KR20180130336A - turbo fan for ceiling type air conditioner and ceiling type air conditioner having the same - Google Patents

Abstract

According to the present invention, a centrifugal fan for a ceiling type air conditioner comprises: a rotating plate having a hub coupled to a motor; a plurality of blades radially coupled to the rotating plate; and a shroud coupled to the blades, and having a suction unit to suck air toward the blades. Moreover, the rotating plate, the blades, and the shroud are integrally formed.

Description

Technical Field [0001] The present invention relates to a centrifugal fan for an air conditioner and a ceiling type air conditioner having the same and a ceiling type air conditioner having the same.

The present invention relates to a centrifugal fan for an air conditioner and a ceiling type air conditioner having the centrifugal fan.

Background Art [0002] Generally, a ceiling-type air conditioner is a device that is embedded in an indoor ceiling to introduce indoor air and then heat-exchanged air is discharged from the ceiling to the room. In the ceiling-type air conditioner, air is sucked through a suction port disposed at the center, and the sucked air can be air-conditioned by a heat exchanger disposed inside the ceiling-type air conditioner. The air-conditioned air can be discharged to the room through the discharge part disposed at the rim of the ceiling-type air conditioner to adjust the temperature and humidity of the indoor space.

As disclosed in the publication No. 10-2008-0054153 (entitled " turbo fan and air conditioner equipped therewith "), the air sucked through the suction port is sucked by a turbo fan disposed inside the ceiling type air conditioner Its movement can be guided. That is, the turbo fan can discharge air in the radial direction of the turbo fan by introducing air from the axial direction with reference to the turbo fan.

Open No. 10-2012-0023320 (entitled " Turbo fan for an air conditioner ") discloses a moving flow of air introduced through the turbo fan.

Specifically, the turbo fan may include a plurality of blades spaced apart from each other by a predetermined distance to move radially the air introduced through the inlet. The blade may include a static pressure surface defined by a surface facing the rotating direction of the turbo fan and a negative pressure surface opposite to the static pressure surface.

However, as the turbo fan rotates, a pressure difference may be generated between the static pressure surface and the negative pressure surface due to the pressure applied from the static pressure surface of the blade, through the suction port. Some of the air discharged in the radial direction by the pressure difference passes from the static pressure surface of the blade to the negative pressure surface.

Generally, the edge formed between the static pressure surface and the negative pressure surface is formed as a flat surface. Therefore, a vortex may be generated in the air passing from the static pressure surface to the negative pressure surface. The vortex refers to a phenomenon in which air or matter performs rotational motion with respect to a fixed center of rotation. When the vortex is generated, there is a problem that noise is generated due to the frictional force of the air.

1. KR 10-2008-0045568 A

SUMMARY OF THE INVENTION [0006] In order to solve the above-described problems, an object of the present invention is to provide a centrifugal fan and an air conditioner having the centrifugal fan that can improve productivity and assemblability by integrally injection molding a rotary plate, a blade, and a shroud.

Another object of the present invention is to provide a centrifugal fan and an air conditioner having the centrifugal fan capable of reducing a vortex phenomenon of air generated at an upper end of a blade when air is discharged through the blades.

The present invention also provides a centrifugal fan and an air conditioner having the centrifugal fan, which can prevent a vortex phenomenon of air leaking from the blade and reduce air flow noise.

According to an aspect of the present invention, there is provided a centrifugal fan including a rotating plate having a hub coupled to a motor, a plurality of blades radially coupled to the rotating plate, and a plurality of blades coupled to the plurality of blades, And a shroud having a suction portion for sucking air toward the blade, wherein the rotating plate, the blade and the shroud are integrally formed.

Further, the rotary plate, the blade and the shroud are integrally injection-molded.

The outer diameter of the rotary plate is smaller than the outer diameter of the shroud.

In addition, a discharge port is formed in the rotary plate at a position adjacent to the rim, in parallel with the circumferential direction.

The discharge port is formed in an arc shape.

In addition, the discharge ports are spaced apart from each other along the circumferential direction.

In addition, at least one corner of both sides of the rotating plate forming the discharge port is formed as a curved surface or an inclined surface.

Further, the rotary plate is formed as a curved surface or an inclined surface for guiding the discharge of air to the inner edge of the first side adjacent to the center portion and the outer edge of the second side adjacent to the rim.

Further, the discharge port is formed between the blades.

In addition, both side ends of the discharge port are formed to be spaced apart from the connection portion between the blade and the rotary plate.

An air conditioner according to an embodiment of the present invention includes a case having a suction port for sucking room air and forming an outer appearance, a centrifugal fan provided inside the case for discharging the air passing through the suction port in a radial direction, And a heat exchanger disposed in an outer chamber of the centrifugal fan, wherein the centrifugal fan has the above-described configuration.

According to the present invention, the rotary plate, the blade, and the shroud are integrally injection molded to improve productivity and assemblability.

Further, when the air is discharged through the blades, the vortex phenomenon of the air generated at the upper end of the blades can be reduced.

