Patent Description:
A blower may generate a flow of air to circulate air in an indoor space or to form airflow toward a user. Recently, a lot of researches have been performed on a structure of discharging an air of blower which can provide a user with a sense of comfort.

In this regard, Korean Patent Publication Nos. <CIT>, <CIT>, <CIT>, and <CIT> disclose a fan for blowing air using a blowing device or a Coanda effect.

Meanwhile, a conventional blower is required to have a plurality of motors individually driven or to move or rotate the blower so as to adjust the blowing direction. Thus, there is a problem in that it is difficult to effectively and gradually adjust the blowing direction, or excessive power is consumed.

The document <CIT> discloses a blower having a lower base containing the fan and two towers with slits along their elongated extension for the air to exit, the space between the two towers forming a blowing space.

The document <CIT> discloses a blower with two towers, each containing an elongated fan, two elements for guiding the air that open into the space between the two towers.

An object of the present disclosure is to solve the above and other problems.

Another object of the present disclosure is to provide a blower capable of selectively providing a horizontal airflow or an upward airflow.

Another object of the present disclosure is to provide a blower that provides a forward deflected airflow.

Another object of the present disclosure is to provide a blower in which an area of discharged air is changed without rotation of the entire body.

In order to achieve the above object, a blower according to the embodiment of the present disclosure includes a first tower which has a first discharge port formed in a first wall; a second tower in which a second wall facing the first wall is spaced apart from the first wall, and a second discharge port is formed in the second wall; a fan which is disposed below the first tower and the second tower, and forms an air flow toward each of the first tower and the second tower; a first guide board which is disposed inside the first tower or protrudes from the first wall; a second guide board which is disposed inside the second tower or protrudes from the second wall; a first guide motor for changing a disposition of the first guide board; and a second guide motor for changing a disposition of the second guide board. A blowing space through which air discharged from the first discharge port and the second discharge port flows in one direction is formed between the first wall and the second wall, and each of the first guide board and the second guide board is disposed in a downstream of the blowing space so as to change a wind direction of air flowing from the blowing space, thereby adjusting the wind direction of the air discharged from the blowing space.

The first guide motor disposes the first guide board inside the first tower, or adjusts a height protruding from the first wall, and the second guide motor disposes the second guide board inside the second tower, or adjusts a height protruding from the second wall, thereby adjusting the height of the first guide board and the second guide board protruding toward the blowing space.

The first guide motor and the second guide motor are individually operated, so that the heights of the first guide board and the second guide board protruding to the blowing space may be set differently.

Each of the first wall and the second wall forms a convex curved surface in a facing direction, so that air flowing through the blowing space may flow along the first wall and the second wall.

A width between the first wall and the second wall forms a shortest distance, between a point in which the first discharge port and the second discharge port are formed, and a point in which the first guide board and the second guide board are disposed, so that air flowing through the blowing space may flow along the first wall and the second wall.

Each of a downstream end of the first wall and a downstream end of the second wall forms an inclination angle in a direction away from a virtual center line passing through centers of the first tower and the second tower, so that the air discharged from the blowing space may flow into a wide area.

The first discharge port is opened to allow air discharged from the first discharge port to flow along the first wall, and the second discharge port is opened to allow air discharged from the second discharge port to flow along the second wall, so that air flowing through the blowing space may flow along the first wall and the second wall.

The blower further includes a first board guider which is disposed inside the first tower, and guides a movement of the first guide board, and a second board guide which is disposed inside the second tower, and guides a movement of the second guide board, so that the first guide board and the second guide board can move stably.

Each of the first board guide and the second board guide includes a fixed guider which is fixedly disposed inside the first tower or the second tower; and a movement guider which is connected to the first guide board or the second guide board, and disposed movably in the fixed guider, wherein a rack, which is connected to the first guide motor or the second guide motor and moves the first guide board or the second guide board, is disposed on one surface of the first guide board or the second guide board, and the movement guider is disposed on the other surface of the first guide board or the second guide board, so that the disposition of the first guide board and the second guide board may be changed.

In a horizontal airflow mode in which air is discharged to a front of the blowing space, each of the first guide board and the second guide board is disposed inside the first tower and the second tower, so that air flowing through the blowing space may be discharged forward.

In an upward airflow mode in which air is discharged to an upper side of the blowing space, an end of the first guide board is in contact with an end of the second guide board, so that air flowing through the blowing space may flow upward.

In an one-sided airflow mode in which air discharged from the blowing space forms an one-sided airflow, a length of the first guide board protruding from the first wall is formed to be different from a length of the second guide board protruding from the second wall, so that air flowing through the blowing space may flow to be deflected to one side of the front.

In the one-sided airflow mode, one of the first guide board and the second guide board is disposed to protrude to the blowing space, and the other is disposed not to protrude to the blowing space, so that air flowing through the blowing space may flow to be deflected to one side of the front.

In the one-sided airflow mode, the first guide motor and the second guide motor are operated in such a manner that the first guide board protrudes from the first wall or the second guide board protrudes from the second wall, so that air flowing through the blowing space may flow to be deflected to one side of the front.

In a moving mode in which a wind direction of air discharged from the blowing space is continuously changed, the first guide board and the second guide board are alternately protruded, so that the wind direction of the air flowing forward can be changed continuously.

In the moving mode, when the first guide board protrudes from the first wall, the second guide board is disposed inside the second tower, and when the second guide board protrudes from the second wall, the first guide board is disposed inside the first tower, so that the wind direction of the air can be changed to a wide area ahead.

In the moving mode, when a length of the first guide board protruding from the first wall is changed, the second guide board is disposed inside the second tower, and when a length of the second guide board protruding from the second wall is changed, the first guide board is disposed inside the first tower, so that the wind direction of the air can be changed to a wide area ahead.

In the moving mode, a distance between the first guide board and the second guide board is uniformly maintained, so that the wind direction of the air can be changed to the concentrated area.

In the moving mode, when a length of the first guide board protruding from the first wall increases, a length of the second guide board protruding from the second wall decreases, and when the length of the second guide board protruding from the second wall increases, the length of the first guide board protruding from the first wall decreases, so that the wind direction of the air can be changed to the concentrated area.

Details of other embodiments are included in the detailed description and drawings.

The above and other objects, features and advantages of the present disclosure will be more apparent from the following detailed description in conjunction with the accompanying drawings, in which:.

Advantages and features of the present disclosure, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and these embodiments just make the disclosure of the present disclosure complete, and are provided to completely inform those skilled in the art about the scope of the invention, and the present disclosure is only defined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification.

The direction indications of up (U), down (D), left (Le), right (Ri), front (F), and rear (R) shown in <FIG>, <FIG> and <FIG>, and <FIG> are used for convenience of description and do not limit the scope of the invention. Therefore, when the reference is changed, the above direction may be set differently.

Referring to <FIG>, a blower <NUM> includes a case <NUM> providing an outer shape. The case <NUM> includes a base case <NUM> in which a filter <NUM> is installed, and a tower case <NUM> for discharging air through the Coanda effect.

The tower case <NUM> includes a first tower <NUM> and a second tower <NUM> that are separated and disposed in the form of two columns. The first tower <NUM> is disposed in the right, and the second tower <NUM> is disposed in the left.

The first tower <NUM> and the second tower <NUM> are spaced apart. A blowing space <NUM> is formed between the first tower <NUM> and the second tower <NUM>.

The front, rear, and upper sides of the blowing space <NUM> are opened, and the upper and lower ends of the blowing space <NUM> are formed to have the same distance.

The tower case <NUM> including the first tower, the second tower and the blowing space is formed in a truncated cone shape.

Discharge ports <NUM> and <NUM> respectively disposed in the first tower <NUM> and the second tower <NUM> discharge air to the blowing space <NUM>. A first discharge port <NUM> is formed in the first tower <NUM>, and a second discharge port <NUM> is formed in the second tower <NUM>.

Each of the first discharge port and the second discharge port is formed in each of the first tower <NUM> and the second tower <NUM> at a position where the blowing space is formed. The air discharged through the first discharge port <NUM> or the second discharge port <NUM> may be discharged in a direction crossing the blowing space <NUM>.

