KR102343604B1 - Air cleaning apparatus - Google Patents

Abstract

The air purifier according to an embodiment of the present invention is provided on the upper side of the air purifying module and rotates in the left and right directions on the basis of a vertical rotation axis, a flow control device having a circulation fan, and a user's position within a predetermined distance from the air purifier. A radar sensor that detects, and a position of the user based on the detection result of the radar sensor, and control the rotation angle or the circulation fan of the flow control device based on the confirmed position, the discharge direction or the discharge air volume control unit for regulating.

Description

Air purifier {AIR CLEANING APPARATUS}

The present invention relates to an air purifier, and more particularly, to an air purifier capable of controlling a discharge direction of air based on a user's location.

An air purifier is understood as a device that sucks in polluted air, purifies it, and then discharges the purified air. For example, the air purifier may include a blower for introducing external air into the interior of the air purifier and a filter capable of filtering dust or bacteria in the air.

In general, an air purifier is configured to purify an indoor space such as a home or office. According to the conventional air purifier, the user cannot arbitrarily change the discharge direction of the purified air from the inside of the air purifier, so there is a problem in that it is difficult to quickly deliver the purified air to the location where the user is present.

Recently, an air purifier capable of discharging clean air in various directions by rotating the discharging unit has appeared. However, the user has to directly manipulate the air purifier so that the discharging unit is fixed toward the user's position in order to receive the clean air quickly. Inconvenience exists, and in particular, when a plurality of users exist, since the rotation of the discharge unit must be maintained, there is a problem in that it is difficult to quickly deliver clean air as in the prior art.

1. Unexamined Patent Publication No. 10-1996-0038284 (published on January 21, 1996)

SUMMARY OF THE INVENTION An object of the present invention is to provide an air purifier capable of automatically controlling a discharge direction or intensity of clean air by detecting a location and a change in location of a user existing in the vicinity of the air purifier.

Another object to be solved by the present invention is to provide an air purifier having an arrangement structure of a radar sensor for more effectively detecting a user's location.

The air purifier according to an embodiment of the present invention includes a radar sensor that detects a user's location within a predetermined distance from the air purifier, and purifies the air according to the user's location identified based on the detection result of the radar sensor It may include a controller provided on the upper side of the module to control the rotation angle or fan of the flow control device rotating in the left and right direction to adjust the air discharge direction or air volume.

The radar sensor may be disposed on the upper surface of the flow control device to detect the position of the user present at various angles by rotation of the flow control device.

The flow control device includes a first gear motor generating a driving force for horizontal rotation and a second gear motor generating a driving force for vertical rotation, wherein the flow control device includes a second gear motor when driven is rotated from the first position parallel to the ground to a second position with a predetermined angular inclination upward by the It can be oriented horizontally.

According to an embodiment, the flow control device has a radar sensor fixing part recessed from the top surface to the inside, and fixing the radar sensor to face the radar sensor in the horizontal direction while the flow control device is rotated to the second position is formed. can be

According to an embodiment, the flow control device may include a protrusion fixing part which is formed to protrude on the upper surface and for fixing the radar sensor to face the radar sensor in a horizontal direction in a state in which the flow control device is rotated to the second position. have.

The range of the angle at which the user's position can be detected through the radar sensor may correspond to the sum of the left-right rotation angle of the flow control device and the unique detection angle of the radar sensor.

The air purifier may further include an input unit for inputting a command related to an operation mode for operation of the air cleaning module or the flow control device, and the control unit may change the operation mode to a user tracking operation mode through the input unit. When selected, the user's location may be confirmed by controlling the radar sensor.

The air purifier may further include a display device for displaying operation information of the air purifier, and the control unit is configured to include, when the confirmed user's position is out of a left-right rotation angle of the flow control device, the A notification for guiding to move the installation position of the air purifier or change the installation direction may be displayed through the display device.

The control unit may check the position of the user through the radar sensor during the left and right rotation of the flow control device, and based on the result of the check, the flow control device may be configured such that the discharge unit is fixed toward the user's position. 1 Gearmotor can be controlled.

According to an embodiment, when detecting a change in the user's position through the radar sensor, the controller may control the first gearmotor so that the discharge unit is fixed toward the changed position.

According to an embodiment, the flow control device further includes a fan motor that provides a driving force for rotation of the circulation fan, and the control unit is configured to perform the left and right rotation of the flow control device through the radar sensor. It is possible to check the user's position and control the fan motor to increase the rotational speed of the circulation fan when the discharge part of the rotating flow control device faces the confirmed user's position.

According to an embodiment of the present invention, by using a radar sensor to detect the user's location and control the flow control device to discharge clean air toward the detected location, clean air is delivered to the user quickly and abundantly. It is possible to provide an effect of increasing user satisfaction.

In addition, since the radar sensor is disposed in the flow control device rotating in the left and right directions, there is an effect that the radar sensor can perform a user detection operation for a wide angular range.

In addition, the flow control device, which is positioned at a predetermined angle to the ground when driving, is provided with a radar sensor fixing part or a protruding fixing part for fixing the radar sensor to face in a horizontal direction or a direction parallel to the ground, The possibility of not being detected can be minimized.

In addition, the air purifier provides a notification to guide the user to move the position or change the direction of the air purifier when the confirmed user's position is out of the rotation angle of the flow control device, thereby providing an optimal installation position and You can also provide a guide for directions.

1 is a perspective view showing the appearance of an air purifier according to an embodiment of the present invention.
2 is a perspective view illustrating an internal configuration of an air purifier according to an embodiment of the present invention.
3 is a cross-sectional view taken along line III-III' of FIG. 2 .
4 is an exploded perspective view showing the configuration of an upper module according to an embodiment of the present invention.
5 is an exploded perspective view showing the configuration of a third air guide device and a second discharge guide device according to an embodiment of the present invention.
6 is an exploded perspective view illustrating a flow control device according to an embodiment of the present invention and a component to which the flow control device is coupled.
7 is a perspective view showing the configuration of a flow control device according to an embodiment of the present invention.
8 is a view showing a state in which the first guide mechanism acts for left and right rotation of the flow control device according to an embodiment of the present invention.
9 is an exploded perspective view showing the configuration of a flow control device according to an embodiment of the present invention.
10 is a view showing a state in which the second guide mechanism acts for vertical rotation of the flow control device according to an embodiment of the present invention.
11 is a view showing a state in which the flow control device according to the embodiment of the present invention is in the second position.
12 is a view showing the air flow through the air purifier when the flow control device according to the embodiment of the present invention is in the second position.
13 to 14 are views showing embodiments of the arrangement structure of the radar sensor provided in the flow control device.
15 is a block diagram showing a control configuration of an air purifier according to an embodiment of the present invention.
FIG. 16 is a more detailed block diagram of the radar sensor and control unit shown in FIG. 15 .
17 is a flowchart for explaining the operation of the air purifier according to an embodiment of the present invention.
18 is a flowchart for explaining the operation of the air purifier according to an embodiment of the present invention.
19 is a flowchart for explaining an additional embodiment related to the operation of the air purifier shown in FIG. 17 or 18 .

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is "connected", "coupled" or "connected" to another component, the component may be directly connected or connected to the other component, but another component is between each component. It will be understood that may also be "connected", "coupled" or "connected".

1 is a perspective view showing the appearance of an air purifier according to an embodiment of the present invention.

Referring to FIG. 1 , in the air purifier 10 according to the embodiment of the present invention, there are blowers 100 and 200 for generating air flow and flow control for switching the discharge direction of the air flow generated by the blowers 100 and 200 . A device 300 is included. 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 arranged 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 sucking indoor air existing on the lower side of the air purifier 10 , and the second air flow exists on the upper side of the air purifier 10 . Creates a flow that sucks in indoor air.

The first and second blowers 100 and 200 may be called "first air cleaning module 100" and second air cleaning module 200", respectively, in that they perform a function of purifying air in a clean space. In addition, the first blower 100 may be called a "lower air cleaning module" or "lower module" in that it is disposed under the air purifier 10, and the second blower ( 200) may be called an "upper air cleaning module" or "upper module" in that it is disposed on the upper portion of the air purifier 10 .

The air purifier 10 includes cases 101 and 201 that form an external appearance.

In detail, the cases 101 and 201 include a first case 101 that forms an exterior 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. That is, the first case 101 may have a conical shape with an end cut off.

The first case 101 includes a first separation unit 101a to which two parts constituting the first case 101 are coupled or separated. A locking device such as a locking protrusion or a magnet member may be provided in the first separating part 101a. The two parts may be detachably coupled to the first separating part 101a by the locking device.

In the first case 101, a first suction unit 102 through which air is sucked is formed. The first suction unit 102 includes a through hole through which at least a portion of the first case 101 is penetrated. A plurality of the first suction units 102 are formed.

The plurality of first suction units 102 are uniformly formed along the outer circumferential surface of the first case 101 in a circumferential direction so that air can be sucked in any direction with respect to the first case 101 . That is, air may be sucked 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 is configured in a cylindrical shape, and a plurality of the first suction units 102 are formed along the outer circumferential surface of the first case 101, an air intake amount can be increased.

