JPH11182921A - Indoor machine for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indoor machine for air conditioner which can efficiently rectify the air blown from a turbofan and can reduce noise. SOLUTION: An indoor machine for air conditioner is provided with a turbofan 2 which is positioned in a casing 1 and blows out the car sucked from the front face side in the radial direction against its axis. Air flow control members 11 each having a flat blade 12 and a plurality of curved blades 13-15 arranged in the longitudinal direction of the blade 12 are respectively attached to blowing-out ports 21-24 provided to the casing 1. The curvature of the curved blades 13-15 is made larger toward the front side from the rear side in the rotating direction of the turbofan 2 and, at the same time, the intervals between the blades 13-15 are made narrower as going toward the front side from the rear side in the rotating direction of the turbofan 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor unit of an air conditioner using a turbo fan that blows out sucked air radially outward with respect to an axis.

[0002]

2. Description of the Related Art Conventionally, as an indoor unit of an air conditioner, a cross fin heat exchanger and a cross flow fan are arranged in a substantially rectangular casing mounted on a wall surface, and are provided below the casing. Some air-conditioning air is blown out from the air outlet. However, the indoor unit of the air conditioner has a drawback that it does not fit the interior of the room because the protrusion from the wall surface is large and the depth cannot be reduced. Therefore, the present applicant has manufactured an indoor unit of an air conditioner that can improve the interior characteristics of a room by reducing the thickness. The indoor unit of this air conditioner has a heat exchanger in which a shaft is disposed in the casing in the front-rear direction, and is disposed on the rear side of the heat exchanger in the casing, and receives air sucked from the front side with respect to the shaft. A turbo fan that blows outward in the radial direction. The casing is provided with outlets for blowing in four directions, that is, up and down and left and right. When the turbo fan is rotated, the air sucked in from the inlet on the front side is blown out from each outlet in four directions.

[0003]

By the way, in the indoor unit of the air conditioner using the turbo fan, the flow of the air blown out from the turbo fan by the plane blade and the plurality of curved blades attached to the outlet of the casing. However, the air blown out of the turbo fan blows outward at a front side in the rotation direction of the turbo fan and approximately 40 degrees outward with respect to a tangent to the outer periphery of the turbo fan. For this reason, there is a problem that the air is not blown out in a direction along a plane substantially perpendicular to the longitudinal direction of the air outlet of the casing, and desired air blowing performance cannot be obtained. That is, since the plurality of curved blades have the same shape, and the intervals between them are substantially the same, a direction along a plane substantially perpendicular to the longitudinal direction of the outlet on the front side in the rotation direction of the turbofan. If the shape of the curved surface of each curved blade is made uniform so that it blows out, the angle of incidence of the airflow with respect to the blade surface of the rear curved blade becomes large, and separation occurs, while the rear in the rotation direction of the turbo fan When the shape of the curved surface of each curved blade is aligned so that the air blows out in a direction along a plane substantially perpendicular to the longitudinal direction of the outlet on the side, the air flow is incident on the blade surface of the curved blade on the front side Since the angle becomes large and separation occurs, there is a problem that the air flow is not efficiently rectified and noise is generated by the separation. In addition, when the intervals between the curved blades adjacent to each other are aligned so that the rectification is optimized on the front side in the rotation direction of the turbofan, the rectification effect of the curved blades on the rear side is reduced, while the rotation direction of the turbofan in the rotation direction is reduced. If the intervals between the curved blades adjacent to each other are made uniform so that the rectification is optimized on the rear side, the rectification effect of the curved blades on the front side is reduced, so that the air flow cannot be rectified efficiently.

An object of the present invention is to provide an indoor unit of an air conditioner capable of efficiently rectifying blown air and reducing noise.

[0005]

In order to achieve the above object, the air conditioner indoor unit according to the first aspect of the present invention is characterized in that the air sucked from the front side by a turbo fan arranged in a casing has a radius relative to a shaft. An indoor unit of an air conditioner that blows outward in a direction, wherein the plane blades attached to an air outlet provided in the casing are arranged in the air outlet in a longitudinal direction of the plane blade, and a rotation direction of the turbo fan. And a plurality of curved blades whose curvature increases from the rear side to the front side.

