KR20140004090A - Air conditioner - Google Patents

Abstract

The left and right sides of the blower outlet 10 are provided in the indoor unit of the air conditioner, and in the cross section along the wing surface in the state in which the up-and-down wind direction change blade which changes the direction of the air blown out from the blower outlet 10 up and down is the most downward. The shape of the side wall at the time of seeing the side wall 34 of this in front is made into the shape which spreads outward toward the blowout port 10 combining the linear part 40 and the circular arc part 42. FIG. Thereby, the ventilation resistance of the blowing wind which passes between the outermost left-right wind direction change blade | wing and the side wall of a blower outlet can be reduced as much as possible, and the wind direction change performance to the left-right direction of an indoor unit can be improved.

Description

AIR CONDITIONER

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for providing an indoor unit with a wind direction change vane for changing the direction of air blown out from a blowout port, and controlling the wind direction change vane to perform air conditioning operation. It is about the shape of.

It is common that both side walls of the air outlet provided in the indoor unit of the conventional air conditioner are formed in parallel with each other, but the outermost wing of the inclined left and right wind direction changing blades is gradually widened toward the downstream side of the air outlet. There exists a thing which kept the space | interval of and a side wall constant, and the blowout wind flows smoothly along a side wall (for example, refer FIG. 4 of patent document 1).

In addition, both sides of the blowout port are formed to have an arc shape spreading toward the downstream side, and the blowing wind is attached to the wall surface (Coanda effect) so that the air volume is changed to a wide angle with almost no decrease in the amount of air. One is also proposed (for example, refer patent document 2).

Japanese Unexamined Patent Publication No. 1998-103704 Japanese Patent Publication No. 1991-53529

However, in the side wall shape shown in FIG. 4 of patent document 1, although blowing air flows smoothly along the left and right side walls, since the downstream end of the side wall and the front surface of the indoor unit main body form an obtuse angle, The blowing wind flowing along is taken out in the extending direction of the side wall. Therefore, the Coanda effect cannot be expected, and the change performance to the left-right direction of an indoor unit cannot be said to be good.

In addition, in what was described in patent document 2, when the left-right wind direction change blade which changes the direction of the air blown out from a blower outlet to the left and right is curved outward, and employs a flat wing as a left-right wind direction change wing | blade, an arc-shaped side wall And the ventilation path between the outermost left and right wind direction changing blades is locally narrowed, thereby increasing the ventilation resistance.

Furthermore, since the arc-shaped side wall and the front surface of the indoor unit main body are connected at an obtuse angle, sufficient Coanda effect cannot be expected, and there is still room for improvement in terms of the performance of changing the wind direction in the left and right directions of the indoor unit.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and reduces the ventilation resistance of the blowing wind passing between the outermost left and right wind direction changing blades and the side wall of the blowout outlet as much as possible, and improves the wind direction changing performance in the left and right directions of the indoor unit. It aims at providing the air conditioner which can be improved.

In order to achieve the above object, the present invention provides a fan, a blowout port, and a wind direction changing blade for changing the direction of air blown out of the blowout port by the fan in an indoor unit, and controlling the air direction changing blade to air conditioner. An air conditioner that executes operation, wherein the wind direction changing blade has a vertical wind direction changing blade for changing the direction of air blown out from the blowout port up and down, and the blade in a state in which the vertical wind direction changing blade is the most downward. In the cross section along the surface, the shape of the side wall when the left and right side walls of the blowout port are viewed from the front is a shape that spreads outward toward the blowout port by combining a straight portion and an arc portion, and the fan is downstream of the fan. A first straight portion that is substantially orthogonal to the central axis of rotation of the first straight portion, and is connected to the first straight portion downstream of the first straight portion, A second straight portion having a first circular arc portion formed so as to spread to the second side, and downstream of the second straight portion, connected to the second straight portion and downstream of the second straight portion; It has a 2nd circular arc part formed so that it may be connected with the linear part of the front surface of the main body of the said indoor unit, The radius of curvature of the said 2nd circular arc part is larger than the radius of curvature of the 1st circular arc part.