In addition, it is possible to prevent vortexing of air leaking from the blade, thereby reducing air flow noise.

Further, noise and vortex are improved, and blowing performance and heat efficiency can be improved.

In addition, the manufacturing cost can be lowered.

1 is a bottom perspective view of a centrifugal fan for a ceiling type air conditioner according to the present invention.
2 to 3 are perspective views showing a ceiling type air conditioner according to the present invention.
4 is a longitudinal sectional view of a mounted ceiling type air conditioner according to the present invention.
5 is a bottom view of an indoor unit which is a part of the present invention.
6 is an exploded perspective view of a discharge panel and a suction panel, which are components of the present invention.
7 is a perspective view showing the concept of a discharge passage provided in a discharge panel which is a component of the present invention.
8 is a perspective view of an inner flow body and a barrier, which are components of the present invention.
9 is a bottom view of a centrifugal fan for a ceiling type air conditioner according to the present invention.
10 is a longitudinal sectional view of a centrifugal fan for a ceiling type air conditioner according to the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims, It will be easily understood that the present invention is not limited thereto.

The drawings attached to the following embodiments are embodiments of the same invention. However, in order to facilitate understanding of the invention within the scope of the invention, And a specific portion may not be displayed in accordance with the drawings, or may be exaggerated in accordance with the drawings.

FIG. 1 is a perspective view of a centrifugal fan for a ceiling-type air conditioner according to an embodiment of the present invention, FIGS. 2 to 3 are perspective views showing a ceiling-type air conditioner equipped with a centrifugal fan, 1 is a longitudinal sectional view of a ceiling type air conditioner.

1 to 4, a ceiling-mounted air conditioner according to the present invention includes a case 1, 2, 3 formed with an inlet 31 for sucking room air, A centrifugal fan 120 provided inside the centrifugal fan 120 for discharging the air having passed through the suction port 31 in the radial direction and a heat exchanger 5 disposed in the outer chamber of the centrifugal fan 120 have.

The centrifugal fan 120 includes a rotating plate 121 having a hub 121a coupled to the motor 110, a plurality of blades 122 radially coupled to the rotating plate 121, And a shroud 123 coupled to the plurality of blades 122 and having a suction portion 123a for sucking air toward the plurality of blades 122. The blades 122, 123 may be integrally formed.

For example, the rotary plate 121, the blade 122, and the shroud 123 may be integrally formed by injection molding (one-shot injection molding).

When the rotary plate 121, the blade 122, and the shroud 123 are integrally injection-molded as described above, productivity and assemblability can be improved. In addition, the production cost can be reduced.

When the rotary plate 121, the blades 122 and the shroud 123 are integrally injection-molded, the outer diameter of the rotary plate 121 may be smaller than the outer diameter of the shroud 123.

In detail, the outer diameter of the rotary plate 121 may be smaller than the diameter of the suction portion 123a of the shroud 123.

The reason for this is to prevent the undercut from occurring in the mold during injection molding. That is, after the injection molding, the outer diameter of the rotary plate 121 is formed to be smaller than the inner diameter of the shroud 123 in order to prevent the occurrence of an element that hinders the separation of the mold. Therefore, after the injection, the mold and the centrifugal fan 120 can be easily separated from each other.

Hereinafter, the ceiling type air conditioner according to the present invention will be described in more detail.

Referring again to Figs. 2 to 4, the case 1, 2, 3 includes an indoor unit 1, a discharge panel 2, and a suction panel 3.

In the following description, the case where the air conditioner is circular is described as an example, but the scope of the present invention is not limited thereto, and an air conditioner having various structures and shapes that can be mounted on a ceiling can be included in the present invention Clearly.

First, the indoor unit 1 may include a blower 100 and a heat exchanger 5.

Therefore, the indoor unit 1 can suck indoor air through the blower 100, heat-exchange the air with the heat exchanger 5, and then blow it to the discharge panel 2 to supply it to the room.

The indoor unit 1 includes a region 15 in which air is sucked into the indoor unit 1 and a region 7,8,9,10 in which the air in the indoor unit 1 is blown to the discharge panel 2, And an indoor unit body (13).

Further, the indoor unit 1 may further include a drain unit 14 disposed under the heat exchanger 5.

The indoor unit 1 may be provided with an inner suction hole 6 through which the air sucked through the circular suction panel 3 formed at the central portion of the discharge panel 2 is sucked into the indoor unit 1. The indoor unit 1 may be provided with a plurality of blowing passages 7, 8, 9, 10 for discharging and guiding the air that has passed through the heat exchanger 5.

The indoor unit (1) can discharge air in a downward direction through the plurality of air passages (7, 8, 9, 10). The indoor unit 1 can form a plurality of discharge air streams blown from the inside of the indoor unit 1 in the downward direction.

The outer circumference of the indoor unit 1 may have a polygonal shape. The plurality of ventilation passages (7, 8, 9, 10) may be formed to be opened in the vertical direction on the bottom surface of the indoor unit (1).