Air sucked in through the first suction unit 102 may flow in an approximately radial direction from the outer circumferential surface of the first case 101 . define the direction 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 later, that is, the motor axis direction of the fan. And, the radial direction may be understood as a direction perpendicular to the axial direction. Incidentally, 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 to be spaced downward from the lower end of the first case 101 . In addition, in the space between the first case 101 and the base 20, a base suction part 103 is formed. Air sucked through the base suction part 103 may flow upward through the suction port 112 of the suction grill 110 (refer to FIG. 2 ) provided on the upper side of the base 20 .

That is, the first blower 100 includes a plurality of suction units 102 and 103 . Air existing in the lower part of the indoor space may be easily introduced into the first blower 100 through the plurality of suction units 102 and 103 . Accordingly, the intake amount of air can be increased.

A first discharge part 105 is formed at an upper portion of the first blower 100 . The first discharge unit 105 may be formed on the first discharge grill 195 of the first discharge guide device 190 (refer to FIG. 2 ) provided in the first blower 100 . The first discharge guide device 190 forms the outer appearance of the upper end of the first blower 100 . Air discharged through the first discharge unit 105 may flow upward in the axial direction.

The cases 101 and 201 include a second case 201 that forms the exterior 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. That is, 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 a second separating part 201a provided with a locking device. 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 referred to.

The diameter of the lower end of the second case 201 may be smaller than the diameter of the upper end 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.

The second case 201 is provided with a second suction unit 202 through which air is sucked. The second suction unit 202 includes a through hole through which at least a portion of the second case 201 is penetrated. A plurality of second suction units 202 are formed.

The plurality of second suction units 202 are uniformly formed along the outer circumferential surface of the second case 201 in the circumferential direction so that air can be sucked in any direction with respect to the second case 201 . That is, air may be sucked in a 360 degree direction based on a 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 suction units 202 are formed along the outer circumferential surface of the second case 201, the amount of air intake can be increased. And, as in the case of a conventional air purifier, by avoiding the shape of a hexahedron having corners, there is an effect that the flow resistance to the sucked air can be reduced. Air sucked in through the second suction part 202 may flow in a substantially radial direction from the outer peripheral surface of the second case 201 .

The air purifier 10 includes a partition device 400 provided between the first blower 100 and the second blower 200 . By the partition device 400 , the second blower 200 may be positioned to be spaced apart from the upper side of the first blower 100 .

The flow control 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 control device 300 . The air that has passed through the second blower 200 may pass through the air passage of the flow control device 300 and be discharged to the outside through the second discharge unit 305 . The second discharge part 305 is formed at the upper end of the flow control device 300 .

The flow control device 300 may be movably provided. In detail, the flow control device 300 may be in a lying state (first position), as shown in FIG. 1 , or in an inclined standing state (second position) as shown in FIG. 11 . have.

In addition, a display device 600 for displaying operation information of the air purifier 10 is provided at an upper portion of the flow control device 300 . The display device 600 may move together with the flow control device 300 .

In addition, the air purifier 10 according to an embodiment of the present invention may further include a radar sensor 720 for detecting a user existing in the vicinity of the air purifier 10 . The radar sensor 720 may be provided above the flow control device 300 . The radar sensor 720 may be implemented as an Ultra-WideBand (UWB) radar sensor.

The UWB radar sensor corresponds to a radar sensor that transmits and receives a signal using a wide frequency bandwidth (eg, 7500Mhz, etc.) with low power to measure the position of an object. The UWB radar sensor can detect even minute changes in movement, so it can be used to measure a person's breathing or heart rate.

In particular, the radar sensor 720 may be provided to effectively detect the position of the user or the distance to the user in the state that the flow control device 300 is erected at an angle (the second position). This will be described in more detail later with reference to FIGS. 11 to 14 .

2 is a perspective view showing the internal configuration of the air purifier according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along line III-III' of FIG. 2 .

2 and 3 , the first blower 100 according to an embodiment of the present invention includes a base 20 and a suction grill 110 disposed above the base 20 .

The base 20 includes a base body 21 placed on the ground and a base protrusion 22 protruding upward from the base body 21 to place the suction grill 110 . The base protrusion 22 may be provided on both sides of the base 20 .

By the base protrusion 22, the base body 21 and the suction grill 110 are spaced apart from each other. Between the base 20 and the suction grill 110, a base suction part 103 forming an air suction space is formed.

The suction grill 110 includes a substantially ring-shaped grill body 111 and a rim that protrudes upward from the outer peripheral surface of the grill body 111 . By the configuration of the grill body 111 and the rim portion, the suction grill 110 may have a stepped configuration.

The suction grill 110 includes a suction part 112 formed in the edge portion. The suction part 112 is configured to protrude upward along the circumference of the edge part, and may be configured to extend in a circumferential direction. In addition, a plurality of suction holes 112a are formed inside the suction unit 112 . The plurality of suction holes 112a may communicate with the base suction unit 103 .

Air sucked through the plurality of suction holes 112a and the base suction unit 103 may pass through the first fulter member 120 . The first filter member 120 is provided in a cylindrical shape and may have a filter surface for filtering air. The air passing through the plurality of suction holes 112a may pass through the outer circumferential surface of the first cylindrical filter member 120 and be introduced therein.

The first blower 100 further includes a first filter frame 130 forming a mounting space for the first filter member 120 . In detail, in the first filter frame 130 , 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 . ) is included. The first and second frames 131 and 132 may have a substantially ring shape.

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 . 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 .

The first filter member 120 may be detachably mounted in the mounting space. The first filter member 120 has a cylindrical shape, and air may be introduced through the outer peripheral surface of the first filter member 120 . In the process of passing through the first filter member 120 , impurities such as fine dust in the air may be filtered out. Since the first filter member 120 has a cylindrical shape, air can be introduced from any direction with respect to the first filter member 120 . Accordingly, the filtering area of the air can be increased.

The first blower 100 further includes a first fan housing 150 installed at the outlet side of the first filter member 120 . A housing space 152 in which the first fan 160 is accommodated is formed in the first fan housing 150 . In addition, the first fan housing 150 may be supported by the first filter frame 130 .

The first blower 100 further includes an ionizer for removing or sterilizing odor particles in the air. The ionizer may be coupled to the first fan housing 150 and act on air flowing inside the first fan housing 150 .

The sensor device 137 and the ionizer may also be installed in a second blower 200 to be described later. As another example, the sensor device 137 and the ionizer may be installed in one of the first blower 100 and the second blower 200 .

The first fan 160 includes a centrifugal fan that introduces air in an axial direction and discharges air upward in a radial direction.

In detail, in the first fan 160 , a hub 161 to which a rotation shaft 165a of a first fan motor 165 , which is a centrifugal fan motor, is coupled, and a shroud 162 spaced apart from the hub 161 . ) and a plurality of blades 163 disposed between the hub 161 and the shroud 162 are included. The first fan motor 165 may be coupled to an upper side of the first fan 160 .

The first blower 100 further includes a first air guide device 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 device 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 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 device 170 includes a guide rib 175 disposed in the first air passage. 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 serve to upwardly guide the air introduced into the first air passage of the first air guide device 170 through the first fan 160 .

The first air guide device 170 further includes a motor accommodating part 173 extending downward from the inner wall 172 to accommodate the first fan motor 165 . The motor accommodating part 173 may be inserted inside the hub 161 .

The first fan motor 165 may be supported on the upper side of the motor accommodating part 173 . In addition, the rotating shaft of the first fan motor 165 extends downward from the first fan motor 165 , passes through a bottom surface of the motor accommodating part 173 and is coupled to the shaft coupling part of the hub 161 . can be

In the first blower 100 , it is coupled to the upper side of the first air guide device 170 and guides the air passing through the first air guide device 170 to the first discharge guide device 190 . 2 The air guide device 180 is further included.

The second air guide device 180 has a first guide wall 181 having a substantially cylindrical shape, and a second guide wall 181 positioned inside the first guide wall 181 and having a substantially cylindrical shape ( 182) is included. The first guide wall 181 may be disposed to surround the second guide wall 182 .

A second air flow path 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 passage of the first air guide device 170 passes through the second air passage and flows upward. The second air flow path 185 may be referred to as a “discharge flow path”. In addition, the first discharge unit 105 is disposed above the second air flow path.

A first space in which at least a portion of the PCB device 500 is accommodated is formed inside the second guide wall 182 having a cylindrical shape.

In the first blower 100, the upper side of the second air guide device 180, that is, based on the air flow path, is disposed on the outlet side of the air flow passing through the second air guide device 180, A first discharge guide device 190 for guiding air discharge to the outside of the air purifier 10 is further included. A first discharge part 105 through which air is discharged is formed in the first discharge guide device 190 .

