KR102622931B1 - Air clean fan - Google Patents

Abstract

In the present invention, a discharge port is disposed on the rear side of the tower, a slit is disposed on the front side of the tower, and the air flow direction of the discharge air can be adjusted through an air flow converter that opens and closes the slit. The present invention has the advantage that a slit is disposed in front of the discharge port, and the air flow direction of the discharge air can be adjusted by opening and closing the slit.

Description

Air clean fan {Air clean fan}

The present invention relates to an air clean fan that discharges air through the Coanda effect.

In general, a blower is a mechanical device that drives a fan to create air flow. A conventional blower includes a fan that rotates around a rotation axis, and a motor rotates the fan to generate wind.

Conventional fans using axial fans have the advantage of providing wind over a wide area, but have the problem of not being able to provide wind concentrated in a narrow area.

Korean Patent No. 10-1331487 describes a fan that provides wind to the user using the Coanda effect.

Conventional fans had the problem of providing wind only to a certain area because they used the Coanda effect.

Republic of Korea Patent No. 10-1331487

The purpose of the present invention is to provide an air clean fan that can provide air to the user through the Coanda effect.

The purpose of the present invention is to provide an air clean fan that can adjust the air discharge width through the Coanda effect.

The purpose of the present invention is to provide an air clean fan that can control the width or direction of discharged air by interfering with the main flow of air with a sub-flow for air flow control.

In the present invention, a discharge port is disposed on the rear side of the tower, a slit is disposed on the front side of the tower, and the air flow direction of the discharge air can be adjusted through an air flow converter that opens and closes the slit.

In the present invention, a first discharge port is disposed on the rear side of the first tower, a first slit is disposed on the front side of the first tower, a second discharge port is disposed on the rear side of the second tower, and a first slit is disposed on the front side of the second tower. A second slit is disposed on the side, and the air flow direction of the discharge air flowing along the surface of the first tower is adjusted through a first air flow converter that opens and closes the first slit, and a second air flow that opens and closes the second slit. The airflow direction of the discharged air flowing along the surface of the second tower can be adjusted through the converter.

The present invention includes a tower formed by extending elongatedly in the vertical direction; an outlet disposed at the rear of the tower; a slit disposed on the front side of the tower; a fan disposed inside the tower and blowing air toward the discharge port and slit; It includes an airflow converter disposed on the tower and opening and closing the slit.

The discharge port may extend vertically along the length of the tower.

The slit may extend vertically along the longitudinal direction of the tower.

At least a portion of the slit may be disposed within the height of the discharge hole.

The longitudinal direction of the discharge port may be arranged so that the longitudinal direction of the slit intersects.

The discharge port may be arranged in a vertical direction along the rear end of the tower.

The slits may be arranged in a vertical direction along the front end of the tower.

The air flow converter includes a door that opens and closes the slit; It may include an actuator that provides driving force to the door.

The door may be placed inside the tower.

The actuator is a motor, and includes a driving gear disposed on a motor shaft of the motor and transmitting a driving force of the motor to the door; It may further include a driven gear disposed on the door and meshed with the driving gear.

It may further include a door shaft coupled to the driven gear and rotatably assembled to the tower.

The tower further includes a first tower and a second tower arranged to face each other with a blowing space in between, and the discharge port is arranged in the first tower and the second tower. a second discharge port; wherein the slit further includes a first slit disposed in the first tower, and a second slit disposed in the second tower, and the air flow converter further includes a first slit disposed in the first tower. It may further include a first airflow converter disposed on the tower and opening and closing the first slit, and a second airflow converter disposed on the second tower and opening and closing the second slit.

The first discharge port and the second discharge port may be arranged to face each other, with the blowing space interposed therebetween.

The first slit and the second slit may be arranged to face each other, with the blowing space between them.

At least a portion of the first slit may be disposed within a height of the first discharge opening, and at least a portion of the second slit may be disposed within a height of the second discharge opening.

The first discharge port and the second discharge port may be arranged in parallel.

The first slit and the second slit may be arranged in parallel.

The present invention includes: a first tower extending long in the vertical direction; a second tower extending vertically; a blowing space disposed between the first tower and the second tower; a first discharge port disposed at a rear side of the first tower; a first slit disposed on a front side of the first tower; a second outlet disposed at a rear side of the second tower; a second slit disposed on a front side of the second tower; a first airflow converter disposed inside the first tower and driving a first door to open and close the first slit; It includes a second airflow converter disposed inside the second tower and driving the second door to open and close the second slit.

The air clean fan according to the present invention has one or more of the following effects.

First, the present invention has the advantage that a slit is disposed in front of the discharge port, and the air flow direction of the discharge air can be adjusted by opening and closing the slit.

Second, the present invention has the advantage that when the slit is closed, the discharge air discharged from the discharge port flows along the inner wall due to the Coanda effect, providing a wide airflow.

Third, the present invention has the advantage that when the slit is opened, the discharged air discharged from the discharge port interferes with the air discharged from the slit and can be concentrated toward the center line of the blowing space, thereby providing a concentrated airflow.

Fourth, the present invention has the advantage that when either the first slit or the second slit is opened, a concentrated airflow is formed on the open slit side and a wide airflow is provided on the unopened slit side.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Figure 1 is a perspective view of an air clean fan according to a first embodiment of the present invention.
Figure 2 is an operation example of Figure 1.
Figure 3 is a front view of Figure 1.
Figure 4 is a plan view of Figure 3.
Figure 5 is a cross-sectional view of the right side of Figure 1.
Figure 6 is a front cross-sectional view of Figure 1.
FIG. 7 is a partially exploded perspective view showing the interior of the second tower of FIG. 1.
Figure 8 is a right side view of Figure 7.
Figure 9 is a plan cross-sectional view taken along AA of Figure 3.
Figure 10 is a bottom cross-sectional view taken along AA of Figure 3.
Figure 11 is an exploded perspective view of the air flow converter shown in Figure 7.
Figure 12 is an exemplary diagram showing the horizontal airflow of the air clean fan according to the first embodiment of the present invention.
Figure 13 is an exemplary diagram showing the wide airflow of the air clean fan according to the first embodiment of the present invention.
Figure 14 is an exemplary diagram showing the concentrated airflow of the air clean fan according to the first embodiment of the present invention.
Figure 15 is an exemplary diagram showing the left wide airflow of the air clean fan according to the first embodiment of the present invention.
Figure 16 is an exemplary diagram showing the right wide airflow of the air clean fan according to the first embodiment of the present invention.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are merely provided to ensure that the disclosure of the present invention is complete and to be understood by those skilled in the art. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Figure 1 is a perspective view of an air clean fan according to a first embodiment of the present invention. Figure 2 is an operation example of Figure 1. Figure 3 is a front view of Figure 1, and Figure 4 is a top view of Figure 3.