The indoor unit 1 can discharge a plurality of vertical air currents blown downward through the bottom surface thereof.

The indoor unit 1 can be installed on the ceiling. The indoor unit 1 can be supported by a fastening member such as an anchor bolt fixed to the ceiling. The indoor unit (1) may be provided with a fastening portion (12) for fastening the fastening member.

Further, the indoor unit 1 may include a chassis 11 forming an appearance. The chassis 11 may be an indoor unit body that forms the appearance of the indoor unit.

The chassis 11 can be mounted on the ceiling with fastening members such as anchor bolts.

The chassis 11 may be composed of a combination of a plurality of members. The chassis 11 may be formed in a polyhedral shape having a bottom open and a space therein.

The chassis 11 may have a space in which the blower 100 and the heat exchanger 5 are accommodated. The chassis 11 may have a shape in which the four side surfaces forming the front, rear, left, and right side surfaces and the top surface are clogged, and the bottom surface of the chassis 11 may be opened.

The blower 100 may be disposed inside the chassis 11. In detail, the blower 100 can be mounted on the top plate of the chassis 11. [

The blower 100 may be mounted to the chassis 11 such that at least a portion of the blower 100 is located inside the heat exchanger 5.

The blower 100 may be mounted above the discharge panel 2.

The blower 100 may be composed of a centrifugal blower that sucks the air on the lower side and blows the air in the centrifugal direction. The blower 100 may include a motor 110 and a centrifugal fan 120 connected to the motor 110. The blower 100 may include an orifice 140 that guides the flow of air drawn into the centrifugal fan 120.

The rotation shaft connected to the centrifugal fan 120 may be mounted on the motor 110 so as to protrude downward.

As described above, the centrifugal fan 120 includes a rotating plate 121 having a hub 121a coupled to the motor 110, a plurality of blades 122 radially coupled to the rotating plate 121, And a shroud 123 coupled to the blades 122 of the blades 122 and having a suction portion 123a for sucking air toward the plurality of blades 122. The blades 122, A wood 123 can be integrally formed.

The rotary plate 121, the blade 122, and the shroud 123 may be integrally injection-molded.

When the rotary plate 121, the blades 122 and the shroud 123 are integrally injection-molded as described above, the outer diameter of the rotary plate 121 may be smaller than the outer diameter of the shroud 123 .

In detail, the outer diameter of the rotary plate 121 may be smaller than the diameter of the suction portion 123a of the shroud 123.

The orifice 140 may be installed in the interior of the chassis 11. The orifice 140 may be installed in the indoor unit flow body 13. Further, the inner suction hole 6 may be formed in the orifice 140.

The air that has passed through the suction panel 3 can be sucked into the centrifugal fan 120 through the inner suction hole 6 of the orifice 140 and can be sucked by the centrifugal fan 120 in the centrifugal direction of the centrifugal fan 120 .

The air blown in the centrifugal fan 120 in the centrifugal direction can be flowed into the heat exchanger 5 arranged to surround the outer circumference of the centrifugal fan 120 and can be heat-exchanged with the heat exchanger 5.

The heat exchanger 5 may be at least once bent. The heat exchanger 5 may be formed to be smaller in size than the chassis 11 and disposed inside the chassis 11.

The heat exchanger (5) may be arranged in a rectangular or hollow cylindrical shape inside the chassis (11).

The heat exchanger (5) may be installed so as to be spaced apart from the inner surface of the chassis (11). Between the heat exchanger 5 and the inner surface of the chassis 11, a space communicating with air blowing passages 7, 8, 9, and 10 to be described later may be provided.

The heat exchanger 5 may be bent so that a space S1 in which the blower 100 is accommodated is formed therein. The heat exchanger (5) may include four heat exchangers facing different surfaces of the chassis (11). The heat exchanger 5 may be disposed outside the blower 100 so as to surround the outer peripheral surface of the blower 100. [

The drain unit 14 may be formed so that the upper surface thereof is opened, and a space in which the lower portion of the heat exchanger 5 is accommodated may be formed therein.

The indoor unit flow body 13 may be coupled to the drain unit 14. The indoor unit flow body 13 may have a hollow portion 15 through which air can pass in the vertical direction. The hollow portion 15 may be an indoor air intake port for sucking the air in the lower portion of the indoor unit 1 into the indoor unit 1. [

Further, the indoor unit flow body 13 may be disposed on the inner lower side of the chassis 11. The indoor unit flow body 13 can form an appearance of the bottom surface of the indoor unit 1.

5 is a bottom view of an indoor unit which is a part of the present invention.

5, each of the plurality of ventilation passages 7, 8, 9, and 10 formed in the indoor unit 1 may have a polygonal cross-sectional shape. Each of the plurality of blowing passages (7, 8, 9, 10) may have a rectangular cross-sectional shape.

The plurality of ventilation passages (7, 8, 9, 10) may be a region where the air inside the indoor unit (1) is blown to the discharge panel (2).

