WO2013001823A1

WO2013001823A1 - Air conditioner

Info

Publication number: WO2013001823A1
Application number: PCT/JP2012/004206
Authority: WO
Inventors: 正美林; 弘祥上島; 輝夫藤社
Original assignee: パナソニック株式会社
Priority date: 2011-06-30
Filing date: 2012-06-28
Publication date: 2013-01-03
Also published as: JP2013011413A; JP4947227B1

Abstract

For an air conditioner having an indoor unit equipped with upper/lower air-direction-changing vanes, including an upper vane and a lower vane, and with a left/right air-direction-changing vane, the upper/lower air-direction-changing vanes each have a narrow part located between the side walls of the discharge port, and a wide part located to the front of the narrow part. The width of the narrow part is less than the width of the discharge port, the width of the wide part is greater than the width of the discharge port, and of the upper vane and the lower vane, protruding parts that extend outward from the upstream side toward the downstream side are provided on at least the lower vane near both ends of the wide part, thus improving the left/right air direction change performance.

Description

Air conditioner

The present invention relates to an air conditioner in which an indoor unit is provided with a wind direction changing blade that changes the direction of air blown from a blowout port, and performs air conditioning operation by controlling the wind direction changing blade, and in particular, air blown from the blowout port It is related with the shape of the up-and-down wind direction change blade | wing which changes direction of.

The conventional air conditioner is provided with a wind direction changing blade that changes the direction of the air blown out from the outlet of the indoor unit. The wind direction changing blade is composed of an up / down air direction changing blade that changes the direction of the air blown from the air outlet up and down and a left / right wind direction changing blade that changes the direction of the air blown out from the air outlet to the left and right.

The vertical wind direction changing blade is usually composed of one blade, and when the air conditioner stops, the air outlet rotates to cover the air outlet with the vertical air direction changing blade, so the horizontal width of the air direction changing blade is set slightly narrower than the width of the air outlet. During the operation of the air conditioner, the air outlet is opened, and the direction of the air blown from the air outlet is changed up and down. The left and right wind direction change blades are composed of two pairs, left and right, with a plurality of left and right blades fixed to the connecting rail to be rotatable in the left and right directions at the outlet, and are blown out by changing the direction of the left and right blades. You can change the direction of the left and right air.

Also, there are some which are provided with a blowing wind guide on the vertical wind direction changing blade to guide the blowing wind to the outside (for example, refer to Patent Documents 1 and 2).

JP-A-6-288605 JP 2006-177603 A

However, in the conventional configuration, the blowout air guide provided on the up / down airflow direction changing blade is located in front of the blowout port (that is, located on the front side). Therefore, when the angle of the left and right wind direction changing blades is the same as the angle of the blowing wind guide, the blowing wind guide effect by the blowing wind guide can be obtained, but when the angles do not match, the blowing wind guide itself is There is a problem that the effect of guiding the blowing wind by the blowing wind guide cannot be sufficiently obtained, and the ability to change the right and left wind directions cannot be obtained sufficiently.

The present invention has been made in view of such a problem of the prior art, and an object of the present invention is to provide an air conditioner that can improve the performance of changing the right and left wind directions.

In order to achieve the above object, the present invention is configured as follows.

According to the first aspect of the present invention, in an indoor unit of an air conditioner, an up-and-down air direction changing blade having an upper blade and a lower blade that changes the direction of the air blown from the air outlet up and down, and the air direction Left and right wind direction changing vanes, and the up and down air direction changing vanes have a narrow portion located between both side walls of the outlet and a wide portion located in front of the narrow portion. The width of the narrow portion is shorter than the width of the outlet, the width of the wide portion is longer than the width of the outlet, and at least the lower blade of the upper blade and the lower blade has a width of the wide portion. Provided is an air conditioner having protrusions extending from the upstream side toward the downstream side and the outside in the vicinity of both ends.

According to the 2nd aspect of this invention, in the indoor unit of an air conditioner, the up-and-down air direction change blade | wing which has the upper blade | wing and lower blade | wing which change up and down the direction of the air which blows off from a blower outlet, and the direction of air Left and right wind direction changing vanes, and the up and down air direction changing vanes have a narrow portion located between both side walls of the outlet and a wide portion located in front of the narrow portion. The width of the narrow portion is shorter than the width of the outlet, the width of the wide portion is longer than the width of the outlet, and at least the lower blade of the upper blade and the lower blade has the narrow portion. A projecting portion extending from the upstream side toward the downstream side and the outside from the enlarged portion to the wide portion in the vicinity of both ends of the lower blade; An air conditioner provided with an air conditioner is provided.