According to the indoor unit of the air conditioner of the first aspect, the air sucked from the front side by the turbo fan is rotated outward by, for example, about 40 degrees with respect to a tangent on the outer periphery of the turbo fan. Spout at an angle. Then, the airflow is rectified along the blade surfaces of the plane blade and the plurality of curved blades attached to the outlet of the casing. At this time, while the angle of the airflow with respect to the longitudinal direction of the outlet is larger on the rear side of the outlet of the turbo fan in the rotation direction of the turbo fan, the longitudinal direction of the outlet is on the front side of the direction of rotation of the turbo fan of the outlet. The angle of the airflow with respect to Therefore, by increasing the curvature of the curved blades from the rear side to the front side in the rotation direction of the turbofan so as to reduce the incident angle of the airflow of all the curved blades, the airflow The air rectified by the plane blade and the plurality of curved blades is blown out from the outlet in a desired direction (for example, blown along a plane perpendicular to the longitudinal direction of the outlet) without peeling off. Therefore, the air blown out from the turbo fan can be efficiently rectified, and noise can be reduced.

The indoor unit of the air conditioner according to claim 2 is
The indoor unit of the air conditioner according to claim 1, wherein the region in which the plurality of curved blades are arranged is divided into a plurality of regions, and the magnitude of the curvature of the curved blade is different for each of the plurality of divided regions. It is characterized by doing.

According to the indoor unit of the air conditioner of the second aspect, by making the curvature of the curved blades equal in each of the divided areas, the air flow in the longitudinal direction of the air outlet is reduced. In accordance with the change in the angle, the design of the curved surfaces of all the curved blades can be simplified as compared with the case where the shapes are optimally designed. In addition, efficient commutation and noise can be reduced with a simple configuration, and the cost can be reduced.

The indoor unit of the air conditioner according to claim 3 is
An air conditioner indoor unit that blows air sucked from the front side radially outward with respect to an axis by a turbo fan arranged in a casing, wherein the plane blade is attached to an outlet provided in the casing. And a plurality of curved blades which are arranged in the blowout port in the longitudinal direction of the flat blades, and whose intervals adjacent to each other become narrower from the rear side to the front side in the rotation direction of the turbofan. I have.

According to the air conditioner indoor unit of the third aspect, the air sucked from the front side by the turbo fan is rotated outward by about 40 degrees, for example, in a rotational direction with respect to a tangent on the outer periphery of the turbo fan. Spout at an angle. Then, the airflow is rectified along the blade surfaces of the plane blade and the plurality of curved blades attached to the outlet of the casing. At this time, while the angle of the airflow with respect to the longitudinal direction of the outlet is larger on the rear side of the outlet of the turbo fan in the rotation direction of the turbo fan, the longitudinal direction of the outlet is on the front side of the direction of rotation of the turbo fan of the outlet. The angle of the airflow with respect to Therefore, the plurality of curved blades are arranged such that the interval between the curved blades adjacent to each other decreases from the rear side to the front side in the rotation direction of the turbofan, and the curved blades on the rear side in the rotation direction of the turbofan are rectified. On the other hand, while reducing the effect, the curved vane on the front side in the rotation direction of the turbo fan at the outlet has a larger rectification effect, so that the rectification effect on the rear side in the rotation direction of the turbo fan is not unnecessarily increased. The airflow angle with respect to the longitudinal direction of the air outlet on the front side in the rotation direction of the turbo fan is reliably adjusted on the curved blade side, and the rectified air is blown out from the air outlet in a desired direction (e.g., of the air outlet). Blows out along a plane perpendicular to the longitudinal direction). Therefore, the air blown out from the turbo fan can be efficiently rectified, and noise can be reduced.