The plurality of ventilation passages (7, 8, 9, 10) may be spaced apart from the inner suction holes (6).

The plurality of ventilation passages 7, 8, 9 and 10 include the left ventilation passage 7, the right ventilation passage 8, the front ventilation passage 9 and the rear ventilation passage 10 .

For example, a plurality of blower passages 7, 8, 9, and 10 may be formed along a rectangular imaginary line 17A (see FIG. 5), and a plurality of blower passages 7, May be formed on each side of the imaginary line 17A.

The plurality of air flow passages 7, 8, 9, and 10 may be spaced apart from each other in the indoor unit flow path body 13.

The plurality of blowing passages 7, 8, 9, and 10 can be formed between the indoor unit flow path body 13 and the inner surface of the chassis 11, And may be spaced apart from each other between the body 13 and the inner surface of the chassis 11.

The plurality of ventilation passages 7, 8, 9, and 10 may be four opening areas in which the positions are different from each other and the opening directions are parallel to each other. Exchanged air in the heat exchanger (5) can be discharged to the discharge panel (2) side.

For example, the indoor unit 1 may be a 4-way discharge-type indoor unit that forms four vertical air flows whose discharge directions are parallel to each other.

2 to 4, the discharge panel 2 may have a circular outer circumference 2A. In the discharge panel 2, the bottom surface 2B may be flat.

The discharge panel 2 can be coupled to the indoor unit 1 and can guide the air that has passed through the plurality of air passages 7, 8, 9 and 10 to the outside. The discharge panel 2 may be disposed under the indoor unit 1 together with the suction panel 3. [

The discharge panel 2 can be coupled to the lower portion of the indoor unit 1 and can guide the discharge of the air blown downward through the plurality of blowing passages 7, 8, 9, 10 to the room.

The discharge panel 2 can receive the air blown in four directions parallel to each other in the indoor unit 1 and can guide the discharge to the lower periphery of the discharge panel 2. [

The discharge panel 2 switches the air flow of the air blown in the vertical direction, particularly the downward direction, in the indoor unit 1 to the horizontal direction H1 as shown in Fig. 4, It is possible to switch to the lower inclination direction H2 having the inclination angle &thetas;

6 is an exploded perspective view of a discharge panel and a suction panel, which are components of the present invention.

Referring to FIG. 6, the discharge panel 2 may be formed of a combination of a plurality of members 50, 60, 70, and 90.

The discharge panel 2 may be provided with at least one inlet 21, 22, 23, 24 which communicates with the plurality of air passages 7, 8, 9, 10 of the indoor unit 1. In addition, the discharge panel 2 may be provided with a circular or arc-shaped opening 25.

The discharge panel 2 can be provided with an inner space 26 and the inner space 26 can communicate with the openings 21, 22, 23 and 24 and the openings 25. This will be described in detail later.

7 is a perspective view showing the concept of a discharge passage provided in a discharge panel which is a component of the present invention.

6 to 7, the discharge panel 2 may be provided with a suction passage 16 for sucking and guiding the air having passed through the suction panel 3 to the inside of the indoor unit 1. The discharge panel 2 may be provided with a discharge passage 18 for discharging and guiding the air discharged from the plurality of air blowing passages 7, 8, 9, 10 to the room.

The discharge panel 2 may be provided with a suction passage 16 for guiding the air having passed through the suction panel 3 to the hollow portion 15 (see FIG. 5) of the indoor unit 1.

The discharge panel 2 may be provided with a hollow portion through which the air having passed through the suction panel 3 passes to be sucked into the indoor unit 1. The hollow portion of the discharge panel 2 may be formed to pass through the discharge panel 2 in the vertical direction. The hollow portion may be the suction passage (16) of the discharge panel (2). Hereinafter, the suction flow path of the discharge panel 2 and the hollow portion of the discharge panel 2 will be described using the same reference numeral "16".

The suction flow path 16 may be positioned inside the discharge flow path 18 and may be formed separately from the discharge flow path 18.

The suction flow path 16 may be formed in the main flow path body 50 and the inner flow path body 60, respectively. The upper hollow portion 20 formed in the main flow path body 50 and the lower hollow portion 68 formed in the inner flow path body 60 communicate with each other in the vertical direction to form the suction flow path 16.

The ceiling-mounted air conditioner is capable of accommodating an electric component 17 such as a sensor, a motor, or a user's body in the suction flow path 16. In this case, the electric component 17 may have a rectangular cross-sectional shape and may be arranged so as not to disturb the flow of air to the suction flow path 16, which is a shape close to a quadrangle.

Referring again to Figs. 5 to 7, at least one inlet may be formed in the discharge panel 2. The discharge panel 2 may be provided with a plurality of inlets 21, 22, 23, 24 corresponding to a plurality of blowing passages 7, 8, 9, 10. In addition, the discharge panel 2 may be provided with an arc-shaped or circular opening 25. The discharge panel 2 may be formed with an internal space 26 connecting the plurality of inlets 21, 22, 23, 24 and the openings 25.

