Patent Description:
The present disclosure relates to a blower. In particular, the present disclosure relates to a blower capable of discharging air by using the coanda effect.

A blower may cause a flow of air to circulate air in an indoor space or form airflow toward a user. Recently, many studies have been conducted on an air discharge structure of the blower that may give the user a sense of comfort.

In this regard, <CIT>, <CIT>, <CIT>, and <CIT> disclose a fan or a blowing device for blowing air using a coanda effect.

However, above conventional techniques have a problem in that air may be discharged only to a certain area. In addition, it is necessary to move or rotate the fan in order to change a wind direction, and accordingly, there is a problem that power is consumed, or noise or vibration is generated.

The document <CIT> discloses a blower with two upper bodies being formed by upright towers and delimiting an air flow space in between, each tower providing a slit for the air to exit. The document <CIT> discloses a blower with two upright elongated upper bodies that have an inclined outer surface versus the space between the two towers. It is an object of the present disclosure to solve the above and other problems.

It is another object of the present disclosure to provide a blower capable of blowing air by using a coanda effect.

It is another object of the present disclosure to smoothly guide air discharged from a slit formed at a rear part of a blower to a front, thereby minimizing air volume loss or noise generation due to air flow.

It is another object of the present disclosure to provide a blower capable of forming airflow blown over a wide range.

It is another object of the present disclosure to provide a blower capable of forming various airflow such as diffused wind or rising wind.

The invention is specified by independent claim <NUM>. In accordance with an aspect of the present disclosure, the above and other objects can be accomplished by providing a blower including a fan causing airflow; a lower body forming a lower space therein in which the fan is disposed, and having a suction hole through which air passes; a first upper body positioned above the lower body, and forming a first inner space communicating with the lower space of the lower body; a second upper body positioned above the lower body, and forming a second inner space communicating with the lower space of the lower body, the second upper body is spaced apart from the first upper body; and a space formed between the first upper body and the second upper body, and opened in a front-rear direction, wherein the first upper body comprises a first slit formed through the first upper body such that air in the first inner space is discharged into the space, and wherein the second upper body comprises a second slit formed through the second upper body such that air in the second inner space is discharged into the space.

Hereinafter, exemplary embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but identical or similar elements are denoted by the same reference numerals regardless of reference numerals, and redundant descriptions thereof will be omitted.

In describing the embodiments disclosed in the present specification, when it is determined that a detailed description of related known technologies may obscure the subject matter of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are for easy understanding of the embodiments disclosed in the present specification, and the technical idea disclosed in the present specification is not limited by the accompanying drawings, and it is to be understood as including all changes, equivalents, and substitutes included in the technical scope of the present disclosure.

Terms including ordinal numbers, such as first and second, may be used to describe various elements, but the elements are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another component.

Direction indications of up U, down D, left Le, right Ri, front F and rear R shown in the drawings are for convenience of description only, and the disclosed technical idea is not limited by these.

Referring to <FIG>, a blower <NUM> may be elongated long in the up-down direction. The blower <NUM> may include a base <NUM>, a lower body <NUM>, a first upper body <NUM>, and a second upper body <NUM>.

The base <NUM> may form a lower surface of the blower <NUM> and may be placed on a floor of an indoor space. The base <NUM> may be formed in a circular plate shape as a whole.

The lower body <NUM> may be disposed above the base <NUM>. The lower body <NUM> may form a lower side of the blower <NUM>. The lower body <NUM> may be formed in a cylindrical shape as a whole. For example, a diameter of the lower body <NUM> may decrease from a lower portion to an upper portion of the lower body <NUM>. For another example, the diameter of the lower body <NUM> may be kept constant in the up-down direction. A suction hole <NUM> may be formed to pass through a side surface of the lower body <NUM>. For example, the plurality of suction holes <NUM> may be evenly disposed along the circumferential direction of the lower body <NUM>. Hereby, air may flow from an outside to an inside of the blower <NUM> through the plurality of suction holes <NUM>.

The first upper body <NUM> and the second upper body <NUM> may be disposed above the lower body <NUM>. The first upper body <NUM> and the second upper body <NUM> may form an upper side of the blower <NUM>. The first upper body <NUM> and the second upper body <NUM> may extend long in the up-down direction and may be spaced apart from each other in the left-right direction. A space <NUM> may be formed between the first upper body <NUM> and the second upper body <NUM> to provide a flow path for air. Meanwhile, the space <NUM> may be referred to as a blowing space, a valley, or a channel. Meanwhile, the first upper body <NUM> may be referred to as a first tower, and the second upper body <NUM> may be referred to as a second tower.

The first upper body <NUM> may be spaced to the left from the second upper body <NUM>. The first upper body <NUM> may be elongated long in the up-down direction. A first boundary surface <NUM> of the first upper body <NUM> toward the space <NUM> and may define a part of a boundary of the space <NUM>. The first boundary surface <NUM> of the first upper body <NUM> may be a curved surface convex to the right or in a direction from the first upper body <NUM> toward the space <NUM>. A first outer surface <NUM> of the first upper body <NUM> may oppose to the first boundary surface <NUM> of the first upper body <NUM>. The first outer surface <NUM> of the first upper body <NUM> may be a curved surface convex to the left or in a direction to opposite to the direction from the first upper body <NUM> toward the space <NUM>.

For example, the first boundary surface <NUM> of the first upper body <NUM> may be elongated long in the up-down direction. For example, the first outer surface <NUM> of the first upper body <NUM> may be inclined and extended at a certain angle (acute angle) to the right or in a direction toward the space <NUM> with respect to a vertical line extending in the up-down direction.

At this time, a curvature of the first outer surface <NUM> of the first upper body <NUM> may be greater than a curvature of the first boundary surface <NUM> of the first upper body <NUM>. And, the first boundary surface <NUM> of the first upper body <NUM> may meet the first outer surface <NUM> of the first upper body <NUM> to form an edge. The edge may be provided as a front end 20F and a rear end 20R of the first upper body <NUM>. For example, the front end 20F may be inclined and extended at a certain angle (acute angle) backward with respect to a vertical line extending in the up-down direction. For example, the rear end 20R may be inclined and extended at a certain angle (acute angle) forward with respect to a vertical line extending in the up-down direction.

The second upper body <NUM> may be spaced to the right from the first upper body <NUM>. The second upper body <NUM> may be elongated long in the up-down direction. A second boundary surface <NUM> of the second upper body <NUM> toward the space <NUM> and may define a part of the boundary of the space <NUM>. The second boundary surface <NUM> of the second upper body <NUM> may be a curved surface convex to the left or in a direction from the second upper body <NUM> toward the space <NUM>. The second outer surface <NUM> of the second upper body <NUM> may oppose to the second boundary surface <NUM> of the second upper body <NUM>. The second outer surface <NUM> of the second upper body <NUM> may be a curved surface convex to the right or in a direction opposite to the direction from the second upper body <NUM> toward the space <NUM>.

For example, the second boundary surface <NUM> of the second upper body <NUM> may be elongated long in the up-down direction. For example, the second outer surface <NUM> of the second upper body <NUM> may be inclined and extended at a certain angle (acute angle) to the left or in a direction toward the space <NUM> with respect to a vertical line extending in the up-down direction.

In this case, a curvature of the second outer surface <NUM> of the second upper body <NUM> may be greater than a curvature of the second boundary surface <NUM> of the second upper body <NUM>. And, the second boundary surface <NUM> of the second upper body <NUM> may meet the second outer surface <NUM> of the second upper body <NUM> to form an edge. The edge may be provided as a front end 30F and a rear end 30R of the second upper body <NUM>. For example, the front end 30F may be inclined and extended at a certain angle (acute angle) backward with respect to a vertical line extending in the up-down direction. For example, the rear end 30R may be inclined and extended at a certain angle (acute angle) forward with respect to a vertical line extending in the up-down direction.

Meanwhile, the first upper body <NUM> and the second upper body <NUM> may be symmetrical in the left-right direction with the space <NUM> interposed therebetween. And, the first outer surface <NUM> of the first upper body <NUM> and the second outer surface <NUM> of the second upper body <NUM> may be positioned on a virtual curved surface extending along an outer peripheral surface <NUM> of the lower body <NUM>. In other words, the first outer surface <NUM> of the first upper body <NUM> and the second outer surface <NUM> of the second upper body <NUM> may be smoothly connected to the outer peripheral surface <NUM> of the lower body <NUM>. And, an upper surface of the first upper body <NUM> and an upper surface of the second upper body <NUM> may be provided as horizontal surfaces. In this case, the blower <NUM> may be formed in a truncated cone shape as a whole. Hereby, a risk of the blower <NUM> being overturned by an external impact may be lowered.

A groove <NUM> may be positioned between the first upper body <NUM> and the second upper body <NUM>, and may be elongated long in the front-rear direction. The groove <NUM> may be a curved surface concave downward. The groove <NUM> may be connected to a lower side of the first boundary surface <NUM> of the first upper body <NUM> and a lower side of the second boundary surface <NUM> of the second upper body <NUM>. The groove <NUM> may form a part of a boundary of the space <NUM>. Air flowing inside the lower body <NUM> by the fan <NUM> to be described later may be distributed to the inner space of the first upper body <NUM> and the inner space of the second upper body <NUM> with the groove <NUM> interposed therebetween. Meanwhile, the groove <NUM> may be referred to as a connection groove or a connection surface.

Meanwhile, a hole <NUM> may be formed to pass through a side of the lower body <NUM>. The hole <NUM> may be provided in a front part of the lower body <NUM>. A display (not shown) may be inserted into the hole <NUM> and exposed forward. In this case, the display may display a driving information of the blower <NUM>, or provide an interface unit for receiving commands of a user. For example, the display may have a touch panel. An outer surface of the display may be formed to have a sense of unity with an outer surface of the lower body <NUM>.

Referring to <FIG>, the lower body <NUM> may provide a lower space in which a filter <NUM>, a control unit <NUM>, a fan <NUM>, and an air guide <NUM> are installed, to be described later.