The indoor unit of the air conditioner according to claim 4 is:
The indoor unit of the air conditioner according to claim 3, wherein the region in which the plurality of curved blades are arranged is divided into a plurality of regions, and an interval between adjacent curved blades is different for each of the plurality of divided regions. It is characterized by doing.

According to the indoor unit of the air conditioner of the fourth aspect, by making the interval between the curved blades adjacent to each other in each of the divided areas equal to each other, the air flow in the longitudinal direction of the outlet can be reduced. In accordance with the change in the angle, the design can be simplified as compared with the case where all the intervals between the curved blades adjacent to each other are optimally designed, and the rectification and the noise can be efficiently reduced with a simple configuration, and the cost can be reduced.

The indoor unit of the air conditioner according to claim 5 is
The indoor unit of the air conditioner according to claim 1, wherein the plurality of curved blades are narrower in distance from a rear side to a front side in a rotation direction of the turbofan.

According to the indoor unit of the air conditioner of the fifth aspect, the interval between the plurality of curved blades is reduced from the rear side to the front side in the rotation direction of the turbofan. According to the angle change of the airflow with respect to the longitudinal direction of the outlet, the curved vanes on the rear side in the rotation direction of the turbo fan reduce the rectifying effect, while the curved blades on the front side in the rotational direction of the turbo fan at the outlet. Thus, the rectification effect is increased, and the air blown out from the turbo fan can be rectified more efficiently without increasing the rectification effect more than necessary, thereby reducing noise.

Further, the indoor unit of the air conditioner according to claim 6 is:
The indoor unit of the air conditioner according to claim 5, wherein the region in which the plurality of curved blades are arranged is divided into a plurality of regions, and the magnitude of the curvature of the curved blade is different for each of the plurality of divided regions. The distance between the curved blades adjacent to each other is different for each of the plurality of regions.

According to the indoor unit of the air conditioner of the sixth aspect, by making the magnitude of the curvature of the curved blades equal to the interval between the divided blades in each of the divided areas, the air outlet with respect to the longitudinal direction of the air outlet is provided. In accordance with the change in the angle of the airflow, the design can be simplified as compared to optimally designing the shapes of the curved surfaces of all the curved blades and the interval between the adjacent curved blades. Noise can be reduced, and costs can be reduced.

The indoor unit of the air conditioner according to claim 7 is:
The indoor unit of the air conditioner according to any one of claims 1 to 6, wherein the plane blade and the plurality of curved blades are integrally formed.

According to the indoor unit of the air conditioner of the present invention, the plane blade also serves as a support member for supporting the plurality of curved blades, and the number of parts is reduced, so that the air outlet structure can be simplified. Cost can be reduced.

The indoor unit of the air conditioner according to claim 8 is:
The indoor unit of the air conditioner according to any one of claims 1 to 7, wherein an incident angle of air blown out from the turbo fan is substantially the same in all regions of a front edge on the windward side of the plurality of curved blades. It is characterized by:

According to the indoor unit of the air conditioner of the eighth aspect, the incident angle of the air blown out from the turbo fan is substantially the same in the entire area of the front edge on the windward side of the plurality of curved blades. Thereby, the turbulence of the air flow can be reduced, and the noise can be further reduced.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an indoor unit of an air conditioner according to the present invention will be described in detail with reference to the illustrated embodiments.

FIG. 1 is a front view of an indoor unit of an air conditioner according to an embodiment of the present invention. The turbo fan has a shaft arranged in the front-rear direction and blows air sucked from the front side outward in the radial direction with respect to the shaft. Air flow control members 11 are attached to rectangular outlets 21 to 24 provided on both side surfaces and upper and lower surfaces of the casing 1, respectively. In FIG. 1,
For ease of explanation, a state where the front panel and the heat exchanger are removed is shown. In addition, 4 of the casing 1
Guide portions 31 to 34 for guiding the air blown out from the turbo fan 2 are attached near the corners.