A partition device 400 is provided between the first blower 100 and the second blower 200 . The partition device 400 includes a partition plate 430 for separating or blocking the air flow generated from the first blower 100 and the air flow generated from the second blower 200 . . By the partition plate 430 , the first and second blowers 100 and 200 may be disposed to be vertically spaced apart from each other.

That is, a separation space in which the partition plate 430 is located is formed between the first and second blowers 100 and 200 . The first discharge guide device 190 of the first blower 100 is located at the lower end of the separation space, and the lever support device 560 of the second blower 200 is located at the upper end of the separation space. can be

The separation space may be divided into an upper space and a lower space by the partition plate 430 . The lower space is a space through which the air discharged from the first discharge unit 105 of the first discharge guide device 190 flows to the outside of the air purifier 10, and the upper space is It is understood as a holding space into which a hand can be put when moving the air purifier 10 . Air discharged from the first discharge unit 105 is guided by the partition plate 430 to flow to the outside of the air purifier 10, and can be prevented from flowing into the second blower 200 side. have.

4 is an exploded perspective view showing the configuration of an upper module according to an embodiment of the present invention.

Referring to FIG. 4 , in the second blower 200 according to the embodiment of the present invention, a lever support device 560 , a lever device 242 , a support device 240 , a second filter member 220 , and a second The second filter frame 230 , the second fan housing 250 and the second fan 260 are included.

The second filter member 220 may have a cylindrical shape with an open top. Air may be introduced into the second filter member 220 through the outer circumferential surface of the second filter member 220 , and may be discharged through the open top of the second filter member 220 . The configuration of the second filter member 220 may also be used in the first filter member 120 .

The lever support device 560 supports the lever device 242 . In detail, the lever support device 560 includes a lever support body 561 having an annular shape. The lever support body 561 blocks the air discharged through the first discharge unit 105 of the first blower 100 from flowing into the second blower 200, and the "blocking" It can also be called "boo".

The lever support device 560 further includes a movement guide 565 protruding upward from the lever support body 561 . A plurality of the movement guide parts 565 may be disposed to be spaced apart from each other in the circumferential direction of the lever support body 561 .

The lever device 242 may be provided so that a user's operation is possible. For example, the lever device 242 may be provided to be rotatable in the circumferential direction. In detail, the lever device 242 includes a lever body 243 having a substantially ring shape and being rotatably provided. In addition, a plurality of cutouts 245 disposed at positions corresponding to the plurality of movement guide portions 565 are formed in the lever body 243 .

The lever device 142 is supported on the upper surface of the lever support body 561 . When the lever device 242 is supported by the lever support body 561 , the plurality of movement guides 565 may be disposed to be inserted into the plurality of cutouts 245 . In detail, the plurality of movement guides 565 may pass through the plurality of cutouts 245 and protrude upwards of the plurality of cutouts 245 .

A support device 240 for supporting the second filter member 220 is provided above the lever device 242 . In detail, the lever device 242 supports the lower surface of the support device 240 . The support device 240 may include a support protrusion (not shown) in contact with the movement guide part 565 . The support protrusion protrudes downward from the lower surface of the support device 240 , and may be provided at a position corresponding to the movement guide part 565 . In addition, the shape of the support protrusion corresponds to the shape of the movement guide 565 and includes an inclined surface that is formed to gradually protrude in the circumferential direction. In addition, the direction in which the movement guide part 565 is formed to gradually protrude and the direction in which the support protrusion is formed to gradually protrude may be opposite to each other.

The lever device 242 and the support device 240 may be rotated together. During this rotation, the movement guide 565 and the support protrusion may interfere. In detail, when the lower portion of the support protrusion and the upper portion of the movement guide 565 contact each other, the lever device 242 and the support device 240 are lifted upward. And, the first filter member 220 supported by the support device 240 is in a state coupled to the first blower 200 while moving upward.

On the other hand, when the upper part of the support protrusion and the lower part of the movement guide part 565 come into contact with each other or the interference between the support protrusion part and the movement guide part 565 is released, the lever device 242 and the support device 240 . is coming down In addition, the first filter member 220 supported by the support device 240 is in a detachable state (released state) from the first blower 100 .

The second blower 200 further includes a second filter frame 230 forming a mounting space for the second filter member 220 . In detail, in the second filter frame 230 , a first frame 231 forming a lower portion of the first filter frame 230 and a second frame forming an upper portion of the second filter frame 230 ( 232 ) and a second filter support 235 extending upward from the first frame 231 toward the second frame 232 . The description of the first and second frames 231,232 and the second filter support 235 is the same as the description of the first and second frames 131 and 132 and the first filter support 135 of the first filter frame 130 . wish to

A mounting space for the second filter member 220 is defined by the first and second frames 231,232 and the plurality of second filter support parts 235 . In addition, the first support part cover 236 may be coupled to the outside of the second filter support part 235 .

A sensor device 237 may be installed in the second filter frame 230 . The sensor device 237 may include a dust sensor 237a for detecting an amount of dust in the air and a gas sensor 237b for detecting an amount of gas in the air. The dust sensor 237a and the gas sensor 237b may be disposed to be supported by the second frame 232 of the second filter frame 230 . The sensor device 237 further includes a sensor cover 237c covering the dust sensor 237a and the gas sensor 237b.

In this embodiment, it has been described that the sensor device 237 is installed in the second blower 200 , but otherwise, the sensor device 237 may be installed in the first blower 100 . . That is, the sensor device 237 may be installed in the first blower 100 or the second blower 200 .

The second filter member 220 may be detachably mounted in the mounting space. The first filter member 220 has a cylindrical shape, and air may be introduced through the outer peripheral surface of the second filter member 220 . In the process of passing through the second filter member 220 , impurities such as fine dust in the air may be filtered out.

The second blower 200 further includes a second fan housing 250 installed at the outlet side of the second filter member 220 . In the second fan housing 250 , a housing space 252 in which the second fan 260 is accommodated is formed. Since the configuration of the second fan housing 250 and the second fan 260 is the same as that of the first fan housing 150 and the first fan 160, the configuration of the second fan housing 250 and the second fan 260 is the same. The description of the second fan 260 refers to the description of the first fan housing 150 and the first fan 160 .

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 first fan housing 250 , and may act on air flowing inside the second fan housing 250 . The ionizer 258 may have the same configuration as the ionizer of the first blower 100 .

5 is an exploded perspective view showing the configuration of a third air guide device and a second discharge guide device according to an embodiment of the present invention, and FIG. 6 is a flow control device according to an embodiment of the present invention and the flow control device are coupled It is an exploded perspective view showing the configuration of the parts, FIG. 7 is a perspective view showing the configuration of the flow control device according to an embodiment of the present invention, and FIG. It is a drawing showing how the guide mechanism works.

5 to 8 , in the second blower 220 according to the embodiment of the present invention, the flow of air coupled to the upper side of the second fan 260 and passed through the second fan 260 . A third air guide device 270 for guiding the is further included.

The third air guide device 270 has an outer wall 271 that forms an outer circumferential surface of the third air guide device 270 and is located inside the outer wall 271 of the third air guide device 270 . An inner wall 272 defining an inner circumferential surface is included. A first air flow path 272a 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 passage 272a. 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 accommodating part 273 extending downward from the inner wall 272 to accommodate the second fan motor 265 . The motor accommodating 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 . A motor coupling part 266 is provided on one side of the second fan motor 265 , and the motor coupling part 266 connects the second fan motor 265 to the third air guide device 270 . guide it to be fixed.

The third air guide device 270 includes guide devices 276 and 277 for guiding the movement of the flow control device 300 . The guide devices 276 and 277 include a first rack 276 and a shaft guide groove 277 provided in the motor accommodating part 273 .

The first rack 276 is understood as a configuration for guiding the left-right rotation of the flow control device 300 in association with the first gear 360 of the flow control device 300 . The first rack 276 is provided on the inner circumferential surface of the motor accommodating part 273, and may extend in the circumferential direction according to a set curvature. In addition, the length of the first rack 276 may be formed to a length set based on a distance interlocked with the first gear 360 .

The flow control device 300 may be rotated in the left and right directions. Here, "rotation in the left and right direction" may mean rotation in a clockwise or counterclockwise direction based on the vertical direction. In this process, the first gear 360 may rotate with a predetermined rotation radius around the rotation shaft 354 of the flow control device 300 .

The shaft guide groove 277 is a groove for guiding the rotation of the first gear 360 and is understood as a configuration that extends roundly with a predetermined curvature. For example, the shaft guide groove 277 may be formed to be rounded in the circumferential direction. That is, the shaft guide groove 277 may have a circular arc shape.

A first gear shaft 362 of the first gear 360 may be inserted into the shaft guide groove 277 . While the first gear 360 rotates, the first gear shaft 362 may move along the shaft guide groove 277 .

The second blower 200 has a second discharge guide device 280 that is installed above the third air guide device 270 and guides the flow of air passing through the third air guide device 270 . ) is provided.