Air discharge directions of the air discharged through the first tower <NUM> and the second tower <NUM> may be formed in a front-rear direction and an up-down direction.

Referring to <FIG>, the air discharge direction crossing the blowing space <NUM> may include a first air discharge direction S1 disposed in a horizontal direction and a second air discharge direction S2 formed in a vertical direction.

Air flowing in the first air discharge direction S1 may be defined as a horizontal airflow, and air flowing in the second air discharge direction S2 may be defined as an upward airflow.

The horizontal airflow means that the main air flow direction is a horizontal direction, and may mean that the flow rate of the air flowing in the horizontal direction is increased. Similarly, the upward airflow means that the main air flow direction is an upward direction, and may mean that the flow rate of the air flowing in the upward direction is increased.

The upper distance and the lower distance of the blowing space <NUM> may be formed to be the same. The upper distance of the blowing space <NUM> may mean a distance between a upper end part of the first tower <NUM> and a upper end part of the second tower <NUM>. The lower distance of the blowing space <NUM> may mean a distance between a lower end part of the first tower <NUM> and a lower end part of the second tower <NUM>. However, unlike the present embodiment, the upper distance of the blowing space <NUM> may be formed to be narrower or wider than the lower distance.

By forming the left and right widths of the blowing space <NUM> to be uniform, the flow of air flowing in the front side of the blowing space may be formed more uniformly.

For example, when the width of the upper side and the width of the lower side are different, the flow velocity of the wider side may be formed low, and a deviation of velocity may occur based on the vertical direction. When the air velocity deviation occurs with respect to the vertical direction, the reaching length of the discharge air may vary.

The air discharged from the first discharge port and the second discharge port may be joined in the blowing space <NUM>, and then flow.

That is, the discharge air of the first discharge port <NUM> and the discharge air of the second discharge port <NUM> are not individually flowed to the user, but the discharge air of the first discharge port <NUM> and the discharge air of the second discharge port <NUM> may be joined in the blowing space <NUM>, and then flow forward or upward.

The blowing space <NUM> may be used as a space in which discharge airs are joined and mixed. In addition, the air in the rear side of the blowing space may also flow to the blowing space by the discharge air discharged to the blowing space <NUM>.

The discharge air from the first discharge port <NUM> and the discharge air from the second discharge port <NUM> are joined in the blowing space, thereby improving the straightness of the discharge air. In addition, by joining the discharge air of the first discharge port <NUM> and the discharge air of the second discharge port <NUM> in the blowing space, the air around the first and second towers may also indirectly flow in the air discharge direction.

Referring to <FIG>, a first air discharge direction S1 is formed from the rear to the front, and a second air discharge direction S2 is formed from the lower side to the upper side.

Referring to <FIG>, an upper end <NUM> of the first tower <NUM> and an upper end <NUM> of the second tower <NUM> are spaced apart for the second air discharge direction S2. That is, the air discharged in the second air discharge direction S2 does not interfere with the case of the blower <NUM>.

Referring to <FIG>, for the first air discharge direction S1, a front end <NUM> of the first tower <NUM> and a front end <NUM> of the second tower <NUM> are spaced apart, and a rear end <NUM> of the first tower <NUM> and a rear end <NUM> of the second tower <NUM> are also spaced apart.

A wall of the first tower <NUM> and the second tower <NUM> facing the blowing space <NUM> is referred to as an inner wall, and a wall not facing the blowing space <NUM> is referred to as an outer wall.

Referring to <FIG>, an outer wall <NUM> of the first tower <NUM> and an outer wall <NUM> of the second tower <NUM> are disposed in the opposite direction. The inner wall (or a first wall <NUM>) of the first tower <NUM> and the inner wall (or a second wall <NUM>) of the second tower <NUM> are disposed to face each other.

The first inner wall <NUM> is formed to be convex toward the second tower, and the second inner wall <NUM> is formed to be convex toward the first tower.

The first tower <NUM> and the second tower <NUM> are formed in a streamlined shape with respect to the flow direction of air.

Specifically, the first inner wall <NUM> and the first outer wall <NUM> are formed in a streamline shape with respect to the front-rear direction, and the second inner wall <NUM> and the second outer wall <NUM> are formed in a streamline shape with respect to the front-rear direction.

Referring to <FIG>, the first discharge port <NUM> is disposed in the first inner wall <NUM>, and the second discharge port <NUM> is disposed in the second inner wall <NUM>.

The first inner wall <NUM> and the second inner wall <NUM> are spaced apart by the shortest distance B0 at a central portion 115a of the first inner wall <NUM> and a central portion 125a of the second inner wall <NUM>. The central portion 115a of the first inner wall <NUM> may be an area located between the front end <NUM> and the rear end <NUM> of the first inner wall <NUM>. Similarly, the central portion 125a of the second inner wall <NUM> may be an area located between the front end <NUM> and the rear end <NUM> of the second inner wall <NUM>. Each of the first discharge port <NUM> and the second discharge port <NUM> is disposed in a rear side of the central portion 115a of the first inner wall <NUM> and the central portion 125a of the second inner wall <NUM>. That is, the first discharge port <NUM> is disposed between the central portion 115a and the rear end <NUM> of the first inner wall <NUM>. The second discharge port <NUM> is disposed between the central portion 125a and the rear end <NUM> of the second inner wall <NUM>.

The spaced distance between the front end <NUM> of the first tower <NUM> and the front end <NUM> of the second tower <NUM> is referred to as a first spaced distance B1. The spaced distance between the rear end <NUM> of the first tower <NUM> and the rear end <NUM> of the second tower <NUM> is referred to as a second spaced distance B2.

The first spaced distance B1 and the second spaced distance B2 are formed longer than the shortest distance B0. The first spaced distance B1 and the second spaced distance B2 may have the same length, or may be formed differently.

As the discharge port <NUM>, <NUM> is disposed closer to the rear end <NUM>, <NUM>, it is easier to control airflow through the Coanda effect described later.

The inner wall <NUM> of the first tower <NUM> and the inner wall <NUM> of the second tower <NUM> directly provide the Coanda effect, and the outer wall <NUM> of the first tower <NUM> and the outer wall <NUM> of second tower <NUM> may indirectly provide the Coanda effect.

The inner wall <NUM>, <NUM> directly guides the air discharged from the discharge port <NUM>, <NUM> to the front end <NUM>, <NUM>. That is, the inner wall <NUM>, <NUM> directly provides a horizontal airflow of the air discharged from the discharge port <NUM>, <NUM>.

Due to the air flow in the blowing space <NUM>, indirect air flow occurs in the outer wall <NUM>, <NUM> as well.

The outer wall <NUM>, <NUM> induces a Coanda effect with respect to the indirect air flow, and guides the indirect air flow to the front end <NUM>, <NUM>.

The left side of the blowing space is blocked by the first inner wall <NUM>, and the right side of the blowing space is blocked by the second inner wall <NUM>, but the upper side of the blowing space <NUM> is opened.

An air flow converter described later may convert the horizontal airflow passing through the blowing space into an upward airflow, and the upward airflow may flow to the open upper side of the blowing space. The upward airflow may suppress the direct flow of discharge air to a user, and may actively convect the indoor air.

In addition, the width of the discharge air may be adjusted through the flow rate of the air joined in the blowing space.

By forming the vertical length of the first discharge port <NUM> and the second discharge port <NUM> to be much longer than the left and right widths B0, B1, B2 of the blowing space, the discharge air of the first discharge port and the discharge air of the second discharge port may be induced to join in the blowing space.

Referring to <FIG>, the case <NUM> of the blower <NUM> includes a base case <NUM> in which a filter is detachably installed, and a tower case <NUM> that is disposed above the base case <NUM>, and supported by the base case <NUM>.

The tower case <NUM> includes a first tower <NUM> and a second tower <NUM>.

A tower base <NUM> connecting the first tower <NUM> and the second tower <NUM> is disposed, and the tower base <NUM> is assembled to the base case <NUM>. The tower base <NUM> may be manufactured integrally with the first tower <NUM> and the second tower <NUM>.

Unlike the present embodiment, the first tower <NUM> and the second tower <NUM> may be directly assembled to the base case <NUM> without the tower base <NUM> or may be manufactured integrally with the base case <NUM>.