FIG. 2 is an enlarged view of a section taken along the line II-II in FIG. 1. A motor 3 is mounted substantially at the center of a casing 1, and a turbo fan 2 is mounted on an output shaft 3a of the motor 3. Attached. A partition plate 4 having a circular hole 4a substantially at the center is attached to the casing 1 on the front side of the turbo fan 2. Then, a heat exchanger 5 is attached to the front side of the partition plate 4. A front panel 6 having a suction port 6a is attached to the front side of the casing 1 so as to cover the heat exchanger 5. A front grille 7 is attached to the inlet 6a of the front panel 6.

FIG. 3 is a perspective view of the air flow control member 11, and the air flow control member 11 is provided with a substantially rectangular flat blade 12 and standing upright at an interval from the flat blade 12. And a plurality of curved blades 13, 14, 15 having a curved surface whose bus is substantially perpendicular to the plane blade 12. Arms 16 and 18 are provided upright at both ends of the plane blade 12. A rotating shaft 17 is provided on the tip side of the arm 16 toward the outside in the longitudinal direction of the plane blade 12. On the other hand, a connecting portion 29 is provided on the distal end side of the arm 18 on the outer side in the longitudinal direction of the plane blade 12. Further, ribs 25 and 26 are provided on the flat blade 12 side of the arm 16 and the arm 1
8 are provided with ribs 27 and 28 on the side of the plane blade 12. An output shaft of a stepping motor (not shown) is connected to the connection portion 29, and the airflow control member 11 is rotated about the output shaft and the rotation shaft 17.

The plurality of curved blades 13, 14, 15
Are divided into regions A, B, and C. In region A, four curved blades 13 are arranged at approximately 18.5 mm intervals, and in region B, four curved blades 16 are arranged at approximately 17 mm intervals. The eight curved blades 15 are arranged in the area C by approximately 15 mm.
They are arranged at intervals. In addition, the curved blades 13, 14, 1
5 is the direction of rotation of the turbo fan 2 (arrow R in FIG. 1).
Area A, B, C from the front side to the rear side (direction 1)
, And the area A,
The intervals between the curved blades adjacent to each other in the order of B and C are narrowed. The distance between the area A and the area B and the area between the area B and the area C may be the same as one of the areas on both sides, or may be an average value of the respective intervals between the two areas.

FIG. 4 is an enlarged view around the outlet 21 of FIG. As shown in FIG. 4, the wall thickness of the casing 1 gradually increases from the vicinity of the turbofan 2 toward the outlet 21 so that the air blown from the turbofan 2 is blown obliquely forward in the vicinity of the outlet 21. A guide portion 1a is formed. In addition, a guide member 20 that gradually becomes thinner from the vicinity of the turbofan 2 toward the air outlet 21 is disposed at a position on the front side of the casing 1 opposite to the guide portion 1a. The air flow control member 11 is attached to the outlet 21 so as to be rotatable about the rotation shaft 17.
FIG. 4 shows a state where the airflow control member 11 is fully opened.

In the air conditioner indoor unit having the above configuration,
As shown in FIG. 2, when the motor 3 is rotated to rotate the turbo fan 2 in a counterclockwise direction (the direction of arrow R1), air is sucked from the front side in the directions of arrows R2 and R4, and the turbo fan 2 is rotated. The air blown out in the direction of arrows R3 and R5 outward in the radial direction of FIG.
Plane blade 12 and curved blade 1 of airflow control member 11 shown in FIG.
Guided along the wing surfaces of 3, 14, 15
2 (only the outlets 21 and 22 are shown in FIG. 2) and blows obliquely forward. At this time, as shown in FIG. 1, the wind direction of the air blown out from the lower outlet 24 has an angle θ1 with respect to the longitudinal direction of the The angle becomes θ2 (<θ1) with respect to the longitudinal direction of the outlet 24 on the front side in the rotation direction,
Rectification is performed by a curved blade 13 having a small curvature and a large interval, a curved blade 15 having a large curvature and a small interval, and a curved blade 14 and a plane blade 12 having a medium curvature and a moderate distance between the curved blades 13 and 15. Thus, the air is blown out along a plane substantially perpendicular to the longitudinal direction of the air outlet 24. Similarly,
The air blown out from the other outlets 21, 22, 23 also blows out along a plane substantially perpendicular to the longitudinal direction of each outlet.