The second discharge guide device 280 may have a substantially annular shape. In detail, in the second discharge guide device 280, the outer circumferential surface of the second discharge guide device 280 is formed and the discharge outer wall 281 having a cylindrical shape and the discharge outer wall 281 are located inside the The discharge inner wall 282 forming the inner circumferential surface of the second discharge guide device 280 and having a cylindrical shape is included.

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 second air flow path 282a through which air flows through the third air guide device 270 through which air flows. , that is, a discharge passage is formed. The discharge flow path may be located above the first air flow path 272a provided with the guide rib 275 .

The second discharge guide device 280 further includes a second discharge grill 288 disposed in the discharge passage 282a. 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 . The second discharge grill 288 may prevent the user from inserting a finger into the lower side of the discharge passage 282a.

The second discharge guide device 280 further includes a rotation guide plate 283 coupled to the discharge inner wall 282 . The rotation guide plate 283 may extend from an inner circumferential surface of the discharge inner wall 282 toward an inner center of the second discharge guide device 280 .

The rotation guide plate 283 includes a shaft insertion portion 284 that provides a center of rotation in the left and right directions of the flow control device 300 . The rotation shaft 354 may be inserted into the shaft insertion part 284 . The shaft insertion part 284 may be located at an inner center of the second discharge guide device 280 . The rotation guide plate 283 may be understood as a support plate for supporting the shaft insertion part 284 .

The rotation guide plate 283 further includes a bearing groove 285 . A first bearing 353 provided in the flow control device 300 may be inserted into the bearing groove 285 . The bearing groove 285 is understood as a configuration extending roundly with a curvature set as a groove for guiding the movement of the first bearing 353 . For example, the bearing groove 285 may be formed to be rounded in a circumferential direction. That is, the bearing groove 285 may have a circular arc shape.

In the process of rotating the flow control device 300 in the left and right directions, the first bearing 353 is inserted into the bearing groove 285 to move, and accordingly, generated during the rotation of the flow control device 300 . friction can be reduced.

The flow control device 300 includes a third fan housing 310 in which the third fan 330 is accommodated. The third fan housing 310 has a substantially annular shape. For convenience of description, the first fan 160 and the second fan 260 may be referred to as a “blowing fan” and the third fan 330 may be referred to as a “circulation fan”.

On the upper side of the third fan housing 310 , a discharge grill 315 forming a second discharge unit 305 through which air passing through the third fan 330 is discharged is provided. Since the air purifier 10 is provided with the second discharge unit 305 together with the first discharge unit 105 of the first blower 100, the discharge air volume is improved and air is discharged in various directions. effect appears. In addition, the display device 600 may be provided in a central portion of the discharge grill 315 .

The third fan 330 may include an axial fan. In detail, the third fan 330 may be operated to discharge the air introduced in the axial direction in the axial direction. That is, the air flowing upward toward the third fan 330 through the second fan 260 , the third air guide device 270 , and the second discharge guide device 280 is the third It may be discharged from the fan 330 and discharged to the outside through the second discharge unit 305 positioned above the third fan 330 .

In the third fan 330 , a hub 331 having a shaft coupling portion to which a rotation shaft of a third fan motor 335 , which is an axial fan motor, is coupled, and a plurality of blades 333 circumferentially coupled to the hub 331 . ) is included. The third fan motor 335 may be coupled to a lower side of the third fan 330 .

The first fan motor 165 and the second fan motor 265 may be arranged in a line with respect to the longitudinal direction of the air purifier 10 . In addition, the second fan motor 265 and the third fan motor 335 may be arranged in a line with respect to the longitudinal direction of the air purifier 10 .

In the flow control device 300 , a flow guide part coupled to the lower side of the third fan housing 310 to guide the air passing through the second discharge guide device 280 to the third fan housing 310 ( 320) is further included. The flow guide part 320 includes an inlet grill 325 for guiding the inflow of air into the third fan housing 310 . The inlet grill 325 may have a downwardly concave shape.

In addition, the shape of the second discharge grill 288 of the second discharge guide device 280 is formed to be concave downward corresponding to the shape of the inlet grill 325 . The inlet grill 325 may be seated on an upper side of the second outlet grill 288 . With this configuration, the inlet grill 325 can be stably supported by the second outlet grill 288 .

The flow control device 300 includes a rotation guide device 350 installed below the flow guide part 320 to guide the left and right rotation and the vertical rotation of the flow control device 300 . more included. The rotation in the left and right direction may mean rotation in a clockwise or counterclockwise direction based on the axial direction. The horizontal rotation may be referred to as a “first direction rotation” and the vertical rotation may be referred to as a “second direction rotation”.

The rotation guide device 350 includes a first guide mechanism for guiding the rotation of the flow control device 300 in the first direction and a second guide mechanism for guiding the rotation of the flow control device 300 in the second direction. is included

In detail, the first guide mechanism includes a first gear motor 363 that generates a driving force and a first gear 360 that is coupled to the first gear motor 363 to be rotated. For example, the first gear motor 363 may include a step motor that facilitates control of the rotation angle. In addition, the first gear motor 363 may include a motor capable of bidirectional rotation.

The first guide mechanism includes a first gear shaft 362 extending downward from the first gear 360 , that is, toward the third air guide device 270 or the second discharge guide device 280 . more included.

The first gear 360 is gear-coupled to the first rack 276 of the third air guide device 270 . A plurality of gear teeth are formed in the first gear 360 and the first rack 276 . And, when the first gear motor 363 is driven, the first gear 360 rotates and interlocks with the first rack 276 . At this time, since the third air guide device 270 has a fixed configuration, the first gear 360 may be moved along the first rack 276 .

The shaft guide groove 277 of the third air guide device 270 may guide the movement of the first gear 360 . In detail, the first gear shaft 362 may be inserted into the shaft guide groove 277 . In addition, the first gear shaft 362 may be moved in the circumferential direction along the shaft guide groove 277 while the first gear 360 rotates.

The first guide mechanism further includes a rotation shaft 354 constituting a rotation center of the flow control device 300 . The first gear 360 and the first gear shaft 362 may be rotated with a rotation radius set around the rotation shaft 354 . At this time, the set turning radius is called a "first turning radius".

The rotation shaft 354 is provided on the bottom surface of the rotation guide device 350 and is inserted into the shaft insertion part 284 of the second discharge guide device 280, and can be rotated within the shaft insertion part 284. have. That is, when the first gear 360 rotates, the first gear shaft 362 and the first gear 360 rotate in the circumferential direction about the rotation shaft 354 . In addition, the rotation shaft 354 rotates within the shaft insertion part 284 . Accordingly, the flow control device 300 may be rotated in the first direction, ie, clockwise or counterclockwise, with the longitudinal direction as the axial direction.

The first guide mechanism further includes bearings 353 and 355 for facilitating rotation of the flow control device 300 in the first direction. The bearings 353 and 355 may reduce frictional force generated during the rotation of the flow control device 300 .

The bearings 353 and 355 include a first bearing 353 provided on a bottom surface of the rotation guide device 350 . For example, the first bearing 353 may include a ball bearing.

The rotation guide plate 283 includes a bearing groove 285 into which the first bearing 353 is inserted. While the flow control device 300 rotates in the first direction, the first bearing 353 may be inserted into the bearing groove 285 to move.

In this case, the first bearing 353 may be rotated with a rotation radius set around the rotation shaft 354 . At this time, the set turning radius is referred to as a "second turning radius". The second turning radius may be smaller than the first turning radius.

The bearings 353 and 355 further include the second bearing 355 . The second bearing 355 may be rotatably installed on the edge of the rotation guide device 350 . The second bearing 355 may be provided to be in contact with the discharge inner wall 282 of the second discharge guide device 280 , that is, the inner circumferential surface of the discharge inner wall 282 is the second bearing 355 . ) can form a contact surface. As the second bearing 355 rotates along the inner circumferential surface of the discharge inner wall 282 about the rotation shaft 354 , rotation of the flow control device 300 in the first direction can be easily achieved.

Referring to FIG. 8 , the rotation of the flow control device 300 in the first direction will be briefly described. When the first gear motor 363 operates, the first gear 360 may rotate. When viewed from above, the first gearmotor 363 rotates in a clockwise or counterclockwise direction, and correspondingly, the first gear 360 rotates in the clockwise or counterclockwise direction.

For example, when the first gear motor 363 rotates clockwise, the first gear 360 and the first gear shaft 362 may move counterclockwise along the shaft guide groove 277 . . On the other hand, when the first gear motor 363 rotates counterclockwise, the first gear 360 and the first gear shaft 362 may move clockwise along the shaft guide groove 277 . .

According to the movement of the first gear 360 in the clockwise or counterclockwise direction, the flow control device 300 may rotate in the same direction as the movement direction of the first gear 360 . In this process, the first bearing 353 may move along the bearing groove 285 , and the second bearing 355 may move along the inner circumferential surface of the discharge inner wall 282 . By this action, the flow control device 300 can be stably rotated along a set path in the left and right directions.

