KR102057957B1 - turbo fan and ceiling type air conditioner using thereof - Google Patents

Abstract

Turbo fan according to the present invention, the main plate is rotated by the power provided by the fan motor; A blade having one end connected to the main plate to perform a rotational movement; And a shroud that connects the other end of the blade and has an inner circumferential portion and an outer circumferential portion, wherein the shroud is installed on the inner circumferential portion and guides a movement direction of air; And a plurality of curved portions having one side connected to the guide part and the other side connected to the outer circumferential part and having a predetermined curvature.
Ceiling type air conditioner according to the present invention, the case is formed in the appearance, the inlet is formed to suck the indoor air; A turbo fan provided inside the case to change a moving direction of air passing through the suction port; And a heat exchanger disposed outside the turbo fan, wherein the turbo fan comprises: an abacus rotated by power provided by the fan motor; A blade having one end connected to the main plate to perform a rotational movement; A shroud that connects the other end of the blade and has an inner circumference and an outer circumference, wherein the shroud is installed on the inner circumference and guides movement of air into the turbofan; And a plurality of curved portions having one side connected to the guide part and the other side connected to the outer circumferential part and having a predetermined curvature.

Description

Turbo fan and ceiling type air conditioner using

The present invention relates to a turbofan and a ceiling type air conditioner using the same.

In general, the ceiling type air conditioner is a device that is embedded in the indoor ceiling to allow the indoor air to flow in and then the heat exchanged air is discharged from the ceiling to the room. In the ceiling type air conditioner, air may be sucked through a suction port disposed in the center, and the sucked air may be air-conditioned by a heat exchanger disposed in the ceiling type air conditioner. The air-conditioned air is discharged into the room through the discharge part disposed at the edge of the ceiling air conditioner, thereby controlling the temperature and humidity of the indoor space.

Specifically, the air sucked through the inlet may be guided by a turbo fan disposed inside the ceiling air conditioner. That is, the turbo fan may flow air from the axial direction with respect to the turbo fan and discharge the air in the radial direction of the turbo fan.

1 is a perspective view of a turbofan according to the prior art.

Referring to FIG. 1, the turbofan 1 according to the related art is radially arranged on the main plate 10 and the main plate 10 that are rotated by the power provided by the motor, and integrally formed with the main plate 10. It may include a plurality of blades 20 and the shroud 30 is coupled to the end of the blade 20 so as to face one surface of the main plate (10).

The turbo fan 1 may include a hub 11 accommodating the motor therein, a boss 12 provided with shaft holes at the center of the hub 11 so as to be axially coupled with the motor; It may further include a through portion 13 disposed on the surface of the hub 11 and formed to cool the motor. The through part 13 may lower the temperature of the motor by allowing cool air to flow into the motor.

The shroud 30 may have an inner circumferential edge 31 and an outer circumferential edge 32 so that air is introduced into the turbofan 1 and discharged in a radial direction. An air inlet 33 is formed at a central portion of the shroud 30, and a discharge port 34 for discharging air sucked in the circumferential direction between the main plate 10 and the shroud 30. Can be formed.

According to the related art, the air sucked into the turbo fan 1 through the suction port 33 may be discharged to the outside of the turbo fan 1 through the discharge port 34. The discharge hole 34 may be defined as a space between the shroud 30 and the main plate 10.

However, when the operation mode of the ceiling type air conditioner is changed or the ceiling type air conditioner is operated for a long time, the amount of air introduced into the turbofan 1 through the intake port 33 may increase. Therefore, when the sucked air is discharged to the outside through the discharge port 34, a large amount of air must be discharged in a predetermined area, there is a problem that the flow noise of the air is generated.

An object of the present invention relates to a turbo fan and a ceiling type air conditioner using the same for reducing the noise of air flow when the air sucked into the turbo fan is discharged to the outside of the turbo fan.