According to the present invention, the up-and-down wind direction changing blade has a narrow portion located between both side walls of the air outlet and a wide portion located in front of the narrow portion, and the lateral width of the narrow portion is the air outlet. The width of the wide portion is shorter than the width of the outlet, and at least the lower blade of the upper blade and the lower blade has protrusions extending from the upstream side toward the downstream side and the outer side in the vicinity of both ends of the wide portion. Provided. With this projection, the ability to change the left and right wind direction can be enhanced.

The up-and-down wind direction changing blade has a narrow portion located between both side walls of the air outlet, and a wide portion located in front of the narrow portion, and the lateral width of the narrow portion is larger than the lateral width of the air outlet. The width of the short and wide portion is longer than the width of the outlet, and at least the lower blade of the upper blade and the lower blade has an enlarged portion whose width gradually increases from the narrow portion toward the wide portion. Protrusions extending from the upstream side to the downstream side and to the outside are provided in the vicinity of both ends from the enlarged portion to the wide portion. With this projection, the ability to change the left and right wind direction can be enhanced.

The external view of the indoor unit which comprises the air conditioner which concerns on embodiment of this invention, and the enlarged view of a projection part installation part Cross section of the indoor unit of FIG. Partial sectional view of the indoor unit in FIG. 2 along line AA and an enlarged view of the protrusion installation portion Plan view of lower blade according to this embodiment Sectional view of the lower blade along line BB in FIG. Cross-sectional view of lower blade taken along line CC in FIG. Sectional view corresponding to a partial sectional view taken along line AA of the indoor unit of FIG. 2, which is an air conditioner according to a modification of the present invention

An air conditioner according to a first aspect of the present invention is an indoor unit in which an up / down wind direction changing blade having an upper blade and a lower blade that changes the direction of the air blown from the air outlet up and down, and the air direction is changed left and right. Left and right wind direction changing blades, and the up and down wind direction changing blades have a narrow portion located between both side walls of the outlet, and a wide portion located in front of the narrow portion, the width The width of the narrow portion is shorter than the width of the outlet, the width of the wide portion is longer than the width of the outlet, and at least the lower blade of the upper blade and the lower blade is near both ends of the wide portion, Protrusions extending from the upstream side to the downstream side and to the outside are provided.

Thus, the blowing angle is changed by the right and left wind direction changing blades, and the air that is going to move forward as it moves away from the left and right blades is guided by the projections and guided to the outside, and the air can be blown out in a desired direction. In addition, since the protrusions are formed in the vicinity of both ends of the wide portion whose width is longer than the width of the outlet, even if the angle of the left / right wind direction changing blades does not match the angle of the protrusions, the protrusions Will not hinder. Therefore, in the air conditioner, it is possible to improve the performance of changing the left and right wind directions.

An air conditioner according to a second aspect of the present invention is an indoor unit in which an up / down wind direction changing blade having an upper blade and a lower blade that changes the direction of the air blown from the air outlet up and down, and the air direction is changed to the left and right. Left and right wind direction changing blades, and the up and down wind direction changing blades have a narrow portion located between both side walls of the outlet, and a wide portion located in front of the narrow portion, the width The width of the narrow portion is shorter than the width of the outlet, the width of the wide portion is longer than the width of the outlet, and at least the lower blade of the upper blade and the lower blade is wider than the narrow portion. A projecting portion extending from the upstream side to the downstream side and to the outside from the enlarged portion to the wide portion is provided near both ends of the lower blade. .

Thus, the blowing angle is changed by the right and left wind direction changing blades, and the air that is going to move forward as it moves away from the left and right blades is guided by the projections and guided to the outside, and the air can be blown out in a desired direction. Further, the lower blade has a wide portion whose width is longer than the width of the outlet, and an enlarged portion in which the width gradually increases from the narrow portion toward the wide portion. A protrusion is formed so as to extend over the wide portion. Therefore, even if the angle of the right and left wind direction changing blades and the angle of the protrusion do not match, the protrusion does not hinder the blowing air. Therefore, in the air conditioner, it is possible to improve the performance of changing the left and right wind directions.