9 is an exploded perspective view showing the configuration of a flow control device according to an embodiment of the present invention, and FIG. 10 is an exploded perspective view showing the action of the second guide mechanism for vertical rotation of the flow control device according to an embodiment of the present invention It is a drawing.

7 and 9 , the flow control device 300 according to the embodiment of the present invention includes a second guide mechanism for guiding the vertical rotation of the flow control device 300 . In detail, the second guide mechanism includes a fixed guide member 352 fixed to the guide body 351 . The central shaft 354 may be provided on a lower surface of the fixing guide member 352 .

The fixed guide member 352 includes a first guide surface 352a that supports the lower side of the rotation guide member 370 and guides the rotation of the rotation guide member 370 in the second direction. The first guide surface 352a forms at least a portion of an upper surface of the fixed guide member 352 , and may extend upward in a round manner in response to a rotation path of the rotation guide member 370 .

The fixed guide member 352 includes a first guide bearing 359 that is provided to be in contact with the rotation guide member 370 and can reduce frictional force generated during the rotational movement of the rotation guide member 370 . more included. The first guide bearing 359 may be positioned on the side of the first guide surface 352a.

The fixed guide member 352 further includes a second gear insertion part 352b into which a second gear 365 can be inserted for rotation of the rotation guide member 370 . The second gear insertion part 352b is formed on one side of the first guide surface 352a. For example, the second gear insertion part 352b may be formed by cutting at least a portion of the first guide surface 352a.

The second gear 365 is positioned below the first guide surface 352a, and at least a portion of the second gear 365 penetrates the second gear insertion part 352b to insert the second gear. It may be configured to protrude upward of the portion 352b.

The second guide mechanism further includes a second gear motor 367 coupled to the second gear 365 to provide a driving force. For example, the second gear motor 367 may include a step motor. In addition, the second gear motor 367 may include a motor capable of bidirectional rotation.

The second guide mechanism further includes a second gear shaft 366 extending from the second gear motor 367 to the second gear 365 . The second gear shaft 366 may protrude laterally of the second gear motor 367 . When the second gear motor 367 is driven, the second gear shaft 366 and the second gear 365 may rotate together.

The second guide mechanism further includes a rotation guide member 370 disposed above the fixed guide member 352 and rotatably provided in the vertical direction. The rotation guide member 370 may be coupled to a lower side of the flow guide part 320 .

In detail, the rotation guide member 370 includes a body portion 371 supported by the fixed guide member 352 . In addition, the body portion 371 includes a second guide surface 372 that moves along the first guide surface 352a. The second guide surface 372 may be formed to be rounded downward corresponding to the curvature of the first guide surface 352a.

The rotation guide member 370 has a second guide bearing 375 which is provided to be in contact with the fixed guide member 352 to reduce frictional force generated during the rotational movement of the rotation guide member 370 . more included. The second guide bearing 375 is positioned on the side of the second guide surface 372 , and may move along the first guide surface 352a while the rotation guide member 370 rotates.

The rotation guide member 370 further includes a second rack 374 interlocking with the second gear 365 . A plurality of gear teeth are formed in the second gear 365 and the second rack 374, and through the plurality of gear teeth, the second gear 365 and the second rack 374 are gear-coupled to each other. can

When the second gear motor 367 is driven, by interlocking the second gear 365 and the second rack 374, the rotation guide member 370 can perform a vertical rotation movement. have. Accordingly, the flow control device 300 may perform rotation in the second direction according to the movement of the rotation guide member 370 .

Referring to FIG. 10 , the second direction rotation of the flow control device 300 will be briefly described. When the second gear motor 367 operates, the second gear 365 may rotate. The second gear motor 367 rotates in a clockwise or counterclockwise direction based on the radial direction, and the second gear 365 may rotate in the clockwise or counterclockwise direction in response thereto.

For example, when the second gearmotor 367 rotates in the clockwise direction, the second gear 365 rotates in the clockwise direction and the second rack 374 is interlocked with the second gear 365 to rotate halfway. It can be rotated clockwise. As the second rack 374 rotates, the rotation guide member 370 and the flow guide part 320 may rotate together. As a result, the fan housing 310 may rotate counterclockwise.

On the other hand, when the second gearmotor 367 rotates counterclockwise, the second gear 365 rotates counterclockwise and the second rack 374 is interlocked with the second gear 365 . to rotate clockwise. As the second rack 374 rotates, the rotation guide member 370 and the flow guide part 320 may rotate together. As a result, the fan housing 310 may rotate in a clockwise direction. By this action, the flow control device 300 can be stably rotated along a set path in the vertical direction.

11 is a view showing a state in which the flow control device according to an embodiment of the present invention is in the second position, and FIG. 12 is a view showing that the flow control device according to the embodiment of the present invention is in the second position. A diagram showing the air flow.

11 to 12 show a state in which the flow control device 300 protrudes upwardly of the second discharge guide device 280, that is, the rotation guide member 370 rotates upward so that the fan housing 310 is It shows the state of being erected upward (second position).

The flow control device 300 may be rotatably up and down in the direction of “B” shown in FIG. 11 , and may be in the first position (see FIG. 1 ) or the second position. When the flow control device 300 is in the second position, the inlet grill 325 may be upwardly spaced apart from the upper surface of the second outlet grill 288 .

In a state in which the flow control device 300 is in the second position, the first and second fans 160 and 260 may rotate to generate the first and second flows. And, the third fan 330 may operate. The second position is understood to be a position inclined upward by a set angle with respect to the first position of the flow control device 300 . For example, the set angle may be about 60 degrees.

In detail, referring to FIG. 13 , by the operation of the third fan 330 , at least a portion of the air discharged through the second discharge guide device 280 is transferred to the inside of the third fan housing 310 . It may be introduced into the air, and may be discharged from the second discharge unit 305 through the third fan 330 . By this action, the purified air can reach a location far away from the air purifier 10 .

In addition, the flow control device 300 may be rotated in the left and right directions with respect to the axial direction in the second position. FIG. 11 shows a state in which the flow control device 300 is positioned to face one direction (left direction based on FIG. 11 ) in the second position. Here, the one direction may be a direction toward the left 45 degrees centering on the front of the air purifier (10).

The flow control device 300 may be positioned to face the other direction in the second position. Here, the other direction may be a direction toward the right 45 degrees centering on the front of the air purifier (10). That is, the rotation angle of the flow control device 300 may form about 90 degrees.

In this way, since the flow control device 300 can be rotated in the left and right directions based on the axial direction, there is an effect that the discharge air flow can be sent to a long distance in various directions centering on the air purifier 10 .

13 to 14 are views showing embodiments of the arrangement structure of the radar sensor provided in the flow control device.

As described above in FIG. 1 , the air purifier 10 according to an embodiment of the present invention may include a radar sensor 720 for detecting a user existing around the air purifier 10 .

The radar sensor 720 may transmit an electromagnetic wave within a range within a predetermined angle, and receive a reflected signal in which the transmitted electromagnetic wave collides with an object existing around the air purifier 10 and returns. When the detection range of the radar sensor 720 is limited within a predetermined angle, the air purifier 10 is provided in an angular range wider than the predetermined angle by disposing the radar sensor 720 in the rotating flow control device 300 . user can be detected.

In addition, in consideration of the height from the ground (eg, about 1 m) of the flow regulator 300 and users having various heights, the radar sensor 720 may have a horizontal direction (eg, a direction parallel to the ground). It may be disposed in the flow control device 300 to emit an electromagnetic wave signal toward the.

Hereinafter, an arrangement structure of the radar sensor 720 according to embodiments of the present invention will be described with reference to FIGS. 13 to 14 . 13 to 14 , in the state where the flow control device 300 is in the second position, it is assumed that the angle R1 between the flow control device 300 and the ground is 60 degrees.

Referring to FIG. 13 , the flow control device 300 is recessed from the upper surface to the inside, and the radar sensor 720 is moved in a horizontal direction (eg, parallel to the ground) in a state where the flow control device 300 is in the second position. direction) may include a space for receiving the radar sensor to face. The radar sensor fixing part 720A to which the radar sensor 720 is fixed may be formed in the radar sensor accommodation space.

The radar sensor fixing unit 720A may be inclined to form a predetermined angle with the upper surface of the flow control device 300 . When the flow control device 300 is in the second position, the angle R2 between the radar sensor fixing unit 720A and the ground may correspond to a right angle or an angle close to 90 degrees. For example, when the angle R1 between the flow control device 300 and the ground when the flow control device 300 is in the second position is 60 degrees, when the flow control device 300 is in the first position, the radar The angle between the sensor fixing part 720A and the ground may correspond to 30 degrees. Accordingly, the radar sensor 720 fixed to the radar sensor fixing unit 720A may emit an electromagnetic wave signal in a horizontal direction (eg, a direction parallel to the ground).