1 to 4, the air clean fan 1 according to an embodiment of the present invention includes a case 100 that provides an external appearance. The case 100 includes a base case 150 in which the filter 200 is installed, and a tower case 140 that discharges air through the Coanda effect.

And the tower case 140 includes a first tower 110 and a second tower 120 arranged separately in the form of two pillars. In this embodiment, the first tower 110 is placed on the left, and the second tower 120 is placed on the right.

The first tower 110 and the second tower 120 are spaced apart, and a blowing space 105 is formed between the first tower 110 and the second tower 120.

In this embodiment, the blowing space 105 is opened at the front, rear, and top, and the upper and lower ends of the blowing space 105 are spaced equally.

In this embodiment, the tower case 140 including the first tower, the second tower, and the blowing space is formed in the shape of a truncated cone. Unlike the present embodiment, the tower case 140 may be formed in a cylindrical shape that is long in the vertical direction.

The discharge ports 117 and 127 respectively disposed in the first tower 110 and the second tower 120 discharge air into the blowing space 105. When distinction of discharge ports is necessary, the discharge port formed in the first tower 110 is called the first discharge port 117, and the discharge port formed in the second tower 120 is called the second discharge port 127.

The first discharge port and the second discharge port are disposed within the height of the blowing space, and a direction crossing the blowing space 105 is defined as the air discharge direction.

Since the first tower 110 and the second tower 120 are disposed on the left and right, the air discharge direction in this embodiment can be formed in the front-back direction.

That is, the air discharge direction crossing the blowing space 105 includes the first air discharge direction S1 arranged in the horizontal direction. The air flowing in the first air discharge direction (S1) is called a horizontal airflow.

It should be understood that the horizontal airflow does not mean that air flows only in the horizontal direction, but that the flow rate of air flowing in the horizontal direction is greater.

In this embodiment, the upper and lower gaps of the blowing space 105 are formed to be the same. Unlike the present embodiment, the upper spacing of the blowing space 105 may be narrower or wider than the lower spacing.

By making the left and right widths of the blowing space 105 constant, the flow of air flowing in front of the blowing space can be formed more uniformly.

For example, if the width of the upper side and the width of the lower side are different, the flow speed on the wider side may be formed to be low, and a speed deviation may occur based on the vertical direction. If there is a deviation in the air flow velocity in the up and down directions, the arrival length of the air may vary.

The air discharged from the first outlet and the second outlet may join in the blowing space 105 and then flow to the user.

That is, in this embodiment, the discharge air from the first discharge port 117 and the discharge air from the second discharge port 127 do not flow to the user individually, but the discharge air from the first discharge port 117 and the discharge air from the second discharge port 127 ) discharge air is combined in the blowing space 105 and then provided to the user.

The blowing space 105 can be used as a space where discharge air is combined and mixed. In addition, the air behind the blowing space can also flow into the blowing space by the discharge air discharged into the blowing space 105.

By combining the discharge air from the first discharge port 117 and the discharge air from the second discharge port 127 in the blowing space, the straightness of the discharge air can be improved. Additionally, by combining the discharge air from the first discharge port 117 and the discharge air from the second discharge port 127 in the blowing space, the air around the first tower and the second tower can also flow indirectly in the air discharge direction.

In this embodiment, the first air discharge direction S1 is formed from rear to front.

And for the first air discharge direction (S1), the front end 112 of the first tower 110 and the front end 122 of the second tower 120 are spaced apart, and the rear end of the first tower 110 ( 113) and the rear end 123 of the second tower 120 are also spaced apart.

The surface of the first tower 110 and the second tower 120 facing the blowing space 105 is referred to as the inner surface, and the surface not facing the blowing space 105 is referred to as the outer surface.

The outer wall 114 of the first tower 110 and the outer wall 124 of the second tower 120 are disposed in opposite directions, and the inner wall 115 of the first tower 110 and the second tower ( The inner walls 125 of 120) face each other.

When it is necessary to distinguish between the inner walls 115 and 125, the inner side of the first tower is called the first inner wall 115, and the inner side of the second tower is called the second inner wall 125.

The first inner wall 115 is formed to be convex toward the second tower, and the second inner wall 125 is formed to be convex toward the first tower.

Similarly, when it is necessary to distinguish between the outer walls 114 and 124, the outer surface of the first tower is referred to as the first outer wall 114, and the outer surface of the second tower is referred to as the second outer wall 124.

The first tower 110 and the second tower 120 are formed in a streamlined shape with respect to the air flow direction.

Specifically, the first inner wall 115 and the first outer wall 114 are formed in a streamlined shape in the front-to-back direction, and the second inner wall 125 and the second outer wall 124 are formed in a streamlined shape in the front-to-back direction. do.

The first discharge port 117 is disposed on the first inner wall 115, and the second discharge port 127 is disposed on the second inner wall 125.

The shortest distance between the first inner wall 115 and the second inner wall 125 is B0. The discharge ports 117 and 127 are located rearward of the shortest distance B0.

The separation distance between the front end 112 of the first tower 110 and the front end 122 of the second tower 120 is referred to as the first separation distance B1, and the rear end 113 of the first tower 110 and the second The separation distance between the rear end 123 of the tower 120 is referred to as the second separation distance B2.

In this embodiment, B1 and B2 are formed identically. Unlike this embodiment, the length of either B1 or B2 may be formed longer.

The first outlet 117 and the second outlet 127 are disposed between B0 and B2.

The first outlet 117 and the second outlet 127 are preferably disposed closer to the rear end 113 of the first tower 110 and the rear end 123 of the second tower 120 than to B0.

The closer the discharge ports 117 and 127 are located to the rear ends 113 and 123, the easier it is to control airflow through the Coanda effect, which will be described later.

The inner wall 115 of the first tower 110 and the inner wall 125 of the second tower 120 directly provide the Coanda effect, and the outer wall 114 of the first tower 110 and the second tower 120 provide the Coanda effect. 2 The outer wall 124 of the tower 120 indirectly provides the Coanda effect.