The discharge passage 18 of the discharge panel 2 has a plurality of inlets 21,22,23 and 24 and a flow area 26A of the inner space 26 and a first opening area 25A ).

The air discharged from the air blowing passages 7, 8, 9 and 10 of the indoor unit 1 can be introduced into the flow region 26A through the plurality of inlets 21, 22, 23 and 24, Can be discharged to the outside of the discharge panel 2 through the first opening area 25A.

The inlets 21, 22, 23 and 24 formed in the discharge panel 2 can be formed at positions corresponding to the ventilation passages 7, 8, 9 and 10 formed in the indoor unit 1.

The inlets 21, 22, 23, and 24 formed in the discharge panel 2 include a left inlet 21 communicating with the left ventilation passage 7 in the vertical direction and a right inlet 21 communicating with the right ventilation passage 8 in the vertical direction, A front side inlet 23 communicating with the front side airflow passage 9 in the vertical direction and a rear side inlet 24 communicating with the rear side airflow passage 10 in the vertical direction have.

The cross-sectional size of each of the plurality of inlets 21, 22, 23, and 24 may be the same as the cross-sectional size of each of the plurality of blowing passages 7, 8, 9,

The sectional shapes of the inlets 21, 22, 23 and 24 may be polygonal. Here, the polygonal shape of the inlets 21, 22, 23, and 24 may include a shape in which at least one vertex portion is rounded to have a predetermined curvature.

The sectional shapes of the inlets 21, 22, 23 and 24 may be rectangular, in particular rectangular, like the cross-sectional shape of the blowing passages 7, 8, 9 and 10.

The plurality of inlets 21, 22, 23 and 24 can be formed along the rectangular imaginary line 19 (see FIG. 7), such as the ventilation passages 7, 8, 9 and 10 of the indoor unit 1, A plurality of inlets 21, 22, 23, and 24 may be formed on each side of the rectangular virtual line 19.

The rectangular imaginary line 19 of the discharge panel 2 shown in Fig. 7 and the rectangular imaginary line 17A of the indoor unit 1 shown in Fig. 5 are equal in size and can be aligned in the vertical direction.

The opening 25 may be an air outlet through which the air passing through the heat exchanger 5 in the ceiling-type air conditioner is discharged to the outside of the ceiling-type air conditioner. In at least part of the opening 25, heat-exchanged air can be discharged from the heat exchanger 5 of the indoor unit 1. [

The number of openings 25 may be smaller than the number of openings 21, 22, 23, The opening 25 may be larger than each of the plurality of inlets 21, 22, 23, and 24.

The opening 25 may have an arc shape, and in this case, the discharge panel 2 may be provided with a plurality of openings. When the opening 25 is arc-shaped, the plurality of openings 25 may be spaced apart in the circumferential direction of the discharge panel 2, and may be formed along the circular imaginary line.

The opening 25 may have a circular ring shape. In this case, one opening 25 may be formed in the discharge panel 2. Here, when the opening 25 is circular, the circle may have a shape including an ellipse, and its cross-sectional shape may be formed in a closed loop shape.

The opening 25 may be an outlet through which the air having passed through the internal space 26 is discharged to the outside of the discharge panel 2. [

The discharge panel 2 can be exposed to the room while being coupled to the lower portion of the indoor unit 1 and the opening 25 can be exposed to the room together with the bottom surface of the discharge panel 2. [

Referring to FIG. 7, the opening 25 may include a first opening region 25A and a second opening region 25B.

The first opening region 25A may be a region corresponding to the openings 21, 22, 23, and 24 of the opening portion 25. More specifically, the first opening area 25A may refer to an area of the opening 25 located below the inlets 21, 22, 23, and 24.

The second opening region 25B may be a region corresponding to a space between a pair of adjacent openings among the openings 25. More specifically, the second opening region 25B may mean an area located between the pair of openings 25 adjacent to each other.

That is, the first opening region 25A may correspond to the inlet 21, 22, 23, 24 along the direction of the inner space 26, and the second opening region 25B may correspond to the direction of the inner space 26 22, 23, 24 along the length of the inlet 21, 22, 23, 24.

The first opening region 25A and the second opening region 25B may be alternately disposed along the circumferential direction of the discharge panel 2. [ The first opening region 25A and the second opening region 25B may be alternately disposed along the circumferential direction of the opening portion 25 when the opening portion 25 is circular.

The second opening region 25B may be located between a pair of first opening regions 25A adjacent to each other and the first opening region 25A may be located between a pair of adjacent second opening regions 25B can do.

In the first opening area 25A, the air introduced from the corresponding inlet 21, 22, 23, 24 can be discharged. On the other hand, air may not be discharged in the second opening region 25B.

As another example, a part of the air discharged into the first opening region 25A may be discharged to the second opening region 25B.