As described above, the plurality of curved blades 13 are arranged from the rear side to the front side in the rotation direction of the turbo fan 2.
The curvature of the curved blades 14 and 15 is increased so that all the curved blades 13 and 1
By making the incident angles of the airflows 4 and 15 small, the airflow is blown out from the outlets 21 to 24 along a plane perpendicular to the longitudinal direction of the outlets 21 to 24. Therefore, the air blown out from the turbo fan can be efficiently rectified, and the noise can be reduced.

Further, the plurality of curved blades 13, 14, 15
Is divided into regions A, B, and C, and the size of the curved blades is different for each of the divided regions A, B, and C. In accordance with the change in the angle of the airflow with respect to the direction, the design can be simplified as compared with the case where the shape of the curved surface of all the curved blades is optimally designed. Can be reduced.

Further, by making the curved blades 13, 14, 15 narrower from the rear side to the front side in the rotation direction of the turbo fan, the air outlet 21 is formed.
Since the rectification effect of the outlets 21 to 24 on the front side in the rotation direction of the turbo fan 2 is increased without unnecessarily increasing the rectification effect on the rear side in the rotation direction of the turbo fan 2, the turbo fan 2 It is possible to more efficiently rectify the air blown out from the hopper and reduce noise.

The flat blade 12 and the curved blade 13,
14 and 15 are integrally formed, and the plane blade 12 also serves as a support member for supporting the curved blades 13, 14, 15 so that the number of parts is reduced, so that the outlet structure can be simplified and the cost can be reduced. can do.

As shown in FIG. 4, when the air flow control member 11 is fully opened, the curved blades 13, 14, 15 (FIG.
Only one of the curved blades 15 is shown).
5a is such that the incident angle of the air flow (θ3 shown in FIG. 4) is substantially the same in any region with respect to the wind direction of the air blown out from the turbo fan 2, so that the turbulence of the air flow is small, Further, noise can be reduced.

In the above embodiment, the turbo fan 2
Curved blade 1 from the rear side to the front side in the rotation direction of
Although the curvature of the curved blades 3, 14, 15 is increased and the interval between the curved blades adjacent to each other is reduced, the curved blades 13, 14,.
15 may be increased so that the intervals between the adjacent curved blades may be substantially the same, or the curved blades 13, 14, 15 may be arranged from the rear side to the front side in the rotation direction of the turbofan 2.
May have the same curved surface shape to narrow the interval between adjacent curved blades.

In the above-described embodiment, as shown in FIG. 3, the area A of the curved blade 13 is divided into three areas, the area B and the area C of the curved blade 15, and the areas A, The magnitude of the curvature of the curved blades 13, 14, 15 and the distance between the adjacent curved blades are set for each of B and C. However, the magnitude of the curvature of the curved blades may be continuously changed, or the distance between the curved blades may be changed. May be changed continuously.

Further, in the above embodiment, the plane blade and the curved blade are formed integrally, but the plane blade and the curved blade may be separately manufactured and then combined.

Further, in the above embodiment, when the airflow control member 11 is fully opened, the incident angle of the airflow is substantially the same in any region of the front edge 15a on the windward side of the curved blades 13, 14, 15. However, it may be set appropriately according to the wind direction of the air blown out from the turbo fan.

[0037]

As is apparent from the above description, the air conditioner indoor unit according to the first aspect of the present invention uses a turbofan disposed in a casing to direct air sucked from the front side outward in the radial direction with respect to the shaft. An indoor unit of an air conditioner that blows air to the plane blades attached to an air outlet provided in the casing, and is arranged in the air outlet in a longitudinal direction of the plane blades, from the rear side in the rotation direction of the turbo fan. And a plurality of curved blades whose curvature increases toward the front side.