Turbo fan according to the present invention, the main plate is rotated by the power provided by the fan motor; A blade having one end connected to the main plate to perform a rotational movement; And a shroud that connects the other end of the blade and has an inner circumferential portion and an outer circumferential portion, wherein the shroud is installed on the inner circumferential portion and guides a movement direction of air; And a plurality of curved parts having one side connected to the guide part and the other side connected to the outer circumferential part and having a set curvature, wherein the curved part comprises: a mountain part disposed to be spaced apart from the main plate; A curved portion disposed closer to the main plate than the peak portion; And an inclined portion connecting the peak portion with the curved portion, the peak portion with the outer peripheral portion, the peak portion with the guide portion, and having a set curvature, wherein the peak portion is located farther from the main plate than the outer peripheral portion.
Ceiling type air conditioner according to the present invention, the case is formed in the appearance, the inlet is formed to suck the indoor air; A turbo fan positioned inside the case and changing a moving direction of air passing through the inlet; And a heat exchanger disposed outside the turbo fan, wherein the turbo fan comprises: an abacus rotated by power provided by the fan motor; A blade having one end connected to the main plate to perform a rotational movement; A shroud that connects the other end of the blade and has an inner circumference and an outer circumference, wherein the shroud is installed on the inner circumference and guides movement of air into the turbofan; And a plurality of curved parts having one side connected to the guide part and the other side connected to the outer circumferential part and having a set curvature, wherein the curved part comprises: a mountain part disposed to be spaced apart from the main plate; A curved portion disposed closer to the main plate than the peak portion; And an inclined portion connecting the peak portion with the curved portion, the peak portion with the outer peripheral portion, the peak portion with the guide portion, and having a set curvature, wherein the peak portion is located farther from the main plate than the outer peripheral portion.

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According to the present invention, there is an advantage of additionally securing a flow space of air discharged from the turbofan.

In addition, by changing the shape of the shroud so that the curved portion and the peak portion is formed there is an effect that can prevent the pressure rises in the turbofan.

Therefore, there is an effect that can reduce the flow noise of the air discharged from the turbo fan.

1 is a perspective view of a turbofan according to the prior art;
Figure 2 is a perspective view of the indoor unit of the ceiling air conditioner according to the present invention.
Figure 3 is a cross-sectional view of the indoor unit of the ceiling air conditioner according to the present invention.
4 is a perspective view of a turbofan according to the present invention;
5 is a plan view of a turbofan according to the present invention;
6 is a front view of a turbofan according to the present invention;
7 is a view schematically showing the flow of air through the ceiling air conditioner according to the present invention.
8 is a graph showing the correlation between the air volume and the noise when the turbo fan according to the present invention applied to the ceiling air conditioner.

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

Figure 2 is a perspective view of the indoor unit of the ceiling air conditioner according to the present invention, Figure 3 is a cross-sectional view of the indoor unit of the ceiling air conditioner according to the present invention.

2 and 3, the ceiling type air conditioner according to the present invention includes an outdoor unit (not shown) installed in an outdoor space, an indoor unit 100 installed in an indoor space, and the outdoor unit (not shown) and the indoor unit 100. ), And a refrigerant pipe (not shown) through which the refrigerant is moved.

The indoor unit 100 includes a case 105 forming an appearance, a turbo fan 200 provided inside the case 105, a fan motor 120 coupled to the turbo fan 200 and providing power. It may include a heat exchanger 130 provided on the outside of the fan motor 120.

The case 105 may include a main body 101 forming a side surface and a front panel 102 coupled to the main body 101 and forming a front surface thereof.

In addition, the main body 101 may be installed on an indoor ceiling, and a lower portion thereof may be opened to communicate with the suction port 150 formed on the front surface of the front panel 102. The main body 101 is preferably installed on the indoor ceiling in consideration of space utilization or aesthetics, but the installation space of the main body 101 is not limited thereto. For example, the main body 101 may be installed on an indoor side wall.

The front panel 102 may be coupled to the bottom of the main body 101 to be detachable. In addition, the front panel 102 may be disposed to be exposed to the room to suck or discharge air into the indoor unit 100. The front panel 102 may cover an open portion of the body 101. For example, the front panel 102 may have a rectangular plate shape to cover the opening of the main body 101. In addition, the front panel 102 may include an inlet port 150 for sucking indoor air and a discharge port 140 for discharging air into the room.