According to an embodiment, the flow control device 300 may further include a protector 721 that is formed to be connected to the upper surface of the flow control device 300 and blocks and protects the radar sensor 720 from the outside. The protector 721 may prevent the deterioration of the performance of the radar sensor 720 due to the accumulation of dust or foreign substances in the space for receiving the radar sensor. The protector 721 may be implemented with a material that can smoothly pass the electromagnetic wave signal emitted from the radar sensor 720 . Alternatively, a microscopic opening is formed in a part of the protector 721 , and an electromagnetic wave signal emitted from the radar sensor 720 may be transmitted to the outside through the opening.

Referring to FIG. 14 , the flow control device 300 is formed to protrude from the upper surface, and the radar sensor 720 is moved in a horizontal direction (eg, in a direction parallel to the ground) in a state where the flow control device 300 is in the second position. It may include a protrusion fixing part 720B for fixing to face.

The protrusion fixing part 720B may be inclined to form a predetermined angle with the upper surface of the flow control device 300 . When the flow control device 300 is in the second position, the angle R2 between the contact surface of the radar sensor 720 of the protrusion fixing unit 720B and the ground corresponds to a right angle or an angle close to 90 degrees. can For example, if the angle R1 between the flow control device 300 and the ground when the flow control device 300 is in the second position is 60 degrees, the flow control device 300 protrudes when the flow control device 300 is in the first position The angle between the contact surface of the radar sensor 720 of the fixing unit 720B and the ground may correspond to 30 degrees. Accordingly, the radar sensor 720 fixed to the protrusion fixing unit 720B may emit an electromagnetic wave signal in a horizontal direction (eg, a direction parallel to the ground).

In the case of the embodiment shown in Fig. 14, since the radar sensor 720 is provided to protrude to the outside, it is possible not only to more smoothly emit electromagnetic wave signals, but also to more easily receive the reflected signal returning from the object, so that the user The detection accuracy of the position may be improved.

15 is a block diagram showing a control configuration of an air purifier according to an embodiment of the present invention.

Referring to FIG. 15 , the air purifier 10 may include a sensor device 237 . For example, the sensor device 237 may include a dust sensor 237a (refer to FIG. 4 ). The dust sensor 237a may detect an amount of impurities or dust of a predetermined size or less in the air sucked into the upper module 200 . For example, the dust sensor 237a may be configured to detect an amount of ultrafine dust of 2.5 μm or less. Accordingly, the dust sensor 237a may be referred to as a “PM 2.5 dust sensor”.

The sensor device 237 may further include a gas sensor 237b (refer to FIG. 4 ). The gas sensor 237b may detect an amount of a harmful gas, for example, a combustible gas, a reducing gas, an organic solvent gas, etc. contained in the air sucked into the upper module 200 .

Based on the information sensed by the dust sensor 237a and the gas sensor 237b, the air condition, that is, the air quality level may be determined. In detail, the air quality level may be determined by combining the values output from the dust sensor 237a and the gas sensor 237b. The display apparatus 600 displays the determined information on the air quality level in the form of a color or text, so that the user can intuitively recognize the information on the air quality.

The air purifier 10 may further include an input unit 710 through which a user may input a predetermined command. The input unit 710 may include a power input unit 711 for turning on or off the power of the air purifier 10 .

In addition, the input unit 710 may further include an operation mode input unit 713 capable of inputting a command regarding the operation mode of the air purifier 10 while the power of the air purifier 10 is turned on.

The operation mode of the air purifier 10 may include a manual operation mode, an automatic operation mode, a sub-module intensive operation mode, and a user tracking operation mode. The user may select any one driving mode through the driving mode input unit 713 . For example, the operation mode input unit 713 may include a separate input unit for selecting each operation mode.

When the manual operation mode is selected through the operation mode input unit 713 , the user may input the number of modules (devices) to be operated or the wind strength (air volume). In detail, the input unit 710 may further include a clean mode input unit 715 for determining the number of modules to be operated. The module may include three modules, that is, the first air cleaning module 100 , the second air cleaning module 200 , and the flow control device 300 . The three modules can be operated selectively or independently.

The clean mode input unit 715 is configured to determine the number of modules to be operated among the three modules. In detail, the clean mode input unit 715 may include "single clean input unit", "dual clean input unit", and "circulation clean input unit". The single clean input unit is an input unit that can be input to operate the first air cleaning module 100 among the three modules, and the dual clean input unit operates the first and second air cleaning modules 100 and 200 It is understood as an input unit that can be input for In addition, the circulation cleaning input unit is understood as an input unit that can be input to operate the first and second air cleaning modules 100 and 200 and the flow control device 300 .

When the single clean input unit is input, the air purifier 10 operates in "single mode" in which the independent operation of the lower module 100 is performed, and when the dual clean input unit is input, the air purifier 10 operates the upper and lower modules ( 100, 200) may be operated in a "dual mode" in which the combined operation is performed. And, when the circulation cleaning input unit is input, the air purifier 10 may be operated in a "circulation mode" in which the combination operation of the upper and lower modules 100 and 200 and the flow control device 300 is performed.

The input unit 710 further includes an air volume input unit 717 capable of determining the strength of the air discharged from the module to be operated, that is, the air volume. After determining the module to be operated through the clean mode input unit 715 , the user may determine the air volume discharged from the module through the air volume input unit 717 . As an example, the wind volume may be divided into “weak wind”, “medium wind” and “strong wind”. Of course, the number of rotations of the first fan 160 , the second fan 260 , or the third fan 330 may be determined according to the determined air volume.

On the other hand, when the automatic operation mode is selected through the operation mode input unit 713 , the air purifier 10 determines the number of modules to be operated and the wind strength based on the air pollution level recognized by the sensor device 237 . (Air volume) can be determined. In this case, the display device 600 may display information about the driven module and the wind strength.

On the other hand, when the lower module intensive operation mode is selected through the operation mode input unit 713 , the air volume of the first air cleaning module 100 is determined based on the air pollution level recognized by the sensor device 237 , , the operation of the first air cleaning module 100 may be performed according to the determined air volume. When the sub-module intensive operation mode is selected, a lower area of a clean space having a relatively high degree of pollution can be first cleaned while consuming relatively low power. In particular, when an infant or infant with a weak respiratory function exists in a lower area of a clean space, the effect of the lower module intensive operation mode may be more pronounced. The sub-module intensive operation mode may be called a baby care mode.

As the pollution level detected by the sensor device 237 increases, the amount of air discharged from the first air cleaning module 100 may be determined to increase.

According to this method, depending on whether the user selects the automatic operation mode or the sub-module intensive operation mode, the number (type) or air volume of the operated modules may be differently controlled even at the same air pollution level.

Meanwhile, the air purifier 10 according to an embodiment of the present invention may further include a user tracking operation mode. When the user tracking driving mode is selected, the controller 700 may control the radar sensor 720 to detect the user's location.

The controller 700 may adjust a wind direction or an air volume based on the sensed user's location. For example, the control unit 700 may rotate the flow control device 300 to face the user's position, so that the clean air is quickly delivered to the user.

Also, the controller 700 may adjust the air volume based on the distance between the air purifier 10 and the user. For example, the controller 700 may control the third fan motor 335 to increase the air volume as the distance between the air purifier 10 and the user increases. A user detection operation of the controller 700 and the radar sensor 720 will be described in more detail later with reference to FIG. 16 .

The air purifier 10 further includes a memory unit 730 for storing information preset for operation of the air purifier 10 . The memory unit 730 may store the value sensed by the sensor device 237 , mapping information about an air quality level, mapping information about a pollution level, and mapping information about a display color or text. In addition, when the automatic operation mode or the sub-module intensive operation mode is selected in the memory unit 730 , information about the number of modules to be operated and information about the air volume may be stored.

The air purifier 10 includes a first fan motor 165 based on information detected by the sensor device 237 , information input through the input unit 710 , or information stored in the memory unit 730 . , the second fan motor 265 , the third fan motor 335 , the first gear motor 363 , the second gear motor 367 , or the control unit 700 for controlling the driving of the display device 600 is further Included. The control unit 700 may determine whether to operate the three modules according to the operation mode of the air purifier 10 , and may determine the air volume of the three modules according to input or pre-stored information.

FIG. 16 is a more detailed block diagram of the radar sensor and control unit shown in FIG. 15 .

Referring to FIG. 16 , the radar sensor 720 may include a signal transmitter 722 for transmitting electromagnetic waves to the outside, and a signal receiver 724 for receiving a reflected signal from which the transmitted electromagnetic waves are reflected back by an object. .

For example, the signal transmitter 722 may transmit electromagnetic waves to the outside under the control of the controller 700 . As described above, when the radar sensor 720 is implemented as a UWB radar sensor, the signal transmitter 722 may transmit an electromagnetic wave having a wide frequency band (eg, 7500Mhz) to the outside.

When the signal receiving unit 724 receives the reflected signal, the signal filter 702 may remove the clutter signal from the received reflected signal. The clutter signal may mean a signal reflected from a fixed object, that is, a signal reflected from objects other than the user. For example, the signal filter 702 may remove the clutter signal by applying various known clutter removal techniques. According to an embodiment, the signal filter 702 may remove the clutter signal by using a signal pattern corresponding to the case in which the user does not exist. A signal pattern corresponding to the case in which the user does not exist may be stored in the memory unit 730 .

