JPH1019301A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a substantial reduction of air blowing sound when an indoor device is operated by a method wherein an arrangement of each of composing elements is changed in such a way that the air blowing sound of a cross-flow fan may not be radiated directly from an air blowing port and concurrently this air blowing sound is effectively absorbed. SOLUTION: This device has, within a casing 2, a cross-flow fan 7 arranged at a downstream side of an air flow from a heat exchanger 6, and an air flow guiding section 8 for guiding air flow sucked through a suction port 8a to an air outlet port 5. The air flow guiding section 8 is provided with an arcuate portion bulged out with a larger radius of curvature than an outer circumference of the cross-flow fan 7, and then the suction port 8a communicated with the air outlet port is formed at an upstream end of the arcuate portion. A sound absorbing wall 21 for absorbing air blowing sound generated when the cross-flow fan 7 is operated is arranged at an upstream side of the air flow opposing against the suction port 8a of the flow guiding section 8. The sound absorbing wall 21 comprises a rear surface 2a and a partition wall 19 which are continuous to form an arcuate shape at an opposing position facing against the suction port 8a, and a sound absorbing member 22 adhered to an entire inner region ranging from the rear surface to the partition wall.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner provided with a cross flow fan as a blowing means,
The present invention relates to measures for reducing the blowing noise of the cross flow fan.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Publication No. 7-5201
As disclosed in Japanese Unexamined Patent Application Publication No. 6-62, there is known an indoor unit of an air conditioner that blows air with a cross flow fan. As shown in FIG. 5, this type of indoor unit has an air inlet (b) at a portion extending from the center to the upper end of the front surface of the casing (a), and an air outlet at a lower end portion of the front surface of the casing (a).
(c) is provided for each. And the casing
(a) has a heat exchanger (d) facing the air suction port (b).
However, cross-flow fans (e) are arranged at the back of the heat exchanger (d) (downstream in the air flow direction). Further, an air flow guide (f) is provided between the cross flow fan (e) and the air outlet (c). This air flow guide
(f) is an annular arc-shaped portion (h) bulging in an arc along the crossflow fan (e) with a larger radius of curvature than the outer periphery of the crossflow fan (e), and an arc-shaped portion (8c). A suction port (g) formed at the upstream end and communicating with the air outlet (c) .The air flow sucked from the suction port (g) by the operation of the cross flow fan (e) is supplied to the air outlet (c). ) To guide you straight.

[0003] The indoor air introduced into the casing (a) from the air suction port (b) with the driving of the cross flow fan (e) flows between the refrigerant flowing through the refrigerant pipe of the heat exchanger (d). After adjusting the temperature by performing heat exchange, the air is sucked into the air flow guide section (f) from the cross flow fan (e), and blown out as air-conditioned air from the air outlet (c) toward the room. . In this case, the air flow guide (f) is
(h) is located on the back side of the casing (a), and the suction port (g) is arranged so as to open toward the air suction port (b) at the upper front of the casing (a). By the operation of the flow fan (e), air is efficiently sucked over a wide area from almost the entire area of the substantially semi-arc-shaped exposed portion that is exposed downstream from the suction port (g) in the air flow direction of the heat exchanger (d). It has become.

[0004]

However, in the above-mentioned conventional indoor unit, the air inlet (g) of the air flow guide (f) opens toward the air inlet (b) at the upper front of the casing (a). In other words, since the air suction port (b) is open at a position facing the suction port (g) upstream of the suction port (g) in the air flow direction, the air suction port (b) is generated due to the operation of the cross flow fan (e). The blowing sound is radiated directly from the air inlet (b) to the outside of the casing (a), and the blowing sound of the cross flow fan (e) makes the room noisy.

[0005] The present invention has been made in view of such a point, and an object of the present invention is to change the arrangement of each component so that the blowing sound of the cross flow fan is not directly radiated from the air outlet, and to achieve the above object. It is an object of the present invention to significantly reduce the blowing sound when the indoor unit is operated by effectively absorbing the blowing sound.