The number of each of the first opening region 25A and the second opening region 25B may be the same as the number of the inlets 21, 22, 23,

Each of the first opening region 25A and the second opening region 25B may have an arc shape. When the opening 25 is a circular shape, each of the first opening region 25A and the second opening region 25B may be an arc shape constituting a part of a circular shape.

The circumferential length of the first opening region 25A may be longer than the circumferential length of the second opening region 25B. That is, the area of the first opening region 25A may be wider than the area of the second opening region 25B.

Referring back to Fig. 7, the inner space 26 of the discharge panel 2 can communicate with the openings 21, 22, 23, and 24 and the openings 25. The inner space 26 may be located between the openings 21, 22, 23, 24 and the openings 25.

The flow area 26A of the inner space 26 can guide the air introduced into the openings 21, 22, 23, 24 to the openings 25.

The flow area 26A in the internal space 26 may be an air flow switching discharge passage for switching the flow of the air sucked into the plurality of inlets 21, 22, 23, 24 and guiding the air flow to the opening 25.

The inner space 26 may be formed in a closed loop shape in the horizontal direction.

The inner space 26 may be formed in such a shape that the cross-sectional area gradually increases toward the lower side.

The internal space 26 may be formed to convert the vertical airflow into the horizontal airflow, and the vertical space may have a curved shape in the vertical direction. The inner space 26 may have a shape in which the cross section in the vertical direction extends in the outward direction toward the lower side.

The rectangular imaginary line 19 in which the plurality of inlets 21, 22, 23 and 24 are located is not only higher in position than the opening 25 but also smaller than the opening 25. In this case, the first distance D1 between the sides of the quadrilateral imaginary line 19 and the opening 25 can be different from the second distance D2 between the vertex of the quadrilateral imaginary line 19 and the opening 25 have.

Specifically, the first distance D1 may be longer than the second distance D2, and the distance between the rectangular virtual line 19 and the circular opening 25 may be repeatedly increased and decreased along the circumferential direction . The first distance D1 may be gradually reduced as it approaches the vertex of the rectangular virtual line 19. [

The inner space 26 may be formed such that the horizontal widths D3 and D4 thereof in the circumferential direction are not equal in consideration of the distance difference D1 to D2.

The horizontal width D3 (D4) of the inner space 26 can be alternately increased and decreased along the opening 25, and the increase and decrease can be repeated.

In addition, the inner space 26 may include a flow region 26A and a blocking region 26B.

In detail, depending on the positional relationship with the inlets 21, 22, 23 and 24, a flow region 26A can be formed below the inlets 21, 22, 23 and 24, 21, 22, 23, 24).

The blocking region 26B may be located between a pair of adjacent inlets.

The flow region 26A and the blocking region 26B may be partitioned by a barrier 130, which will be described later. The barrier 130 may be disposed between the flow region 26A and the blocking region 26B.

The flow region 26A may be located between a pair of opposing barriers 130.

The blocking region 26B may be located on both sides of the flow region 26A in the circumferential direction and may be formed at a corner portion between the flow regions 26A.

The flow area 26A and the blocking area 26B can be alternately disposed along the circumferential direction of the discharge panel 2. [

Referring again to FIG. 7, the first opening region 25A may be located below the flow region 26A. The second opening region 25B may be located under the blocking region 26B.

The flow region 26A may be located between the inlet 21, 22, 23, 24 and the first opening region 25A. Further, the blocking region 26B may be located between the pair of adjacent inlet portions and the second opening region 25B.

The horizontal width D3 of the flow region 26A may be larger than the horizontal width D4 of the blocking region 26B. Here, the horizontal widths D3 and D4 are compared at the same height.

The upper end of the inner space 26 may be a region closer to the plurality of inlets 21, 22, 23 and 24 and the plurality of inlets 21, 22, 23 and 24 of the openings 25.

The lower end of the inner space 26 may be an opening 25, and its cross-sectional shape may be a circular shape. More specifically, the lower end of the flow region 26A may be the first opening region 25A, and the cross-sectional shape thereof may be arc-shaped. In addition, the lower end of the blocking region 26B may be the second opening region 25B, and the cross section may be arc-shaped.

The inner space 26 may be formed in a shape whose cross-sectional shape gradually becomes closer to the circular shape toward the lower side.

In operation of the ceiling type air conditioner, the air passing through the plurality of inlets 21, 22, 23, 24 can be dropped into the flow region 26A and then discharged through the first opening region 25A .

At this time, the air that has fallen into the flow region 26A may be blocked by the barrier described later and not flow into the blocking region 26B, thereby preventing air from being discharged into the second opening region 25B .

That is, in the present embodiment, the air introduced into the plurality of inlets 21, 22, 23, 24 is discharged to the first opening area 25A of the opening 25 without spreading horizontally in the inner space 26 .

8 is a perspective view of an inner flow body and a barrier, which are components of the present invention.