The air conditioner which concerns on this invention combines the shape of the side wall at the time of seeing the left and right side wall of the blowout opening from the front in the cross section along the wing surface in the state which made the top-down wind direction change wing the most downward, and a linear part and an arc part. In this way, the airflow resistance of the blowing wind passing between the outermost left and right wind direction changing blade and the side wall of the air outlet is reduced to the maximum, and the wind direction changing performance in the left and right directions of the indoor unit can be improved. .

These aspects and features of the present invention will become apparent from the following description relating to the preferred embodiments of the accompanying drawings.
1 is a longitudinal sectional view in the depth direction of an indoor unit constituting an air conditioner according to the present invention;
2 is a schematic view of the indoor unit of FIG. 1;
3 is a cross-sectional view along the line III-III of FIG.
4 is a cross-sectional view taken along the line IV-IV of FIG. 2;
5 is a cross-sectional view taken along the line III-III of FIG. 2 in the case where both side walls of the outlet are expanded toward the downstream side;
6 is a cross-sectional view taken along the line IV-IV of FIG. 2 in the case where both side walls of the outlet are expanded toward the downstream side;
7 is an enlarged view of the upper and lower blades when the air conditioner is stopped;
8 is a schematic diagram of an indoor unit in operation of an air conditioner;
9 is a schematic diagram of an indoor unit when the air conditioner is stopped;
10 is a cross-sectional view taken along the line VIII-VIII in FIG. 8;
FIG. 11 is a cross sectional view along line XI-XI of FIG. 9;
12 is a graph showing the left and right change performance of the left and right wings,
13 is another graph showing the left and right wing changing performance of the left and right wings,
14 is an enlarged view of left and right side walls combining a plurality of straight portions and a plurality of arc shapes;
15 is a front view of the indoor unit having the side wall of FIG. 14;
16 is a front view of the indoor unit when the side wall is formed in one arc shape;
Fig. 17 is a front view of the indoor unit when the side wall is formed in one straight shape.

The present invention provides an air conditioner for providing an indoor unit with a fan, a blowout port, and a wind direction changing blade for changing the direction of air blown out of the blowout port by the fan, and controlling the wind direction changing blade to perform air conditioning operation. In the cross section along the wing surface in the state which has the up-down wind direction change blade which changes the direction of the air blown out from the said blower opening up and down, and makes the said up-down wind direction change blade the most downward, The shape of the side wall when the left and right side walls of the blowout port are seen from the front is a shape which spreads outward toward the blowout port by combining a straight portion and an arc, and is substantially orthogonal to the rotational central axis of the fan downstream of the fan. And a first circular arc formed so as to be connected to the first straight portion and spread outward on a downstream side of the first straight portion. And a second straight portion spreading outward toward the ejection opening and a second circular arc portion formed downstream of the second straight portion and connected to the second straight portion and spread outward on the downstream side thereof; The second circular arc portion is connected to a straight portion on the front surface of the main body of the indoor unit, and the radius of curvature of the second circular arc portion is larger than the radius of curvature of the first circular arc portion.

Thus, in the cross section along the blade surface in the state which made the up-down wind direction change wing | wing downward the most, the shape of the side wall when the left and right side walls of the blowout opening are seen from the front is combined toward a blowout opening by combining a linear part and a circular arc part. Since the shape spreads in the direction, the ventilation resistance of the blowing wind passing between the outermost left and right wind direction changing blades and the side wall of the blowout port is reduced to the maximum, and the change performance in the left and right directions of the indoor unit can be improved.

In addition, the ventilation path between the outermost left and right wind direction changing blades and the side wall does not locally narrow, and the ventilation resistance is reduced, and at the same time, when the blowing air is blown out from the blowout port into the open space (indoor space), the front of the main body from the side wall The blowing wind is blown out to the right and left right side without peeling from the wall surface until it reaches the left and right ends of, so that the Coanda effect is improved.

Further, the wind blown forward from the fan is guided in the direction along the second straight portion spreading outward, so that the flow between the left and right wind direction changing blades and the second straight portion becomes smoother.

Although the flow blown out from the blower outlet into the open space is easy to peel off from the side wall, the curvature radius of the second arc portion is set larger than the radius of curvature of the first arc portion, thereby reducing the peeling of blow-out wind from the side wall as much as possible to enhance the Coanda effect. Can be.

(Embodiments)

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by such embodiment.