The suction port 150 may be disposed at a central portion of the front panel 102. In addition, the discharge ports 140 may be formed to be symmetrical to the outer four sides of the suction port 150, respectively. The suction port 150 may be formed in a grill structure, and the discharge port 140 may have a rectangular structure having a predetermined width and length. However, the shape of the suction port 150 and the discharge port 140 is not limited thereto.

In addition, a filter 190 may be provided inside the front panel 102 to remove various foreign matters contained in the air sucked into the main body 101 through the suction port 150.

The turbo fan 200, the hub 112 is connected to the rotating shaft of the fan motor 120, the main plate 115 rotated by the fan motor 120, one end is connected to the main plate 115 and the main plate A plurality of blades 400 disposed at regular intervals along the circumferential direction on the 115 and a shroud 300 disposed to face the main plate 115 to connect the other ends of the plurality of blades 400. Can be. The shroud 300 may guide the inflow of air into the inlet 150 when the turbo fan 200 is rotated.

The shroud 300 may include a plurality of peaks 330 protruding upward from one surface of the shroud 300 and a plurality of curved parts 340 disposed between the plurality of peaks 330. have. That is, the shroud 300 according to the present invention may be configured in a three-dimensional shape.

The turbo fan 200 may be installed at a position corresponding to the suction port 150 to improve the suction efficiency of the air sucked into the main body 101. In detail, referring to FIG. 3, the turbo fan 200 may be installed to correspond to the suction port 150 in the vertical direction.

In addition, the turbo fan 200 may serve to blow the indoor air sucked through the suction port 150 to the heat exchanger 130.

The heat exchanger 130 may be configured to surround the outside of the turbo fan 200. For example, the heat exchanger 130 may be configured in a rectangular structure so as to correspond to the side shape of the main body 101. The heat exchanger 130 may serve to heat exchange the air sucked into the main body 101 through the turbo fan 200. Specifically, in the cooling operation of the ceiling type air conditioner, the temperature of the air passing through the heat exchanger 130 decreases, and in the heating operation of the ceiling type air conditioner, the temperature of the air passing through the heat exchanger 130. Can be raised.

A drain plate 131 may be disposed below the heat exchanger 130 to accommodate condensate generated during the heat exchange process between the refrigerant passing through the heat exchanger 130 and the indoor air. In addition, a drain pipe (not shown) may be connected to the drain plate 131 to discharge the condensed water collected by the drain plate 131 to the outside.

A guide flow path 181 may be formed at an inner outer portion of the main body 101 to guide a moving direction of air. Specifically, the guide flow path 181 may guide the air heat exchanged by the heat exchanger 130 to the discharge port 140.

The discharge port 140 may be provided with a vane 141 for controlling the movement direction of air. The vane 141 may be configured to be rotatable at a predetermined angle. In addition, the vane 141 may be installed to be inclined outward from the front surface of the front panel 102. This is to provide a wind having a uniform wind speed in all parts of the room. However, the rotation direction of the vane 141 is not limited thereto. In addition, the arrangement, configuration and manner of operation of the vane 141 is not limited thereto.

Hereinafter, a detailed configuration of the turbo fan 200 will be described.

4 is a perspective view of a turbofan according to the present invention, FIG. 5 is a plan view of the turbofan according to the present invention, and FIG. 6 is a front view of the turbofan according to the present invention.

4 to 6, the turbo fan 200 according to the present invention, the main plate 115 to perform a rotational movement by the power provided by the fan motor, the hub 112 is accommodated in the fan motor therein The shroud has one end connected to the main plate 115 and connecting the other end of each of the plurality of blades 400 and the plurality of blades 400 arranged radially to the main plate 115 and guiding a direction of movement of air. 300 may be included.

The hub 112 is installed on the boss portion 220 and the surface of the hub 112 provided to be axially coupled to the fan motor and the like disposed in the center of the hub 112, the air passage passage It may include a through-hole 210 to provide. The through hole 210 may cool the heat of the fan motor by allowing cool air to flow into the fan motor.

The blade 400 is a blade front end 420 disposed adjacent to the hub 112 and the air disposed to be spaced apart from the hub 112 and moved along the blade 400 heat exchanger (see FIG. 3). 130 may include a blade rear end 410 for guiding the blade.