7 to 8, the ceiling-type air conditioner according to an embodiment of the present invention may include a barrier 130. The barrier 130 may be disposed in the inner space 26A of the discharge panel 2. [

The upper end 131 of the barrier 130 may be located below the openings 21,22,23 and 24 and the lower end 132 may be located above the opening 25. [ The upper end of the barrier 130 may be located at the entrance 21, 22, 23, 24, and the lower end 131 may be located at the opening 25.

The upper end 131 of the barrier 130 may be formed at the same height as the upper end 26C of the inner space 26. [ The lower end 132 of the barrier may be located before the end of the opening 25 along the air flow direction.

The barrier 130 can partition the inner space 26 into a flow region 26A and a blocking region 26B. The barrier 130 may be disposed between the flow region 26A and the blocking region 26B.

At least one barrier 130 may be provided. Preferably, the number of the barriers 130 may be twice the number of the inlets 21, 22, 23, 24. That is, one pair of barriers 130 may correspond to one entrance. For example, the discharge panel 2 may be provided with four inlets 21, 22, 23, and 24, and may include eight barriers 130.

The barrier 130 may be disposed perpendicular to the inner space 26.

The lower end 132 of the barrier 130 may be concave. In more detail, the lower end 132 of the barrier 130 may be concave toward the upper side. Thereby, the lower end 132 of the barrier 130 can be prevented from being exposed to the outside of the discharge panel 2, and the ceiling type air conditioner can be improved in design.

At least a part of the barrier 130 may be positioned between the inner passage body 60 and the outer body portion 52. The barrier 130 can be in contact with the inner curved surface 65, which is the outer peripheral surface of the inner flow body 60.

The barrier 130 may be disposed between the inlet facing surface 65A and the connecting portion facing surface 65B of the outer circumferential surface of the inner flow body 60. [ The barrier 130 may be disposed at the boundary between the inlet facing surface 65A and the connecting portion facing surface 65B.

The inner end of the barrier 130 may have a shape bent outward along the outer circumferential surface of the inner passage body 60.

The lower end 132 of the barrier 130 may be located above the lower end 67 of the inner flow body 60.

The upper end 131 of the barrier 130 may be positioned above the upper surface 69 of the inner passage body 60. [

The plurality of barrier 130 may be provided, and the barrier may be spaced apart from each other. The barrier 130 may be disposed along the outer circumferential surface of the inner passage body 60.

4 to 8, the discharge panel 2 may include a main flow body 50 and an inner flow body 60 coupled to the main flow body 50.

The discharge panel 2 may further include an outer cover 70 for guiding the air that has passed through the air blowing passages 7, 8, 9, 10 to the flow area 26A of the inner space 26. [ The discharge panel 2 may further include a decor cover 90 coupled to the main flow body 50.

The main flow body 50 may include an upper body portion 51, an outer body portion 52, and a connecting portion 53.

The upper body part 51 may be formed so that the upper hollow part 20 passes through in the vertical direction at the center. The upper body part 51 may be connected to the outer body part 52, which is larger than the upper body part 52, by a connection part 53.

The outer body portion 52 may be formed larger than the upper body portion 51. The height of the outer body portion 52 may be lower than the height of the upper body portion 51.

The connecting portion 53 can connect the upper body portion 51 and the outer body portion 52, which are different in height and size.

The suction panel 3 may be disposed below the inner channel body 60. The suction panel 3 may be provided with a plurality of suction ports 31 through which air is sucked into the lower hollow portion 68. All or part of the plurality of suction openings 31 may be located under the lower hollow portion 68.

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

First, when an operation command is input from the user, the blower 100 and the outdoor unit are driven. When the blower 100 is driven, air in the room passes through the suction grille 3, (20) and is sucked into the indoor unit (1).

The air sucked into the indoor unit 1 can be flowed to the heat exchanger 5 outside the blower 100 by the blower 100 and can be supplied to the heat exchanger 5 while passing through the heat exchanger 5. [ Lt; / RTI > While being exchanged with the heat exchanger (5), the cooled or heated air can pass through the plurality of air passages (7, 8, 9, 10) and exit the indoor unit (1). At this time, a plurality of discharge air flows can be blown downward through the air blowing passages (7, 8, 9, 10).

As described above, the air that has passed through the plurality of air passages 7, 8, 9, and 10 passes through the inlets 21, 22, and 23 of the discharge panel 2 communicating with the air passages 7, And 24 to be introduced into the inner space 26 of the discharge panel 2 and supplied to the outside of the discharge panel 2 through the opening 25. [

In the above process, vortex is generated outside the blower 100 by the air that is sucked by the blower 100 and then flows to the heat exchanger 5 outside the blower 100, and noise is generated by the vortex.

Particularly, as in the present invention, when the rotary plate 121 is formed to be smaller than the suction diameter of the shroud 123 for injection molding, the blade 122 is exposed to the outside of the rotary plate 121, And the noise is increased.

In detail, when the blowing fan 100 operates, the air that has flowed along the blades 122 flows into the inside of the rotating plate 121 (the upper space of the rotating plate) at a low pressure at the end of the rotating plate 121, Vortex and noise are generated.