An air conditioner used in a general home is usually composed of an outdoor unit and an indoor unit connected to each other by a refrigerant pipe, and FIG. 1 illustrates an indoor unit of an air conditioner according to the present invention.

The indoor unit has a main body 2 and a movable front panel (hereinafter, simply referred to as a “front panel”) 4 that can open and close the front opening portion 2a of the main body 2, and at the time of stopping the air conditioner, While the panel 4 is in close contact with the main body 2 and closes the front opening 2a, during operation of the air conditioner, the front panel 4 moves in a direction that is separated from the main body 2. To open the front opening 2a. 1 shows a state in which the front panel 4 closes the front opening 2a.

Moreover, inside the main body 2, the fan 8 for heat-exchanging the indoor air taken in from the heat exchanger 6, the front opening part 2a, and the upper surface opening part 2b with the heat exchanger 6, and taking it out into the room | chamber interior. ), Up and down wind direction change blades (hereinafter referred to simply as "up and down wings") 12 to open and close the blowout port 10 for blowing out the heat-exchanged air into the room, and to change the air blowing direction up and down, It is provided with the left-right wind direction change blade | wing (henceforth only a "left-right wing") 14 which changes a blow-out direction to left and right, and is between the front opening part 2a, the upper surface opening part 2b, and the heat exchanger 6, The filter 16 for removing the dust contained in the indoor air received from the front opening part 2a and the upper surface opening part 2b is provided.

The upper and lower vanes 12 are provided above the lower vanes 18 and the lower vanes 18 to open and close the ejection openings 10, and cooperate with the lower vanes 18 to blow out air from the ejection openings 10. Consists of the upper blade 20 to control the. Further, the lower blade 18 is connected to the drive shaft 22, while the upper blade 20 is connected to the drive shaft 24, and each drive shaft 22, 24 is connected to a drive source (not shown) such as a drive motor. It is connected.

10 and 11, the left and right wings 14 are composed of a set of wings 14a positioned on the left side and a set of wings 14b positioned on the right side when viewed from the front of the indoor unit. The pair of wings 14a or 14b is composed of a plurality of wings (for example, four pieces). In addition, each set of vanes 14a and 14b is connected to a separate drive source (for example, a drive motor) 26, and is independently controlled by the drive source 26.

When the air conditioner starts to operate, the upper and lower vanes 12 are controlled to be opened to open the outlet 10, and the fan 8 is driven so that the indoor air passes through the front opening 2a and the upper opening 2b. Is accepted into the. The received indoor air performs heat exchange with the heat exchanger 6, passes through the fan 8, and passes through the ventilation path 28 formed on the downstream side of the fan 8 and is blown out of the air outlet 10.

In addition, the blowing direction of the air from the blowout port 10 is controlled by the up-and-down blade | wing 12 and the left-right blade 14, and the angle of the up-down direction of the up-and-down blade 12, and the left-right direction of the left-right blade 14 are shown. Is controlled by a remote control (remote control device) that controls the indoor unit.

Moreover, the ventilation path 28 located upstream of the outlet 10 has a rear guider 30 which is a rear wall of the ventilation path 28 located downstream of the fan 8 and the downstream of the fan. It is formed with a stabilizer 32 which is located at the side and is a front wall of the ventilation path 28 facing the rear guider 30, and both side walls 34 of the main body 2 (see Fig. 3).

In addition, the term "stabilizer" mentioned above is located in the downstream vicinity of the fan 8, the stabilizer which stabilizes the eddy which arises in the vicinity of the front part of the fan 8, and is located in the downstream of this stabilizer, Although divided into the front wall part of the diffuser which is responsible for the pressure recovery of the air conveyed by these, in this specification, these are collectively called "stabilizer."

In addition, although the front panel 4 was demonstrated as a movable type, it may be a fixed type.

<Shape of Up and Down Wings 12>

Here, the shape of the up-and-down wing | blade 12 is demonstrated in detail.

FIG. 2 shows a schematic view of the indoor unit shown in FIG. 1, FIG. 3 is a sectional view along the line III-III of FIG. 2, and FIG. 4 is a sectional view along the line IV-IV of FIG. 2.

FIG. 3 is a view of the upper wing 20 viewed from the front of the indoor unit when the lower wing 18 opens the outlet 10. When the air conditioner is stopped, the upper wing 20 is viewed from the front and is approximately T-shaped. The shape of is shown.