In the center of the shroud 300, a hollow may be formed to provide a movement passage of air. That is, the intake unit 360 may be formed in the hollow to allow the indoor air to be sucked into the turbo fan 200. The air sucked through the intake unit 360 may be discharged to the outside through the exhaust unit 450 formed in the space between the plurality of blades 400.

The shroud 300 forms an inner circumferential surface of the shroud 300 and forms an inner circumferential portion 370 disposed adjacent to the intake unit 360 and an outer circumferential surface of the shroud 300 and the exhaust portion. It may include an outer peripheral portion 380 disposed adjacent to 450.

In addition, the shroud 300 is disposed adjacent to the inner circumferential portion 370 and connected to the guide portion 310 and the guide portion 310 to guide the movement direction of air, and the curved portion 320 having a predetermined curvature. ) May be included. In detail, the guide part 310 may guide a movement direction of air introduced into the turbo fan 200 through the intake part 360. In addition, the curved part 320 may guide the movement of air so that the air guided into the turbo fan 200 through the guide part 310 may be discharged to the outside through the exhaust part 450. have.

The curved portion 320 may be composed of a plurality. The plurality of curved portions 320 may include a peak portion 330 disposed to be spaced apart from the main plate 115, and a curved portion 340 disposed adjacent to the main plate 115. Specifically, the curved portion 320 includes a first curved portion 321 and a second curved portion 322 disposed adjacent to the first curved portion 321, and the first curved portion 321 and the second curved portion 321 are disposed. The curved portion 340 may be disposed at an interface of the curved portion 322.

The curved portion 320 may further include an inclined portion 350 that connects the peak portion 330 and the curved portion 340. The inclined portion 350 may include a surface connecting the curved portion 340 at the peak portion 330, a surface connecting the outer circumference portion 380 at the peak portion 330, and a guide portion at the peak portion 330. 310 may be defined as the side connecting the.

In addition, the radius of curvature of the surface where the blade 400 and the shroud 300 meet, may be equal to or less than the radius of curvature of the curved portion 340. That is, the length of the curved portion 340 may be longer than the length of the surface where the blade 400 and the shroud 300 meet. This is to more smoothly guide the movement of air to the exhaust unit 450.

The point where the outer peripheral portion 380 of the shroud 300 and the blade 400 meet is called a first contact point 430, and is disposed adjacent to the first contact point 430, and an outer peripheral part of the shroud 300. When the point where the 380 meets the blade 400 is referred to as the second contact point 440, the exhaust part 450 is an extension part connecting the first contact point 430 and the second contact point 440. The space may be partitioned based on 460.

In detail, the extension part 460 may be defined as a virtual line connecting the first contact point 430 and the second contact point 440. In addition, the exhaust part 450 may include a first exhaust part 451 provided on an upper side of the extension part 460 and a second exhaust part 452 provided on a lower side of the extension part 460. ) May be included.

According to the prior art, the turbofan may have one exhaust portion. However, the turbo fan 200 according to the present invention may further include the first exhaust part 451 because the outer peripheral part 380 of the shroud 300 has a predetermined curvature. Therefore, since the air introduced into the turbofan 200 may be discharged to the outside not only through the second exhaust unit 452 but also through the first exhaust unit 451, the flow space of the air is increased to provide the air. Flow noise can be reduced.

In addition, the turbo fan 200 according to the present invention is a rotation axis (not shown) that provides a rotation center of the main plate 115 and a virtual line formed when extending the rotation axis (not shown) and the mountain portion 330 in a straight line It may further include a center line (not shown). Based on the center line (not shown), the distance between the peak portion 330 and the inner circumference portion 370 may be greater than the distance between the peak portion 330 and the outer edge portion 370. That is, when the air flows through the shroud 300, the moving space of the air discharged from the shroud 300 is larger than the moving space of the air flowing into the shroud 300. Can be large.

Therefore, the movement of the air passing through the shroud 300 is more smooth, and the pressure loss of the air passing through the shroud 300 is reduced.

Based on the outer circumferential portion 380, a point that is spaced apart from the main plate 115 may be defined as the protrusion 381. If the distance from the protrusion 381 to the extension part 460 is a, and the distance from the extension part 460 to the main plate 115 is b, the value of a / b is greater than 0.05 and It may be less than 0.15. That is, the distance between the first exhaust part 451 and the extension part 460 and the distance between the second exhaust part 452 and the extension part 460 may be determined according to a predetermined ratio.