The filter <NUM> may be detachably installed in the lower space of the lower body <NUM>. For example, the filter <NUM> may be detachably installed at the filter frame 3a fixed to the lower body <NUM>. The filter frame 3a may support a side and an upper side of the filter <NUM>. The filter <NUM> may be formed in a cylindrical shape as a whole. That is, the filter <NUM> may include a hole 3P formed to pass through the filter <NUM> in the up-down direction. In this case, indoor air may flow into the lower body <NUM> through the suction hole <NUM> by an operation of the fan <NUM> to be described later. And, indoor air flowing into the lower body <NUM> may be purified by flowing from an outer circumferential surface of the filter <NUM> to an inner circumferential surface of the filter <NUM> and may flow through the hole 3P upward. Meanwhile, a grill 3b may be disposed between the filter <NUM> and the fan <NUM> to be described later, and may provide a hole or flow path communicating with the hole 3P. In the case where the filter <NUM> is separated from the lower body <NUM>, the grill 3b may prevent a user from putting a finger or the like into an inside of the fan <NUM>.

The control unit <NUM> may be installed in the lower space of the lower body <NUM>. The control unit <NUM> may be disposed between a base <NUM> and the filter <NUM>, and may be fixed to the base <NUM>. The control unit <NUM> may control an operation of the blower <NUM>. The control unit <NUM> may support the filter <NUM> and may be referred to as a supporter for the filter <NUM>. On the other hand, a flow of air passing through the filter <NUM> may be used for cooling the control unit <NUM> having a heating element.

The fan <NUM> may be installed in the lower space of the lower body <NUM> and may be disposed above the filter <NUM>. The fan <NUM> may cause a flow of air flowed into the blower <NUM> or discharged from the blower <NUM> to an outside. The fan <NUM> may include a fan housing <NUM>, a fan motor, a hub <NUM>, a shroud <NUM>, and a blade <NUM>. Meanwhile, the fan <NUM> may be referred to as a fan assembly or a fan module.

The fan housing <NUM> may form an exterior of the fan <NUM>. The fan housing <NUM> may include a suction port (no reference numeral) formed to penetrate the fan housing <NUM> in the up-down direction. The suction port may be formed at a lower end of the fan housing <NUM> and may be referred to as a bell mouth.

The fan motor (not shown) may provide rotational force. The fan motor may be a centrifugal fan or a four-flow fan motor. The fan motor may be supported by a motor cover <NUM> to be described later. At this time, a rotation shaft of the fan motor may extend to a lower side of the fan motor and may penetrate a lower surface of the motor cover <NUM>. The hub <NUM> may be rotated together with the rotation shaft by coupling the rotation shaft. The shroud <NUM> may be spaced apart from the hub <NUM>. A plurality of blades <NUM> may be disposed between the shroud <NUM> and the hub <NUM>.

Accordingly, when the fan motor is driven, air may be flowed into an axial direction of the fan motor (i.e., a longitudinal direction of the rotation shaft) through the suction port and may be discharged in a radial direction of the fan motor and an upper side of that.

An air guide <NUM> may provide a flow path 60P through which air discharged from the fan <NUM> flows. For example, the flow path 60P may be an annular flow path. The air guide <NUM> may include a guide body <NUM>, a motor cover <NUM>, and a vane <NUM>. Meanwhile, the air guide <NUM> may be referred to as a diffuser.

The guide body <NUM> may form an exterior of the air guide <NUM>. The motor cover <NUM> may be disposed at a center part of the air guide <NUM>. For example, the guide body <NUM> may be formed in a cylindrical shape. And, the motor cover <NUM> may be formed in a bowl shape. In this case, the above-described the annular flow path 60P may be formed between the guide body <NUM> and the motor cover <NUM>. The vane <NUM> may guide air provided to the flow path 60P from the fan <NUM> upward. A plurality of vanes <NUM> may be disposed at the annular flow path 60P and may be spaced apart from each other in a circumferential direction of the guide body <NUM>. At this time, each of the plurality of vanes <NUM> may extend from an outer surface of the motor cover <NUM> to an inner circumferential surface of the guide body <NUM>.

A distribution unit <NUM> may be positioned above the air guide <NUM> and may be disposed between the lower body <NUM> and the upper bodies <NUM> and <NUM>. The distribution unit <NUM> may provide a flow path 40P through which air passing through the air guide <NUM> flows. Air passing through the air guide <NUM> may be distributed to the first upper body <NUM> and the second upper body <NUM> through the distribution unit <NUM>. In other words, the air guide <NUM> may guide air flowing by the fan <NUM> to the distribution unit <NUM>, and the distribution unit <NUM> may guide air flowed from the air guide <NUM> to the first upper body <NUM> and the second upper body <NUM>. The aforementioned groove <NUM> (see <FIG>) may form a part of an outer surface of the distribution unit <NUM>. Meanwhile, the distribution unit <NUM> may be referred to as a middle body, an inner body, or a tower base.

Referring to <FIG> and <FIG>, a central axis O may extend from a center of the space <NUM> in the up-down direction, and a shape of the blower <NUM> may be symmetrical with respect to the central axis O in the left-right direction. A reference line L may extend in front-rear direction by crossing the central axis O, and a cross section of the blower <NUM> may be symmetrical with respect to the reference line L in the left-right direction.

The first upper body <NUM> may provide a first flow path 20P through which a part of air passing through the air guide <NUM> flows. The first flow path 20P may be formed in the inner space of the first upper body <NUM>. The second upper body <NUM> may provide a second flow path 30P through which the rest of the air passing through the air guide <NUM> flows. The second flow path 30P may be formed in the inner space of the second upper body <NUM>. The first flow path 20P and the second flow path 30P may be communicate with the flow path 40P of the distribution unit <NUM> and the flow path 60P of the air guide <NUM>.

A first slit <NUM> may discharge air flowing through the first flow path 20P to the space <NUM>. The first slit <NUM> may be adjacent to a rear end 20R (see <FIG>) of the first upper body <NUM> and may be formed to pass through the first boundary surface <NUM> of the first upper body <NUM>. The first slit <NUM> may be formed long along the rear end 20R of the first upper body <NUM>. For example, the first slit <NUM> may be hidden from a user's gaze looking from a front direction to a rear direction of the blower <NUM>.

A second slit <NUM> may discharge air flowing through the second flow path 30P to the space <NUM>. The second slit <NUM> may be adjacent to a rear end 30R (see to <FIG>) of the second upper body <NUM> and may formed to pass through the second interface <NUM> of the second upper body <NUM>. The second slit <NUM> may be formed to extend along the rear end 30R of the second upper body <NUM>. For example, the second slit <NUM> may be hidden from the user's gaze looking from a front direction to a rear direction of the blower <NUM>.

For example, the first slit <NUM> and the second slit <NUM> face each other and may be symmetrical to each other. For example, the first slit <NUM> may be provided as an outlet end of the first opening L-O, and the second slit <NUM> may be provided as an outlet end of the second opening R-O.

First inner sleeves <NUM>, <NUM> may be coupled to the inner surface of the first upper body <NUM> and may define a boundary of the first flow path 20P. One end and the other end of the first inner sleeves <NUM>, <NUM> are spaced apart from each other, and the first opening L-O may be formed between the one end and the other end of the first inner sleeves <NUM>, <NUM>.

Specifically, the first inner sleeves <NUM>, <NUM> may include a first part <NUM> and a second part <NUM>. The first part <NUM> may include a first extension portion 25a and first discharge portions 25b, 25c. The second part <NUM> may include a second guide portion 26a, a second extension portion 26b, and a second discharge portion 26c.

The first extension portion 25a may be coupled to at least a part of an inner surface (no reference numeral) of a part of the first upper body <NUM> forming the first boundary surface <NUM>. The first extension portion 25a may extend along the inner surface. In this case, the first extension portion 25a may be formed convexly toward the first boundary surface <NUM>.

The first discharge portions 25b, 25c may form an acute angle with respect to the reference line L and may be obliquely extended from the first extension portion 25a rearward. A thickness of the first discharge portions 25b, 25c may be greater than a thickness of the first extension portion 25a. The first discharge portions 25b, 25c may be approximatively formed in a shape of an airfoil. The first discharge portions 25b, 25c may form one end of the first inner sleeves <NUM>, <NUM>.

At this time, the first discharge portions 25b, 25c may include a first guide surface 25b connected to an inner surface of the first extension portions 25a and defined the boundary of the first flow path 20P together with the inner surface of the first extension portion 25a. The first discharge portions 25b, 25c may include a first discharge surface 25c bent from the first guide surface 25b and defined the boundary of the first opening L-O. An angle of the first guide surface 25b with respect to the reference line L may be smaller than an angle of the first discharge surface 25c with respect to the reference line L. For example, the first guide surface 25b may be a curved surface or a flat surface, and the first discharge surface 25c may be a curved surface.

The second guide portion 26a may be disposed in front of the above-described first extension portion 25a. The second guide portion 26a may be coupled to a part of an inner surface (no reference numeral) of a part forming the first outer surface <NUM> of the first upper body <NUM>. The second guide portion 26a may extend along the inner surface. The second guide portion 26a may be formed convexly toward the first outer surface <NUM>. A thickness of the second guide portion 26a is greater than a thickness of the first extension portion 25a but may decrease as a distance from the first boundary surface <NUM> increases. The second guide portion 26a may be approximately formed in a fin shape. For example, a part of the second guide portion 26a may be coupled to a part of a part forming the first boundary surface <NUM> of the first upper body <NUM> to be in contact with or coupled to the first extension portion 25a.

The second extension portion 26b may extend from the second guide portion 26a and may be coupled to a part of the inner surface (no reference numeral) of the part forming the first outer surface <NUM> of the first upper body <NUM>. The second extension portion 26b may extend along the inner surface. The second extension portion 26b may be formed convexly toward the first outer surface <NUM>. A thickness of the second extension portion 26b may be smaller than a thickness of the second guide portion 26a and may be the same as or similar to the thickness of the first extension portion 25a. In this case, an inner surface of the second extension portion 26b may define the boundary of the first flow path 20P together with the inner surface of the second guide portion 26a.