The inner walls 115 and 125 directly guide the air discharged from the discharge ports 117 and 127 to the front ends 112 and 122.

That is, the air discharged from the discharge ports 117 and 127 directly provides a horizontal airflow.

Due to the air flow in the blowing space 105, indirect air flow also occurs in the outer walls 114 and 124.

The outer walls 114 and 124 cause the Coanda effect to the indirect air flow and guide the indirect air flow to the front ends 112 and 122.

The left side of the blowing space is blocked by the first inner wall 115, the right side of the blowing space is blocked by the second inner wall 125, but the upper side of the blowing space 105 is open.

Additionally, the width of the discharged air can be adjusted through the flow rate of the air combined in the blowing space.

By forming the top and bottom lengths of the first outlet 117 and the second outlet 127 to be much longer than the left and right widths (B0, B1, B2) of the blowing space, the discharge air from the first outlet and the discharge air from the second outlet are You can encourage them to join at Blowing Space.

1 to 3, the case 100 of the air clean fan 1 according to an embodiment of the present invention includes a base case 150 on which a filter 200 is detachably installed, and the base case ( 150) It is disposed on the upper side and includes a tower case 140 supported on the base case 150.

The tower case 140 includes the first tower 110 and the second tower 120.

In this embodiment, a tower base 130 connecting the first tower 110 and the second tower 120 is disposed, and the tower base 130 is assembled to the base case 150. The tower base 130 may be manufactured integrally with the first tower 110 and the second tower 120.

Unlike this embodiment, the first tower 110 and the second tower 120 can be directly assembled to the base case 150 without the tower base 130, and can be manufactured integrally with the base case 150. It may be possible.

The base case 150 forms the lower part of the air clean fan (1), and the tower case 140 forms the upper part of the air clean fan (1).

The air clean fan 1 can suck in ambient air from the base case 150 and discharge filtered air from the tower case 140. The tower case 140 may discharge air at a higher position than the base case 150.

The air clean fan (1) has a pillar shape whose diameter becomes smaller as it moves upward. The air clean fan 1 may have an overall cone or truncated cone shape.

Unlike the present embodiment, the air clean fan 1 may include a form in which two towers are arranged. Additionally, unlike the present embodiment, the cross section does not have to be narrowed toward the top.

However, when the cross-section becomes narrower toward the top as in this embodiment, there is an advantage in that the center of gravity is lowered and the risk of falling due to external impact is reduced.

For convenience of assembly, in this embodiment, it is manufactured separately into a base case 150 and a tower case 140.

Unlike this embodiment, the base case 150 and the tower case 140 may be integrated. For example, the base case and tower case can be manufactured in the form of a front case and a rear case manufactured as one piece and then assembled.

In this embodiment, the base case 150 is formed to have a gradually smaller diameter toward the top. The tower case 140 is also formed to have a gradually smaller diameter toward the top.

The outer surfaces of the base case 150 and the tower case 140 are formed at reverse speeds. In particular, the lower end of the tower base 130 and the upper end of the base case 150 are in close contact, and the outer surface of the tower base 130 and the outer surface of the base case 150 form a continuous surface.

To this end, the bottom diameter of the tower base 130 may be formed to be equal to or slightly smaller than the top diameter of the base case 150.

The tower base 130 distributes filtered air supplied from the base 150 tower and provides the distributed air to the first tower 110 and the second tower 120.

The tower base 130 connects the first tower 110 and the second tower 120, and the blowing space 105 is disposed above the tower base 130.

In addition, the discharge ports 117 and 127 are disposed on the upper side of the tower base 130, and the horizontal airflow is formed on the upper side of the tower base 130.

In order to minimize friction with air, the upper side 131 of the tower base 130 is formed as a curved surface. In particular, the upper side is formed as a curved surface that is concave downward and extends in the front-back direction. One side 131a of the upper side 131 is connected to the first inner wall 115, and the other side 131b of the upper side 131 is connected to the second inner wall 125.

Referring to FIG. 4, when viewed from the top, the first tower 110 and the second tower 120 are left and right symmetrical with respect to the center line L-L'. In particular, the first outlet 117 and the second outlet 127 are arranged symmetrically left and right with respect to the center line L-L'.

The center line L-L' is an imaginary line between the first tower 110 and the second tower 120, and in this embodiment is arranged in the front-back direction and passes through the upper side 131.

Unlike this embodiment, the first tower 110 and the second tower 120 may be formed in an asymmetric shape. However, it is more advantageous to control horizontal and upward airflows if the first tower 110 and the second tower 120 are arranged symmetrically with respect to the center line L-L'.

Figure 5 is a right cross-sectional view of Figure 1, and Figure 6 is a front cross-sectional view of Figure 1.

Referring to Figures 1, 5, or 6, the air clean fan 1 includes a filter 200 disposed inside the case 100, and a filter 200 disposed inside the case 100 to direct air through the discharge port ( It includes a fan device 300 that flows to 117)(127).

In this embodiment, the filter 200 and the fan device 300 are disposed inside the base case 150.

The base case 150 is formed in the shape of a truncated cone, and in this embodiment, the upper side is open.

The base case 150 includes a base 151 that is seated on the ground, and a base outer 152 that is coupled to the upper side of the base 151, has a space therein, and has an intake port 155.

When viewed from the top, the base 151 is formed in a circular shape. The base 151 may have various shapes.

The base outer 152 is formed in the shape of a truncated cone with openings on the upper and lower sides. Additionally, a portion of the side surface of the base outer 152 is formed to be open. The opened portion of the base outer 152 is called a filter insertion port 154.

The case 100 further includes a cover 153 that shields the filter insertion hole 154. The cover 153 is detachably assembled from the base outer 152, and the filter 200 can be mounted or assembled on the cover 153.

The user can remove the cover 153 and take the filter 200 out of the case 100.

The intake port 155 may be formed in at least one of the base outer 152 and the cover 153. In this embodiment, the intake port 155 is formed in both the base outer 152 and the cover 153, and can suck air from all 360 directions around the case 100.

In this embodiment, the intake port 155 is formed in the shape of a hole, and the shape of the intake port 155 can be formed in various ways.

The filter 200 is formed in a cylindrical shape with a vertical hollow formed inside. The outer surface of the filter 200 faces the suction port 155.