That is, the width | variety of the upper blade | wing 20 is not constant, The narrow part 20a connected to the drive shaft 24 and located between the both side walls 34 of the main body 2 (outlet 10), and air-conditioning It is provided with the wide part 20b which is located above the narrow part 20a at the time of a stop, and covers the main body 2 above the ejection opening 10. As shown in FIG. The width (length in the left and right directions) of the narrow portion 20a is set slightly shorter than the width of the outlet 10, and the width of the wide portion 20b is set longer than the width of the outlet 10.

Similarly, the width | variety of the lower blade 18 is also not constant, The narrow part 18a connected to the drive shaft 22, and located between the both side walls 34 of the main body 2 (outlet 10), and air conditioning The wide part 18b which covers the ejection opening 10 at the time of a stop is provided. The width (length in the left and right directions) of the narrow portion 18a is set slightly shorter than the width of the outlet 10, and the width of the wide portion 18b is set longer than the width of the outlet 10.

1 and 3, the shape is set so as to cover all the ejection openings 10 by the lower blades 18 at the time of stopping the air conditioner, but it is not necessary to cover all the ejection openings 10. The shape may be set to cover a part of 10).

Here, the lower wing 18 in the state which covered the blower outlet 10 with the lower blade | wing 18 at the time of air conditioner stop, and covered the main body 2 above the blower outlet 10 with the upper blade | wing 20. And the front surface of the upper blade 20 are defined as the "design surface", the lower blade 18 and the upper blade projecting forward than the design surface in the state where the upper and lower blades 12 are opened during the operation of the air conditioner. The width | variety of the part (wide part 18b, 20b) of (20) becomes larger than the width | variety of the part (narrow part 18a, 20a) inside of a design surface.

By setting in this way, the blowing wind is interposed between the upper and lower blades 12 (lower blade 18 and upper blade | wing 20) and the side walls 34 of right and left inside the blower outlet 10, and it leaks to upper and lower sides It is changed without a change, and it is taken out from the blowout outlet 10, and on the outside of the blowout outlet 10, even if blowout wind changed left and right is blown out to the left and right more than the left and right edge part of the blowout outlet 10, The up-down and left-right changing directions can be maintained, without spreading by the up-and-down wing | blade 12 extended outside the side wall 34. As shown in FIG.

The longer the width of the upper and lower blades 12 is larger, the larger the width of the upper and lower blades 12 is. The width of the wide portions 18b and 20b is approximately equal to the width of the main body 2 in consideration of the design of the indoor unit. It is preferable to set.

In particular, during heating, the air warmed inside the indoor unit intends to rise upward from the outlet 10, but this movement is controlled by the upper blade 20, and further, by expanding the width of the upper blade 20, Leakage above the warmth is prevented.

3 and 4 illustrate a case in which the left and right sidewalls 34 of the ejection opening 10 to which the drive shafts 22 and 24 of the upper and lower blades 12 are mounted are substantially parallel to each other, FIGS. 5 and 6. As shown in FIG. 9, when the diffuser is formed such that the left and right sidewalls 34 of the blowout outlet 10 are linearly or curvedly extended toward the downstream side, the diffuser of the sidewall 34 and the upper and lower blades ( The width of the narrow part 18a of the lower blade | wing 18 and the narrow part 20a of the upper blade | wing 20 gradually becomes long toward a downstream so that the clearance gap between the left and right edge parts of 12) may not spread toward a downstream side. Shape is set to

By setting the shape in this way, when the blowout wind changed left and right by the left and right blades 14 is blown from side to side along the diffuser of the side wall 34, upward or downward from the gap between the upper and lower blades 12 and the side wall 34. Leakage can be reduced, and the change performance of up, down, left and right can be improved.

In addition, as shown in FIG. 1, when the air conditioner is stopped, the lower wing 18 and the upper wing 20 are arranged so that a part of the depth direction of the lower wing 18 and the upper wing 20 overlaps each other. By increasing the length in the depth direction, the change performance of the upper side and the lower side can be improved.

