a second terminal  630   c.  The second terminal  630   c  may be defined as one end portion and the other end portion of the second coil  630   b  wound in a circle. The second terminal  630   c  may electrically connect the power receiver  630  and the second controller  610 . In other words, electricity may be applied to the second controller  610  through the second terminal  630   c.    
     The second coil  630   b  of the power receiver  630  may receive the electromagnetic field generated by the first coil  530   b.  When an electromagnetic field is applied to the second coil  630   b,  an electromotive force may be induced in the second coil  630   b.  When an electromotive force is induced in the second coil  630   b,  a current may flow in the power receiver  630 , and power may be supplied to the second power receiver  630 . When the electromagnetic field generated by the power transmitter  530  is not received by the power receiver  630 , the power supply may be stopped. When the power supply to the power receiver  630  is stopped, the power supply to the second blower  200  may be stopped. 
       FIGS. 14 to 16  are views illustrating a state where air flows in the air purifier according to an embodiment of the present disclosure. 
     When the first fan  160  is driven, indoor air is suctioned into the first case  101  through the first suctioning part  102  and the base suctioning part  103 . The suctioned air passes through the first filter member  120 , and, in this process, foreign substances in the air may be filtered. In addition, while the air passes through the first filter member  120 , the air is suctioned in the radial direction of the first filter member  120  and filtered, and then flows upward. 
     The air that has passed through the first filter member  120  flows radially upward while passing through the first fan  160 , and a stable upward flow is achieved while passing through the first and second air guides  170  and  180 . The air passing through the first and second air guides  170  and  180  passes through the first discharge guide  190  and flows upward through the first discharge part  105 . The air discharged through the first discharge part  105  is guided by the partition plate  430  positioned above the first discharge guide  190  and discharged to the outside of the air purifier  10 . 
     When the second fan  260  is driven, indoor air is suctioned into the second case  201  through the second suctioning part  202 . The suctioned air passes through the second filter member  220 , and in this process, foreign substances in the air may be filtered. In addition, while the air passes through the second filter member  220 , the air is suctioned in the radial direction of the first filter member  120  and filtered, and then flows upward. 
     The air passing through the second filter member  220  flows upward in the radial direction while passing through the second fan  160 , and a stable upward flow occurs while passing through the third air guide device  270  and the second discharge guide device  280 . The air that has passed through the third air guide device  270  and the second discharge guide device  280  may be discharged through the second discharge part  305  via the flow adjusting device  300 . 
     The flow adjusting device  300  may be rotatably provided on the upper side of the second blower  200  in the vertical direction and the left and right direction. For example, when the flow adjusting device  300  is in the first position lying as illustrated in  FIG. 15 , the air discharged from the flow adjusting device  300  flows upward. On the other hand, when the flow adjusting device  300  is in the second position erected as illustrated in  FIG. 16 , the air discharged from the flow adjusting device  300  may flow toward the front upper side. By the flow adjusting device  300 , there is an advantage that the air volume discharged from the air purifier  10  is increased, and purified air can be supplied to a location far away from the air purifier  10 . 
     In detail, when the third fan  330  of the flow adjusting device  300  is driven, at least a portion of the air discharged from the second discharge guide device  280  can flow into the third fan housing  310 . In addition, the flowing air thereinto may pass through the third fan  330  and be discharged to the outside through the second discharge part  305 . 
     Meanwhile, when the second blower  200  and the partitioning part  400  are coupled to the first blower  100 , the power transmitter  530  of the first blower  100  can transmit wireless power. The wireless power transmitted from the power transmitter  530  may be received by the power receiver  630  of the second blower  200 . When the power receiver  630  receives wireless power, power for operation may be supplied to the second blower  200 . 
     On the other hand, when the second blower  200  and the partitioning part  400  are separated from the first blower  100 , the second blower  200  may not be operated. According to the present disclosure, in order to operate the second blower  200 , the wiring connected from the first blower  100  to the second blower  200  can be minimized. Accordingly, the structure of the air purifier  10  can be simplified. In addition, since the first blower  100  and the second blower  200  are configured to be easily coupled and separated, the convenience of assembling the air purifier can be improved. In addition, even when the first blower  100  and the second blower  200  are separated, each blower can be operated independently, thereby increasing the utility of the air purifier.