[0006]

In order to achieve the above-mentioned object, a solution taken by the invention according to claim 1 includes a rear surface (2a).
Is provided on the installation surface (Z), and the casing (2)
Air inlets (3,4,11) to be sucked into
(2), an air outlet (5) for blowing temperature-controlled air into the room, and the air inlets (3, 4, 11) and an air outlet
(5) and a heat exchanger (6) disposed so as to correspond to the air inlets (3, 4, 11).
A cross-flow fan (7) disposed downstream of the heat exchanger (6) in the air flow, and a cross-flow fan (7) having a larger radius of curvature than the outer periphery of the cross-flow fan (7). It has a circular arc-shaped portion (8c) bulging in an arc shape, and a suction port (8a) communicating with the air outlet (5) is formed at the upstream end of the arc-shaped portion (8c). ), And an air flow guide (8) for guiding the air flow sucked by the operation of the cross flow fan (7) straight to the air outlet (5), and the air suction ports (3, 4, After adjusting the temperature of the air introduced into the casing (2) from 11) in the heat exchanger (6),
It is assumed that the air conditioner sucks air from the cross flow fan (7) into the air flow guide (8) and blows out from the air outlet (5). A configuration in which a sound-absorbing wall (21) that absorbs blowing air generated by the operation of the cross-flow fan (7) is provided on the upstream side of the airflow opposite to the suction port (8a) of the airflow guide (8). It is what it was.

[0007] The solution taken by the invention of claim 2 is as follows.
The sound absorbing wall according to the first aspect of the present invention is specified. Specifically, a sound absorbing wall (21) is constituted by a casing wall (2a, 19) facing the suction port (8a) and a sound absorbing material (22) provided inside the casing wall (2a, 19). It was done.

[0008] The solution means taken by the invention of claim 3 is:
The sound absorbing wall according to the first aspect of the present invention is specified. More specifically, the casing wall (2a, 19 ′) opposed to the suction port (8a) forms a sound absorbing wall (21), and the casing wall (2a, 1 ′).
9 ') is made of a sound absorbing material.

According to the present invention, the heat is introduced into the casing (2) from the air suction ports (3, 4, 11) with the driving of the cross flow fan (7). The conditioned air whose temperature has been adjusted by heat exchange with the exchanger (6) is sucked into the air flow guide (8) through the suction port (8a), and is then larger than the outside circumference of the cross flow fan (7). It is guided along an arc-shaped portion (8c) bulging in an arc along the cross flow fan (7) with a radius of curvature, and is blown into the room from an air outlet (5).

[0010] In this case, the blowing noise generated by the operation of the cross flow fan (7) is generated by the air inlet (8) of the air flow guide (8).
On the upstream side of the air flow opposite to a), the suction port (8a)
Casing wall (2a, 19) and the sound absorbing material (22) inside it, or the casing wall (2a, 19) facing the suction port (8a).
19 ') The sound is absorbed directly by the sound absorbing wall (21) that uses the sound absorbing material itself, and the cross-flow fan goes out of the casing (2).
The radiation of the blowing sound of (7) is effectively suppressed, and the blowing sound when the cross flow fan (7) operates (when the air conditioner (1) operates) is greatly reduced.

In particular, according to the second aspect of the present invention, the suction port (8
It is only necessary to attach the sound absorbing material (22) to the inner surface (19a) of the casing wall (2a, 19) opposite to (a), and it is easily diverted to existing air conditioners. According to the third aspect of the present invention, the casing wall (2a, 1a) facing the suction port (8a).
9 ') itself becomes a sound absorbing material, so that the work of assembling the air conditioner (1) (indoor unit) can be performed easily compared to a case where a separate sound absorbing material is provided.

The solution taken by the invention according to claim 4 is as follows:
The sound-absorbing material (2a, 19 ', 2) of the invention according to claim 2 or 3.
2) is specified, and the sound absorbing material (2a, 19 ', 22) is made of synthetic resin.