The second discharge portion 26c may extend from the second extension portion 26b and may be coupled to a portion of a portion forming the first boundary surface <NUM> of the first upper body <NUM>. A thickness of the second discharge portion 26c may be greater than a thickness of the second extension portion 26b. The second discharge portion 26c may form the other end of the first inner sleeves <NUM>, <NUM>.

At this time, the inner surface of the second discharge portion 26c may be connected to the inner surface of the second extension portion 26b and may define a boundary of the first opening L-O. In other words, the inner surface of the second discharge part 26c may face the first discharge surface 25c, and the first opening L-<NUM> may be formed between the inner surface of the second discharge part 26c and the first discharge surface 25c. And an outlet end of the first opening L-O may be provided as the first slit <NUM> penetrating the first boundary surface <NUM>. Meanwhile, the inner surface of the second discharge portion 26c may be referred to as a second discharge surface.

Therefore, air flowing through the first flow path 20P may be provided to the space <NUM> through the first opening L-O and the first slit <NUM>. At this time, the first inner sleeves <NUM>, <NUM> may smoothly guide the air flowing through the first flow path 2OP to the first opening L-O while forming the boundary of the first flow path 20P.

Second inner sleeves <NUM>, <NUM> may be coupled to an inner surface of the second upper body <NUM> and may define a boundary of the second flow path 30P. One end and the other end of the second inner sleeves <NUM>, <NUM> may be spaced apart from each other and the second opening R-O may be formed between one end and the other end of the second inner sleeves <NUM>, <NUM>.

Specifically, the second inner sleeves <NUM>, <NUM> may include a first part <NUM> and a second part <NUM>. The first part <NUM> may include a first extension portion 35a and first discharge parts 35b, 35c. The second part <NUM> may include a second guide part 36a, a second extension part 36b, and a second discharge part 36c.

The first extension part 35a may be coupled to at least a part of an inner surface (no reference numeral) of a part forming the second boundary surface <NUM> of the second upper body <NUM>. The first extension part 35a may extend along the inner surface. In this case, the first extension part 35a may be formed convexly toward the second boundary surface <NUM>.

The first discharge portions 35b, 35c may form an acute angle with respect to the reference line L and may be obliquely extended from the first extension part 35a rearward. A thickness of the first discharge portions 35b, 35c may be greater than a thickness of the first extension portion 35a. The first discharge parts 35b, 35c may be approximatively formed in a shape of an airfoil. The first discharge portions 35b, 35c may form one end of the second inner sleeves <NUM>, <NUM>.

At this time, the first discharge portions 35b, 35c may include a first guide surface 35b connected to an inner surface of the first extension portions 35a and defined the boundary of the second flow path 30P together with the inner surface of the first extension portion 35a. The first discharge portions 35b, 35c may include a first discharge surface 35c bent from the first guide surface <NUM> and defined the boundary of the second opening R-O. An angle of the first guide surface 35b with respect to the reference line L may be smaller than an angle of the first discharge surface 35c with respect to the reference line L. For example, the first guide surface 35b may be a curved surface or a flat surface, and the first discharge surface 35c may be a curved surface.

The second guide portion 36a may be disposed in front of the above-described first extension portion 35a. The second guide portion 36a may be coupled to a part of an inner surface (no reference numeral) of a part forming the second outer surface <NUM> of the second upper body <NUM>. The second guide portion 36a may extend along the inner surface. The second guide portion 36a may be formed convexly toward the second outer surface <NUM>. A thickness of the second guide portion 36a may be greater than a thickness of the first extension portion 35a but may decrease as the distance from the second boundary surface <NUM> increases. The second guide portion 36a may be approximately formed in a fin shape. For example, a part of the second guide portion 36a may be coupled to a part of a part forming the second boundary surface <NUM> of the second upper body <NUM> to be in contact with or be coupled to the first extension portion 35a.

The second extension portion 36b may extend from the second guide portion 36a and may be coupled to a part of the inner surface (no reference numeral) of a part forming the second outer surface <NUM> of the second upper body <NUM>. The second extension portion 36b may extend along the inner surface. The second extension portion 36b may be formed convexly toward the second outer surface <NUM>. A thickness of the second extension portion 36b may be smaller than a thickness of the second guide portion 36a and may be the same as or similar to the thickness of the first extension portion 35a. At this time, an inner surface of the second extension portion 36b may define the boundary of the second flow path 30P together with the inner surface of the second guide portion 36a.

The second discharge portion 36c may extend from the second extension portion 36b and may be coupled to a part of a part forming the second boundary surface <NUM> of the second upper body <NUM>. A thickness of the second discharge portion 36c may be greater than a thickness of the second extension portion 36b. The second discharge portion 36c may form the other end of the second inner sleeves <NUM>, <NUM>.

In this case, the inner surface of the second discharge portion 36c may be connected to the inner surface of the second extension portion 36b and may define a boundary of the second opening R-O. In other words, the inner surface of the second discharge part 36c may face the first discharge surface 35c, and the second opening R-<NUM> may be formed between the inner surface of the second discharge part 36c and the first discharge surface 35c. And an outlet end of the second opening R-O may be provided as the second slit <NUM> penetrating the second boundary surface <NUM>. Meanwhile, the inner surface of the second discharge portion 36c may be referred to as a second discharge surface.

Therefore, air flowing through the second flow path 30P may be provided to the space <NUM> through the second opening R-O and the second slit <NUM>. In this case, the second inner sleeves <NUM>, <NUM> may smoothly guide the air flowing through the second flow path 30P to the second opening R-O while forming the boundary of the second flow path 30P.

Referring to <FIG>, the first opening (L-O) and the second opening (R-O) may communicate with the space <NUM> and may face each other. Air passing through the first flow path 20P may be discharged to the first slit <NUM> which is provided to an inlet end of the first opening L-O and is an outlet end of the first opening L-O. At this time, the inlet end of the first opening L-O may be positioned in the inner space of the first upper body <NUM> forming the first flow path 20P. The first opening L-O may be formed to be inclined or bent toward a front direction. For example, the first opening L-O may be formed to be inclined or bent toward a front direction of the second opening R-O. Air passing through the second flow path 30P may be discharged to the second slit <NUM> which is provided to an inlet end of the second opening R-O and is an outlet end of the second opening R-O. At this time, the inlet end of the second opening R-O may be positioned in the inner space of the second upper body <NUM> forming the second flow path 30P. The second opening R-<NUM> may be formed to be inclined or bent toward a front direction. For example, the second opening R-O may be formed to be inclined to or bent toward a front direction of the first opening L-O.

Accordingly, a part of the air flowing by the fan <NUM> (see <FIG>) may be discharged to the space <NUM> through the first slit <NUM>, and the rest of the air may be discharged to the space <NUM> through the second slit <NUM>, so that air may be mixed in the space <NUM>. And, due to the coanda effect, air discharged to the space <NUM> may flow forward along the first boundary surface <NUM> of the first upper body <NUM> and the second boundary surface <NUM> of the second upper body <NUM> (see reference numeral FR). In addition, such a flow of air may form airflow in which air around the upper bodies <NUM>, <NUM> is entrained into the space <NUM> or flow forward along the outer surfaces <NUM>, <NUM>. As a result, the blower <NUM> may provide airflow with a rich volume to a user or the like.

Referring to <FIG>, the first discharge surface 35c may include a first curved surface 35c-<NUM> and a second curved surface 35c-<NUM>. The first curved surface 35c-<NUM> may be connected to the guide surface 35b, and the second curved surface 35c-<NUM> may be connected to the first curved surface 35c-<NUM>. The first curved surface 35c-<NUM> and the second curved surface 35c-<NUM> may face the inner surface of the second discharge portion 36c. At this time, the inner surface of the second discharge part 36c may extend while drawing an arc at a constant curvature with respect to a center of curvature positioned in front of the second discharge part 36c. And the first curved surface 35c-<NUM> may extend while drawing an arc at a constant curvature with respect to a center of curvature positioned in front of the first curved surface 35c-<NUM>. In addition, the second curved surface 35c-<NUM> may extend while drawing an arc at a constant curvature with respect to a center of curvature positioned in front of the second curved surface 35c-<NUM>.

The curvature of the first curved surface 35c-<NUM> may be greater than the curvature of the inner surface of the second discharge portion 36c. In this case, a gap between the first curved surface 35c-<NUM> and the inner surface of the second discharge portion 36c may decrease toward a downstream of the second opening R-O. Meanwhile, a section positioned between the first curved surface 35c-<NUM> and the inner surface of the second discharge portion 36c as a part of the second opening R-O may be referred to as a tapered section or a converging section.

The curvature of the second curved surface 35c-<NUM> may be the same as the curvature of the inner surface of the second discharge portion 36c. In this case, a gap between the second curved surface 35c-<NUM> and the inner surface of the second discharge portion 36c may be constant. Meanwhile, as section excluding the tapered section of the second opening R-O, the section positioned between the second curved surface 35c-<NUM> and the inner surface of the second discharge portion 36c may be referred to as a curved section.

A first gap 30Ga may be defined as a gap between one side of the first curved surface 35c-<NUM> and one side of the inner surface of the second discharge part 36c. A second gap 30Gb may be defined as a gap between the other side of the second curved surface 35c-<NUM> and an inner surface of the second discharge part 36c closest to the other side of the second curved surface 35c-<NUM>. In this case, the other side of the second curved surface 35c-<NUM> may be connected to one side of the first curved surface 35c-<NUM> or may be integrally formed with each other. A third gap 30Gc may be defined as a gap between the other side of the second curved surface 35c-<NUM> and the other side of the inner surface of the second discharge portion 36c. In addition, the third gap 30Gc may mean a width or gap of the second slit <NUM>.

In this case, the second gap 30Gb may be smaller than the first gap 30Ga, and the third gap 30Gc may be the same as the second gap 30Gb.

Accordingly, air accelerated while passing through the tapered section may be smoothly guided to the second boundary surface <NUM> through the curved section. That is, a flow direction of air discharged from the second flow path 30P to the space <NUM> may be smoothly switched from a rear direction to a front direction through the second opening R-O. Meanwhile, contents of the above-described first discharge surface 35c and the like may apply to the first discharge surface 25c as well.