The base case <NUM> forms the lower portion of the blower <NUM>, and the tower case <NUM> forms the upper portion of the blower <NUM>.

The blower <NUM> may suck ambient air from the base case <NUM> and discharge the air filtered in the tower case <NUM>. The tower case <NUM> may discharge air from a position higher than the base case <NUM>.

The blower <NUM> may have a pillar shape whose diameter decreases toward the upper portion. The blower <NUM> may have a conical or truncated cone shape as a whole.

Unlike the present embodiment, the blower <NUM> may include all forms of two towers disposed. In addition, unlike the present embodiment, it is not necessary to have a shape whose cross section becomes narrower toward the upper side.

However, as in the present embodiment, when the cross section becomes narrower toward the upper side, the center of gravity is lowered and the risk of overturning due to external force is reduced.

For convenience of assembly, in the present embodiment, the base case <NUM> and the tower case <NUM> may be separated and manufactured. Unlike the present embodiment, the base case <NUM> and the tower case <NUM> may be integrally formed. For example, the base case and the tower case may be manufactured in the form of a front case and a rear case which are integrally manufactured, and then assembled.

The base case <NUM> is formed to gradually decrease in diameter toward the upper side. The tower case <NUM> is also formed to gradually decrease in diameter toward the upper side.

The outer surfaces of the base case <NUM> and the tower case <NUM> may be formed to be continuous. In particular, the lower end of the tower base <NUM> and the upper end of the base case <NUM> are in close contact, and the outer surface of the tower base <NUM> and the outer surface of the base case <NUM> may form a continuous surface.

To this end, the lower end diameter of the tower base <NUM> may be the same as or slightly smaller than the upper end diameter of the base case <NUM>.

The tower base <NUM> distributes air supplied from the base case <NUM> and provides the distributed air to the first tower <NUM> and the second tower <NUM>.

The tower base <NUM> connects the first tower <NUM> and the second tower <NUM>. The blowing space <NUM> is disposed above the tower base <NUM>.

In addition, the discharge port <NUM>, <NUM> is disposed in the upper side of the tower base <NUM>, and an upward airflow and a horizontal airflow are formed in the upper side of the tower base <NUM>.

In order to minimize friction with air, the upper surface <NUM> of the tower base <NUM> is formed as a curved surface. In particular, the upper surface is formed as a curved surface concave downward, and is formed to extend in the front-rear direction. Referring to <FIG>, one side 131a of the upper surface <NUM> is connected to the first inner wall <NUM>, and the other side 131b of the upper surface <NUM> is connected to the second inner wall <NUM>.

Referring to <FIG>, when viewed as a top view, the first tower <NUM> and the second tower <NUM> are vertically symmetrical with respect to the center line L-L'. In particular, the first discharge port <NUM> and the second discharge port <NUM> are disposed to be vertically symmetrical with respect to the center line L-L'.

The center line L-L' is a virtual line between the first tower <NUM> and the second tower <NUM>, and is disposed in the front-rear direction in the present embodiment, and is disposed to pass through the upper surface <NUM>.

Unlike the present embodiment, the first tower <NUM> and the second tower <NUM> may be formed in an asymmetric shape. However, it is more advantageous in controlling the horizontal airflow and the upward airflow that the first tower <NUM> and the second tower <NUM> are disposed symmetrically with respect to the center line L-L'.

Referring to <FIG>, <FIG>, or <FIG>, the blower <NUM> includes a filter <NUM> disposed inside the case <NUM>, and a fan device <NUM> which is disposed inside the case <NUM> and flows air to the discharge port <NUM>, <NUM>.

The filter <NUM> and the fan device <NUM> are disposed inside the base case <NUM>. The base case <NUM> is formed in a truncated cone shape, and the upper side is opened.

Referring to <FIG>, the base case <NUM> includes a base <NUM> seated on the ground, and a base outer <NUM> that is coupled to the upper side of the base <NUM>, has a space formed therein, and has a suction port <NUM>.

The base <NUM> may be formed in a circular shape.

The base outer <NUM> is formed in a truncated cone shape having open upper and lower sides. Referring to <FIG>, a part of the side surface of the base outer <NUM> is opened. The open portion of the base outer <NUM> is referred to as a filter insertion port <NUM>.

Referring to <FIG>, the case <NUM> further includes a cover <NUM> that blocks the filter insertion port <NUM>. The cover <NUM> may be assembled to be detachable from the base outer <NUM> and the filter <NUM> may be hold in or assembled to the cover <NUM>.

The user may separate the cover <NUM> and take the filter <NUM> out of the case <NUM>.

The suction port <NUM> may be formed in at least one of the base outer <NUM> and the cover <NUM>. The suction port <NUM> is formed in both the base outer <NUM> and the cover <NUM>, and may suck air from all directions <NUM> around the case <NUM>.

The suction port <NUM> is formed in a hole shape, and the shape of the suction port <NUM> may be variously formed.

The filter <NUM> is formed in a cylindrical shape having a vertical hollow formed therein. The outer surface of the filter <NUM> is disposed to face the suction port <NUM> formed in the base outer <NUM> or the cover <NUM>.

The indoor air passes through to flow from the outside of the filter <NUM> to the inside, and in this process, foreign substances or harmful gases in the air may be removed.

The fan device <NUM> is disposed above the filter <NUM>. The fan device <NUM> may flow the air that passed through the filter <NUM> to the first tower <NUM> and the second tower <NUM>.

Referring to <FIG>, the fan device <NUM> includes a fan motor <NUM> and a fan <NUM> rotated by the fan motor <NUM>, and is disposed inside the base case <NUM>.

The fan motor <NUM> is disposed above the fan <NUM>, and a motor shaft of the fan motor <NUM> is coupled to the fan <NUM> disposed in the lower side. A motor housing <NUM> in which the fan motor <NUM> is installed is disposed above the fan <NUM>.

The motor housing <NUM> has a shape surrounding the entire fan motor <NUM>. Since the motor housing <NUM> surrounds the entire fan motor <NUM>, it is possible to reduce the flow resistance with the air flowing from the lower side to the upper side.

Unlike the present embodiment, the motor housing <NUM> may be formed in a shape surrounding only the lower portion of the fan motor <NUM>.

The motor housing <NUM> includes a lower motor housing <NUM> and an upper motor housing <NUM>. At least one of the lower motor housing <NUM> and the upper motor housing <NUM> is coupled to the case <NUM>.

After the fan motor <NUM> is installed in the upper side of the lower motor housing <NUM>, the upper motor housing <NUM> may be covered to surround the fan motor <NUM>. The motor shaft of the fan motor <NUM> passes through the lower motor housing <NUM>, and is assembled to the fan <NUM> disposed in the lower side.

The fan <NUM> 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.

After the air that passed through the filter <NUM> is sucked into the shroud, it is pressurized and flowed by the rotating blade. The hub is disposed in the upper side of the blade, and the shroud is disposed in the lower side of the blade. The hub may be formed in a bowl shape concave downward, and the lower side of the lower motor housing <NUM> may be partially inserted.

The fan <NUM> is a mixed flow fan. The mixed flow fan sucks air into an axial center and discharges air in a radial direction, and the discharged air may be formed to be inclined with respect to the axial direction.

Since the entire air flow flows from the lower side to the upper side, when air is discharged in the radial direction like a general centrifugal fan, a large flow loss occurs due to the change of the flow direction.

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

Referring to <FIG>, a diffuser <NUM> may be further disposed above the fan <NUM>. The diffuser <NUM> guides the air flow caused by the fan <NUM> in the upward direction. The diffuser <NUM> may further reduce a radial direction component from the air flow and enhance the upward direction air flow component.

The motor housing <NUM> is disposed between the diffuser <NUM> and the fan <NUM>.

In order to minimize the vertical installation height of the motor housing, the lower end of the motor housing <NUM> is disposed to be inserted into the fan <NUM>. The lower end of the motor housing <NUM> is disposed to overlap the fan <NUM> in the vertical direction. In addition, the upper end of the motor housing <NUM> may be disposed to be inserted into the diffuser <NUM>. The upper end of the motor housing <NUM> may be disposed to overlap the diffuser <NUM> in the vertical direction.