Indoor air flows through the filter 200 from the outside to the inside, and in this process, foreign substances or harmful gases in the air can be removed.

The fan device 300 is disposed above the filter 200. The fan device 300 may flow air that has passed through the filter 200 to the first tower 110 and the second tower 120.

The fan device 300 includes a fan motor 310 and a fan 320 rotated by the fan motor 310, and is disposed inside the base case 150.

The fan motor 310 is disposed above the fan 320, and the motor shaft of the fan motor 310 is coupled to the fan 320 disposed below.

A motor housing 330 in which the fan motor 310 is installed is disposed above the fan 320.

In this embodiment, the motor housing 330 has a shape that surrounds the entire fan motor 310. Since the motor housing 330 surrounds the entire fan motor 310, flow resistance with air flowing from the bottom to the top can be reduced.

Unlike this embodiment, the motor housing 330 may be formed to surround only the lower part of the fan motor 310.

The motor housing 330 includes a lower motor housing 332 and an upper motor housing 334. At least one of the lower motor housing 332 and the upper motor housing 334 is coupled to the case 100.

In this embodiment, the lower motor housing 332 is coupled to the case 100. After the fan motor 310 is installed on the upper side of the lower motor housing 332, the upper motor housing 334 is covered to cover the fan motor 310.

The motor shaft of the fan motor 310 penetrates the lower motor housing 332 and is assembled to the fan 320 disposed below.

The fan 320 may include a hub to which the shaft of the fan motor is coupled, a shroud spaced apart from the hub, and a plurality of blades connecting the hub and the shroud.

The air that has passed through the filter 200 is sucked into the shroud, and then is pressurized and flows by the rotating blade. The hub is disposed on the upper side of the blade, and the shroud is disposed on the lower side of the blade. The hub may be formed in a bowl shape concave downward, and a portion of the lower side of the lower motor housing 332 may be inserted.

In this embodiment, the fan 320 is a mixed flow fan. A flow fan sucks in air at the center of its axis and discharges air in a radial direction, but has the characteristic that the discharged air is inclined with respect to the axial direction.

Since the overall air flow flows from the bottom to the top, when air is discharged in the radial direction like a general centrifugal fan, a large flow loss occurs due to change in flow direction.

The mixed flow fan can minimize air flow loss by discharging air upward in the radial direction.

Meanwhile, a diffuser 340 may be further disposed above the fan 320. The diffuser 340 guides the air flow caused by the fan 320 in an upward direction.

The diffuser 340 serves to further reduce the radial component of the air flow and strengthen the upward air flow component.

The motor housing 330 is disposed between the diffuser 340 and the fan 320.

In order to minimize the vertical installation height of the motor housing, the lower end of the motor housing 330 may be inserted into the fan 320 and overlap with the fan 320. Additionally, the top of the motor housing 330 may be inserted into the diffuser 340 and overlap with the diffuser 340.

Here, the lower end of the motor housing 330 is placed higher than the lower end of the fan 320, and the upper end of the motor housing 330 is placed lower than the upper end of the diffuser 340.

In order to optimize the installation location of the motor housing 330, in this embodiment, the upper side of the motor housing 330 is placed inside the tower base 130, and the lower side of the motor housing 330 is positioned inside the base case 150. ) is placed inside. Unlike this embodiment, the motor housing 330 may be placed inside the tower base 130 or the base case 150.

Meanwhile, a suction grill 350 may be disposed inside the base case 150. The suction grill 350 is used to prevent the user's fingers from entering the fan 320 when the filter 200 is separated, thereby protecting the user and the fan 320.

The filter 200 is disposed below the suction grill 350, and the fan 320 is disposed above. The suction grill 350 has a plurality of through holes formed in the vertical direction to allow air to flow.

Inside the case 100, the space below the suction grill 350 is defined as the filter installation space 101. Inside the case 100, the space between the suction grill 350 and the discharge ports 117 and 127 is defined as the blowing space 102. Inside the case 100, the internal space of the first tower 110 and the second tower 120 where the discharge ports 117 and 127 are disposed is defined as the discharge space 103.

Indoor air flows into the filter installation space 101 through the intake port 155 and is then discharged to the discharge ports 117 and 127 through the blowing space 102 and the discharge space 103.

FIG. 7 is a partially exploded perspective view showing the inside of the second tower of FIG. 1, and FIG. 8 is a right side view of FIG. 7.

Referring to Figures 5 to 8, an air guide 160 is disposed in the discharge space 103 to change the flow direction of air to the horizontal direction. A plurality of air guides 160 may be arranged.

The air guide 160 changes the direction of air flowing from the bottom to the top in the horizontal direction, and the changed air flows to the discharge ports 117 and 127.

When classification of air guides is necessary, the one placed inside the first tower 110 is called the first air guide 161, and the one placed inside the second tower 120 is called the second air guide 162.

When viewed from the front, the first air guide 161 may be coupled to the inner and/or outer walls of the first tower 110. When viewed from the side, the front end 161a of the first air guide 161 is close to the first discharge port 117, and the rear end 161b is spaced apart from the rear end of the first tower 110.

In order to guide the air flowing from the bottom to the first outlet 117, the first air guide 161 is formed as a convex curved surface from the bottom to the top, and the rear end 161b is larger than the front end 161a. placed low.

At least a portion of the left end 161c of the first air guide 161 may be in close contact with or coupled to the left wall of the first tower 110. At least a portion of the right end 161d of the first air guide 161 may be in close contact with or coupled to the right wall of the first tower 110.

Therefore, the air moving upward along the discharge space 103 flows from the rear end to the front end of the first air guide 161.

The second air guide 162 is left and right symmetrical to the first air guide 161.

When viewed from the front, the second air guide 162 may be coupled to the inner and/or outer walls of the second tower 110. When viewed from the side, the front end 162a of the second air guide 162 is close to the second discharge port 127, and the rear end 162b is spaced apart from the rear end of the second tower 120.

In order to guide the air flowing from the bottom to the second outlet 127, the second air guide 162 is formed as a convex curved surface from the bottom to the top, and the rear end 162b is larger than the front end 162a. placed low.

At least a portion of the left end 162c of the second air guide 162 may be in close contact with or coupled to the left wall of the second tower 120. At least a portion of the right end 162d of the second air guide 162 may be in close contact with or coupled to the right wall of the first tower 110.

Next, referring to Figures 5 or 8, the first discharge port 117 and the second discharge port 127 according to this embodiment are arranged to extend long in the vertical direction.