Meanwhile, air noise may vary depending on the width of the first opening L-O or the second opening R-O, or the curvature of the portion forming the first opening L-O or the second opening R-O.

Referring to <FIG>, under the condition that a blowing amount of the fan <NUM> (see <FIG>) is <NUM> CMM, a noise(dB) generated from the first opening L-<NUM> or the second opening R-<NUM> according to a width W and a diameter D of the first opening L-O or the second opening R-O may be confirmed. Here, a width W of the second opening R-O is the same as a width of the first opening L-O as the third gap (30Gc, see <FIG>), and a diameter D of the second opening R-O is the same as a diameter of the first opening L-O as twice a reciprocal of the curvature of the second curved surface 35c-<NUM>.

When the width W is <NUM> or less, a noise of <NUM> dB or less may be measured at the first opening L-O or the second opening R-O. When the width W exceeds <NUM>, the noise of <NUM> dB or more may be measured at the first opening L-O or the second opening R-O.

When the diameter D is <NUM> to <NUM>, the noise of <NUM> dB or less may be measured at the first opening L-O or the second opening R-O. When the diameter D is outside the range of <NUM> to <NUM> above, the noise of <NUM> dB or more may be measured at the first opening L-O or the second opening R-O.

That is, when the diameter D is <NUM> to <NUM> and the width W is <NUM> or less, noise generated at the first opening L-O or the second opening R-O may be minimized. Preferably, the noise may be minimized in a region S. When the diameter D is <NUM> to <NUM> and the width W is <NUM>, the noise generated from the first opening L-O or the second opening R-O may be the smallest as <NUM>.

Referring to <FIG>, the blower <NUM> may be elongated long in the up-down direction. The blower <NUM> may include a base <NUM>, a lower body <NUM>, a first upper body <NUM>, and a second upper body <NUM>.

The lower body <NUM> may be disposed above the base <NUM>. The lower body <NUM> may form a lower side of the blower <NUM>. The lower body <NUM> may be formed in a cylindrical shape as a whole. For example, a diameter of the lower body <NUM> may decrease from a lower part to an upper part of the lower body <NUM>. For another example, the diameter of the lower body <NUM> may be kept constant in the up-down direction. A suction hole <NUM> may be formed to pass through a side surface of the lower body <NUM>. For example, a plurality of suction holes <NUM> may be evenly disposed along a circumferential direction of the lower body <NUM>. As a result, air may flow from an outside to an inside of the blower <NUM> through the plurality of suction holes <NUM>.

The first upper body <NUM> and the second upper body <NUM> may be disposed above the lower body <NUM>. The first upper body <NUM> and the second upper body <NUM> may form an upper side of the blower <NUM>. The first upper body <NUM> and the second upper body <NUM> extend long in the up-down direction and may be spaced apart from each other in the left-right direction. The space <NUM> is formed between the first upper body <NUM> and the second upper body <NUM> to provide a flow path for air. Meanwhile, the space <NUM> may be referred to as a blowing space, a valley, or a channel. Meanwhile, the first upper body <NUM> may be referred to as a first tower, and the second upper body <NUM> may be referred to as a second tower.

The first upper body <NUM> may be spaced to the left from the second upper body <NUM>. The first upper body <NUM> may be elongated long in the up-down direction. A first boundary surface <NUM> of the first upper body <NUM> toward the space <NUM> and may define a part of a boundary of the space <NUM>. The first boundary surface <NUM> of the first upper body <NUM> may be a curved surface convex to the right or in a direction from the first upper body <NUM> toward the space <NUM>. A first outer surface <NUM> of the first upper body <NUM> may oppose the first boundary surface <NUM> of the first upper body <NUM>. The first outer surface <NUM> of the first upper body <NUM> may be a curved surface convex to the left or in a direction to opposite a direction from the first upper body <NUM> toward the space <NUM>.

At this time, a curvature of the first outer surface <NUM> of the first upper body <NUM> may be greater than a curvature of the first boundary surface <NUM> of the first upper body <NUM>. In addition, the first boundary surface <NUM> of the first upper body <NUM> may meet the first outer surface <NUM> of the first upper body <NUM> to form an edge. The edge may be provided as a front end 120F and a rear end 120R of the first upper body <NUM>. For example, the front end 120F may be inclined and extended at a certain angle (acute angle) backward with respect to a vertical line extending in the up-down direction. For example, the rear end 120R may be inclined and extended at a certain angle (acute angle) forward with respect to a vertical line extending in the up-down direction.

The second upper body <NUM> may be spaced to the right from the first upper body <NUM>. The second upper body <NUM> may be elongated in the up-down direction. A second boundary surface <NUM> of the second upper body <NUM> toward the space <NUM> and may define a part of the boundary of the space <NUM>. The second boundary surface <NUM> of the second upper body <NUM> may be a curved surface convex to the left or in a direction from the second upper body <NUM> toward the space <NUM>. The second outer surface <NUM> of the second upper body <NUM> may oppose the second boundary surface <NUM> of the second upper body <NUM>. The second outer surface <NUM> of the second upper body <NUM> may be a curved surface convex to the right or in a direction opposite to a direction from the second upper body <NUM> toward the space <NUM>.

At this time, a curvature of the second outer surface <NUM> of the second upper body <NUM> may be greater than a curvature of the second boundary surface <NUM> of the second upper body <NUM>. And, the second boundary surface <NUM> of the second upper body <NUM> may meet the second outer surface <NUM> of the second upper body <NUM> to form an edge. The edge may be provided as a front end 130F and a rear end 130R of the second upper body <NUM>. For example, the front end 130F may be inclined and extended at a certain angle (acute angle) backward with respect to a vertical line extending in the up-down direction. For example, the rear end 130R may be inclined and extended at a certain angle (acute angle) forward with respect to a vertical line extending in the up-down direction.

Meanwhile, the first upper body <NUM> and the second upper body <NUM> may be symmetrical in the left-right direction with the space <NUM> interposed therebetween. And, the first outer surface <NUM> of the first upper body <NUM> and the second outer surface <NUM> of the second upper body <NUM> may be positioned on a virtual curved surface extending along an outer peripheral surface <NUM> of the lower body <NUM>. In other words, the first outer surface <NUM> of the first upper body <NUM> and the second outer surface <NUM> of the second upper body <NUM> may be smoothly connected to the outer peripheral surface <NUM> of the lower body <NUM>. And, an upper surface of the first upper body <NUM> and an upper surface of the second upper body <NUM> may be provided as horizontal surfaces. In this case, the blower <NUM> may be formed in a truncated cone shape as a whole. As a result, a risk of the blower <NUM> being overturned by an external impact may be lowered.

A groove <NUM> may be positioned between the first upper body <NUM> and the second upper body <NUM> and may be elongated long in the front-rear direction. The groove <NUM> may be a curved surface concave downward. The groove <NUM> may include a first side 141a (see <FIG>) connected to a lower side of the first boundary surface <NUM> of the first upper body <NUM> and a second side 141b (see <FIG>) connected to a lower side of the second boundary surface <NUM> of the second upper body <NUM>. The groove <NUM> may form a part of a boundary of the space <NUM>. Air flowing inside the lower body <NUM> by the fan <NUM> to be described later may be distributed to the inner space of the first upper body <NUM> and the inner space of the second upper body <NUM> with the groove <NUM> interposed therebetween. Meanwhile, the groove <NUM> may be referred to as a connection groove or a connection surface.

Meanwhile, a cover <NUM> may be detachably coupled to the lower body <NUM>. The cover <NUM> may be provided as a part of the lower body <NUM>. When the cover <NUM> is separated from the lower body <NUM>, a user may access the lower space of the lower body <NUM>. For example, the suction hole <NUM> may also be formed at the cover <NUM>.

Meanwhile, a display (not shown) may be provided at a front of the lower body <NUM> and may provide an interface for displaying driving information of the blower <NUM> or receiving a user's command. For example, the display may have a touch panel.

Referring to <FIG>, the lower body <NUM> may provide a lower space in which a filter <NUM>, a fan <NUM>, and an air guide <NUM> are installed, to be described later.

The filter <NUM> may be detachably installed in the lower space of the lower body <NUM>. The filter <NUM> may be formed in a cylindrical shape as a whole. That is, the filter <NUM> may include a hole 103P formed to pass through the filter <NUM> in the up-down direction. In this case, indoor air may flow into the lower body <NUM> through the suction hole <NUM> (see <FIG>) by an operation of the fan <NUM> to be described later. And, indoor air flowing into the lower body <NUM> may be purified by flowing from an outer circumferential surface of the filter <NUM> to an inner circumferential surface of the filter <NUM> and may flow upward through the hole 103P.

The fan <NUM> may be installed in the lower space of the lower body <NUM> and may be disposed above the filter <NUM>. The fan <NUM> may cause a flow of air flowed into the blower <NUM> or discharged from the blower <NUM> to an outside. The fan <NUM> may include a fan housing (no reference numeral), a fan motor <NUM>, a hub <NUM>, a shroud <NUM>, and a blade <NUM>. Meanwhile, the fan <NUM> may be referred to as a fan assembly or a fan module.

The fan housing may form an exterior of the fan <NUM>. The fan housing may include a suction port (no reference numeral) formed to pass through the fan housing in the up-down direction. The suction port may be formed at a lower end of the fan housing and may be referred to as a bell mouth.

The fan motor <NUM> may provide rotational force. The fan motor <NUM> may be a centrifugal fan motor or a four-flow fan motor. The fan motor <NUM> may be supported by a motor cover <NUM> to be described later. At this time, a rotation shaft of the fan motor <NUM> may extend to a lower side of the fan motor <NUM> and may penetrate a lower surface of the motor cover <NUM>. The hub <NUM> may be coupled with the rotation shaft and may rotate together with the rotation shaft. The shroud <NUM> may be spaced apart from the hub <NUM>. A plurality of blades <NUM> may be disposed between the shroud <NUM> and the hub <NUM>.