Particularly, in the case of the ceiling type air conditioner, since the space in which the blowing fan 100 is mounted is narrow, the noise caused by the vortex is inevitably increased.

In the present invention, the shape of the centrifugal fan 120 is simply changed to prevent vortexes generated outside the rotating plate 121 as described above, thereby improving noise.

Hereinafter, the centrifugal fan 120 according to the present invention will be described in more detail.

FIG. 9 is a bottom view of a centrifugal fan for a ceiling-type air conditioner according to the present invention, and FIG. 10 is a longitudinal sectional view of a centrifugal fan for a ceiling-type air conditioner according to the present invention.

9 to 10, a discharge port 124 may be formed in the rotation plate 121 at a position adjacent to the outer edge 121b in parallel with the circumferential direction.

The discharge port 124 may be formed in a straight line or a curved line.

For example, the discharge port 124 may be formed in an arc shape.

When the discharge port 124 is formed as described above, vortices and noise can be reduced without changing the air flow rate. Still further, the centrifugal fan 120 may be integrally injection-molded.

Part of the air passing through the discharge port 124 through the blade 122 flows into the inside of the rotating plate 121 (the upper space of the rotating plate) Is increased. As a result, the air that has exited the blade 122 is no longer introduced into the rotating plate 121 having increased pressure, and the vortex and the vortex generated when the air exiting the blade 122 flows into the inside of the rotating plate 121 Noise can be improved.

Also, since the air sucked into the blower 100 can smoothly flow to the end of the blade 122, the discharge airflow may be improved.

In this embodiment, the discharge ports 124 formed in an arc shape as described above may be spaced apart from each other along the circumferential direction. Therefore, air discharge to the inside of the rotary plate 121 through the discharge port 124 can be uniformly performed in the entire area of the rotary plate 121. [

At least one corner of each of the side surfaces 121c and 121d forming the discharge port 124 may be formed as a curved surface 125 or an inclined surface.

The rotary plate 121 includes a curved surface 125 for guiding the discharge of air to the inner edge of the first side surface 121c adjacent to the center portion and the outer edge of the second side surface 121d adjacent to the edge 121b, Or an inclined plane can be formed.

The curved surface 125 or the inclined surface may be formed along the flow direction of the air passing through the discharge port 124.

Accordingly, the flow of air to the discharge port 124 along the curved surface 125 or the inclined surface can proceed more smoothly.

In addition, the discharge port 124 may be formed between the blades 122.

In more detail, both ends of the discharge port 124 may be spaced apart from the connecting portion 126 of the blade 122 and the rotating plate 121.

Interference does not occur between the discharge port 124 and the blades 122 disposed on both sides of the discharge port 124 and the blade 122 can rotate without being affected by the discharge port 124. [

Further, a connection portion 126 is secured between the blade 122 and the rotary plate 121, so that the coupling force and the durability can be enhanced.

According to the present invention, the rotary plate, the blade, and the shroud are integrally injection molded to improve productivity and assemblability. In addition, when the air is discharged through the blades, the swirling phenomenon of the air generated at the upper end of the blade can be reduced, and the swirling phenomenon of the air leaking from the blades can be prevented, have.

Claims (11)

A rotating plate having a hub coupled to the motor;
A plurality of blades radially coupled to the rotating plate; And
A shroud coupled to the plurality of blades and having a suction portion for sucking air toward the plurality of blades,
Wherein the rotary plate, the blade, and the shroud are integrally formed.
The method according to claim 1,
Wherein the rotary plate, the blade, and the shroud are integrally injection-molded.
The method according to claim 1,
And the outer diameter of the rotary plate is smaller than the outer diameter of the shroud.
The method according to claim 1,
Wherein the rotary plate is provided with a discharge port in a circumferential direction at a position adjacent to the rim.
5. The method of claim 4,
Wherein the discharge port is formed in an arc shape.
6. The method of claim 5,
And the discharge ports are spaced apart from each other along the circumferential direction.
The method of claim 4, wherein
The centrifugal fan for a ceiling type air conditioner according to claim 1, wherein at least one corner of both sides of the rotating plate forming the discharge port is curved or inclined.
8. The method of claim 7,
Wherein the rotary plate is formed of a curved surface or an inclined surface for guiding the discharge of air to the inner edge of the first side adjacent to the center portion and the outer edge of the second side adjacent to the rim of the centrifugal fan.
5. The method of claim 4,
And the discharge port is formed between the blades.
10. The method of claim 9,
Wherein both ends of the discharge port are spaced apart from a connection portion between the blade and the rotary plate.
A case having a suction port formed therein for sucking indoor air;
A centrifugal fan provided in the case and discharging the air passing through the suction port in a radial direction; And
And a heat exchanger disposed in an outer chamber of the centrifugal fan,
Wherein the centrifugal fan is any one of the centrifugal fans selected from claims 1 to 10.

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