According to a third aspect of the present invention, in the air conditioner of the first or second aspect, the upstream end of the projection is located downstream of the side wall of the outlet, and the downstream end of the projection is the blower from the upstream end. It is located outward in the width direction of the exit. Even when the angle of the right and left wind direction changing blades and the angle of the protrusions do not coincide with each other, the protrusions can be prevented from obstructing the blowing air.

Fourthly, in the air conditioner according to the first or second aspect of the present invention, the protrusion is formed to bulge forward from the upstream end toward the downstream end and smoothly draw an arc. As a result, it is possible to suppress the vortex shedding in the process of the blowing air from the upstream end to the downstream end, and to suppress the generation of noise.

5th invention is the air conditioner of 1st to 4th invention, The said projection part is formed from two projection parts, an inner projection part and an outer projection part, The said inner projection part and the said The distance between the outer protrusions is gradually increased from the upstream end toward the downstream end. As a result, it is possible to suppress the vortex shedding in the process of the blowing air from the upstream end to the downstream end, and to suppress the generation of noise.

According to a sixth aspect of the present invention, in the air conditioner of the first to fifth aspects of the invention, the longitudinal direction surface of the projection on the outlet side is from the upstream end toward the downstream end with respect to the surface of the up / down airflow direction changing blade. The slope is gradually increased. As a result, it is possible to suppress the vortex shedding in the process of the blowing air from the upstream end to the downstream end, and to suppress the generation of noise.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiment.

(Embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings.

An air conditioner used in a general home is usually composed of an indoor unit and an outdoor unit connected to each other by refrigerant piping, and FIG. 1 shows the indoor unit of the air conditioner according to the present invention. 2 shows a cross-sectional view of the indoor unit shown in FIG. 1, and FIG. 3 shows a partial cross-sectional view taken along line AA in the indoor unit shown in FIG. .

As shown in FIG. 1, the indoor unit 1 includes an exterior and a housing that are composed of a frame 2 for mounting on a wall, a front grill 3, and a front panel 4 attached to the front grill 3.

In addition, as shown in FIG. 2, the indoor unit 1 includes a fan 6 for exchanging the indoor air taken in from the top opening 3 a and the front opening 3 b in the heat exchanger 5 and blowing it out into the room. The upper blade 8 and the lower blade 9 (upper and lower airflow direction changing blades) that open and close the air outlet 7 that blows heat-exchanging air into the room and change the air blowing direction up and down, the upper surface opening 3a and the front surface opening 3b Between the heat exchanger 5, a filter 11 is provided for removing dust contained in room air taken from the upper surface opening 3a and the front surface opening 3b.

The ventilation path 15 is configured to be surrounded by respective surfaces, with the rear case 2a of the underframe 2 as a bottom surface, the stabilizer 12a of the blowing grill 12 as a ceiling surface, and the side walls 12b of the blowing grill 12 as both side surfaces. In addition, the outlet of the ventilation path 15 is a blower outlet 7. That is, in the indoor unit 1 of the present embodiment, the air outlet 7 is located at the edge of the side wall 12b on the downstream side in the blowing direction. A plurality of left and right blades 10 are connected by a connecting bar 13 and can be rotated in the left-right direction. A pair of left blades 10a positioned on the left side when viewed from the front of the indoor unit 1 and a right side blade 10 are positioned on the right side. And a pair of right blades 10b. The left blade 10a and the right blade 10b are arranged in the ventilation path 15, and can be changed to the left and right by blowing the air to a desired angle in the left-right direction.

When the air conditioner starts operation, the upper blade 8 and the lower blade 9 are controlled to open, the air outlet 7 is opened, and the fan 6 is driven so that the room air passes through the front opening 3b and the upper opening 3a. Through the interior of the indoor unit 1. The taken-in room air exchanges heat with the heat exchanger 5, passes through the fan 6, passes through the ventilation path 15 formed on the downstream side of the fan 6, and is blown out from the outlet 7.

The term “stabilizer” described above is located near the downstream of the fan 6, stabilizes the vortex generated near the front of the fan 6, and is located downstream of the stabilizer and conveyed by the fan 6. Although it can also be divided into the front wall portion of the diffuser responsible for air pressure recovery, these are collectively referred to as “stabilizer” in the present specification.