The lower end of the motor housing <NUM> is disposed higher than the lower end of the fan <NUM>, and the upper end of the motor housing <NUM> is disposed lower than the upper end of the diffuser <NUM>.

In order to optimize the installation position of the motor housing <NUM>, the upper side of the motor housing <NUM> may be disposed inside the tower base <NUM>, and the lower side of the motor housing <NUM> may be disposed inside the base case <NUM>. Unlike the present embodiment, the motor housing <NUM> may be disposed inside the tower base <NUM> or the base case <NUM>.

Referring to <FIG>, a suction grill <NUM> may be disposed inside the base case <NUM>. When the filter <NUM> is separated, the suction grill <NUM> blocks user's finger from invading the fan <NUM> and, thus, protects the user and the fan <NUM>.

The filter <NUM> is disposed in the lower side of the suction grill <NUM> and the fan <NUM> is disposed in the upper side. The suction grill <NUM> has a plurality of through holes formed in the vertical direction so that air can flow.

Referring to <FIG>, inside the case <NUM>, a filter installation space <NUM> in which a filter <NUM> is disposed is formed in a space below the suction grill <NUM>. Referring to <FIG>, inside the case <NUM>, a flow space <NUM> through which air flows between the suction grill <NUM> and the discharge port <NUM>, <NUM> is formed. Referring to <FIG>, inside the first tower <NUM> and the second tower <NUM>, a discharge space <NUM> is formed so that an upward air flow is formed and air flows to the first discharge port <NUM> or the second discharge port <NUM>. Here, the flow space <NUM> may include the discharge space <NUM>.

The indoor air is introduced into the filter installation space <NUM> through the suction port <NUM> and then discharged to the discharge port <NUM>, <NUM> through the flow space <NUM> and the discharge space <NUM>.

Referring to <FIG>, an air guide <NUM> for converting the flow direction of air into a horizontal direction is disposed in the discharge space <NUM>. A plurality of air guides <NUM> may be disposed.

The air guide <NUM> converts the direction of the air flowing from the lower side to the upper side into a horizontal direction. The air guide <NUM> may guide air flowing upward in a direction in which the first discharge port <NUM> or the second discharge port <NUM> is formed.

The air guide <NUM> may include a first air guide <NUM> disposed inside the first tower <NUM> and a second air guide <NUM> disposed inside the second tower <NUM>.

Referring to <FIG>, the first air guide <NUM> may be coupled to an inner wall and/or an outer wall of the first tower <NUM>. The first air guide <NUM> may be disposed in such a manner that a front side end 161a is close to the first discharge port <NUM> and a rear side end 161b is spaced apart from the rear end of the first tower <NUM>.

In order to guide the air flowing from the lower side to the first discharge port <NUM>, the first air guide <NUM> is formed in a convex curved surface from the lower side to the upper side, and the rear side end 161b is disposed lower than the front side end 161a.

Referring to <FIG>, at least a portion of a left side end 161c of the first air guide <NUM> may be in close contact with or coupled to the left wall of the first tower <NUM>. At least a portion of a right side end 161d of the first air guide <NUM> may be in close contact with or coupled to the right wall of the first tower <NUM>.

Accordingly, the air moving upward along the discharge space <NUM> flows from the rear end of the first air guide <NUM> to the front end.

The second air guide <NUM> is disposed vertically symmetrical with the first air guide <NUM>.

Referring to <FIG>, the second air guide <NUM> may be coupled to an inner wall and/or an outer wall of the second tower <NUM>. Referring to <FIG>, a front side end 162a of the second air guide <NUM> is close to the second discharge port <NUM>, and a rear side end 162b is spaced apart from the rear end of the second tower <NUM>.

In order to guide the air flowing from the lower side to the second discharge port <NUM>, the second air guide <NUM> is formed in a convex curved surface from the lower side to the upper side, and the rear side end 162b is disposed lower than the front side end 162a.

Referring to <FIG>, at least a portion of a left side end 162c of the second air guide <NUM> may be in close contact with or coupled to the left wall of the second tower <NUM>. At least a portion of a right side end 162d of the second air guide <NUM> may be in close contact with or coupled to the right wall of the first tower <NUM>.

Next, referring to <FIG> or <FIG>, the first discharge port <NUM> and the second discharge port <NUM> are disposed to extend long in the vertical direction.

The first discharge port <NUM> is disposed between the front end <NUM> and the rear end <NUM> of the first tower <NUM>. The first discharge port <NUM> is disposed closer to the rear end <NUM> than the front end <NUM>. The air discharged from the first discharge port <NUM> may flow along the first inner wall <NUM> due to the Coanda effect. The air flowing along the first inner wall <NUM> may flow toward the front end <NUM>.

Referring to <FIG>, the first discharge port <NUM> includes a first border 117a forming an edge of the air discharge side (the front end in the present embodiment), a second border 117b forming an edge of the opposite side (the rear end in the present embodiment) to the air discharge side, an upper border 117c forming an upper edge of the first discharge port <NUM>, and a lower border 117d forming a lower edge of the first discharge port <NUM>.

Referring to <FIG>, the first border 117a and the second border 117b are disposed parallel to each other. The upper border 117c and the lower border 117d may be disposed parallel to each other.

Referring to <FIG>, the first border 117a and the second border 117b are disposed to be inclined with respect to the vertical direction V. In addition, the rear end <NUM> of the first tower <NUM> is also disposed to be inclined with respect to the vertical direction V.

The inclination a1 of the discharge port <NUM> may be greater than the inclination a2 of the outer surface of the tower. Referring to <FIG>, the inclination a1 of the first border 117a and the second border 117b with respect to the vertical direction V may be formed to be <NUM> degrees, and the inclination a2 of the rear end <NUM> may be formed to be <NUM> degrees.

The second discharge port <NUM> may be formed vertically symmetrical with the first discharge port <NUM>.

Referring to <FIG>, the second discharge port <NUM> includes a first border 127a forming an edge of the air discharge side (the front end in the present embodiment), a second border 127b forming an edge of the opposite side (the rear end in the present embodiment) to the air discharge side, an upper border 127c forming an upper edge of the second discharge port <NUM>, and a lower border 127d forming a lower edge of the second discharge port <NUM>.

Referring to <FIG>, the first discharge port <NUM> of the first tower <NUM> is disposed toward the second tower <NUM>, and the second discharge port <NUM> of the second tower <NUM> is disposed toward the first tower <NUM>.

The air discharged from the first discharge port <NUM> flows along the inner wall <NUM> of the first tower <NUM> through the Coanda effect. The air discharged from the second discharge port <NUM> flows along the inner wall <NUM> of the second tower <NUM> through the Coanda effect.

The blower <NUM> further includes a first discharge case <NUM> and a second discharge case <NUM>.

Referring to <FIG>, the first discharge port <NUM> is formed in the first discharge case <NUM>. The first discharge case <NUM> may be assembled to the first tower <NUM>. The second discharge port <NUM> is formed in the second discharge case <NUM>. The second discharge case <NUM> may be assembled to the second tower <NUM>.

The first discharge case <NUM> may be installed to penetrate the inner wall <NUM> of the first tower <NUM>. The second discharge case <NUM> may be installed to penetrate the inner wall <NUM> of the second tower <NUM>.

The first discharge case <NUM> having a first discharge opening <NUM> is disposed in the first tower <NUM>, and the second discharge case <NUM> having a second discharge opening <NUM> is disposed in the second tower <NUM>.

Referring to <FIG>, the first discharge case <NUM> includes a first discharge guide <NUM> which forms a first discharge port <NUM>, and is disposed in the air discharge side of the first discharge port <NUM>, and a second discharge guide <NUM> which forms a first discharge port <NUM>, and is disposed in the opposite side of the air discharge side of the first discharge port <NUM>.

Referring to <FIG>, outer surfaces 172a and 174a of the first discharge guide <NUM> and the second discharge guide <NUM> provide some of the inner wall <NUM> of the first tower <NUM>.

The inner side of the first discharge guide <NUM> is disposed toward the first discharge space 103a, and the outer side of the first discharge guide <NUM> is disposed toward the blowing space <NUM>. The inner side of the second discharge guide <NUM> is disposed toward the first discharge space 103a, and the outside of the second discharge guide <NUM> is disposed toward the blowing space <NUM>.