Accordingly, when the fan motor <NUM> is driven, air may be flowed into an axial direction of the fan motor <NUM> (i.e., a longitudinal direction of the rotation shaft) through the suction port and may be discharged to a radial direction of the fan motor <NUM> and an upper side of that.

An air guide <NUM> may provide a flow path 160P through which air discharged from the fan <NUM> flows. For example, the flow path 160P may be an annular flow path. The air guide <NUM> may include a guide body <NUM>, a motor cover <NUM>, and a vane <NUM>. Meanwhile, the air guide <NUM> may be referred to as a diffuser.

The guide body <NUM> may form an exterior of the air guide <NUM>. The motor cover <NUM> may be disposed at a center part of the air guide <NUM>. For example, the guide body <NUM> may be formed in a cylindrical shape. And, the motor cover <NUM> may be formed in a bowl shape. In this case, the above-described the annular flow path 160P may be formed between the guide body <NUM> and the motor cover <NUM>. The vane <NUM> may guide air provided to the flow path 160P from the fan <NUM> upward. A plurality of vanes <NUM> may be disposed at the annular flow path 160P and may be spaced apart from each other in a circumferential direction of the guide body <NUM>. At this time, each of the plurality of vanes <NUM> may extend from an outer surface of the motor cover <NUM> to an inner circumferential surface of the guide body <NUM>.

A distribution unit <NUM> may be positioned above the air guide <NUM> and may be disposed between the lower body <NUM> and the upper bodies <NUM> and <NUM>. The distribution unit <NUM> may provide a flow path 140P through which air passing through the air guide <NUM> flows. Air passing through the air guide <NUM> may be distributed to the first upper body <NUM> and the second upper body <NUM> through the distribution unit <NUM>. In other words, the air guide <NUM> may guide air flowing by the fan <NUM> to the distribution unit <NUM>, and the distribution unit <NUM> may guide air flowed from the air guide <NUM> to the first upper body <NUM> and the second upper body <NUM>. The aforementioned groove <NUM> (see to <FIG>) may form a part of an outer surface of the distribution unit <NUM>. Meanwhile, the distribution unit <NUM> may be referred to as a middle body, an inner body, or a tower base. For example, the first upper body <NUM> and the second upper body <NUM> may be symmetrical left and right.

The first upper body <NUM> may provide a first flow path 120P through which a part of air passing through the air guide <NUM> flows. The first flow path 120P may be formed in the inner space of the first upper body <NUM>. The second upper body <NUM> may provide a second flow path 130P through which the rest of the air passing through the air guide <NUM> flows. The second flow path 130P may be formed in the inner space of the second upper body <NUM>. The first flow path 120P and the second flow path 130P may be communicate with the flow path 140P of the distribution unit <NUM> and the flow path 160P of the air guide <NUM>.

Referring to <FIG> and <FIG>, a first slit <NUM> may discharge air flowing through the first flow path 120P to the space <NUM>. The first slit <NUM> may be adjacent to a rear end 120R of the first upper body <NUM> and may be formed to pass through the first boundary surface <NUM> of the first upper body <NUM>. The first slit <NUM> may be formed along the rear end 120R of the first upper body <NUM>. For example, the first slit <NUM> may be hidden from a user's gaze looking from a front direction to a rear direction of the blower <NUM>.

At this time, the first slit <NUM> may be formed to be inclined at a certain angle (acute angle) forward with respect to a vertical line extending in the up-down direction.

For example, the first slit <NUM> may be parallel to the rear end 120R of the first upper body <NUM>. For another example, the first slit <NUM> may not be parallel to the rear end 120R of the first upper body <NUM>, and a slope of the first slit <NUM> with respect to the vertical line may be greater than a slope of the rear end 120R.

Referring to <FIG> and <FIG>, a second slit <NUM> may discharge air flowing through the second flow path 130P (see <FIG>) to the space <NUM>. The second slit <NUM> may be adjacent to a rear end 130R of the second upper body <NUM> and may be formed to pass through the second boundary surface <NUM> of the second upper body <NUM>. The second slit <NUM> may be formed to extend along the rear end 130R of the second upper body <NUM>. For example, the second slit <NUM> may be hidden from the user's gaze looking from a front direction to a rear direction of the blower <NUM>.

At this time, the second slit <NUM> may be formed to be inclined at a certain angle (acute angle) forward with respect to the vertical line extending in the up-down direction.

For example, the second slit <NUM> may be parallel to the rear end 130R of the second upper body <NUM>. For another example, the second slit <NUM> may not be parallel to the rear end 130R of the second upper body <NUM>. In this case, the second slit <NUM> may be inclined at a first angle a1 (for example, <NUM> degrees) with respect to a vertical line V, and the rear end 130R may be inclined at a second angle a2 (for example, <NUM> degrees) which is smaller than the first angle a1 with respect to the vertical line V.

Meanwhile, the first slit <NUM> (see <FIG>) and the second slit <NUM> may face each other and may be symmetrical to each other.

Referring to <FIG> and <FIG> again, vanes <NUM>, <NUM> may be installed in the inner space of the first upper body <NUM> and the inner space of the second upper body <NUM> to guide a flow of air.

A first vane <NUM> may guide air rising from the first flow path 120P to the first slit <NUM>. The first vane <NUM> may be adjacent to the first slit <NUM> and may be fixed to the inner surface of the first upper body <NUM>. The first vane <NUM> may have a convex shape upward. The first vane <NUM> may include a plurality of first vanes <NUM> spaced apart from each other in the up-down direction. Each of the plurality of first vanes <NUM> may have one end adjacent to the first slit <NUM>, and the plurality of first vanes <NUM> may be spaced apart from each other along the first slit <NUM>. Each of the plurality of first vanes <NUM> may have different shapes.

For example, among the plurality of first vanes <NUM>, a curvature of the vane positioned at a relatively lower side may be greater than a curvature of a vane positioned at relatively an upper side. At this time, among the plurality of first vanes <NUM>, a position of the other end opposite to the one end of the vane positioned at relatively the lower side may be the same as or lower than the one end, and a position of the other end opposite to the one end of the vane positioned at relatively the upper side may be same as or higher than the one end.

Accordingly, the first vane <NUM> may smoothly guide the air rising from the first flow path 120P to the first slit <NUM>.

A second vane <NUM> may guide air rising from the second flow path 130P to the second slit <NUM>. The second vane <NUM> may be adjacent to the second slit <NUM> and may be fixed to the inner surface of the second upper body <NUM>. The second vane <NUM> may have a convex shape upward. The second vane <NUM> may include a plurality of second vanes <NUM> spaced apart from each other in the up-down direction. Each of the plurality of second vanes <NUM> may have one end adjacent to the second slit <NUM>, and the plurality of second vanes <NUM> may be spaced apart from each other along the second slit <NUM>. Each of the plurality of second vanes <NUM> may have different shapes.

For example, among the plurality of second vanes <NUM>, a curvature of the vane positioned at a relatively lower side may be greater than a curvature of a vane located at relatively an upper side. At this time, among the plurality of second vanes <NUM>, a position of the other end opposite to the one end of the vane positioned at relatively the lower side may be the same as or lower than the one end, and a position of the other end opposite to the one end of the vane positioned at relatively the upper side may be same as or higher than the one end.

Accordingly, the second vane <NUM> may smoothly guide the air rising from the second flow path 130P to the second slit <NUM>.

Referring to <FIG> and <FIG>, a damper <NUM> may be movably coupled to the first upper body <NUM> and/or the second upper body <NUM>. The damper <NUM> may protrude from the first upper body <NUM> and/or the second upper body <NUM> toward the space <NUM>. For example, the damper <NUM> may include a first damper 210a and a second damper 210b.

The first damper 210a may pass through a first slot <NUM> and protrude into the space <NUM>, or may pass through the first slot <NUM> and be inserted into the first upper body <NUM>. The first damper 210a may close the first slot <NUM> to prevent air flowing through the first flow path 120P from leaking to the outside through the first slot <NUM>. Here, the first slot <NUM> may be adjacent to the front end 120F of the first upper body <NUM> and may be formed to pass through the first boundary surface <NUM> of the first upper body <NUM>. The first slot <NUM> may be formed long along the front end 120F of the first upper body <NUM>.

For example, the first slot <NUM> may be parallel to the front end 120F. For another example, the first slot <NUM> may not be parallel to the front end 120F, and a slope of the first slot <NUM> with respect to the vertical line may be greater than a slope of the front end 120F. Meanwhile, the first slot <NUM> may be referred to as a first board slit.

The second damper 210b may pass through a second slot <NUM> and protrude into the space <NUM>, or may pass through the second slot <NUM> and be inserted into the second upper body <NUM>. The second damper 210b may close the second slot <NUM> to prevent air flowing through the second flow path 130P from leaking to the outside through the second slot <NUM>. Here, the second slot <NUM> may be adjacent to the front end 130F of the second upper body <NUM> and may be formed to pass through the second boundary surface <NUM> of the second upper body <NUM>. The second slot <NUM> may be formed long along the front end 130F of the second upper body <NUM>.

For example, the second slot <NUM> may be parallel to the front end 130F. For another example, the second slot <NUM> may not be parallel to the front end 130F, and a slope of the second slot <NUM> with respect to the vertical line may be greater than a slope of the front end 130F. Meanwhile, the second slot <NUM> may be referred to as a second board slit.

The first slot <NUM> and the second slot <NUM> may face each other, and the first damper 210a and the second damper 210b may come into contact with each other or be spaced apart from each other.

Accordingly, when the first damper 210a and the second damper 210b are located at the space <NUM>, the first damper 210a and the second damper 210b may cover at least a part of the front of the space <NUM> or closed.

Referring to <FIG>, a distance D between the front end 120F and the first slot <NUM> of the first upper body <NUM> may be the same as a distance D between the front end 130F and the second slot <NUM> of the second upper body <NUM>.