Here, the shape of the up-and-down wind direction changing blade including the upper blade 8 and the lower blade 9 will be described in detail.

As shown in FIG. 3, the lower blade 9 is supported by a drive shaft 9 a so as to be rotatable in the vertical direction, and the drive shaft 9 a is rotatably supported by both side walls 12 b of the blow grill 12 and the blow grill. 12 is driven to rotate by a drive motor (not shown) provided outside.

In the air conditioner of the present embodiment, the width of the lower blade 9 (the length in the left-right direction in FIG. 3) is not constant. Specifically, the lower blades 9 are disposed between the narrow side portions 9b between the side walls 12b of the blowout grill 12 and the front sides of both sides of the blowout port 7 located above the narrow portion 9b when the air conditioner is stopped. And a wide portion 9 c that covers the grill 3. The lateral width (the length in the left-right direction) of the narrow portion 9b is set slightly shorter than the lateral width of the air outlet 7, and the lateral width of the wide portion 9c is set longer than the lateral width of the air outlet 7. In the indoor unit 1 of the present embodiment, the length between the side walls 12b is the lateral width of the air outlet 7.

Similarly, the width of the upper blade 8 is not constant. Specifically, the upper blade 8 is supported by a drive shaft 8a so as to be rotatable in the vertical direction (see FIG. 1), and the drive shaft 8a is rotatably supported by both side walls 12b of the blowing grill 12. The upper blade 8 is a connecting portion with the drive shaft 8a, and is located above the narrow portion 8b between the side walls 12b of the blow grill 12 and the narrow portion 8b when the air conditioner is stopped. And a wide portion 8c covering the front grille 3 on both sides. The lateral width (length in the left-right direction) of the narrow portion 8 b is set slightly shorter than the lateral width of the blowout port 7, and the lateral width of the wide portion 8 c is set longer than the lateral width of the blowout port 7.

By setting the up / down wind direction changing blades in this way, on the upstream side of the air outlet 7, the blowing air is sandwiched between the lower blade 9, the upper blade 8, and the left and right side walls 12 b, and the wind direction is changed without leaking up, down, left and right. And blown out from the blowout port 7. Furthermore, on the outside (downstream side) of the air outlet 7, even if the blown air whose air direction has been changed to the left and right is blown further left and right than the left and right ends of the air outlet 7, the left and right side walls 12 b of the air outlet 7. In addition, it is possible to maintain the vertical and horizontal changing directions while suppressing the diffusion of the blowing air by the lower blade 9 and the upper blade 8 protruding outward.

The effect of maintaining the change direction of the blown wind up and down and left and right is greater as the width of the upper blade 8 and the lower blade 9 is longer. However, considering the design of the indoor unit, the width of the wide portions 8c and 9c is It is set to be approximately equal to the body width of 1. In addition, if the wide part 8c, 9c of the upper blade 8 and the lower blade 9 is formed so as to protrude outward at least from the left and right side walls 12b of the air outlet 7, it is possible to suppress the blowing air from diffusing, The effect which maintains the up-and-down and left-right change direction of a blowing wind can be acquired.

As shown in FIG. 3, the width of the wide portion 9 c of the lower blade 9 is set to be longer than the width of the air outlet 7. In the wide portion 9 c of the lower blade 9, the left and right portions protruding from the narrow portion 9 b are provided on the left and right sides on the surface that cannot be seen from the front of the indoor unit 1 when the lower blade 9 is closed. Two

protrusions

16 and 17 that extend outward are provided.

The protruding portion 16 and the protruding portion 17 have a smooth arc shape that bulges forward from the upstream ends 16a and 17a toward the downstream ends 16b and 17b.

In addition, the tangent line a and tangent line b that are in contact with the arcs of the upstream ends 16a and 17a set the angles of the

protrusions

16 and 17 so that they are substantially equal to the angle when the left and right blades 10 are tilted to the right. .

Furthermore, the upstream end 16a of the protrusion 16 starts from the outside of the side wall 12b of the blowing grill 12. Further, the upstream ends 16a and 17a of the

projections

16 and 17 are located downstream from the side wall 12b of the outlet 7, and the downstream ends 16b and 17b of the

projections

16 and 17 are further outlets from the upstream ends 16a and 17a. 7 is located outward in the width direction

FIG. 3 shows a case where the left and right blades 10 which are left and right changing blades are set to the left blowing and the right blade 10b are set to the left blowing and the right blowing, and the enlarged view of FIG. is there. The flow of air when the right and left blowing direction is set to the right side will be described with reference to this enlarged view.