When the length of the extension part 460 is c, the value of a / c may be greater than 0.02 and less than 0.06. That is, the distance between the first exhaust part 451 and the extension part 460 and the length of the extension part 460 may be determined according to a predetermined ratio.

However, the value of a, b, c and the ratio between a, b, and c are not limited thereto, and it is understood that various embodiments are possible.

Hereinafter, an operation process of the ceiling type air conditioner according to the present invention will be described.

7 is a view schematically showing the flow of air through the ceiling air conditioner according to the present invention.

7 is a view showing the flow of air based on the configuration of FIG. 3, the configuration as shown in FIG. 3 will use the reference numerals described in FIG.

Referring to FIG. 7, when the ceiling type air conditioner according to the present invention is operated, an indoor unit 100 connected to an outdoor unit (not shown) may be operated. When the indoor unit 100 is operated, the main plate 115 may be rotated by driving the fan motor 120. As the main plate 115 rotates, the plurality of blades 400 connected to the main plate 115 may also perform a rotational motion. When the plurality of blades 400 are rotated, indoor air may be sucked through the inlet 150 installed at the center of the front panel 102 of the indoor unit 100. The sucked air may pass through the filter 190 to filter foreign matters, and the movement of air to the turbofan 200 may be guided by the shroud 300. In detail, the air may be sucked into the turbo fan 200 through the intake part 360, which is a space formed by the inner circumference 370 of the shroud 300.

The air introduced into the turbofan 200 may be discharged in a radial direction according to the rotation of the plurality of blades 400. That is, air introduced from below may be discharged laterally by the operation of the turbo fan 200.

The shroud 300 includes a plurality of curved portions 320, and the plurality of curved portions 320 may include a plurality of peaks 330, a plurality of curved portions 340, and the peaks 330 and the curved portions 340. ) May include an inclined portion 350. The inclined portion 350 may include a protrusion 381 protruding in one direction from the extension portion 460. Accordingly, the air sucked into the turbo fan 200 may include a first exhaust part 451 formed by the protrusion 381 and a second exhaust part disposed in communication with the first exhaust part 451. 452 may be discharged to the outside.

A portion of the air discharged from the blade 400 may be exchanged with the refrigerant passing through the heat exchanger 130 and moving inside the heat exchanger 130. The heat exchanged coolant may be discharged to the indoor space through the discharge port 140. In addition, a plurality of vanes 141 may be installed at the discharge port 140 to suit the interior space.

8 is a graph showing a correlation between the air volume and the noise when the turbofan according to the present invention is applied to a ceiling type air conditioner.

Referring to FIG. 8, when the ceiling air conditioner to which the shroud is applied according to the related art is operated, an increase in noise may increase as the air volume increases (M). On the contrary, when the ceiling air conditioner to which the shroud is applied according to the present invention is operated, an increase in noise may be relatively smaller as the air volume increases (N).

The shroud 300 according to the present invention may include a plurality of peaks 330, curved portions 340, and inclined portions 350 connecting the peaks 330 and the curved portions 340. Therefore, in the turbofan 200 according to the present invention, a plurality of exhaust parts 450 may be formed by the plurality of mountain parts 330, the curved parts 340, and the inclined part 350. That is, in the turbofan 200 according to the present invention, since the area of the exhaust part 450 is relatively wider than in the related art, the flow space of air may increase. Therefore, the flow noise of the air passing through the exhaust part 450 may be reduced, and the internal pressure of the air formed in the exhaust part 450 may be prevented from escalating.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100: indoor unit 200: turbo fan
300: shroud 310: guide part
320: curved portion 330: ridge
340: curved portion 350: inclined portion
360: intake portion 370: inner peripheral portion
380: outer peripheral portion 400: blade
450: exhaust portion 460: extension portion

Claims (13)