The controller 700 may detect the presence of a user based on the reflected signal from which the clutter signal is removed by the signal filter 702 . For example, when the user does not exist, the reflected signal from which the clutter signal is removed may have almost no signal component.

The signal comparator 704 compares the previous reflected signal previously received through the signal receiving unit 724 with the current reflected signal currently received through the signal receiving unit 724 (the reflected signal from which the clutter signal is removed), A change such as whether the user moves or not can be detected. For example, when the similarity between the previous reflected signal and the current reflected signal is higher than a reference similarity, the controller 700 may detect that the user has not moved. On the other hand, when the similarity between the previous reflected signal and the current reflected signal is less than or equal to the reference similarity, the controller 700 may detect that the user is moving.

According to an embodiment, the controller 700 may obtain heart rate information of the user from the reflected signal, and identify the corresponding user using the unique heart rate information for each user.

The signal filter 702 and the signal comparator 704 may correspond to components included in the control unit 700, but may be implemented as separate components (eg, separate circuits) according to embodiments. In addition, the signal filter 702 and the signal comparator 704 are components operated by software by the control unit 700 and may be a kind of algorithm stored in the memory unit 730 .

In FIGS. 15 and 16 , one radar sensor 720 is disposed in the air purifier 10 , but according to an embodiment, the radar sensor 720 may include a plurality of radar sensors. For example, when the radar sensor 720 is implemented as a first radar sensor and a second radar sensor, the first radar sensor detects a user present in a predetermined angular range from the direction in which the flow control device 300 looks to the left. In addition, the second radar sensor may detect a user present in a predetermined angle range to the right from the direction in which the flow control device 300 is looking.

Hereinafter, embodiments of the operation of the air purifier 10 will be described with reference to FIGS. 17 to 19 .

17 is a flowchart for explaining the operation of the air purifier according to an embodiment of the present invention.

Referring to FIG. 17 , after the air purifier 10 is powered on ( S10 ), the air purifier 10 may output an electromagnetic wave signal for detecting a user through the radar sensor 720 ( S11 ).

As described above in FIG. 15 , as the user operates the power input unit 711 , the power of the air purifier 10 may be turned on. After the power of the air purifier 10 is turned on, the user may set the operation mode of the air purifier 10 as the user tracking operation mode through the operation mode input unit 713 .

When the operation mode of the air purifier 10 is set to the user tracking operation mode, the controller 700 controls the radar sensor 720 disposed in the flow control device 300 to exist within a predetermined distance from the air purifier 10 . It is possible to output a signal in the form of an electromagnetic wave for detecting the user.

According to an embodiment, the controller 700 may control the radar sensor 720 to periodically or continuously output the signal while rotating the flow control device 300 for user detection in a wide angular range. In this case, the range of the angle at which the air purifier 10 can detect the user may correspond to the sum of the intrinsic detection angle of the radar sensor 720 and the rotation angle of the flow control device 300 . For example, the intrinsic detection angle of the radar sensor 720 is 30 degrees to the left and 30 degrees to the right with respect to the front of a total of 60 degrees, and the rotation angle of the flow control device 300 is 45 degrees to the left and right to the front relative to the front. In the case of a total of 90 degrees to 45 degrees, the range of the angle at which the air purifier 10 can detect the user may correspond to a total of 150 degrees to 75 degrees to the left and 75 degrees to the right with respect to the front.

The air purifier 10 may receive a reflected signal with respect to the signal output from the radar sensor 720 (S12). As described above, the signal output from the signal transmitter 722 of the radar sensor 720 may collide with an object existing within a predetermined distance and be reflected. The signal receiver 724 of the radar sensor 720 may receive a reflected signal that collides with an object and returns.

The air purifier 10 may determine the location of the user based on the received reflected signal (S13).

Specifically, the controller 700 may remove the clutter signal from the received reflected signal, and check whether the user is present and the user's location from the reflected signal from which the clutter signal is removed. As described above, the clutter signal corresponds to a signal component reflected from a fixed object, and information on the clutter signal may be pre-stored in the memory unit 730 .

At this time, since the flow control device 300 in which the radar sensor 720 is disposed is rotating, the control unit 700 controls the position identified based on the reflected signal and the flow control device 300 at the time of transmission and reception of the signal. ) based on the rotation angle of the user's exact position can be confirmed. For example, the position of the user identified based on the reflected signal corresponds to 15 degrees to the left, and the rotation angle of the flow control device 300 at the time of transmission and reception of the signal is left based on the front of the air purifier 10 . When the angle corresponds to 30 degrees, the user's exact position may correspond to a position of 45 degrees to the left from the front of the air purifier 10 . Accordingly, the control unit 700 may confirm that the current user is present at a position corresponding to 45 degrees to the left with respect to the front of the air purifier 10 .

The air purifier 10 may control the first gear motor 363 so that the discharge unit (the second discharge unit 305) of the flow control device 300 faces the identified user's position (S14). .

The control unit 700 may control the first gearmotor 363 so that the second discharge unit 305 of the flow control device 300 is directed to the confirmed position of the user.

As in the above example, when the current user is at a position corresponding to 45 degrees to the left with respect to the front of the air purifier 10, the control unit 700 controls the first gear motor 363 to control the flow control device ( 300) can be rotated in a direction corresponding to 45 degrees to the left.

When the second discharge unit 305 faces the confirmed user's position, the control unit 700 may stop the operation of the first gearmotor 363 . Accordingly, the second discharge unit 305 is fixed toward the user's position, so that clean air can be effectively delivered to the user.

Even after the user's location is confirmed and the flow control device 300 is rotated, the air purifier 10 may control the radar sensor 720 to periodically output a signal and receive a reflected signal. Based on this, the air purifier 10 may detect a change in the reflected signal (S15).

For example, when a user moves from a current location to another location, a change may occur in the received reflected signal.

When a change in the reflected signal is detected (YES in S15), the air purifier 10 may check the changed location of the user based on the received reflected signal (S16).

The controller 700 may detect a change in the reflected signal by comparing the previously received reflected signal with the currently received reflected signal. For example, when the difference between the previously received reflected signal and the currently received reflected signal is greater than a reference, the controller 700 may detect that the user has moved from the previous location to another location.

When a change in the reflected signal is detected, the controller 700 may use the radar sensor 720 to check the changed location of the user. According to an embodiment, when the user is not detected at the current position of the flow control device 300 , the control unit 700 controls the first gear motor 363 to rotate the flow control device 300 , while the radar sensor ( 720) may be used to check the changed location of the user.

When the changed location of the user is confirmed, the air purifier 10 controls the first gear motor 363 so that the discharge unit (the second discharge unit 305) of the flow control device 300 faces the changed location of the user. It can be done (S17).

According to an embodiment, when the changed location of the user is not confirmed, that is, when the user no longer exists within a predetermined distance from the air purifier 10 , the controller 700 automatically operates the operation mode of the air purifier 10 . mode, or the operation of the air purifier 10 may be stopped.

According to the embodiment shown in FIG. 17 , the air purifier 10 detects the user's position and automatically adjusts the rotation angle of the flow control device 300, so that the clean air can be delivered to the user more quickly and effectively. .

Although not shown, the air purifier 10 may additionally adjust the air volume based on the identified user's location. Specifically, the controller 700 may calculate the distance between the air purifier 10 and the user from the confirmed user's location, and control the third fan motor 335 to adjust the air volume based on the calculated distance. . For example, the controller 700 may control the third fan motor 335 to increase the air volume as the distance between the air purifier 10 and the user increases. On the other hand, the controller 700 may control the third fan motor 335 to decrease the air volume as the distance between the air purifier 10 and the user is shorter.

18 is a flowchart for explaining the operation of the air purifier according to an embodiment of the present invention.

Steps S10 to S13 shown in FIG. 17 may be similarly applied to the embodiment of FIG. 18 .

Referring to FIG. 18 , when the location of the user is confirmed by using the radar sensor 720 , the air purifier 10 has the discharge unit (the second discharge unit 305 ) of the rotating flow control device 300 . When facing the confirmed user's position, the third fan motor 335 may be controlled to increase the rotation speed of the third fan 330 (S21).

For example, when the flow control device 300 is not fixed in one direction and continues to rotate to the left and right while discharging clean air in various directions, the user may want the clean air to be delivered more to the user's location. can

The controller 700 may check the location of the user through the radar sensor 720 . Since the operation of confirming the user's location using the radar sensor 720 has been described above, a description thereof will be omitted.

When the user's position is confirmed, the control unit 700 increases the rotation speed of the third fan 330 when the second discharge unit 305 of the rotating flow control device 300 faces the user's position. The third fan motor 335 may be controlled. That is, the amount of clean air discharged from the second discharge unit 305 may be discharged more at an angle toward the user.