The first boundary surface <NUM> of the first upper body <NUM> and the second boundary surface <NUM> of the second upper body <NUM> may face each other and may form left and right boundaries of the space <NUM>. The first boundary surface <NUM> of the first upper body <NUM> may be convex to the right, and the second boundary surface <NUM> of the second upper body <NUM> may be convex to the left. In other words, a gap between the first boundary surface <NUM> of the first upper body <NUM> and the second boundary surface <NUM> of the second upper body <NUM> may decrease from the rear to the front and then increase again. Meanwhile, the gap may be a width of the space <NUM>.

A first gap B1 may be defined as a gap between the front end 120F of the first upper body <NUM> and the front end 130F of the second upper body <NUM>.

A second gap B2 may be defined as a gap between the rear end 120R of the first upper body <NUM> and the rear end 120R of the second upper body <NUM>. For example, the second gap B2 may be the same as or different from the first gap B1. A reference gap B0 may be a minimum of the gaps between the first boundary surface <NUM> of the first upper body <NUM> and the second boundary surface <NUM> of the second upper body <NUM>. For example, the reference gap B0 may be <NUM> to <NUM>.

For one example, in the front-rear direction, a gap between a center of the first boundary surface <NUM> of the first upper body <NUM> and a center of the second boundary surface <NUM> of the second upper body <NUM> may be the reference gap B0. For another example, in the front-rear direction, a gap between a part positioned in front of the center of the first boundary surface <NUM> of the first upper body <NUM> and a part positioned in front of the center of the second boundary surface <NUM> of the second upper body <NUM> may be the reference gap B0. For the other example, in the front-rear direction, a gap between a part positioned behind the center of the first boundary surface <NUM> of the first upper body <NUM> and a part positioned behind the center of the second boundary surface <NUM> of the second upper body <NUM> may be the reference gap B0.

In this case, a width of a rear part of the space <NUM> may be the second gap B2, a width of a center part of the space <NUM> may be the reference gap B0, and a width of the space <NUM> may decrease from the rear part to the central part. And, a width of a front part of the space <NUM> may be the first gap B1, and the width of the space <NUM> may increase from the center part toward the front part.

Referring to <FIG> and <FIG>, a damper assembly <NUM> including the damper <NUM> may be installed on the upper bodies <NUM> and <NUM>. The damper assembly <NUM> may include a first damper assembly 200a installed on the first upper body <NUM> and having a first damper 210a, and may include a second damper assembly 200b (not shown) installed on the second upper body <NUM> and having a second damper 210b. The first damper assembly 200a and the second damper assembly 200b may be symmetrical to each other in the left-right direction. Meanwhile, the damper assembly <NUM> may be referred to as an air flow converter.

The damper assembly <NUM> may include the above-described damper <NUM> and guide <NUM>. The damper <NUM> may be formed to be flat or curved. For example, the damper <NUM> may be a convex plate outwardly. In this case, the damper <NUM> may extend while drawing an arc of a constant curvature with respect to a center positioned inside an inner surface <NUM>. A front end 210F of the damper <NUM> may pass through the aforementioned slots <NUM> and <NUM>. The guide <NUM> may be coupled to an outer surface <NUM> of the damper <NUM> to guide the movement of the damper <NUM>. For example, the guide <NUM> may include a first guide 240a and a second guide 240b separated from each other in the up-down direction and having a same configuration.

Meanwhile, the damper <NUM> may be referred to as a board, and the guide <NUM> may be referred to as a board guide.

Referring to <FIG>, the damper assembly <NUM> may include a motor <NUM>, a power transmission member <NUM>, a light emitting member <NUM>, and a motor mount <NUM> in addition to the damper <NUM> and the guide <NUM> described above. At this time, the motor <NUM>, the power transmission member <NUM>, the light emitting member <NUM>, and the motor mount <NUM> may be connected or coupled to each of the first guide 240a and the second guide 240b described above.

The motor <NUM> may provide rotational force. The motor <NUM> may be an electric motor capable of adjusting a rotation direction, a rotation speed, and a rotation angle. The motor <NUM> may be fixed or coupled to the motor mount <NUM>. For example, the motor mount <NUM> may be fixed to the inner surfaces of the upper bodies <NUM> and <NUM> and coupled to a lower side of the motor <NUM> to support the motor <NUM>.

The power transmission member <NUM> may include a pinion <NUM> and a rack <NUM>. The pinion <NUM> may be fixed to a rotation shaft of the motor <NUM> and may rotate together with the rotation shaft. The rack <NUM> may engage the pinion <NUM>. The rack <NUM> may be fixed or coupled to an inner surface <NUM> of the damper <NUM>. For example, the rack <NUM> may have a shape corresponding to a shape of the damper <NUM>. In other words, the rack <NUM> may extend by drawing an arc with a curvature equal to or greater than a curvature of the damper <NUM>, and a gear-tooth engaged the pinion <NUM> may face the inner space of the upper bodies <NUM> and <NUM>.

Accordingly, driving force of the motor <NUM> may be transmitted to the damper <NUM> through the power transmission member <NUM>, so that the damper <NUM> may move along a circumferential direction of the damper <NUM>. Meanwhile, the damper <NUM> may include a transparent material, and the light emitting member <NUM> may be coupled to the damper <NUM> to provide light. For example, the light emitting member <NUM> may be a LED. In this case, whether or not the light emitting member <NUM> is operated or light emission color may be adjusted in response to a movement of the damper <NUM>.

Meanwhile, the guide <NUM> may include a moving guide <NUM>, a fixed guide <NUM>, and a friction reducing member <NUM>.

The movement guide <NUM> may be coupled to the damper <NUM> and/or the rack <NUM> and may move together with the damper <NUM> and the rack <NUM>. For example, the moving guide <NUM> may be fixed to an outer surface <NUM> of the damper <NUM> and may be extended while drawing an arc with a curvature equal to or less than the curvature of the damper <NUM>. At this time, a length of the moving guide <NUM> may be smaller than a length of the damper <NUM>.

The fixed guide <NUM> may be coupled to the moving guide <NUM> at an outside of the moving guide <NUM> to support the moving guide <NUM>. In this case, the moving guide <NUM> may be disposed between the damper <NUM> and the fixed guide <NUM>.

A guide groove <NUM> may be formed at an inner surface of the fixed guide <NUM>, and the moving guide <NUM> may be movably inserted into the guide groove <NUM>. For example, the guide groove <NUM> may be formed by drawing an arc with a curvature equal to the curvature of the moving guide <NUM>, and a length of the guide groove <NUM> may be greater than the length of the moving guide <NUM>. In this case, one end 245a of the guide groove <NUM> may limit rotation or movement of the moving guide <NUM> in a first direction. Here, the first direction may be a direction in which the damper <NUM> protrudes toward the space <NUM>. In addition, the other end 245b of the guide groove <NUM> may limit rotation or movement of the moving guide <NUM> in a second direction. Here, the second direction, as a direction opposite to the first direction, may be opposite to a direction in which the damper <NUM> protrudes toward the space <NUM>.

The friction reducing member <NUM> may reduce friction due to the movement of the moving guide <NUM> with respect to the fixed guide <NUM>. For example, the friction reducing member <NUM> may be a roller that is rotatably provided with respect to a central axis parallel in the up-down direction. The friction reducing member <NUM> may be coupled to the moving guide <NUM>, and at least a part of the friction reducing member <NUM> may protrude in a radial direction of the moving guide <NUM> to be movably coupled to the fixed guide <NUM>. For example, the friction reducing member <NUM> may have elasticity force and may be supported by the fixed guide <NUM>. For example, the friction reducing member <NUM> may include a first friction reducing member 246a coupled to one side of the moving guide <NUM> and a second friction reducing member 246b coupled to the other side.

Accordingly, the guide <NUM> may minimize friction or operational noise caused by the movement of the damper <NUM> and the moving guide <NUM> while guiding rotation or movement of the damper <NUM> and the moving guide <NUM>.

Referring to <FIG> and <FIG>, a first discharge body SL may be provided at a rear part of the first upper body <NUM> and may provide a first opening SL-<NUM>. A second discharge body SR may be provided at a rear part of the second upper body <NUM> and may provide a second opening SR-<NUM>. The first opening SL-<NUM> and the second opening SR-<NUM> may face each other. For example, the first opening SL-<NUM> may be formed by inclining or bending toward a front of the second opening SR-<NUM>. For example, the second opening SR-<NUM> may be formed by inclining or bending toward a front of the first opening SL-<NUM>.

The first discharge body SL may include a first part <NUM> and a second part <NUM>. The first part <NUM> and the second part <NUM> may be spaced apart from each other, and the first opening SL-<NUM> may be formed between the first part <NUM> and the second part <NUM>. The space <NUM> may communicate with the first flow path 120P through the first opening SL-<NUM>. And, an outlet end of the first opening SL-<NUM> may be provided as the first slit <NUM>. At this time, an inlet end of the first opening SL-<NUM> may be located at the first flow path 120P.

In this case, a first border 120Sa may form a front boundary of the first slit <NUM>, a second border 120Sb may form a rear boundary of the first slit <NUM>, a third border 120Sc may form an upper boundary of the first slit <NUM>, and a fourth border 120Sd may form a lower boundary of the first slit <NUM>. Meanwhile, the first opening SL-<NUM> may be referred to as a first channel.

The first part <NUM> may be provided at a part that forms the first boundary surface <NUM> of the first upper body <NUM>. The first part <NUM> may be bent and extended from the first boundary surface <NUM> toward the first flow path 120P. In this case, a cross section 125a of the first part <NUM> may have a shape bent by approximately <NUM> degrees from the first boundary surface <NUM>.

The second part <NUM> may be provided at a part that forms the first boundary surface <NUM> of the first upper body <NUM>. The second part <NUM> may be positioned behind the first part <NUM>. The second part <NUM> may form the rear end 120R of the first upper body <NUM>. The second part <NUM> may form a part of the first boundary surface <NUM>. The second part <NUM> may protrude from the first boundary surface <NUM> toward the first flow path 120P. In other words, a thickness of the second part <NUM> may increase toward the rear. In this case, a cross-section 126a of the second part <NUM> may approximatively have a wedge shape, and a part of the second part <NUM> may be coupled to a part that form the first outer surface <NUM> of the first upper body <NUM>.