The outer surface 172a of the first discharge guide <NUM> may be formed in a curved surface. The outer surface 172a of the first discharge guide <NUM> may provide a surface continuous to the first inner wall <NUM>. The outer surface 172a of the first discharge guide <NUM> forms a curved surface continuous to the outer surface of the first inner wall <NUM>.

The outer surface 174a of the second discharge guide <NUM> may provide a surface continuous to the first inner wall <NUM>. The inner surface 174b of the second discharge guide <NUM> may be formed as a curved surface. The inner surface 174b of the second discharge guide <NUM> may form a curved surface continuous to the inner surface of the first outer wall <NUM>, and thus, guide the air in the first discharge space 103a to the first discharge guide <NUM> side.

The first discharge port <NUM> is formed between the first discharge guide <NUM> and the second discharge guide <NUM>, and the air in the first discharge space 103a is discharged to the blowing space <NUM> through the first discharge port <NUM>.

The air in the first discharge space 103a is discharged between the outer surface 172a of the first discharge guide <NUM> and the inner surface 174b of the second discharge guide <NUM>. A discharge channel <NUM> through which air is discharged is formed between the outer surface 172a of the first discharge guide <NUM> and the inner surface 174b of the second discharge guide <NUM>.

In the discharge channel <NUM>, the width of a middle portion 175b is formed narrower in comparison with an inlet 175a and an outlet 175c. The middle portion 175b may be defined as a portion in which the second border 117b and the outer surface 172a of the first discharge guide <NUM> form the shortest distance.

Referring to <FIG>, the cross-sectional area gradually narrows from the inlet of the discharge channel <NUM> to the middle portion 175b, and the cross-sectional area may be widened again from the middle portion 175b to the outlet 175c. The middle portion 175b is located inside the first tower <NUM>. When viewed from the outside, the outlet 175c of the discharge channel <NUM> may be seen as the discharge port <NUM>.

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

The center of curvature of the outer surface 172a of the first discharge guide <NUM> is located in front of the outer surface 172a, and may be formed inside the first discharge space 103a. The center of curvature of the inner surface 174b of the second discharge guide <NUM> is located in the first discharge guide <NUM> side and is formed inside the first discharge space 103a.

Referring to <FIG>, the second discharge case <NUM> includes a first discharge guide <NUM> which forms a second discharge port <NUM> and is disposed in the air discharge side of the second discharge port <NUM>, and a second discharge guide <NUM> which forms the second discharge port <NUM> and is disposed in the opposite side of the air discharge side of the second discharge port <NUM>.

A discharge channel <NUM> is formed between the first discharge guide <NUM> and the second discharge guide <NUM>.

Since the second discharge case <NUM> is vertically symmetrical with the first discharge case <NUM>, a detailed description will be omitted.

Meanwhile, with reference to <FIG>, <FIG>, <FIG>, and <FIG>, the airflow width due to the Coanda effect will be described in more detail.

Referring to <FIG>, the air discharged from the first discharge port <NUM> may flow to the first front end <NUM> along the first inner surface <NUM>, and the air discharged from the second discharge port <NUM> may flow to the second front end <NUM> along the second inner surface <NUM>.

The shortest distance B0 of the first inner wall <NUM> and the second inner wall <NUM> may be determined in order to intensively discharge the discharge air forward through the Coanda effect.

As the shortest distance B0 is increased, the Coanda effect becomes weaker, but a wider blowing space <NUM> can be secured, and as the shortest distance B0 is decreased, the Coanda effect becomes stronger, but the blowing space <NUM> becomes narrow.

The shortest distance B0, ranging from <NUM> to <NUM>, may be formed, and in this case, the airflow width (left and right width) of <NUM> can be secured at a distance of <NUM> in front of the front end <NUM>, <NUM>.

In addition, the discharge angle A of the first inner wall <NUM> and the second inner wall <NUM> may be designed to limit the left and right diffusion range of discharge air.

Referring to <FIG>, the discharge angle A may be defined as an angle between the center line L-L' of the first tower <NUM> and the second tower <NUM> and the tangent line formed at the front end <NUM>, <NUM> of the inner wall <NUM>, <NUM>.

Referring to <FIG>, it can be seen that as the discharge angle A becomes smaller, the airflow width (left and right direction) of the discharge air becomes narrow, and as the discharge angle A becomes larger, the airflow width of the discharge air becomes wider.

The discharge angle A may be set, ranging from <NUM> degrees to <NUM> degrees. When the discharge angle A is less than <NUM> degrees, the airflow width of the discharge air may be very narrow, and when the discharge angle A exceeds <NUM> degrees, it may be difficult to form a concentrated airflow in the discharge area.

Meanwhile, the blower <NUM> may further include an air flow converter <NUM> that converts the air flow direction of the blowing space <NUM>.

Hereinafter, the air flow converter <NUM> capable of forming an upward airflow will be described with reference to <FIG>, and <FIG>.

The air flow converter <NUM> may convert the horizontal airflow flowing through the blowing space <NUM> into an upward airflow.

Referring to <FIG>, the air flow converter <NUM> includes a first air flow converter <NUM> disposed in the first tower <NUM> and a second air flow converter <NUM> disposed in the second tower <NUM>. The first air flow converter <NUM> and the second air flow converter <NUM> are vertically symmetrical, and may have the same configuration.

The air flow converter <NUM> includes a guide board <NUM> which is disposed in the tower and protrudes to the blowing space <NUM>, a guide motor <NUM> which provides a driving force for the movement of the guide board <NUM>, a gear device <NUM> which provides a driving force of the guide motor <NUM> to the guide board <NUM>, and a board guider <NUM> which is disposed inside the tower and guides the movement of the guide board <NUM>.

The guide board <NUM> may be concealed inside the tower or may protrude to the blowing space <NUM>.

The air flowing through the blowing space <NUM> flows from the first discharge port <NUM> or the second discharge port <NUM> to the front of the blowing space <NUM>. That is, based on the blowing space <NUM>, a portion in which the first discharge port <NUM> and the second discharge port <NUM> are disposed may be set to upstream of the blowing space <NUM>, and a portion in which the first guide board <NUM> and the second guide board <NUM> are disposed may be set to downstream of the blowing space <NUM>.

Referring to <FIG>, the guide board <NUM> includes a first guide board <NUM> disposed in the first tower <NUM> and a second guide board <NUM> disposed in the second tower <NUM>.

The first guide board <NUM> is disposed inside the first tower <NUM> and may selectively protrude to the blowing space <NUM>. The second guide board <NUM> is disposed inside the second tower <NUM> and may selectively protrude to the blowing space <NUM>.

A first board slit <NUM> is formed in the inner wall <NUM> of the first tower <NUM> and a second board slit <NUM> is formed in the inner wall <NUM> of the second tower <NUM>.

The first board slit <NUM> and the second board slit <NUM> are disposed to be vertically symmetrical. The first board slit <NUM> and the second board slit <NUM> are formed to extend long in the vertical direction. The first board slit <NUM> and the second board slit <NUM> may be disposed to be inclined with respect to the vertical direction V.

The inner end 411a of the first guide board <NUM> may be exposed to the first board slit <NUM>, and the inner end 412a of the second guide board <NUM> may be exposed to the second board slit <NUM>.

When the first guide board <NUM> is disposed inside the first tower <NUM>, the inner end 411a of the first guide board <NUM> may be disposed not to protrude from the inner wall <NUM>. When the second guide board <NUM> is disposed inside the second tower <NUM>, the inner end 412a of the second guide board <NUM> may be disposed not to protrude from the inner wall <NUM>.

Each of the first board slit <NUM> and the second boss slit <NUM> may be disposed to be more inclined than the front end <NUM> of the first tower <NUM> or the front end <NUM> of the second tower <NUM> based on the vertical direction.

For example, the front end <NUM> of the first tower <NUM> may be formed with an inclination of <NUM> degrees, and the first board slit <NUM> may be formed with an inclination of <NUM> degrees. Similarly, the front end <NUM> of the second tower <NUM> may be formed with an inclination of <NUM> degrees, and the second board slit <NUM> may be formed with an inclination of <NUM> degrees.