First, when the case where the

protrusions

16 and 17 are not arranged is considered as a comparative example of the present embodiment, the path of the air sent out by the fan 6 is indicated by the arrow c by the left and right blades 10 whose angles are set to the right. As shown on the right. The angle of the air changed by the left and right blades 10 is smaller than the angle of the left and right blades 10 because the force by which the main flow of air moves forward is large. That is, even if the desired change angle of air is the same as the inclination angle of the left and right blades 10, the desired change angle cannot be obtained. Further, it is conceivable to increase the inclination angle of the left and right blades 10, but if it is increased, there is a limit that can be increased from the viewpoint of performance such as increased resistance when air is sent out and condensation during cooling operation. .

Next, the case where the protrusion 16 and the protrusion 17 are arranged, that is, the case of the present embodiment will be described. The upstream ends of the

protrusions

16 and 17 are in the mainstream (arrow c) whose angle is changed by the left and right blades 10, and a part of the blown air is guided by the

protrusions

16 and 17 to the right. The angle is changed in the direction (arrow d). The entrance angles of the upstream ends of the

protrusions

16 and 17 are set to be approximately equal to the maximum inclination angle of the left and right blades 10, so that air can easily follow the

protrusions

16 and 17. In addition, a smooth arc is drawn from the upstream end toward the downstream end, the angle of the air path can be changed outward, and the change angle of air that cannot be obtained by the left and right blades 10 alone can be compensated.

Further, the upstream ends of the

protrusions

16 and 17 are set outside the side wall 12b of the outlet grill 12 (outside the outlet 7). Even if the direction is opposite to the inclination, the air does not hit the

protrusions

16 and 17, so that air resistance does not occur.

Next, the shape of the protrusion 16 and the protrusion 17 will be described with reference to FIGS. 4, 5, and 6. 4 is a sectional view taken along the line BB (upstream side) of the

protrusions

16 and 17 in FIG. 4, and FIG. 6 is a sectional view taken along the line CC (downstream side) of the

protrusions

16 and 17 in FIG. Show. The interval between the protrusion 16 and the protrusion 17 is gradually increased from the upstream end toward the downstream end. The relationship between the upstream interval L1 and the downstream interval L2 shown in FIGS. 5 and 6 is set to L1 <L2. Further, the surface on the air outlet 7 side (surface on the front surface side) of the protrusion 16 and the protrusion 17 gradually increases in inclination from the upstream end toward the downstream end (inclination toward the rear from the front surface side). . The relationship between the upstream side tilt angle θ1 and the downstream side tilt angle θ2 shown in FIGS. 5 and 6 is set to θ1 <θ2. As a result, vortex shedding can be suppressed and the generation of noise can be suppressed in the process in which the blown air flows from the upstream end to the downstream end.

Furthermore, by providing an inclination to each of the

protrusions

16 and 17 and gradually increasing the inclination as described above, the air helps to bend the direction of the air along the slope.

Next, a measure (modification) for changing the angle of air further will be described with reference to FIG. A slope 12c is provided at the outlet portion of the side wall 12b of the blowing grill 12, and is smoothly connected to the side wall 12b. On the other hand, the lower blade 9 has a narrow width portion 9b located between both side walls 12b of the blowout port 7, a wide width portion 9c in front of the blowout port 7, and a width gradually from the narrow width portion 9b toward the wide width portion 9c. Is composed of a triangular area (enlarged portion) 9d that expands. The upstream ends of the

protrusions

16 and 17 are disposed in the triangular area 9d.

By providing the inclined surface 12c at the outlet portion of the side wall 12b of the blowing grill 12, the blowing air (arrow e) is blown along the inclined surface 12c, and the blowing angle becomes larger than when there is no inclined surface 12c. Thereby, the position which arrange | positions the projection part 16 and the projection part 17 can be closely approached to the blower outlet 7 side. Therefore, the blowing air (arrow f) can be bent from a position closer to the air outlet 7, and as a result, the air blowing angle can be further increased.