The first opening SL-<NUM> may be formed between an outer surface 125b of the first part <NUM> and an inner surface 126b of the second part <NUM>. The outer surface 125b of the first part <NUM> may have a first curvature greater than a curvature of the first boundary surface <NUM>. An inner surface 126b of the second part <NUM> may have a second curvature greater than a curvature of the first boundary surface <NUM>. At this time, the first curvature may be greater than the second curvature. And, a center of the curvature of the outer surface 125b and a center of the curvature of the inner surface 126b may be positioned at the first flow path 120P. And, the center of the curvature of the outer surface 125b may be positioned in front of a right side of the center of the curvature of the inner surface 126b. Meanwhile, the outer surface 125b of the first part <NUM> may be referred to as a first discharge surface, and the inner surface 126b of the second part <NUM> may be referred to as a second discharge surface.

A first gap 120Ga may be defined as a gap between one side of the inner surface 126b and one side of the outer surface 125b. A second gap 120Gb may be defined as a gap between the other side of the inner surface 126b and the outer surface 125b closest to the other side of the inner surface 126b. A third gap 120Gc may be defined as a gap between the other side of the inner surface 126b and the other side of the outer surface 125b. At this time, the other side of the inner surface 126b may be provided as a second border 120Sb forming a rear boundary of the first slit <NUM>, and the other side of the outer surface 125b may be provided as a first border 120Sa forming a front boundary of the first slit <NUM>.

In this case, the first gap 120Ga may mean a gap of an inlet end of the first opening SL-<NUM>, the second gap 120Gb may mean a minimum gap between the inlet end and an outlet end of the first opening SL-<NUM>, and a third gap 120Gc may mean a gap of the outlet end of the first opening SL-<NUM>. And, the third gap120Gc may mean a width or gap of the first slit <NUM>. In addition, the second gap 120Gb may be smaller than the first gap 120Ga, and the third gap 120Gc may be larger than the second gap 120Gb.

Accordingly, the width or gap of the first opening SL-<NUM> may decrease from an inlet to an outlet of the first opening SL-<NUM> and then increase again. At this time, a section in which the width or gap of the first opening SL-<NUM> is reduced may be referred to as a tapered section or a converging section.

And, air accelerated while passing through the tapered section may be smoothly guided to the first boundary surface <NUM> along the outer surface 125b of the first part <NUM>. That is, a flow direction of the air discharged from the first flow path 120P to the space <NUM> may be smoothly switched from a rear direction to a front direction through the first opening SL-<NUM>.

The second discharge body SR may include a first part <NUM> and a second part <NUM>. The first part <NUM> and the second part <NUM> may be spaced apart from each other, and the second opening SR-<NUM> may be formed between the first part <NUM> and the second part <NUM>. The space <NUM> may communicate with the second flow path 130P through the second opening SR-<NUM>. And, an outlet end of the second opening SR-<NUM> may be provided as the second slit <NUM>. At this time, an inlet end of the second opening SR-<NUM> may be positioned at the second flow path 130P.

In this case, a first border 130Sa may form a front boundary of the second slit <NUM>, a second border 130Sb may form a rear boundary of the second slit <NUM>, a third border 130Sc may form an upper boundary of the second slit <NUM>, and a fourth border 130Sd may form a lower boundary of the second slit <NUM>. Meanwhile, the second opening SR-<NUM> may be referred to as a second channel.

The first part <NUM> may be provided at a part that forms the second boundary surface <NUM> of the second upper body <NUM>. The first part <NUM> may be bent and extended from the second boundary surface <NUM> toward the second flow path 130P. In this case, a cross section 135a of the first part <NUM> may have a shape bent by approximately <NUM> degrees from the second boundary surface <NUM>.

The second part <NUM> may be provided at a part that forms the second boundary surface <NUM> of the second upper body <NUM>. The second part <NUM> may be positioned behind the first part <NUM>. The second part <NUM> may form the rear end 130R of the second upper body <NUM>. The second part <NUM> may form a part of the second boundary surface <NUM>. The second part <NUM> may protrude from the second boundary surface <NUM> toward the second flow path 130P. In other words, a thickness of the second part <NUM> may increase toward the rear. In this case, a cross-section 136a of the second part <NUM> may approximatively have a wedge shape, and a part of the second part <NUM> may be coupled to a part that form the second outer surface <NUM> of the second upper body <NUM>.

The second opening SR-<NUM> may be formed between an outer surface 135b of the first part <NUM> and an inner surface 136b of the second part <NUM>. The outer surface 135b of the first part <NUM> may have a first curvature greater than a curvature of the second boundary surface <NUM>. An inner surface 136b of the second part <NUM> may have a second curvature greater than a curvature of the second boundary surface <NUM>. At this time, the first curvature may be greater than the second curvature. And, a center of the curvature of the outer surface 135b and a center of the curvature of the inner surface 136b may be positioned at the second flow path 130P. And, the center of the curvature of the outer surface 135b may be positioned in front of a left side of the center of the curvature of the inner surface 136b. Meanwhile, the outer surface 135b of the first part <NUM> may be referred to as a first discharge surface, and the inner surface 136b of the second part <NUM> may be referred to as a second discharge surface.

A first gap 130Ga may be defined as a gap between one side of the inner surface 136b and one side of the outer surface 135b. A second gap 130Gb may be defined as a gap between the other side of the inner surface 136b and the outer surface 135b closest to the other side of the inner surface 136b. A third gap 130Gc may be defined as a gap between the other side of the inner surface 136b and the other side of the outer surface 135b. At this time, the other side of the inner surface 136b may be provided as a second border 130Sb forming a rear boundary of the second slit <NUM>, and the other side of the outer surface 135b may be provided as a first border 130Sa forming a front boundary of the second slit <NUM>.

In this case, the first gap 130Ga may mean a gap of an inlet end of the second opening SR-<NUM>, the second gap 130Gb may mean a minimum gap between the inlet end and an outlet end of the second opening SR-<NUM>, and a third gap 130Gc may mean a gap of the outlet end of the second opening SR-<NUM>. And, the third gap 120Gc may mean a width or gap of the first slit <NUM>. In addition, the second gap 130Gb may be smaller than the first gap 130Ga, and the third gap 130Gc may be larger than the second gap 130Gb.

Accordingly, the width or gap of the second opening SR-<NUM> may decrease from an inlet to an outlet of the second opening SR-<NUM> and then increase again. At this time, a section in which the width or gap of the second opening SR-<NUM> is reduced may be referred to as a tapered section or a converging section.

And, air accelerated while passing through the tapered section may be smoothly guided to the second boundary surface <NUM> along the outer surface 135b of the first part <NUM>. That is, a flow direction of the air discharged from the second flow path 130P to the space <NUM> may be smoothly switched from a rear direction to a front direction through the second opening SR-<NUM>.

Accordingly, a part of the air flowing by the fan <NUM> (see <FIG>) may be discharged to the space <NUM> through the first slit <NUM>, the rest of the air may be discharged to the space <NUM> through the second slit <NUM>, and so air may be mixed in the space <NUM>. And, due to the coanda effect, the air discharged to the space <NUM> may flow forward along the first boundary surface <NUM> of the first upper body <NUM> and the second boundary surface <NUM> of the second upper body <NUM>.

Referring to <FIG> and <FIG>, in a first state of the blower <NUM>, a front end 210F of the damper <NUM> may be inserted or hidden in the slots <NUM> and <NUM>. In this case, the front end 210F of the damper <NUM> may form a continuous surface on the boundary surfaces <NUM>, <NUM>.

Accordingly, air discharged to the space <NUM> in response to the operation of the fan <NUM> (see <FIG>) may flow forward along the boundary surfaces <NUM>, <NUM> of the upper bodies <NUM>,<NUM>. At this time, air flowing forward may be dispersed the left and right along the curvature of the boundary surfaces <NUM>,<NUM>. And, such a flow of air may form airflow in which air around the upper bodies <NUM>,<NUM> entrained into the space <NUM> or flowing forward along the outer surfaces <NUM>,<NUM>. As a result, the blower <NUM> may provide airflow with rich volume to a user or the like.

Referring to <FIG> and <FIG>, in a second state of the blower <NUM>, a part of the first damper 210a may pass through the first slot <NUM> and may be positioned in the space <NUM>, and a part of the second damper 210b may pass through the second slot <NUM> and may be positioned in the space <NUM>. In this case, a front end 210F of the first damper 210a and a front end 210F of the second damper 210b may be contact in with each other.

Accordingly, air discharged to the space <NUM> in response to the operation of the fan <NUM> (see <FIG>) may flow forward along the boundary surfaces <NUM>,<NUM> of the upper bodies <NUM>, <NUM>, and may rise upward blocked by the first damper 210a and the second damper 210b.

Meanwhile, the damper <NUM> may control a wind direction of air discharged from the blower <NUM> by adjusting a length of the damper <NUM> protruding from the slot <NUM> or a position of the front end 210F of the damper <NUM> with respect to a reference line L' extending in the front and rear direction.

Referring to <FIG>, in the first state of the blower <NUM>, a change in a width of discharge airflow of the blower <NUM> according to a discharge angle (theta A, see <FIG>) may be confirmed. Here, the discharge angle (theta A) may be defined as an angle between a tangent to the front end 120F of the first upper body <NUM> or the front end 130F of the second upper body <NUM> and a reference line L-L' extending in the front and rear direction. And, the width of the discharge airflow, as a left and right width of airflow discharged forward from the blower <NUM>, may be the left and right width of airflow measured or secured at a position spaced from the blower <NUM> forward by a predetermined distance.

It may be confirmed that as the discharge angle (theta A) decreases, the width of discharge airflow decreases, and as the discharge angle (theta A) increases, the width of the discharge airflow increases. However, in a range in which the discharge angle (theta A) exceeds <NUM> degrees, it may be confirmed that the width of discharge airflow decreases again as the discharge angle (theta) increases. Accordingly, it may be desirable to set the discharge angle (theta A) from <NUM> degrees to <NUM> degrees.