The first guide board <NUM> is disposed parallel to the first board slit <NUM>, and the second guide board <NUM> is disposed parallel to the second board slit <NUM>.

The guide board <NUM> may be formed in a flat or curved plate shape. The guide board <NUM> may be formed to extend long in the vertical direction, and may be disposed in front of the blowing space <NUM>.

The guide board <NUM> may block the horizontal airflow flowing to the blowing space <NUM> and change the direction upward.

The inner end 411a of the first guide board <NUM> and the inner end 412a of the second guide board <NUM> are in contact with or close to each other to form an upward airflow. Unlike the present embodiment, one guide board <NUM> may be in close contact with the opposite tower to form an upward airflow.

As shown in <FIG>, when the blower <NUM> forms a horizontal airflow, the inner end 411a of the first guide board <NUM> may close the first board slit <NUM>, and the inner end 412a of the second guide board <NUM> may close the second board slit <NUM>.

As shown in <FIG>, when the blower <NUM> forms an upward airflow, the inner end 411a of the first guide board <NUM> passes through the first board slit <NUM> and protrudes to the blowing space <NUM>, and the inner end 412a of the second guide board <NUM> may pass through the second board slit <NUM> and protrude to the blowing space <NUM>.

As the first guide board <NUM> closes the first board slit <NUM>, it is possible to prevent air in the first discharge space 103a from leaking to the first board slit <NUM>. As the second guide board <NUM> closes the second board slit <NUM>, it is possible to prevent air in the second discharge space 103b from leaking to the second board slit <NUM>.

The first guide board <NUM> and the second guide board <NUM> protrude to the blowing space <NUM> by a rotating operation. Unlike the present embodiment, at least one of the first guide board <NUM> and the second guide board <NUM> may linearly move in a slide manner to protrude to the blowing space <NUM>.

Referring to <FIG>, the first guide board <NUM> and the second guide board <NUM> are formed in an arc shape. The first guide board <NUM> and the second guide board <NUM> form a certain radius of curvature, and a center of curvature may be located in the blowing space <NUM>.

The guide board <NUM> may be formed of a transparent material. Referring to <FIG>, a light emitting member <NUM> such as an LED may be disposed in the guide board <NUM>, and the entire guide board <NUM> may be emitted through light generated from the light emitting member <NUM>. The light emitting member <NUM> may be disposed in the discharge space <NUM> inside the tower, and may be disposed in the outer end 412b of the guide board <NUM>.

A plurality of light emitting members <NUM> may be disposed along the length direction of the guide board <NUM>.

Referring to <FIG>, the guide motor <NUM> includes a first guide motor <NUM> providing rotational force to the first guide board <NUM> and a second guide motor <NUM> providing rotational force to the second guide board <NUM>.

Referring to <FIG>, the second guide motor <NUM> may include an upper second guide motor 422a disposed in an upper portion of the second guide board <NUM>, and a lower second guide motor 422b disposed in a lower portion of the second guide board <NUM>.

Similarly, the first guide motor <NUM> may include an upper first guide motor <NUM> and a lower first guide motor <NUM>.

The rotation shafts of the first guide motor <NUM> and the second guide motor <NUM> are disposed in a vertical direction, and a rack-pinion structure is used to transmit the driving force.

Referring to <FIG>, the gear device <NUM> includes a driving gear <NUM> coupled to the motor shaft of the guide motor <NUM> and a rack <NUM> coupled to the guide board <NUM>.

The driving gear <NUM> is a pinion gear and is rotated in the horizontal direction.

Referring to <FIG>, the rack <NUM> is coupled to the inner surface of the guide board <NUM>. The rack <NUM> may be formed in a shape corresponding to the guide board <NUM>. The rack <NUM> is formed in an arc shape. The tooth of the rack <NUM> is disposed toward the inner wall of the tower.

The rack <NUM> is disposed in the discharge space <NUM> and may be rotated together with the guide board <NUM>.

Hereinafter, the board guider <NUM> will be described with reference to <FIG>. The board guider <NUM> shown in <FIG> is a board guider <NUM> disposed in the second tower <NUM>, but the same can be applied to the board guider disposed in the first tower <NUM>. The board guider <NUM> shown in <FIG> may be classified into a first board guider disposed in the first tower <NUM> and a second board guider disposed in the second tower <NUM>. In addition, the configuration of the board guider <NUM> described below may be classified into "a first" when disposed in the first tower <NUM>, and "a second" when disposed in the second tower <NUM>.

The board guider <NUM> may guide the turning movement of the guide board <NUM>. The board guider <NUM> may support the guide board <NUM> during the turning movement of the guide board <NUM>.

Referring to <FIG>, the board guide <NUM> is disposed in the opposite side of the rack <NUM> based on the guide board <NUM>. The board guider <NUM> may support a force applied from the rack <NUM>. Unlike the present embodiment, a groove corresponding to the turning radius of the guide board may be formed in the board guide <NUM>, and the guide board may be moved along the groove.

The board guider <NUM> may be assembled to the outer wall <NUM> and <NUM> of the tower. The board guider <NUM> may be disposed in the outside in a radial direction based on the guide board <NUM>, thereby minimizing contact with air flowing through the discharge space <NUM>.

Referring to <FIG>, the board guider <NUM> includes a movement guider <NUM>, a fixed guider <NUM>, and a friction reducing member <NUM>.

The movement guider <NUM> may be coupled to a structure that moves together with the guide board. The movement guider <NUM> may be coupled to the rack <NUM> or the guide board <NUM>, and may be rotated together with the rack <NUM> or the guide board <NUM>.

Referring to <FIG>, the movement guider <NUM> is disposed in the outer surface 410b of the guide board <NUM>.

The movement guider <NUM> is formed in an arc shape and may have the same center of curvature as the guide board <NUM>.

The length of the movement guider <NUM> is formed shorter than the length of the guide board <NUM>.

The movement guider <NUM> is disposed between the guide board <NUM> and the fixed guider <NUM>. The radius of the movement guider <NUM> is larger than the radius of the guide board <NUM> and smaller than the radius of the fixed guider <NUM>.

The movement guider <NUM> may be in contact with the fixed guider <NUM> to limit movement.

The fixed guider <NUM> is disposed in the outside in a radial direction in comparison with the movement guider <NUM>, and may support the movement guider <NUM>.

A guide groove <NUM> in which the movement guider <NUM> is disposed is formed in the fixed guider <NUM>. The guide groove <NUM> may be formed in correspondence with the rotation radius and curvature of the movement guider <NUM>.

The guide groove <NUM> is formed in an arc shape, and at least a part of the movement guider <NUM> is inserted into the guide groove <NUM>. The guide groove <NUM> is formed to be concave in the downward direction.

The movement guider <NUM> may move along the guide groove <NUM>.

The front end 445a of the guide groove <NUM> may limit movement of the movement guider <NUM> in one direction (a direction protruding to the blowing space). The rear end 445b of the guide groove <NUM> may limit movement of the movement guider <NUM> in the other direction (a direction for being accommodated inside the tower).

The friction reducing member <NUM> may reduce friction between the movement guider <NUM> and the fixed guider <NUM>. The friction reducing member <NUM> may be a roller. The friction reducing member <NUM> provides a rolling friction between the movement guider <NUM> and the fixed guider <NUM>. The shaft of the roller may be formed in the vertical direction. The friction reducing member <NUM> is coupled to the movement guider <NUM>.

It is possible to reduce friction and operating noise through the friction reducing member <NUM>. At least a portion of the friction reducing member <NUM> may be disposed to protrude to the outside in a radial direction in comparison with the movement guider <NUM>.

The friction reducing member <NUM> may be formed of an elastic material, and may be elastically supported by the fixed guider <NUM> in the radial direction.

The friction reducing member <NUM> may contact the front end 445a or the rear end 445b of the guide groove <NUM>.

The blower <NUM> may further include a motor mount <NUM> for supporting the guide motor <NUM> and fixing the guide motor <NUM> to the tower.

Referring to <FIG>, the motor mount <NUM> is disposed in a lower portion of the guide motor <NUM> and supports the guide motor <NUM>. The guide motor <NUM> is assembled to the motor mount <NUM>.