According to the fourth aspect of the present invention, the air conditioner is provided with the sound absorbing material (2a, 19 ', 22) made of synthetic resin.
(1) The weight of the (indoor unit) is reduced.

[0014] The solution means taken by the invention according to claim 5 is as follows.
A sound absorbing wall (21) according to any one of claims 2 to 4 is specified. Specifically, the air flow guide (8) is positioned so that the arc-shaped portion (8c) is located closer to the front surface (2b) of the casing (2) than the center of rotation (o) of the cross flow fan (7). And the suction port (8a) is opened toward the rear surface (2a) of the casing (2). And
The sound absorbing wall (21) is constituted by a casing wall constituting the back surface (2a) of the casing (2).

According to the fifth aspect of the present invention, it is not necessary to separately provide a casing wall, and the rear surface (2a) of the casing (2) is also used as the sound absorbing wall (21).

According to a sixth aspect of the present invention, a sound absorbing wall (21) is provided in addition to the constituent features of the first aspect of the present invention. The casing wall (2e, 2f) other than the casing wall (2a, 19, 19 ') is air-flowed so that air can be introduced into the casing (2) upstream of the heat exchanger (6). Suction port
(11) is provided.

According to the sixth aspect of the present invention, air is effectively sucked from the casing constituting walls (2e, 2f) from which the blowing sound of the cross flow fan (7) is not directly radiated, and the cross flow fan (7) 7) The intake resistance of the intake air is reduced while suppressing the blowing noise.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 illustrates a case where the present invention is applied to an indoor unit of an air conditioner.

FIG. 1 is a sectional view showing the internal structure of the indoor unit according to this embodiment. This indoor unit (1) has a casing (2)
The rear surface (2a) of the camera is mounted on a vertical wall (Z). The indoor unit (1) is
A front side air inlet (3) is provided from the center to the upper end of the front surface (2b), and an upper surface side air inlet (4) is provided on the upper surface (2c) of the casing (2). In addition, the casing
An air outlet (5) is provided at the front end of the lower surface (2d) of (2). As a result, an air passage extending from the air inlet (3, 4) to the air outlet (5) is provided inside the casing (2).
(A) is formed.

In the casing (2), each air inlet (3,
A heat exchanger (6) is arranged corresponding to (4).
The heat exchanger (6) comprises a first heat exchanger (6a) which is arranged upright facing the lower end of the front air inlet (3), and an upper end of the front air inlet (3) and There are provided second and third heat exchangers (6b, 6c) which are arranged opposite to the upper surface side air inlet (4) in inclined directions different from each other so as to form an inverted V shape in side view. The second and third heat exchangers (6b, 6c) are connected at their upper ends, that is, at the rear end of the second heat exchanger (6b) and the front end of the third heat exchanger (6c). Meanwhile, the front end (lower end) of the second heat exchanger (6b) is connected to the upper end of the first heat exchanger (6a).

A cross flow fan (7) is arranged downstream of the heat exchanger (6) in the air flow direction. The cross flow fan (7) includes a rotation axis (G) (shown in FIG. 3) extending in a horizontal axis direction (a direction perpendicular to the paper surface of FIG. 1).
A plurality of blades (7b, 7b,...) Extending in the horizontal direction are disposed between a plurality of ring-shaped plates (7a, 7a,...) Arranged at predetermined intervals in the direction of the rotation axis (G). ) Are installed in a state of being arranged in an annular shape. As shown in FIG. 3, one end of the rotating shaft (G) of the cross flow fan (7) is connected to one side of the casing (2) (the right side in FIG. 3) of the fan motor (M). It is connected to the output shaft (Ma) so as to rotate integrally.