FIG. 7 is an enlarged view of the upper and lower blades 12 at the time of stopping the air conditioner, and as shown in FIG. 7, on the outer surface of the narrow portion 20a of the upper blade 20, the opposite portions of the lower blades 18 are shown. The recessed part 20c of the shape of (tip part) and complementary shape is formed, and when the air conditioner stops, the opposing part of the lower wing | tip 18 is arrange | positioned close to the recessed part 20c of the upper wing 20, The stepped portion is eliminated (the surface of the design is flat), and the appearance of the indoor unit at the time of stopping the air conditioner is improved.

<Shape of Left and Right Wings 14>

Fig. 8 shows a schematic diagram of the indoor unit when the air conditioner is in operation, and Fig. 9 shows a schematic diagram of the indoor unit when the air conditioner is stopped. 10 is a cross sectional view taken along the line VII-VII of FIG. 8, and FIG. 11 is a cross sectional view taken along the line XI-XI of FIG. 9.

As shown in FIG. 8, the left and right wing 14 has a length in the longitudinal direction longer than that of the stabilizer 32, and includes a ventilation path interposed between the rear guider 30 and the stabilizer 32 ( The blowing wind passing through 28 is changed by the left and right wings 14 without exception.

In more detail, in the cross section of FIG. 8, when viewed from the flow of air flowing through the ventilation path 28, the downstream edge of the stabilizer 32 is called A, and the upstream edge is A ', and the downstream side is A'. If the distance from the leading edge portion A to the upstream edge A 'is L, the line passing through the leading edge portion B when the left and right blades 14 face the front and parallel to the stabilizer 32 is formed. The length of the left and right wings 14 that follow (hereinafter, simply referred to as "the length of the left and right wings 14") is set longer than the length L of the rear guider 30, as shown in FIGS. 8 and 10. Similarly, the tip portion B of the left and right wings 14 protrudes forward from the design surface.

That is, as shown in FIG. 1 or FIG. 8, the edge part on the side of the swinging point (drive shaft 24) of the upper blade | wing 20 is arrange | positioned near the downstream edge part A of the stabilizer 32, and The edge of the lower wing 18 on the swinging point (drive shaft 22) side is disposed close to the downstream edge C of the rear guider 30, and the two upper and lower wings 12 (upper wing ( 20 and the lower blade 18 are opened, the rear guider 30 and the stabilizer 32 are inserted by inserting the end portion of the downstream side of the left and right blades 14 into the upstream edge of the upstream side. The blowing wind passing through the ventilation path 28 interposed therebetween can be passed between the two upper and lower blades 12 without fail, and can be changed downward while maintaining the left and right changing state of the blowing wind.

12 and 13 show the left and right changing performance of the left and right blades 14, and means the ratio of the left and right changing angles of the blown wind to the changing angle of the left and right blades 14.

As shown in the graph of FIG. 12, when the lengths of the left and right wings 14 are L / 3 and L / 2, the left and right changing performances are 30% and 50%, respectively, and the length of the left and right wings 14 is L days. At this time, the left and right changing performance is 90%, and it can be seen that it is preferable to set the length of the left and right blades 14 to be longer than the length L of the rear guider 30. In addition, L 'shown in the graph of FIG. 12 has shown the length of the left-right wing | blade 14 extended upstream from the upstream edge A' of the stabilizer 32 (refer FIG. 8), and the graph of FIG. Even if the left and right wings 14 are extended upstream from the upstream edge A 'of the stabilizer 32, the left and right change performances are not improved.

In addition, in the cross section of FIG. 8, when the air flows through the ventilation path 28, the edge of the downstream side of the rear guider 30 is called C, and the horizontal axis of the graph of FIG. Of the ventilation path 28 along the wing surface of the left and right wings 14 surrounded by a straight line passing through A and C and a straight line parallel to a straight line passing through A 'and passing through A and C when the light is directed to the front. When the ratio of the area of the left and right wings 14 to the area (hereinafter, simply referred to as the "area rate of the left and right wings 14") is shown, and the area rates of the left and right wings 14 are 20% and 30%, Left and right change performance is 30% and 50%, respectively, when the area ratio of left and right wings 14 is 70%, left and right change performance is 90%, making the area ratio of left and right wings 14 larger than 70%. It can be seen that setting is preferable.