The motor mount <NUM> may be coupled to the inner wall <NUM>, <NUM> of the tower. The motor mount <NUM> may be manufactured integrally with the inner wall <NUM>, <NUM>.

Hereinafter, the disposition of the blower <NUM> and the flow of air in the horizontal airflow and the upward airflow will be described with reference to <FIG> and <FIG>.

Referring to <FIG>, when providing horizontal airflow, the first guide board <NUM> is concealed inside the first tower <NUM>, and the second guide board <NUM> is concealed inside the second tower <NUM>.

The discharge air of the first discharge port <NUM> and the discharge air of the second discharge port <NUM> are joined in the blowing space <NUM>, and pass through the front end <NUM>, <NUM> to flow forward.

The air in the rear side of the blowing space <NUM> may be guided into the blowing space <NUM>, and then may flow forward.

In addition, the air around the first tower <NUM> may flow forward along the first outer wall <NUM>, and the air around the second tower <NUM> may flow forward along the second outer wall <NUM>.

Since the first discharge port <NUM> and the second discharge port <NUM> are formed to extend long in the vertical direction and are disposed to be vertically symmetrical, the air flowing in the upper side of the first discharge port <NUM> and the second discharge port <NUM> and the air flowing in the lower side may be formed more uniformly.

In addition, the air discharged from the first discharge port and the second discharge port are joined in the blowing space, thereby improving the straightness of the discharge air and allowing the air to flow farther away.

Referring to <FIG>, when providing an upward airflow, the first guide board <NUM> and the second guide board <NUM> protrude to the blowing space <NUM> and block the front of the blowing space <NUM>.

In this case, the inner end 411a of the first guide board <NUM> and the inner end 412a of the second guide board <NUM> may be in close contact with each other or may be slightly spaced apart.

As the front of the blowing space <NUM> is blocked by the first guide board <NUM> and the second guide board <NUM>, the air discharged from the discharge port <NUM>, <NUM> rises along the rear surface of the guide board <NUM> and is discharged to the top of the blowing space <NUM>.

By forming an upward airflow in the blower <NUM>, it is possible to prevent the discharge air from flowing directly to the user. In addition, when it is desired to circulate indoor air, the blower <NUM> can be operated with an upward air flow.

For example, when an air conditioner and a blower are used simultaneously, the blower <NUM> can be operated with an upward air flow to promote convection of indoor air, and it is possible to cool or heat the indoor air more quickly.

Meanwhile, with reference to <FIG>, <FIG>, <FIG>, or <FIG>, the concentrated airflow using the airflow converter <NUM> will be described in more detail.

The air discharged forward in the state in which the guide board is hidden is referred to as a wide airflow, and the airflow concentrated in the center line L-L' than the wide airflow is referred to as a concentrated airflow.

The concentrated airflow is to concentrate the air discharged by the Coanda effect in the center line L-L' and to increase the straight travel distance.

When the guide board <NUM> passes through the inner wall <NUM>, <NUM> and protrudes to the blowing space <NUM> side, the guide board <NUM> may concentrate the air diffused in the left and right direction in the center line L-L'.

In order to form an effective concentrated airflow, the positions of the first board slit <NUM> and the second board slit <NUM> and the protrusion angle B of the guide board <NUM> should be determined.

Referring to <FIG>, the protrusion angle B may be an angle between the outer surface 410b of the guide board <NUM> and the center line L-L'. Since the guide board <NUM> is formed in a curved surface, the protrusion angle B may be defined as an angle between the tangent line of the guide board <NUM> at the point passing through the board slit <NUM>, <NUM> and the center line L-L'.

Referring to <FIG>, a separation length from the front end <NUM>, <NUM> of the guide board <NUM> to the board slit <NUM>, <NUM> is referred to as D.

A separation length D from the front end <NUM>, <NUM> of the guide board <NUM> to the board slit <NUM>, <NUM> may be formed in a range of <NUM> to <NUM>. Specifically, the separation length D may be a length between the front end <NUM>, <NUM> and the inner surface 410a of the guide board <NUM> in direct contact with the discharge air. Further, the protrusion angle B may be formed from <NUM> degree to <NUM> degrees.

<FIG> is a graph of the concentrated airflow with respect to the protrusion angle and the separation length, and <FIG> is a graph of the maximum airflow velocity with respect to the protrusion angle and the separation length.

Referring to <FIG>, when the separation length D is uniformly set to <NUM> and the protrusion angle B is changed from <NUM> degrees to <NUM> degree, it can be seen that the maximum wind velocity increases and then decreases. That is, when the protrusion angle B decreases from <NUM> degrees to <NUM> degrees, it can be seen that the maximum wind velocity increases up to <NUM>/s. In addition, when the protrusion angle B decreases from <NUM> degrees to <NUM> degree, it can be seen that the maximum wind velocity decreases from <NUM>/s to <NUM>/s.

In addition, when the protrusion angle B is uniformly set to <NUM> degrees and the separation length D is changed from <NUM> to <NUM>, it can be seen that the maximum wind velocity increases from <NUM>/s to <NUM>/s.

Referring to <FIG> or <FIG>, it can be seen that as the separation length D increases, the maximum velocity of the airflow decreases. It can be seen that as the protrusion angle B increases, the maximum velocity of the airflow decreases.

Referring to <FIG>, when the separation distance D is <NUM> and the protrusion angle B is <NUM> degrees, it can be seen that the spread of airflow in the vertical or horizontal direction is minimized, and the airflow is concentrated in the center. When the separation distance D is <NUM> and the protrusion angle B is <NUM> degrees, it can be seen that the airflow forms the highest wind velocity.

Referring to <FIG>, when the separation distance D is formed to be <NUM> to <NUM> and the protrusion angle is formed to be <NUM> to <NUM> degrees, it can be seen that a maximum wind velocity of <NUM>/s or more can be formed.

The horizontal airflow that air flows forward of the blower <NUM> includes a wide airflow that forms an air flow forward along the inner wall <NUM> of the first tower <NUM> and the inner wall <NUM> of the second tower <NUM>, and one-sided airflow that the air flowing along the inner wall <NUM> of the first tower <NUM> and the inner wall <NUM> of the second tower <NUM> is biased to the left or right by the first guide board <NUM> or the second guide board <NUM>.

<FIG> is an exemplary view showing a wide airflow of a blower according to the first embodiment of the present invention. Hereinafter, with reference to <FIG> or <FIG>, the wide airflow of the blower will be described.

When the wide airflow is set, the first guide board <NUM> does not protrude toward the blowing space <NUM> and the second guide board <NUM> is disposed not to protrude toward the blowing space <NUM>. When the wide airflow is set, the first guide board <NUM> is concealed in the first tower <NUM> and the second guide board <NUM> is concealed in the second tower <NUM>. The wide airflow may be directly selected by a user or may be selected as a default value.

In detail, the inner end 411a of the first guide board <NUM> is located within the first board slit <NUM> without protruding to the outside of the inner wall <NUM>. The inner end 412a of the second guide board <NUM> does not protrude to the outside of the inner wall <NUM> and is located in the second board slit <NUM>.

When the wide airflow is selected, the discharge air flowing through the blowing space <NUM> may flow while being diffused in the horizontal direction along the discharge angle (A, see <FIG>).

Hereinafter, one-sided airflow of the blower will be described with reference to <FIG>.

When a first protruding length t1 of the first guide board <NUM> that protrudes from the first inner wall <NUM> is different from a second protruding length t2 of the second guide board <NUM> that protrudes from the second inner wall <NUM>, one-sided airflow may be formed.

The discharge air may be steered by forming the first protruding length t1 of the first guide board <NUM> and the second protruding length t2 of the second guide board <NUM> to be different from each other. Here, the first guide board <NUM> or the second guide board <NUM> cannot protrude beyond the center line L-L'.

The point at which the maximum airflow velocity is formed is defined as an airflow center point, and the angle between the center line L-L' and the airflow center point is defined as a steering angle.

Referring to FIG. 22A, when a rightward-sided airflow is set, the inner end 411a of the first guide board <NUM> protrudes from the first board slit <NUM> toward the blowing space <NUM>, and the second guide board <NUM> is disposed inside the second tower <NUM>.