The first discharge port 117 is disposed between the front end 112 and the rear end 113 of the first tower 110 and close to the rear end 113. The air discharged from the first discharge port 117 may flow along the first inner wall 115 and toward the front end 112 due to the Coanda effect.

The first discharge port 117 has a first border 117a forming an edge on the air discharge side (front end in this embodiment), and a second border 117b forming an edge on the opposite side of the air discharge (rear end in this embodiment). ), an upper border 117c forming the upper edge of the first discharge opening 117, and a lower border 117d forming the lower edge of the first discharge opening 117.

In this embodiment, the first border 117a and the second border 117b are arranged parallel to each other. The upper border 117c and lower border 117d are arranged parallel to each other.

The first border 117a and the second border 117b are disposed at an angle with respect to the vertical direction V. Additionally, the rear end 113 of the first tower 110 is also disposed at an angle with respect to the vertical direction (V).

In this embodiment, the inclination (a1) of the first border (117a) and the second border (117b) with respect to the vertical direction (V) is formed at 4 degrees, and the inclination (a2) of the rear end (113) is formed at 3 degrees. . That is, the inclination (a1) of the discharge port 117 is formed to be greater than the inclination of the outer surface of the tower.

The second outlet 127 is left and right symmetrical with the first outlet 117.

The second discharge port 127 has a first border 127a forming an edge on the air discharge side (front end in this embodiment) and a second border 127b forming an edge on the opposite side of the air discharge (rear end in this embodiment). ), an upper border 127c forming the upper edge of the second discharge opening 127, and a lower border 127d forming the lower edge of the second discharge opening 127.

The first border 127a and the second border 127b are disposed inclined with respect to the vertical direction (V), and the rear end 113 of the first tower 110 is also disposed inclined with respect to the vertical direction (V). And the inclination (a1) of the discharge port 127 is formed to be greater than the inclination (a2) of the outer surface of the tower.

FIG. 9 is a plan cross-sectional view taken along line A-A of FIG. 3, and FIG. 10 is a bottom cross-sectional view cut along line A-A of FIG. 3.

5, 9 or 10, the first discharge port 117 of the first tower 110 is disposed toward the second tower 120, and the second discharge port of the second tower 120 (127) is arranged to face the first tower (110).

Air discharged from the first discharge port 117 may flow along the inner wall 115 of the first tower 110 through the Coanda effect. The air discharged from the second outlet 127 may flow along the inner wall 125 of the second tower 120 through the Coanda effect.

This embodiment further includes a first discharge case 170 and a second discharge case 180.

The first discharge port 117 is formed in the first discharge case 170, and the first discharge case 170 is assembled to the first tower 110. The second discharge port 127 is formed in the second discharge case 180, and the second discharge case 180 is assembled to the second tower 120.

The first discharge case 170 is installed to penetrate the inner wall 115 of the first tower 110, and the second discharge case 180 penetrates the inner wall 125 of the second tower 120. It is installed penetratingly.

A first discharge opening 118 in which the first discharge case 170 is installed is formed in the first tower 110, and the second discharge case 180 is installed in the second tower 120. 2 A discharge opening 128 is formed.

The first discharge case 170 forms a first discharge port 117, and includes a first discharge guide 172 disposed on the air discharge side of the first discharge port 117, and the first discharge port 117. And, it includes a second discharge guide 174 disposed on the opposite side of the first discharge port 117 from which the air is discharged.

The outer surfaces 172a and 174a of the first discharge guide 172 and the second discharge guide 174 provide a portion of the inner wall 115 of the first tower 110.

The inside of the first discharge guide 172 is disposed toward the first discharge space 103a, and the outside is disposed toward the blowing space 105. The inside of the second discharge guide 174 is disposed toward the first discharge space 103a, and the outside of the second discharge guide 174 is disposed toward the blowing space 105.

The outer surface 172a of the first discharge guide 172 may be formed as a curved surface. The outer surface 172a may provide a continuous surface with the first inner wall 115. In particular, the outer surface 172a forms a curved surface that is continuous with the outer surface of the first inner wall 115.

The outer surface 174a of the second discharge guide 174 may provide a continuous surface with the first inner wall 115. The inner surface 174b of the second discharge guide 174 may be formed as a curved surface. In particular, the inner surface 174b forms a curved surface continuous with the inner surface of the first outer wall 114, and through this, the air in the first discharge space 103a can be guided toward the first discharge guide 172. there is.

The first discharge port 117 is formed between the first discharge guide 172 and the second discharge guide 174, and the air in the first discharge space 103a is discharged through the first discharge port 117. It is discharged into the blowing space (105).

Specifically, the air in the first discharge space 103a is discharged between the outer surface 172a of the first discharge guide 172 and the inner surface 174b of the second discharge guide 174, and the first discharge guide 172 A discharge interval 175 is defined between the outer surface 172a of 172 and the inner surface 174b of the second discharge guide 174. The discharge interval 175 forms a predetermined channel.

As for the discharge interval 175, the width of the middle portion 175b is narrower than that of the inlet 175a and the outlet 175c. The middle portion 175b is defined as the shortest distance between the second border 117b and the outer surface 172a.

The cross-sectional area of the discharge interval 175 gradually narrows from the inlet to the middle portion 175b, and the cross-sectional area widens again from the middle portion 175b to the outlet 175c. The middle portion 175b is located inside the first tower 110. When viewed from the outside, the outlet 175c of the discharge interval 175 may be seen as the discharge port 117.

In order to induce the Coanda effect, the radius of curvature of the inner surface 174b of the second discharge guide 174 is formed to be larger than the radius of curvature of the outer surface 172a of the first discharge guide 172.

The center of curvature of the outer surface 172a of the first discharge guide 172 is located ahead of the outer surface 172a and is formed inside the first discharge space 103a. The center of curvature of the inner surface 174b of the second discharge guide 174 is located on the side of the first discharge guide 172 and is formed inside the first discharge space 103a.

The second discharge case 180 forms a second discharge port 127, and includes a first discharge guide 182 disposed on the air discharge side of the second discharge port 127, and the second discharge port 127. and a second discharge guide 184 disposed on the opposite side of the second discharge port 127 from which the air is discharged.

A discharge gap 185 is formed between the first discharge guide 182 and the second discharge guide 184.

Since the second discharge case 180 is left and right symmetrical to the first discharge case 170, detailed description is omitted.