In this embodiment, in determining the shape of the left and right wing 14, length of the left and right wing 14 in the depth direction is made as long as possible, and the surrounding members (rear guider 30, stabilizer 32, etc.) The minimum clearance of the left and right blades 14 is set to be larger than 70% by securing a minimum clearance so as not to interfere with.

In addition, the left and right wings 14, when the front end portion (B) protrudes forward than the design surface when facing the front, and, when the air conditioner stops operating, closing the upper and lower wings 12 in the same state, the upper and lower wings 12 interferes with the left and right wings 14.

Here, in the present invention, at the time of stopping the operation of the air conditioner, as shown in FIG. 11, one set of the left wing 14a of the left and right wing 14 is inclined to the left and the right ( 1) After tilting the pair of wings 14b to the right (after tilting the tip ends of the two sets of wings 14a and 14b), the upper and lower wings are controlled by closing the outlet 10 with the upper and lower wings 12. Interference between the 12 and the left and right wings 14 is avoided.

That is, at the time of operation of the air conditioner, in the state where the upper and lower blades 12 are opened, the left and right wings 14 that are long in the flow direction in the ventilation path 28 do not interfere with the upper and lower blades 12, but the left and right sides of the blowing wind are left and right. Not only can the change be executed freely, but also the performance of changing the left and right wind direction can be improved, and when the air conditioner is stopped, the blower outlet 10 is closed by the upper and lower wings 12 after the left and right wings 14 are inclined. By controlling so that the left and right blade | wing 14 can be accommodated in the main body 2, it is possible.

In the above embodiment, at the time of stopping the air conditioner, the pair of wings 14a on the left side are inclined to the left side, and the pair of wings 14b on the right side are inclined to the right side. 14a, 14b) may be inclined in the same direction.

In addition, the left and right blades 14 may be configured of a plurality of blades simultaneously controlled instead of two sets of wings 14a and 14b that are independently controlled.

<Sidewall shape of the outlet 10>

The "sidewall shape of the blowout outlet 10" used here means a blowout outlet (a cross section substantially perpendicular to the design surface) along the surface of the lower wing 18 in a state where the lower wing 18 is in the most downward direction. The shape when the left and right side walls 34 of 10) are viewed from the front, which means the shape of the left and right side walls 34 in the cross section along the line IV-IV of FIG. 2, and is a cross section parallel to the cross section. Indicates the same shape.

The left and right side walls 34 have a cross-sectional shape that spreads outward toward the outlet 10 in the ventilation path 28, and the cross-sectional shape thereof faces the outlet 10 as shown in FIG. 14. The plurality of straight portions 36 and 40 and the plurality of arc shapes 38 and 42 are combined.

In more detail with reference to FIG. 14, each of the left and right sidewalls 34 is a straight portion 36 which is formed just downstream of the fan 8 and is substantially orthogonal to the central axis of rotation of the fan 8. 1 straight portion), an arc portion 38 (first arc portion) formed downstream of the straight portion 36 so as to spread outward and connected to the straight portion 36, and an arc portion 38 so as to spread outward. And a straight portion 40 (first straight portion) formed on the downstream side and connected to the circular arc portion 38, and formed on the downstream side of the straight portion 40 so as to spread outward and connected to the straight portion 40. It has an arc part 42 (second arc part) which becomes, and the arc part 42 is connected with the linear part 46 of the lower part of the front surface of the main body 2. As shown in FIG.

As shown in FIG. 16, when the side wall 34 which opposes the substantially flat left and right wing 14 into one arc shape is formed, the ventilation path between the side wall 34 and the outermost left and right wing 14 ( A constriction 44 is formed locally at 28a, and the width of the ventilation path 28a gradually narrows from the upstream side toward the constriction 44, and gradually widens from the constriction 44 toward the downstream side, whereby the ventilation resistance is increased. Gets bigger

On the other hand, the shape of FIG. 14 and FIG. 15 shows that when the wind blown out from the fan 8 passes through the closed space between the left and right wings 14 inclined from side to side and the straight part 40 of the side wall 34. Since the ventilation path 28a between the left and right wings 14 and the side walls 34 does not narrow locally, the ventilation resistance of the blown-out wind changed left and right between the left and right wings 14 and the side walls 34 can be reduced. Can be.