In the indoor unit according to this modification, a slope 12c is provided at the outlet portion of the side wall 12b of the blowout grill 12. Therefore, in this modification, the blower outlet 7 is located at the edge of both slopes 12c on the downstream side in the blowing direction (that is, the lower end of the slope 12c in FIG. 7), and the length between the edges of both slopes 12c is long. Sag is the width of the air outlet 7. In the example shown in FIG. 7, the case where the narrow portion 9b is located between the both side walls 12b has been described. However, the narrow portion 9b may be formed to be shorter than the lateral width of the air outlet 7; The narrow portion 9b may be formed between the inclined surfaces 12c.

It should be noted that, by appropriately combining arbitrary embodiments of the above-described various embodiments, the effects possessed by them can be produced.

In the air conditioner according to the present invention, the upper and lower airflow direction changing blades are composed of upper blades and lower blades, and the lower blades project a portion narrower than the width of the air outlet and a portion wider than the width of the air outlet at the end, A blowing air guide is formed in the protruding portion to improve the performance of changing the vertical and horizontal air directions, and is useful as various air conditioners including air conditioners and air purifiers used in general households.

Although the present invention has been fully described in connection with preferred embodiments with reference to the accompanying drawings, various changes and modifications will be apparent to those skilled in the art. Such changes and modifications are to be understood as being included therein, so long as they do not depart from the scope of the present invention according to the appended claims.

Japanese patent application No. filed on June 30, 2011. The disclosures of the specification, drawings, and claims of 2011-145182 are incorporated herein by reference in their entirety.

DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Underframe 2a Rear case 3 Front grille 3a Top opening 3b Front opening 4 Front panel 5 Heat exchanger 6 Fan 7 Outlet 8 Upper blade 8a Drive shaft 8b Narrow part 8c Wide part 9 Lower blade 9a Drive Shaft 9b Narrow part 9c Wide part 9d Triangle area 10 Left and right blades 10a Left blade 10b Right blade 11 Filter 12 Blowing grill 12a Stabilizer 12b Side wall 12c Slope 13 Connecting bar 15 Ventilation path 16 Projection 16a Upstream end 16b Downstream end 17 Projection

Claims

In air conditioner indoor units,
An up / down airflow direction changing blade having an upper blade and a lower blade that change the direction of air blown out from the air outlet;
With left and right wind direction changing blades that change the direction of air to the left and right,
The up-and-down wind direction changing blade has a narrow portion located between both side walls of the blowout port, and a wide portion located in front of the narrow portion, and a lateral width of the narrow portion is equal to that of the blowout port. The width of the wide portion is shorter than the width, and the width of the wide portion is longer than the width of the air outlet.At least the lower blade of the upper blade and the lower blade is located near both ends of the wide portion, from upstream to downstream and outward. Air conditioner with a protruding part that extends.
In air conditioner indoor units,
An up / down airflow direction changing blade having an upper blade and a lower blade that change the direction of air blown out from the air outlet;
With left and right wind direction changing blades that change the direction of air to the left and right,
The up-and-down wind direction changing blade has a narrow portion located between both side walls of the blowout port, and a wide portion located in front of the narrow portion, and a lateral width of the narrow portion is equal to that of the blowout port. Shorter than the width, the width of the wide portion is longer than the width of the outlet,
Of the upper blade and the lower blade, at least the lower blade has an enlarged portion whose width gradually increases from the narrow portion toward the wide portion, and the enlarged portion is located near both ends of the lower blade. An air conditioner provided with a protrusion extending from the upstream side toward the downstream side and outward from the wide part to the wide part.
The upstream end of the projection is located downstream from the side wall of the outlet, and the downstream end of the projection is positioned outward in the width direction of the outlet from the upstream end. Air conditioner.
The air conditioner according to claim 1 or 2, wherein the protrusion is formed so as to bulge forward from the upstream end toward the downstream end and smoothly draw an arc.
The protrusion is formed of two protrusions, an inner protrusion and an outer protrusion, so that the distance between the inner protrusion and the outer protrusion gradually increases from the upstream end toward the downstream end. The air conditioner according to any one of claims 1 to 4, wherein the air conditioner is formed.
The longitudinal surface on the outlet side of the protrusion is formed so that the inclination gradually increases with respect to the surface of the up / down airflow direction changing blade from the upstream end toward the downstream end. To 5. The air conditioner according to any one of 5 to 5.