Therefore, according to the air conditioner indoor unit of the first aspect of the present invention, the curvature of the curved blade is increased from the rear side to the front side in the rotation direction of the turbo fan,
By making the angle of incidence of the airflow of all the curved blades small, the air rectified by the plane blade and the plurality of curved blades can be discharged from the outlet through the air outlet without causing separation of the airflow at the curved blades. Since the air is blown out in the direction, the air blown out from the turbo fan can be efficiently rectified, and noise can be reduced.

According to a second aspect of the present invention, in the indoor unit of the air conditioner of the first aspect, the area in which the plurality of curved blades are arranged is divided into a plurality of areas.
Since the size of the curved blade is different for each of the plurality of divided areas, the shapes of the curved surfaces of all the curved blades are optimized according to the change in the angle of the airflow with respect to the longitudinal direction of the outlet. Therefore, the design can be simplified as compared with the case of designing in a simple manner, the rectification and the noise can be efficiently reduced with a simple configuration, and the cost can be reduced.

The indoor unit of the air conditioner according to the third aspect of the present invention is an indoor unit of an air conditioner in which the air taken in from the front side is blown radially outward with respect to the axis by a turbofan disposed in a casing. A plane blade attached to an outlet provided in the casing,
The air outlet comprises a plurality of curved blades which are arranged in the longitudinal direction of the plane blades, and whose intervals adjacent to each other become narrower from the rear side to the front side in the rotation direction of the turbofan.

Therefore, according to the indoor unit of the air conditioner of the third aspect of the present invention, the interval between the curved blades adjacent to each other is narrowed from the rear side to the front side in the rotation direction of the turbo fan. Thus, while the rectifying effect is reduced in the curved blades on the rear side in the rotation direction of the turbofan, the rectifying effect is increased in the curved blades on the front side in the rotating direction of the turbofan at the outlet, thereby increasing the turbocharger effect. Without increasing the rectifying effect on the rear side in the rotation direction of the fan more than necessary, rectification is reliably performed on the curved blade side where the angle of the airflow with respect to the longitudinal direction of the air outlet is small on the front side in the rotation direction of the turbofan. Since the rectified air is blown out from the outlet in a desired direction, the air blown out from the turbo fan can be efficiently rectified and noise can be reduced. That.

According to a fourth aspect of the present invention, in the indoor unit of the air conditioner of the third aspect, the area in which the plurality of curved blades are arranged is divided into a plurality of areas.
Since the intervals between the curved blades adjacent to each other are different for each of the plurality of divided regions, the intervals between the curved blades adjacent to each other are all optimally adjusted according to a change in the angle of the airflow with respect to the longitudinal direction of the outlet. The design can be simplified as compared with the design, and the rectification and the noise can be efficiently reduced with a simple configuration, and the cost can be reduced.

According to a fifth aspect of the present invention, there is provided the air conditioner indoor unit according to the first aspect, wherein the plurality of curved blades are arranged from the rear side to the front side in the rotation direction of the turbo fan. Since the distance between the air outlets becomes narrower, the angle of the airflow with respect to the longitudinal direction of the air outlet varies.
On the curved blades on the rear side in the rotation direction of the turbofan, the rectifying effect is reduced, while on the curved blades on the front side in the rotating direction of the turbofan at the outlet, the rectifying effect is increased to increase the rectifying effect more than necessary. Therefore, the air blown out from the turbo fan can be rectified more efficiently, and the noise can be reduced.

According to a sixth aspect of the present invention, in the indoor unit of the air conditioner according to the fifth aspect, the area in which the plurality of curved blades are arranged is divided into a plurality of areas.
Since the curvature of the curved blade is different for each of the plurality of divided regions, and the interval between the adjacent curved blades is different for each of the plurality of regions, the airflow in the longitudinal direction of the outlet is different. In accordance with the change in the angle, the design of the curved surfaces of all the curved blades and the spacing between the adjacent curved blades can be simplified as compared with the case of optimally designing the curved blades. In addition, efficient commutation and noise reduction can be achieved with a simple configuration. And cost can be reduced.