Figure 11 is an exploded perspective view showing the air flow converter shown in Figure 7.

Referring to FIGS. 7 to 11, the air clean fan 1 may further include an air flow converter 1400 that changes the air flow direction of the blowing space 105.

In this embodiment, the air flow converter 1400 generates air interference with the air discharged from each discharge port 117 and 127, and can change the air flow of the discharged air through the air interference.

In this embodiment, the air flow converter 1400 can discharge the air inside the first tower 110 and the second tower 120 into the blowing space 105. The air clipper (1) further includes slits (1410) (1420) for the airflow converter (1400).

A first slit 1410 is disposed on the front end 112 of the first tower 110, and a second slit 1420 is disposed on the front end side of the second tower 120.

The first slit 1410 is formed to extend long in the vertical direction of the first tower 110. The first slit 1410 may be arranged parallel to the front end 112. The first slit 1410 may be formed to penetrate the first inner wall 115, and the first discharge space 103a and the blowing space 105 may be communicated through the first slit 1410. .

The first slit 1410 is disposed toward the blowing space 105 or the second inner wall 125. The first slit 1410 may be disposed within the height of the first discharge hole 117.

In this embodiment, the longitudinal direction of the first slit 1410 and the longitudinal direction of the first discharge port 117 intersect. Unlike this embodiment, the longitudinal direction of the first slit 1410 and the longitudinal direction of the first discharge port 117 may be parallel.

The first slit 1410 and the second slit 1420 are left and right symmetrical about the center line L-L'.

Referring to FIG. 7, the first slit 1410 is disposed on the front end 112 side of the first tower 110 and forms a front edge of the first slit 1410. ) and a second border 1412 disposed on the side of the first discharge port 117 and forming a rear edge of the first slit 1410, and the first border 1411 and the second border 1412 It includes a third border 1413 connecting the upper ends of the and a fourth border 1414 connecting the lower ends of the first border 1411 and the second border 1412.

In this embodiment, the first border 1411 and the second border 1412 extend long in the vertical direction and are formed in a straight line.

The first border 1411 and the second border 1412 may be parallel. The first border 1411 and the second border 1412 may be parallel to the front end 112.

The first border 1411 and the second border 1412 may be disposed at an angle with respect to the vertical direction. The lower ends of the first border 1411 and the second border 1412 are disposed ahead of the upper ends.

In this embodiment, the third border 1413 and the fourth border 1414 are formed as straight lines. Unlike the present embodiment, the third border 1413 and the fourth border 1414 may be formed as curves.

The third border 1413 may be arranged at the same height or lower than the upper border 117c of the first discharge port 117. The fourth border 1414 may be disposed at the same height or higher than the lower border 117d of the first discharge hole 117.

The second slit 1420 is formed to extend long in the vertical direction of the second tower 120. The second slit 1420 may be arranged parallel to the front end 122. The second slit 1420 may be formed to penetrate the second inner wall 125, and the second discharge space 103b and the blowing space 105 may be communicated through the second slit 1420. .

The second slit 1420 is disposed toward the blowing space 105 or the first inner wall 115. The second slit 1420 may be disposed within the height of the second discharge hole 127.

In this embodiment, the longitudinal direction of the second slit 1410 and the longitudinal direction of the second discharge port 127 intersect.

Referring to FIG. 8, the second slit 1420 is disposed on the front end 122 side of the second tower 120 and forms a front edge of the second slit 1420. ) and a second border 1422 disposed on the side of the second discharge port 127 and forming a rear edge of the second slit 1420, and the first border 1421 and the second border 1422 It includes a third border 1423 connecting the upper ends of the and a fourth border 1424 connecting the lower ends of the first border 1421 and the second border 1422.

In this embodiment, the first border 1421 and the second border 1422 extend long in the vertical direction and are formed in a straight line.

The first border 1421 and the second border 1422 may be parallel. The first border 1421 and the second border 1422 may be parallel to the front end 112.

The first border 1421 and the second border 1422 may be disposed at an angle with respect to the vertical direction. The lower ends of the first border 1421 and the second border 1422 are disposed ahead of the upper ends.

In this embodiment, the third border 1423 and the fourth border 1424 are formed as straight lines. Unlike the present embodiment, the third border 1423 and the fourth border 1424 may be formed as curves.

The third border 1423 may be disposed at the same height or lower than the upper border 127c of the second discharge port 127. The fourth border 1424 may be disposed at the same height or higher than the lower border 127d of the second discharge port 127.

In order to open and close the first slit 1410, a first air flow converter 1401 is disposed inside the first tower 110, and in order to open and close the second slit 1420, the second tower 120 ) A second airflow converter 1402 is disposed inside.

The first air flow converter 1401 and the second air flow converter 1402 are left and right symmetrical and have the same configuration. For convenience of explanation, the configuration of the first air flow converter 1401 and the second air flow converter 1402 will be described in a unified manner.

The air flow converter 1400 includes a door 1430, a door actuator that rotates the door 1430, and a door shaft 1450 that forms the rotation center of the door 1430.

If distinction is necessary, the one placed on the first tower is called the first door and the first actuator, and the one placed on the second tower is called the second door and the second actuator.

The door 1430 is disposed inside the towers 110 and 120, and in this embodiment is in close contact with the inner surfaces 115a and 125a of the first inner walls 115 and 125 to form the slit 1410. (1420) can be closed.

When the door 1430 rotates, the slits 1410 and 1420 may be opened, and when the slits 1410 and 1420 are opened, the air in each discharge space 103a and 103b flows into the slit 1410 ( It is discharged to the blowing space (105) through 1420).

At this time, the air discharged from each outlet 117 and 127 and flowing along each inner wall 115 and 125 may interfere with the air discharged from each slit 1410 and 1420, and the inner wall The direction of the airflow flowing along (115)(125) can be changed.

Specifically, when air is discharged through the first slit 1410, the air flowing along the first inner wall 115 may interfere with the air discharged from the first slit 1410 and concentrate toward the center line L-L'. there is.

Similarly, when air is discharged from the second slit 1420, the air flowing along the second inner wall 125 may interfere with the air discharged from the second slit 1420 and be concentrated toward the center line L-L'.

The door 1430 may be formed in a plate shape. The door 1430 may be placed inside the discharge space (103a) (103b) and may be in close contact with the inner surfaces (115a) (125a) of the inner walls (115) (125).