In accordance with an aspect of the present disclosure, provided is a blower including: a fan causing airflow; a lower body forming a lower space therein in which the fan is disposed, and having a suction hole through which air passes; a first upper body positioned above the lower body, and forming a first inner space communicating with the lower space of the lower body; a second upper body positioned above the lower body, and forming a second inner space communicating with the lower space of the lower body, the second upper body is spaced apart from the first upper body; and a space formed between the first upper body and the second upper body, and opened in the front-rear direction, wherein the first upper body comprises a first slit formed through the first upper body such that air in the first inner space is discharged into the space, and the second upper body comprises a second slit formed through the second upper body such that air in the second inner space is discharged into the space.

In accordance with another aspect of the present disclosure, the first upper body may include a first boundary surface facing the space, and at which the first slit is formed, the second upper body may include a second boundary surface facing the space, and at which the second slit is formed, and the space may be disposed between the first boundary surface and the second boundary surface.

In accordance with another aspect of the present disclosure, each of the first boundary surface and the second boundary surface may be a curved surface, the first upper body may include a first outer surface being opposite to the first boundary surface with respect to the first inner space, and having a curvature greater than a curvature of the first boundary surface, the second upper body may include a second outer surface being opposite to the second boundary surface with respect to the second inner space, and having a curvature greater than a curvature of the second boundary surface, the first boundary surface may be in contact with the first outer surface and form a front end and a rear end of the first upper body, and the second boundary surface may be in contact with the second outer surface and form a front end and a rear end of the second upper body.

In accordance with another aspect of the present disclosure, the first upper body may be spaced in a left direction from the second upper body, the first boundary surface may be convex in a right direction, the first outer surface may be convex in the left direction, the second boundary surface may be convex in the left direction, the second outer surface may be convex in the right direction, and a gap between the first boundary surface and the second boundary surface may gradually decrease from a rear of the space to a center of the space, and may gradually increase from the center of the space to a front of the space.

In accordance with another aspect of the present disclosure, the first slit may be adjacent to the rear end of the first upper body, and may be formed long along the rear end of the first upper body, the second slit may be adjacent to the rear end of the second upper body, and may be formed long along the rear end of the second upper body.

In accordance with another aspect of the present disclosure, the first slit and the second slit may be inclined at a first angle with respect to a vertical line, and the rear end of the first upper body and the rear end of the second upper body may be inclined at a second angle less than the first angle with respect to the vertical line.

In accordance with another aspect of the present disclosure, the blower may further comprise a first opening being adjacent to a rear side of the first boundary surface, and having an inlet end positioned in the first inner space and an outlet end forming the first slit, and a second opening being adjacent to a rear side of the second boundary surface, and having an inlet end positioned in the second inner space and an outlet end having the second slit.

In accordance with another aspect of the present disclosure, the first opening may be formed to be inclined or bent toward a front of the second opening, the second opening may be formed to be inclined or bent toward a front of the first opening, and the second slit may face the first slit.

In accordance with another aspect of the present disclosure, the first inner space may form a first flow path through which air discharged from the fan flows, the second inner space may form a second flow path through which air discharged from the fan flows, the first upper body may further include a first inner sleeve being coupled to an inner surface of the first upper body and defining a boundary of the first flow path, the second upper body may further include a second inner sleeve being coupled to an inner surface of the second upper body and defining a boundary of the second flow path.

In accordance with another aspect of the present disclosure, the first opening may be formed between one end and other end of the first inner sleeve, the second opening may be formed between one end and other end of the second inner sleeve, and the second inner sleeve may be symmetrical to the first inner sleeve in the left-right direction.

In accordance with another aspect of the present disclosure, the one end of the first inner sleeve may be positioned in front of the other end of the first inner sleeve, and the first inner sleeve may further include a first discharge portion extending from a center of the space at an acute angle with respect to a reference line extending in the front-rear direction, and forming the one end of the first inner sleeve, and a second discharge portion facing the first discharge portion, and forming the other end of the first inner sleeve.

In accordance with another aspect of the present disclosure, the first opening may include a tapered section at which a gap between the first discharge portion and the second discharge portion gradually decreases at a flow direction of air passing through the first opening.

In accordance with another aspect of the present disclosure, the first discharge portion may further include a first curved surface facing the first opening, and extending and forming an arc at a constant curvature with respect to a center of curvature positioned in front of the first discharge portion, the second discharge portion may further include a second discharge surface facing the first opening, and extending and forming an arc at a constant curvature with respect to a center of curvature positioned in front of the second discharge portion, a curvature of the first curved surface may be greater than a curvature of the second discharge surface, and the tapered section may be formed between the first curved surface and the second discharge surface.

In accordance with another aspect of the present disclosure, the first discharge portion may further include a second curved surface facing the first opening, being connected to the first curved surface, and extending and forming an arc at a constant curvature with respect to a center of curvature positioned in front of the first discharge portion, a curvature of the second curved surface may be the same as the curvature of the second discharge surface, the inlet end of the first opening may be formed between the first curved surface and the second discharge surface, and the outlet end of the first opening may be formed between the second curved surface and the second discharge surface.

In accordance with another aspect of the present disclosure, the first opening may further include a curved section being connected to the tapered section, and having a constant gap between the first discharge portion and the second discharge portion.

In accordance with another aspect of the present disclosure, the first upper body may further include a first discharge body being disposed at a rear part of the first upper body and having the first opening, the second upper body may further include a second discharge body being disposed at a rear part of the second upper body and having a first part and a second part spaced apart from each other, wherein the first part and the second part define a boundary of the second opening, and the second discharge body may be symmetrical to the first discharge body in the left-right direction.

In accordance with another aspect of the present disclosure, the first discharge body may further include a first part bent and extended from the first boundary surface toward the first inner space, and a second part spaced forward from the first part, and forming a part of the first boundary surface, and the first opening may be formed between the first part and the second part.

In accordance with another aspect of the present disclosure, the first part may further includes a first discharge surface facing the first opening, and extending and forming an arc at a constant curvature, the second part may further include a second discharge surface facing the first opening, and extending and forming an arc at a constant curvature, and a curvature of the first discharge surface may be larger than a curvature of the second discharge surface.

In accordance with another aspect of the present disclosure, the first opening may include a tapered section at which a gap between the first discharge surface and the second discharge surface gradually decreases at a flow direction of air passing through the first opening.

In accordance with another aspect of the present disclosure, the inlet end of the first opening may be formed between one side of the first discharge surface and one side of the second discharge surface, the outlet end of the first opening may be formed between other side of the first discharge surface and other side of the second discharge surface, and a minimum gap between the first discharge surface and the second discharge surface may be formed between a point between one side and the other side of the first discharge surface, the other side of the second discharge surface.

The effect of the blower according to the present disclosure will be described as follows.

According to at least one of the embodiments of the present disclosure, the blower capable of blowing air using the coanda effect may be provided.

According to at least one of the embodiments of the present disclosure, air discharged from the slit formed at the rear part of the blower may be smoothly guided forward, thereby minimizing air volume loss or noise generation due to airflow.

According to at least one of the embodiments of the present disclosure, the blower capable of forming airflow blown in a wide range may be provided.

According to at least one of the embodiments of the present disclosure, the blower capable of forming various airflow such as diffused wind or rising wind may be provided.

Certain embodiments or other embodiments of the disclosure described above are not mutually exclusive or distinct from each other. Any or all elements of the embodiments of the disclosure described above may be combined or combined with each other in configuration or function.

For example, a configuration "A" described in one embodiment of the disclosure and the drawings and a configuration "B" described in another embodiment of the disclosure and the drawings may be combined with each other. Namely, although the combination between the configurations is not directly described, the combination is possible except in the case where it is described that the combination is impossible.

Claim 1:
A blower (<NUM>) comprising:
a lower body (<NUM>; <NUM>) having a suction hole (<NUM>; <NUM>) formed through a side surface of the lower body (<NUM>; <NUM>);
a fan (<NUM>) causing airflow and disposed in the lower body (<NUM>);
a first upper body (<NUM>; <NUM>) positioned above the lower body (<NUM>; <NUM>), elongated long in the up-down direction;
a second upper body (<NUM>; <NUM>) positioned above the lower body (<NUM>; <NUM>), elongated long in the up-down direction, wherein the second upper body (<NUM>; <NUM>) is spaced apart laterally from the first upper body (<NUM>; <NUM>);
a space (<NUM>; <NUM>) formed between the first upper body (<NUM>; <NUM>) and the second upper body (<NUM>; <NUM>), wherein the space (<NUM>) is opened in front-rear direction;
a first slit (<NUM>; <NUM>) discharging air of inner space of the first upper body (<NUM>; <NUM>) to the space (<NUM>; <NUM>); and
a second slit (<NUM>; <NUM>) discharging air of inner space of the second upper body (<NUM>; <NUM>) to the space (<NUM>; <NUM>);
wherein the first upper body (<NUM>; <NUM>) includes a first boundary surface (<NUM>; <NUM>) toward the space (<NUM>; <NUM>) and defining a part of a boundary of the space (<NUM>; <NUM>), and the first upper body (<NUM>; <NUM>) includes a first outer surface (<NUM>; <NUM>) opposed the first boundary surface (<NUM>; <NUM>), wherein the second upper body (<NUM>; <NUM>) includes a second boundary surface (<NUM>; <NUM>) toward the space (<NUM>; <NUM>) and defining a part of a boundary of the space (<NUM>; <NUM>), and the second upper body (<NUM>; <NUM>) includes a second outer surface (<NUM>; <NUM>) opposed the second boundary surface (<NUM>; <NUM>),
wherein the first outer surface (<NUM>; <NUM>) is inclined in a direction toward the space (<NUM>; <NUM>) with respect to a vertical line extending in the up-down direction,
wherein the second outer surface (<NUM>; <NUM>) is inclined in a direction toward the space (<NUM>; <NUM>) with respect to a vertical line extending in the up-down direction,
wherein the first boundary surface (<NUM>) and the second boundary surface (<NUM>) face each other and are convex toward each other,
wherein the first outer surface (<NUM>) is convex and opposes the first boundary surface (<NUM>), and
wherein the second outer surface (<NUM>) is convex and opposes the second boundary surface (<NUM>).