According to a seventh aspect of the present invention, there is provided an air conditioner indoor unit according to any one of the first to sixth aspects, wherein the plane blade and the plurality of curved blades are integrally formed. Since the flat blade is formed, the plane blade also serves as a support member for supporting a plurality of curved blades, and the number of components is reduced, whereby the outlet structure can be simplified and the cost can be reduced.

The indoor unit of the air conditioner according to the invention of claim 8 is the indoor unit of the air conditioner according to any one of claims 1 to 7, wherein all of the front edges on the windward side of the plurality of curved blades are provided. Since the angle of incidence of the air blown out from the turbo fan is substantially the same in the region, the turbulence of the air flow can be reduced, and the noise can be further reduced.

[Brief description of the drawings]

FIG. 1 is a front view of an indoor unit of an air conditioner according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of the indoor unit as viewed from II-II.

FIG. 3 is a perspective view of a flat blade and a curved blade of the indoor unit.

FIG. 4 is an enlarged view of a main part of an air outlet of the indoor unit in FIG. 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Casing, 2 ... Turbo fan, 3 ... Motor, 4 ...
Partition plate, 5: heat exchanger, 6: front panel, 7: front grille, 11: air flow rectifying member, 12: plane blade, 13, 1
4, 15 ... curved blades.

Claims (8)

[Claims] 1. An indoor unit of an air conditioner in which air taken in from a front side is blown radially outward with respect to an axis by a turbo fan (2) disposed in a casing (1), wherein the casing ( 1) a plane blade (12) attached to an air outlet (21 to 24) provided in the air outlet (21 to 24), the air outlet (21 to 24) being arranged in the longitudinal direction of the plane blade (12), An indoor unit of an air conditioner, comprising: a plurality of curved blades (13 to 15) whose curvature increases from the rear side to the front side in the rotation direction of 2). 2. The indoor unit of an air conditioner according to claim 1, wherein the area in which the plurality of curved blades (13 to 15) are arranged is divided into a plurality of areas, and each of the divided areas is divided into a plurality of areas. An indoor unit for an air conditioner, wherein the curved blades have different degrees of curvature. 3. An indoor unit of an air conditioner in which air sucked from a front side is blown radially outward with respect to an axis by a turbo fan (2) arranged in a casing (1), wherein the casing ( 1) a plane blade (12) attached to an air outlet (21 to 24) provided in the air outlet (21 to 24), the air outlet (21 to 24) being arranged in the longitudinal direction of the plane blade (12), An indoor unit of an air conditioner, comprising: a plurality of curved blades (13 to 15) whose intervals adjacent to each other decrease from the rear side to the front side in the rotation direction of 2). 4. The indoor unit for an air conditioner according to claim 3, wherein the area in which the plurality of curved blades (13 to 15) are arranged is divided into a plurality of areas, and each of the divided areas is divided into a plurality of areas. An indoor unit for an air conditioner, wherein the distance between curved blades adjacent to each other is different. 5. The indoor unit of an air conditioner according to claim 1, wherein the plurality of curved blades (13 to 15) are provided with the turbo fan.
(2) An indoor unit of an air conditioner, wherein the distance between the rotation direction and the rotation direction decreases from the rear side to the front side. 6. The indoor unit for an air conditioner according to claim 5, wherein the area in which the plurality of curved blades (13 to 15) are arranged is divided into a plurality of areas, and each of the divided areas is divided into a plurality of areas. An air conditioner indoor unit characterized in that the curved blades have different degrees of curvature and the intervals between the adjacent curved blades are different for each of the plurality of regions. 7. The indoor unit of an air conditioner according to claim 1, wherein the plane blade (12) and the plurality of curved blades (13 to 15).
An indoor unit of an air conditioner, wherein the air conditioner is integrally formed. 8. The indoor unit of an air conditioner according to claim 1, wherein the turbo fan (13) is provided in the entire area of the front edge on the windward side of the plurality of curved blades (13 to 15). An indoor unit of an air conditioner, wherein the angles of incidence of the air blown out from 2) are substantially the same.