The door 1430 may have a shape corresponding to the inner surfaces 115a and 125a. In this embodiment, the inner surfaces 115a and 125a are curved, and one surface 1432a of the door 1430 may also be formed as a curved surface corresponding to the inner surfaces 115a and 125a.

Since the inner walls 115 and 125 are formed as a curved surface for the Coanda effect, it is preferable that one surface 1432a of the door 1430 is also formed as a curved surface.

The door 1430 is formed to be larger than the area of each slit 1410 (1410) (1420) and can cover the entire slit (1410) (1420). When the door 1430 is in close contact with the slits 1410 and 1420, the slits 1410 and 1420 are preferably closed and the flow of air is blocked.

In this embodiment, the door 1430 is manufactured as one member and covers the entire slits 1410 and 1420.

The door 1430 is rotatably assembled to each tower 110 and 120. The rotation axis of the door 1430 is arranged in the vertical direction.

The door 1430 includes a door body 1432 formed in a plate shape, and connection portions 1434 and 1436 disposed on the door body 1432 and assembled with the first tower 110.

In this embodiment, the door body 1432 has a vertical length that is much longer than the left and right widths.

The door body 1432 has one side 1432a disposed toward the slit, the other side 1432b disposed toward the outer wall 114 and 124 of the tower, and disposed at the front end 112 and 122. It includes a first border (1432c) and a second border (1432d) disposed on the rear end (113) (123) side.

When the door 1430 rotates, the first border 1432c is located ahead of the slits 1410 and 1420. The turning radius of the first border 1432c is smaller than the turning radius of the second border 1432d.

Considering the long length of the door body 1432, two connection parts 1434 and 1436 are arranged at different heights. The connection part disposed on the upper side is referred to as the first connection portion 1434, and the connection portion disposed on the lower side is referred to as the second connection portion 1436. The connection portion 1434 may be disposed on the first border 1432c.

The door shaft 1450 is disposed on each of the first connection part 1434 and the second connection part 1436. In this embodiment, the door shaft 1450 is manufactured as a separate part, passes through the connecting portions 1432 and 1434, and is assembled to the towers 110 and 120.

Unlike this embodiment, the door shaft 1450 may be manufactured integrally with the first connection part 1434 and the second connection part 1436.

A door shaft hole 1435 through which the door shaft 1450 passes may be disposed in each of the connecting portions 1434 and 1436.

In this embodiment, a motor 1440 is used as the actuator. Unlike this embodiment, the actuator may be a hydraulic cylinder or other devices that provide driving force to the door 1430.

A gear assembly 1460 is disposed to transmit the driving force of the motor 1440 to the door 1430. The gear assembly 1460 includes a driving gear 1442 coupled to the motor shaft of the motor 1440, a driven gear 1444 meshed with the driving gear 1442, and coupled to the door shaft 1450. Includes.

The driving gear 1442 and driven gear 1444 are pinion gears. Unlike this embodiment, a rack and pinion may be used as the driving gear 1442 and the driven gear 1444.

Since the door shaft 1450 is disposed upward, the driving gear 1442 and driven gear 1444 are horizontally disposed and rotate in the horizontal direction.

The motor 1440 is coupled to the towers 110 and 120. The motors 1440 may be disposed on the inner surfaces 115a and 125a of the inner walls 115 and 125, respectively.

If distinction is necessary, the motor 1440 disposed in the first tower is referred to as the first motor, and the motor disposed in the second tower is referred to as the second motor.

Additionally, if distinction is necessary, the motor disposed above the first tower is referred to as the first upper motor, and the motor disposed below is referred to as the first lower motor. The motor disposed on the upper side of the second tower is called the second upper motor, and the motor disposed on the lower side is called the second lower motor.

A motor installation portion 1441 where the motor 1440 is installed is disposed on the inner surfaces 115a and 125a. The motor 1440 is fixed to the motor installation part 1441.

In this embodiment, the motor 1440 is disposed on the upper and lower sides of the inside of the tower, respectively, and the motor installation part 1441 is also disposed on the upper and lower sides of the inner surfaces 115a and 125a, respectively.

If distinction is necessary, the motor installation part 1441 arranged on the upper side is called the upper motor installation part 1441a, and the motor installation part 1441 arranged on the lower side is called the lower motor installation part 1441b.

The motor installation portion 1441 may be disposed opposite to a portion of the first border 1432c.

In this embodiment, motors 1440 are disposed on the upper and lower sides, but unlike this embodiment, only one motor may be disposed. In this embodiment, since the vertical length of the door 1430 is long, the motors 1440 are placed on the upper and lower sides, and the vertical twist of the door 1430 can be minimized through each motor 1440. Additionally, when two motors are arranged in the vertical direction, the upper and lower sides of the slits 1410 and 1420 can be opened and closed at the same time, and the delay due to the operation of the motors can be minimized.

Meanwhile, referring to FIGS. 4, 10, and 13, the airflow width due to the Coanda effect will be described in more detail.

The air discharged from the first discharge port 117 may flow to the first front end 112 along the first inner surface 115, and the air discharged from the second discharge port 127 may flow toward the second inner surface 125. It may flow to the second front end 122.

In order to intensively discharge discharged air forward through the Coanda effect, the shortest distance B0 between the first inner wall 115 and the second inner wall 125 can be determined.

As the shortest distance (BO) becomes longer, the Coanda effect becomes weaker, but a wide blowing space (105) can be secured, and as the shortest distance (BO) becomes shorter, the Coanda effect becomes stronger, but the blowing space (105) becomes larger. becomes narrower.

The shortest distance (BO) may be 20 mm to 30 mm, and in this case, an airflow width (left and right width) of 1.2 m can be secured at a distance of 1.5 m in front of the front end 112 (122). In this embodiment, the shortest distance (BO) is set to 27 mm.

Additionally, the discharge angle A of the first inner wall 115 and the second inner wall 125 can be designed to limit the left and right diffusion range of the discharged air.

The discharge angle (A) is defined as the angle between the center line L-L' of the first tower 110 and the second tower 120 and the inner walls 115 and 125. In this embodiment, the angle between the front ends 112 and 122 and the center line L-L' is specified as the discharge angle A.

The discharge angle (A) can be set to 11.5 to 30 degrees, and in this embodiment, the discharge angle (A) is set to 25.5.