Abacus rotated by the power provided by the fan motor;
A blade having one end connected to the main plate to perform a rotational movement; And
A shroud connecting the other end of the blade and having an inner circumference and an outer circumference;
The shroud,
A guide part installed at the inner circumference and guiding a moving direction of air; And
One side is connected to the guide portion and the other side is connected to the outer peripheral portion and includes a plurality of curved portions having a set curvature,
The curved portion,
A mountain part spaced apart from the main plate;
A curved portion disposed closer to the main plate than the peak portion; And
And an inclined portion connecting the peak portion and the curved portion, the peak portion and the outer peripheral portion, the peak portion and the guide portion, and having a set curvature.
And the peak portion is located farther from the main plate than the outer circumference portion. The method of claim 1,
The curved portion includes a first curved portion and a second curved portion disposed adjacent to the first curved portion,
The curved portion is a turbo fan is disposed on the interface between the first curved portion and the second curved portion. The method of claim 1,
The mountain portion and the curved portion,
Turbo fan arranged alternately with respect to the circumferential direction of the shroud. The method of claim 1,
A rotating shaft providing a center of rotation of the main plate; And
Further comprising a center line which is an imaginary line formed when the rotation axis and the mountain portion extends linearly,
Based on the centerline,
The distance between the mountain portion and the inner peripheral portion,
Turbo fan, characterized in that greater than the distance between the peak portion and the outer peripheral portion. The method of claim 1,
In the outer peripheral part,
A first contact point which is one of a plurality of points where the outer circumference portion and the blade meet; And
And a second contact point which is a point disposed adjacent to the first contact point among a plurality of points where the outer circumferential portion and the blade meet each other.
The shroud,
And a protrusion defined as one point of the outer circumferential portion and protruding in a direction away from the main plate, based on an extension that is a virtual line connecting the first contact point and the second contact point. The method of claim 5,
The distance between the protrusion and the extension portion, and the distance from the extension portion to the main plate is formed at a set ratio. The method of claim 5,
It is formed between the plurality of blades, and further comprises an exhaust for providing a passage for the movement of air,
The exhaust unit,
A first exhaust part disposed in one direction based on the extension part; And
And a second exhaust portion communicating with the first exhaust portion and disposed in another direction with respect to the extension portion. The method of claim 7, wherein
At least one of the first exhaust unit and the second exhaust unit,
The turbo fan defined by the space formed by the outer peripheral portion and the extension portion. The method of claim 2,
The length of the curved portion,
Turbo fan characterized in that it is formed longer than the length of the portion where the shroud and the blade meet. The method of claim 2,
The radius of curvature of the curved portion,
Turbo fan, characterized in that the longer than the radius of curvature of the portion where the shroud and the blade meet. A case defining an appearance and having a suction port for sucking indoor air;
A turbo fan positioned inside the case and changing a moving direction of air passing through the inlet; And
A heat exchanger disposed outside the turbofan,
The turbo fan,
Abacus rotated by the power provided by the fan motor;
A blade having one end connected to the main plate to perform a rotational movement;
A shroud connecting the other end of the blade and having an inner circumference and an outer circumference;
The shroud,
A guide part installed at the inner circumference and guiding movement of air into the turbo fan; And
One side is connected to the guide portion and the other side is connected to the outer peripheral portion and includes a plurality of curved portions having a set curvature,
The curved portion,
A mountain part spaced apart from the main plate;
A curved portion disposed closer to the main plate than the peak portion; And
And an inclined portion connecting the peak portion and the curved portion, the peak portion and the outer peripheral portion, the peak portion and the guide portion, and having a set curvature.
And the peak portion is located farther from the main plate than the outer circumference portion. The method of claim 11,
The curved portion includes a first curved portion and a second curved portion disposed adjacent to the first curved portion,
The curved portion is a ceiling air conditioner, characterized in that disposed on the interface between the first curved portion and the second curved portion. The method of claim 11,
The turbofan further includes an exhaust portion formed between the plurality of blades and providing a movement passage of the air to move the air to the heat exchanger,
The exhaust unit,
An extension part which is an imaginary line connecting two points disposed adjacent to each other among a plurality of points where the shroud and the blade meet;
A first exhaust part disposed in one direction based on the extension part; And
And a second exhaust portion communicating with the first exhaust portion and disposed in another direction with respect to the extension portion.

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