Specifically, the control unit 700 may obtain information on the rotation angle of the flow control device 300 based on the operating state of the first gear motor 363 . The control unit 700 controls the third fan motor 335 to control the third fan motor 335 when the direction in which the second discharge unit 305 of the flow control device 300 faces according to the rotation angle corresponds to the user's position. The rotation speed of the fan 330 may be increased. After that, when the direction in which the second discharge unit 305 faces is out of the user's position, the control unit 700 controls the third fan motor 335 to reduce the rotation speed of the third fan 330 . have.

Even after the user's location is confirmed, the air purifier 10 may control the radar sensor 720 to periodically output a signal and receive a reflected signal. When the user moves from the current location to another location, a change may occur in the received reflected signal. Based on this, the air purifier 10 may detect a change in the reflected signal (S22).

The controller 700 may detect a change in the reflected signal by comparing the previously received reflected signal with the currently received reflected signal. For example, when the difference between the previously received reflected signal and the currently received reflected signal is greater than a reference, the controller 700 may detect that the user has moved from the previous location to another location.

When a change in the reflected signal is detected, the controller 700 may use the radar sensor 720 to check the changed location of the user (S23). Since the flow control device 300 is rotating, the control unit 700 uses the radar sensor 720 to detect the user's changed position within the range of the angle at which the air purifier 10 described above in FIG. 17 can detect the user. can be checked

When the changed location of the user is confirmed, the air purifier 10 increases the rotation speed of the third fan 330 when the second discharge unit 305 of the flow control device 300 faces the changed location of the user. It is possible to control the third fan motor 335 (S24).

According to an embodiment, when the changed location of the user is not confirmed, that is, when the user no longer exists within a predetermined distance from the air purifier 10 , the controller 700 automatically operates the operation mode of the air purifier 10 . mode, or the operation of the air purifier 10 may be stopped.

According to the embodiment shown in FIG. 18 , the air purifier 10 detects the user's position and increases the air volume when the second discharge unit 305 of the rotating flow control device 300 faces the user, It can deliver clean air to people more effectively.

In particular, the embodiment shown in FIG. 18 may be more effective when a plurality of users exist around the air purifier 10 . For example, when the first user exists at the first position within a predetermined distance from the air purifier 10 and the second user exists at the second position, the air purifier 10 is the rotating flow control device 300 . When the second discharge unit 305 faces the first position, the air volume is increased, when it is out of the first position, the air volume is decreased, and when the second discharge unit 305 faces the second position, the air volume is increased again, and the second position is set. If it is out, the airflow can be reduced again.

19 is a flowchart for explaining an additional embodiment related to the operation of the air purifier shown in FIG. 17 or 18 .

Referring to FIG. 19 , when the user's position is confirmed using the radar sensor 720 , the air purifier 10 determines that the user's position is determined by the rotation of the second discharge unit 305 of the flow control device 300 . It can be checked whether it falls within a possible angle range (S131).

As in the example described above in FIG. 17 , the rotation angle of the flow control device 300 is 45 degrees to the left and 45 degrees to the right with respect to the front of a total of 90 degrees, and the radar sensor 720 disposed in the flow control device 300 . ) is 30 degrees to the left and 30 degrees to the right with a total of 60 degrees, the range of the angle at which the air purifier 10 can detect the user is 75 degrees to the left and right to the front. 75 degrees can correspond to a total of 150 degrees.

If the confirmed user's position is within the rotatable angle range of the flow control device 300 (YES in S131), the air purifier 10 may perform step S14 of FIG. 17 or step S21 of FIG. 18. have.

Meanwhile, the rotatable angular range of the flow control device 300 may be smaller than the angular range in which the air purifier 10 can detect the user. Accordingly, the user's position sensed by the radar sensor 720 may be out of the rotatable angular range of the flow control device 300 . For example, when the user is at a position corresponding to 60 degrees to the left with respect to the front of the air purifier 10 , the air purifier 10 may use the radar sensor 720 to check the user's position, The flow control device 300 cannot be rotated to the corresponding position.

That is, when the user's position does not fall within the rotatable angle range of the flow control device 300 (NO in S131 ), the air purifier 10 is positioned outside the rotatable angle range of the flow control device 300 by the user. It can be informed that it exists in (S132).

The control unit 700 may notify, through an output device such as the display device 600 , that the user is in a position outside the rotatable angle range of the flow control device 300 . Alternatively, the control unit 700 moves the air purifier 10 itself to a predetermined position while notifying through an output device such as the display device 600 that the flow control device 300 cannot be rotated to face the user. It can be guided to rotate in a predetermined direction.

As described above, when the user is at a position corresponding to 60 degrees to the left with respect to the front of the air purifier 10, the control unit 700 of the air purifier 10 rotates the air purifier 10 itself in the left direction. A notification guiding to rotate a predetermined angle may be output through the display apparatus 600 . The user may rotate the air purifier 10 by a predetermined angle in the left direction based on the output notification, and then steps S11 to S13 may be performed again. In this case, since the user's position will fall within the rotatable angular range of the second discharge unit 305 of the flow control device 300, the air purifier 10 performs step S14 of FIG. 17 or step S21 of FIG. can be done

According to the embodiment shown in FIG. 19 , the air purifier 10 provides a kind of guide for moving or rotating the air purifier 10 so that the user is located within the rotatable angle range of the flow control device 300 , so that the user can It is possible to effectively receive the purified air from the air purifier (10).

In particular, when there are a plurality of users, the air purifier 10 provides the user with the air purifier 10 by guiding the location or direction of the air purifier 10 for effectively delivering the purified air to each of the plurality of users. ) provides the effect of conveniently installing in the optimal position or direction.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains.

Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments.

The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (13)

In the air purifier,
an air cleaning module having a fan and a filter member;
a flow control device provided on the upper side of the air cleaning module to rotate in the left and right directions based on a vertical rotation axis, and having a circulation fan;
a radar sensor for detecting a location of a user within a predetermined distance from the air purifier; and
Confirming the location of the user based on the detection result of the radar sensor,
A control unit for controlling a rotation angle of the flow control device or the circulation fan based on the identified position to adjust a discharge direction or a discharge air volume,
The flow control device,
a first gear motor for generating a driving force for left and right rotation of the flow control device; and
Further comprising a second gear motor for generating a driving force for vertical rotation of the flow control device,
When the flow control device is driven, the control unit controls the second gearmotor so that the flow control device rotates from a first position parallel to the ground to a second position having a predetermined angular inclination upward,
As the flow regulator is rotated to the second position, the radar sensor is oriented in a horizontal direction. According to claim 1,
The radar sensor is an air purifier disposed on the upper surface of the flow control device. delete According to claim 1,
In the flow control device,
An air purifier having a radar sensor fixing unit recessed from the upper surface to the inside to fix the radar sensor to face the radar sensor in a horizontal direction in a state in which the flow control device is rotated to the second position. 5. The method of claim 4,
In a state in which the flow control device is rotated to the second position, the radar sensor fixing unit and the ground are perpendicular to each other. The method of claim 1,
The flow control device,
The air purifier further comprising a protrusion fixing part which is formed to protrude on the upper surface and for fixing the radar sensor to face the radar sensor in a horizontal direction in a state in which the flow control device is rotated to the second position. 3. The method of claim 2,
The control unit is
During the left and right rotation of the flow control device, the position of the user existing within a predetermined angular range is confirmed through the radar sensor,
The predetermined angle range is an air purifier corresponding to the sum of the left-right rotation angle of the flow control device and the intrinsic detection angle of the radar sensor. 8. The method of claim 7,
For the operation of the air cleaning module or the flow control device, further comprising an input unit for inputting a command regarding an operation mode,
The control unit is
When the driving mode is selected as the user tracking driving mode through the input unit, the air purifier controls the radar sensor to check the location of the user. 8. The method of claim 7,
Further comprising a display device for displaying the driving information of the air purifier,
The control unit is
When the identified user's position corresponds to a position outside the left-right rotation angle of the flow control device,
An air purifier displaying a notification through the display device for guiding to move the installation position or change the installation direction of the air purifier. 3. The method of claim 2,
The control unit is
During the left and right rotation of the flow control device, the position of the user is confirmed through the radar sensor,
Based on the confirmation result, the air purifier for controlling the first gear motor so that the discharge portion of the flow control device is fixed toward the position of the user. 11. The method of claim 10,
The control unit is
Detecting that the user's location is changed through the radar sensor,
An air purifier for controlling the first gear motor so that the discharge unit is fixed toward the changed position. 3. The method of claim 2,
The flow control device,
Further comprising a fan motor providing a driving force for rotation of the circulation fan,
The control unit is
During the left and right rotation of the flow control device, the position of the user is confirmed through the radar sensor,
An air purifier for controlling the fan motor to increase the rotation speed of the circulation fan when the discharge part of the rotating flow control device faces the identified user position. According to claim 1,
The radar sensor is an air purifier comprising a UWB (Ultra Wide-Band) radar sensor.

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