Meanwhile, referring to FIGS. 4, 10, and 14, the concentrated air flow using the air flow converter 1400 will be described in more detail.

The air discharged forward when the first slit 1410 and the second slit 1420 are closed is called a wide airflow, and the airflow concentrated at the center line L-L' rather than the wide airflow is called a concentrated airflow.

The concentrated air flow is intended to concentrate the air discharged by the Coanda effect toward the center line L-L' and increase the straight-line distance.

When the first slit 1410 and the second slit 1420 are open, subflow is discharged through the first slit 1410 and the second slit 1420.

Each sub-flow discharged from the first slit 1410 and the second slit 1420 interferes with the main flow discharged from each tow hole 117 and 127. The subflow changes the direction of the airflow by pushing the main flow toward the center line L-L'.

In order to form an effective concentrated airflow, the positions of the first slit 1410 and the second slit 1420 must be determined.

The distance between the front ends 112 and 122 and the slits 1410 and 1420 is referred to as D.

The distance D of the slits 1410 and 1420 spaced apart from the front ends 112 and 122 may be 5 mm to 10 mm. Specifically, the separation length (D) may be the length between the inner surface (410a) of the guide board (410) and the front ends (112) (122), which are in direct contact with the discharge air.

In this embodiment, the separation distance (D) is set to 7 mm.

Referring to FIG. 15, when the first slit 1410 is closed and the second slit 1420 is open, the air flowing along the first inner surface 115 is discharged in the form of a wide airflow, and the second inner surface 1420 is opened. The air flowing along the side 125 is discharged in the form of a concentrated airflow.

In this case, the air discharged through the blowing space 105 can flow biased to the left.

Referring to FIG. 16, when the first slit 1410 is open and the second slit 1420 is closed, the air flowing along the first inner surface 115 is discharged in the form of a concentrated airflow, and the second slit 1420 is closed. The air flowing along the side 125 is discharged in the form of a wide airflow.

In this case, the air discharged through the blowing space 105 can flow biased to the right.

In this way, the air clean fan according to this embodiment can discharge discharge air broadly or narrowly through control of the first air flow converter and the second air flow converter.

Additionally, the air clean fan according to this embodiment can discharge discharge air biased to the left or right through control of the first air flow converter and the second air flow converter without rotating the tower.

A person skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. The scope of the present invention is indicated by the scope of the claims described below rather than the detailed description above, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. must be interpreted.

100: Case 110: First Tower
120: 2nd tower 130: tower base
140: Tower case 150: Base case
200: Filter 300: Fan device
1400: Airflow converter

Claims (20)

A tower formed by extending elongatedly in the vertical direction;
a discharge port disposed at the rear of the tower and extending vertically along the longitudinal direction of the tower;
a slit disposed on the front side of the tower and extending vertically along the longitudinal direction of the tower;
a fan disposed at the bottom of the tower and blowing air upward;
It includes an airflow converter disposed on the tower and opening and closing the slit,
At least a portion of the slit is disposed within the height of the discharge port,
An air clean fan arranged so that the longitudinal direction of the discharge port intersects the longitudinal direction of the slit. delete In claim 1,
The discharge port is an air clean fan disposed in a vertical direction along the rear end of the tower. In claim 1,
The slit is an air clean fan disposed in a vertical direction along the front end of the tower. In claim 1,
The air flow converter includes a door that opens and closes the slit; An air clean fan including an actuator that provides driving force to the door. In claim 5,
An air clean fan in which the door is disposed inside the tower. In claim 5,
The actuator is a motor,
a drive gear disposed on the motor shaft of the motor and transmitting the driving force of the motor to the door; An air clean fan further comprising: a driven gear disposed on the door and meshed with the driving gear. In claim 7,
An air clean fan further comprising a door shaft coupled to the driven gear and rotatably assembled to the tower. In claim 1,
The tower further includes a first tower and a second tower arranged to face each other with a blowing space in between,
The discharge port further includes a first discharge port disposed in the first tower and a second discharge port disposed in the second tower,
The slit further includes a first slit disposed in the first tower and a second slit disposed in the second tower,
The air flow converter further includes a first air flow converter disposed on the first tower and opening and closing the first slit, and a second air flow converter disposed on the second tower and opening and closing the second slit. Air Clean Fan. In claim 9,
An air clean fan in which the first discharge port and the second discharge port are arranged to face each other across the blowing space. In claim 9,
An air clean fan in which the first slit and the second slit are arranged to face each other across the blowing space. In claim 9,
An air clean fan wherein at least a portion of the first slit is disposed within a height of the first discharge port, and at least a portion of the second slit is disposed within a height of the second discharge port. In claim 9,
An air clean fan in which the first discharge port and the second discharge port are arranged in parallel. In claim 9,
An air clean fan in which the first slit and the second slit are arranged in parallel. In claim 9,
An air clean fan arranged so that the longitudinal direction of the first discharge port intersects the longitudinal direction of the first slit. In claim 9,
An air clean fan arranged so that the longitudinal direction of the second discharge port intersects the longitudinal direction of the second slit. In claim 9,
The first discharge port is arranged in a vertical direction along the rear end of the first tower, and the first slit is arranged in a vertical direction along the front end of the first tower,
The second discharge port is arranged in a vertical direction along the rear end of the second tower, and the second slit is arranged in a vertical direction along the front end of the second tower. In claim 9,
The first air flow converter includes a first door that opens and closes the first slit; Includes a first actuator that provides driving force to the first door,
The second air flow converter includes a second door that opens and closes the second slit; An air clean fan including a second actuator that provides driving force to the second door. In claim 18,
The first actuator is a motor,
a driving gear disposed on the motor shaft of the motor and transmitting driving force of the motor to the first door; An air clean fan further comprising a driven gear disposed on the first door and meshed with the driving gear. A first tower extending vertically;
a second tower extending vertically;
a blowing space disposed between the first tower and the second tower;
a first discharge port disposed at a rear side of the first tower;
a first slit disposed on a front side of the first tower;
a second outlet disposed at a rear side of the second tower;
a second slit disposed on a front side of the second tower;
a first airflow converter disposed inside the first tower and driving a first door to open and close the first slit;
A second airflow converter disposed inside the second tower and driving the second door to open and close the second slit,
An air clean fan arranged so that the longitudinal direction of the first discharge port intersects the longitudinal direction of the first slit, and the longitudinal direction of the second discharge port intersects the longitudinal direction of the second slit.

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