In addition, as shown in FIG. 17, when the side wall 34 facing the left and right wings 14 is formed in one straight shape, when the blowout air is blown out from the blowout port 10 into the open space, The so-called wind blows off from the wall surface, and the so-called "Coanda effect", in which the direction of flow changes along the object, cannot be expected.

On the other hand, in the case of the shape of FIG. 14 and FIG. 15, when blowout wind is blown out from the blowout port 10 on the downstream side of the straight part 40 to the open space, the left and right of the front surface of the main body 2 from the side wall 34 Since the blowout wind is blown out to the right and left side immediately without peeling from the wall surface to the edge part, the airflow along the left and right wall edge direction can be generated, and the Coanda effect can be improved.

Therefore, the blow-out wind flowing through the left and right side walls 34 does not weaken the flow in the ventilation path 28a, and furthermore, even after being taken out from the blowout port 10, the blow-out wind is left and right while maintaining the intensity of the flow. It is changed more greatly and is taken out.

In addition, as shown in FIG. 14, by providing the arc part 38 which spreads outward to the upstream of the straight part 40, the straight line of the side wall 34 which the wind blown forward from the fan 8 spreads outward is spread out. Guided in the direction along the portion 40, the flow between the left and right wing 14 and the straight portion 40 of the side wall 34 is more smooth, and the end of the circular arc portion 42 on the downstream side is (2) By setting the shape so as to substantially contact the straight portion 46 on the front surface, the flow of blown air flows more along the front surface of the main body 2.

In addition, the term "approximately contact" here means that the distance from the center of curvature of the arc part 42 to the straight part 46 is equal to the radius of curvature of the arc part 42, or the radius of curvature of the arc part 42. It's a bit smaller than that.

In addition, although the flow taken out from the outlet 10 into the open space is easy to peel off from the side wall 34, the radius of curvature (for example, R45) of the downstream arc part 42 (for example, R45) is the upstream arc part 38. When the curvature radius is set to be larger than the radius of curvature (for example, R10), the Coanda effect is improved, and the flow drawn out from the blowout port 10 into the open space becomes difficult to peel off from the sidewall 34.

Moreover, when the left and right wing 14 is inclined most, the ventilation path 28a between the left and right wing 14 and the straight part 40 is shaped so as to become somewhat narrow toward the downstream side, and narrows toward the downstream side. The accelerated blow-out flow is attached to the arc part 42 and the straight part 46 by the Coanda effect, and flows further along the main body 2 front surface.

Moreover, by combining suitably arbitrary embodiments among the said various embodiments, the effect which each has can be made to be exhibited.

While the present invention has been described in connection with the preferred embodiments with reference to the accompanying drawings, various modifications and changes are apparent to those skilled in the art. Such modifications and variations are to be understood as included within the scope of the invention as defined by the appended claims.

The disclosure of the specification, drawings and claims of Japanese Patent Application No. 2010-267358 filed on November 30, 2010 is incorporated herein by reference in its entirety.

(Industrial availability)

The air conditioner according to the present invention can reduce the ventilation resistance of the blowing wind passing between the outermost left and right wind direction changing blades and the side wall of the blowout outlet as much as possible, and can improve the changing performance in the left and right directions of the indoor unit. It is useful as various air conditioners including the air conditioners used.

Claims (1)

In the indoor unit, the air conditioner which provides a fan, a blower outlet, and the wind direction change blade which changes the direction of the air blown out from the blower outlet by the said fan, and controls the wind direction change blade to perform air-conditioning operation,
The wind direction changing blade has a vertical wind direction changing blade for changing the direction of the air blown out from the blower outlet up and down, and in the cross section along the wing surface in the state where the vertical wind direction changing blade is in the most downward direction, the left and right of the blowout port The shape of the side wall when the side wall is seen from the front is made into the shape which spreads outward toward the said ejection opening combining a linear part and an arc part,
A first linear portion on the downstream side of the fan that is substantially orthogonal to the rotational central axis of the fan, and a first circular arc portion formed on the downstream side of the first linear portion to be connected to the first linear portion and spread outward; And a second circular arc portion formed downstream of the second linear portion, connected to the second linear portion, and formed to spread outward on the downstream side thereof; A circular arc portion is connected to a straight portion on the front surface of the main body of the indoor unit, and the radius of curvature of the second circular arc portion is made larger than the radius of curvature of the first circular arc portion.
Air conditioner.

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