The first protruding length t1 of the first guide board <NUM> may be adjusted so as to adjust the angle of the rightward-sided airflow. As the first protruding length t1 increases, a rightward angle may increase.

Referring to FIG. 22B, when a leftward-sided airflow is set, the inner end 412a of the second guide board <NUM> protrudes from the second board slit <NUM> toward the blowing space <NUM>, and the first guide board <NUM> is disposed inside the first tower <NUM>.

The angle of the leftward-sided airflow may be adjusted by adjusting the second protruding length t2 of the second guide board <NUM>. As the second protruding length t2 increases, a leftward angle may increase.

The leftward-sided airflow and the rightward-sided airflow may be operated by receiving input through a remote controller, a control panel button, or the like. Dissimilarly, when a camera for recognizing user's position in a room is disposed, the leftward-sided airflow and the rightward-sided airflow may be automatically selected according to the user's position recognized through the camera.

<FIG> is a graph showing one-sided airflow according to the first protruding length t1 of the first guide board at a height of <NUM> from floor.

It can be seen that as the first protruding length t1 increases, the center of the airflow forming the maximum velocity moves to the right.

Referring to <FIG>, it can be seen that when the first protruding length t1 increases from <NUM> to <NUM>, the maximum velocity of the airflow increases, and when the first protruding length t1 exceeds <NUM>, the maximum velocity of the airflow decreases again.

When the first protruding length t1 ranges until a critical point, the maximum airflow velocity increases by concentrating the discharge air through the Coanda effect, but when the first protruding length t1 exceeds the critical point, the maximum airflow velocity decreases by increasing the resistance of the discharge air.

Referring to <FIG>, it can be seen that as the first protruding length t1 increases, the direction of the center point of the airflow forming the maximum velocity moves to one side.

<FIG> is an exemplary view showing a concentrated rotation of the blower according to the first embodiment of the present invention.

Concentrated rotation refers to a mode in which discharge air is reciprocated from left to right or from right to left. During concentrated rotation, the center point of the airflow may reciprocate in the left and right direction.

When the concentrated rotation is set, the first airflow converter <NUM> and the second airflow converter <NUM> may operate simultaneously. When the concentrated rotation is set, the first guide board <NUM> and the second guide board <NUM> may protrude to the blowing space <NUM>.

At this time, the first guide board <NUM> and the second guide board <NUM> may reciprocate without stopping.

In detail, during concentrated rotation, the first protruding length t1 may be gradually increased and the second protruding length t2 may be gradually decreased. On the contrary, the second protruding length t2 may be gradually increased, and the first protruding length t1 may be gradually decreased. Here, the distance between the inner ends 411a and 412a of the first guide board <NUM> and the second guide board <NUM> may be uniformly maintained.

The first guide board <NUM> or the second guide board <NUM> cannot protrude beyond the center line L-L'.

When the first protruding length t1 is gradually increased and the second protruding length t2 is gradually decreased, the discharge air is formed as a gradual rightward-sided airflow.

The rightward-sided airflow formed in the concentrated rotation may have a narrower airflow width than the non-rotating one-sided airflow. This is because the distance between the inner ends 411a and 412a of the first guide board <NUM> and the second guide board <NUM> is formed to be narrow.

Similarly, when the second protruding length t2 is gradually increased and the first protruding length t1 is gradually decreased, the discharge air is formed as a gradual leftward-sided airflow.

The concentrated rotation may alternately provide the rightward-sided airflow and the leftward-sided airflow. In addition, the concentrated rotation may provide a narrow range of airflow with a high air volume as well as with a wide range of angle in comparison with a case of only providing a rightward-sided airflow or a leftward-sided airflow.

On the other hand, unlike concentrated rotation, wide rotation may be selected.

Wide rotation allows the discharge air to reciprocate from left to right or from right to left, and the center point of the airflow may reciprocate in the left and right direction. However, wide rotation provides a wider airflow width than concentrated rotation.

During wide rotation, the first airflow converter <NUM> and the second airflow converter <NUM> may be sequentially operated.

When the first guide board <NUM> gradually reciprocates while forming the first protruding length t1, the second guide board <NUM> maintains a state of being accommodated in the second tower <NUM>. On the contrary, when the second guide board <NUM> gradually reciprocates while forming the second protruding length t2, the first guide board <NUM> maintains a state of being accommodated in the second tower <NUM>.

That is, the wide rotation repeats a process in which the first guide board <NUM> protrudes to the center line L-L' and then is accommodated in the first board slit <NUM>, and the second guide board <NUM> protrudes to the center line L-L' and then is accommodated in the second board slit <NUM>.

Hereinafter, a blower including a third air guide <NUM> will be described with reference to <FIG>.

Referring to <FIG>, a third discharge port <NUM> penetrating the upper surface <NUM> of the tower base <NUM> in the vertical direction may be formed. A third air guide <NUM> for guiding rising air may be disposed in the third discharge port <NUM>.

Referring to <FIG>, the third air guide <NUM> is disposed to be inclined with respect to the vertical direction. The upper end 133a of the third air guide <NUM> is disposed ahead of the lower end 133b.

The third air guide <NUM> includes a plurality of vanes which are disposed spaced apart from each other in the front-rear direction.

The third air guide <NUM> is disposed between the first tower <NUM> and the second tower <NUM>. The third air guide <NUM> is disposed below the blowing space <NUM>. The third air guide <NUM> is formed to discharge air toward the blowing space <NUM>.

Referring to <FIG>, the inclination of the third air guide <NUM> with respect to the vertical direction is defined as an air guide angle C.

<FIG> is a value obtained by measuring the airflow velocity with respect to an air guide angle C measured at a point P of <NUM> in front of the upper end 133a. The airflow velocity for the air guide angle C is measured according to the number of vanes.

Referring to <FIG>, when the number of vanes is four or more, if the air guide angle C is less than <NUM> degrees, it can be seen that the airflow velocity at the point P converges to zero. When the number of vanes is two, even if the air guide angle C is reduced, the airflow from the point P toward the front is measured.

<FIG> is a value obtained by measuring the airflow velocity at the upper end <NUM>. Referring to <FIG>, when the number of vanes is two, four, or six, the airflow velocity can be measured at the upper end <NUM>.

In particular, when the number of vanes is four or six, it can be seen that the airflow velocity decreases as the air guide angle C increases.

When the results of <FIG> and <FIG> are summarized, the third air guide <NUM> may minimize the air flowing forward only when at least four vanes are disposed, and may secure the airflow velocity of the air that flows upward.

The blower according to the present disclosure has one or more of the following effects.

First, there is an advantage in that the wind direction of the air discharged from the blower can be changed without rotating the blower itself.

Second, there is an advantage in that the air discharged from the blower forms an upward airflow in addition to the horizontal airflow, thereby forming air circulation in the indoor space.

Third, there is also an advantage of being able to deflect the wind direction of the air discharged from the blower.

Fourth, there is also an advantage that the wind direction of the air discharged from the blower can be continuously changed without rotating the blower itself.

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

Claim 1:
A blower, comprising:
a first tower (<NUM>) having a first inner wall (<NUM>) and a first outer wall (<NUM>) which are configured to form a first inner air flow path on an upper portion of the blower;
a second tower (<NUM>) having a second inner wall (<NUM>) and a second outer wall (<NUM>) which are configured to form a second inner air flow path on the upper portion of the blower, wherein the second inner wall is facing the first inner wall and is
spaced apart laterally from the first inner wall to form a blowing space (<NUM>) therebetween;
a first discharge port (<NUM>) formed in the first inner wall and configured to discharge a frontward airflow to the blowing space;
a second discharge port (<NUM>) formed in the second inner wall to discharge a frontward airflow to the blowing space;
a fan (<NUM>) provided in a lower portion of the blower below the first and second towers and configured to blow air toward the first and second inner air flow paths;
a first guide board (<NUM>) provided movably inside the first tower to protrude to the blowing space;
a second guide board (<NUM>) provided movably inside the second tower to protrude to the blowing space, and
wherein the first and second guide boards are configured to block a front of the blowing space to change a direction of an air discharged from the first and second discharge ports to upward.