Further, on the downstream side of the heat exchanger (6) in the air flow direction, there is provided a suction port (8a) communicating with the air outlet (5), and a cross flow fan is provided from the suction port (8a). An annular air flow guide (8) for guiding the air flow sucked by the operation of (7) straight to the air outlet (5) is provided. The air flow guide portion (8) has a front side straight portion (8b) extending straight and straight toward the air outlet (5) on the front side (2b) side on the downstream side in the air flow direction. In addition, an annular arc-shaped portion (8c) protruding in an arc shape from the upper end (upstream end) of the front side straight portion (8b) toward the outer periphery of the cross flow fan (7) is provided on the upstream side. This arc-shaped portion (8c) is the rotation axis (G) of the cross flow fan (7).
It is arranged on the front surface (2b) side of the casing (2) with respect to the center (o) of the rotating shaft (described later), and has a larger radius of curvature than the cross flow fan (7) and has an arc shape along the cross flow fan (7). And is formed integrally with the front side straight portion (8b). In addition, the air flow guide (8) is
On the back side (2a) side, which is the (8c) side, there is a back side straight portion (8d) that extends substantially straightly toward the air outlet (5), and the back side straight portion (8d) A projection (8e) protrudes from the upper end toward the back surface (2a) along a substantially tangential direction of the cross flow fan (7). Air flow guide
(8) is arranged such that the arc-shaped portion (8c) is located on the upper side and the projection (8e) is located on the lower side, and the upstream end of the projection (8e) and the arc-shaped portion (8c) are arranged. The suction port (8a) is formed between the suction port (8a) and the upstream end. And cross flow fan
(7) drives the casing from the air suction port (3, 4).
(2) The conditioned air that has been introduced into the inside and temperature-adjusted by heat exchange with the heat exchanger (6) has an arc-shaped portion (8c) and a protrusion ( 8e), the air is smoothly sucked into the air flow guide section (8) through the suction port (8a) facing backward from the upstream end of the casing (2). Cross flow fan on the side
(7) Cross flow fan with a larger radius of curvature than the outer circumference
After flowing in an arc along the arc-shaped portion (8c) bulging in an arc along (7), it is converted into a linear flow between the two straight portions (8b, 8d), and then converted into a linear flow. It is guided straight downward to the air outlet (5) that opens on the 2d) side and is blown into the room.

Further, as shown in FIG. 2, the cross flow fan (7) is driven by the fan motor (M) to move from the upper side to the lower side in FIG. ) Side rotation, that is, counterclockwise rotation, so that the wind speed distribution of the air flow from the suction port (8a) to the air outlet (5) is increased on the arc-shaped part (8c) side. ing. As a result, the conditioned air is pressed between the wall surface (Z) by the high-speed conditioned air on the front surface (2b) side and is effectively guided downward along the wall surface (Z). Part of the warm air-conditioning air that blows out directly from the air outlet (5) is prevented from being immediately sucked into the air inlets (3, 4), suppressing the occurrence of short circuits, and the indoor unit (1)
Energy efficiency is improved.

The heat exchanger (6) includes first to third heat exchangers.
In addition to the heat exchangers (6a to 6c), the fourth to sixth heat exchangers (6a to 6c)
d to 6f). The fourth heat exchanger (6d) is arranged upright, and its upper end is the rear end (lower end) of the third heat exchanger (6c).
It is connected to. The fifth heat exchanger (6e) is disposed so as to be substantially tangential to the cross flow fan (7), and its upper end (rear end) is connected to the lower end of the fourth heat exchanger (6d). ing. The sixth heat exchanger (6f) is arranged substantially horizontally, and its rear end is connected to the lower end (front end) of the fifth heat exchanger (6e). These fourth to sixth heat exchangers (6d to 6f) are formed integrally with the first to third heat exchangers (6a to 6c). The lower end of the first heat exchanger (6a) is an air flow guide
Near the upper end of the straight part (8b) on the front side of (8), a sixth heat exchanger
The front end of (6f) is the straight part (8d) on the back side of the airflow guide (8).
The heat exchangers (6) (first to sixth heat exchangers (6a to 6f)) are connected around the cross flow fan (7) except for the air flow guide section (8). It is arranged to surround. In other words, each air inlet (3,4) is
(6) On the upstream side in the air flow direction,
Except for (8), the casing (2) is designed so that air is introduced into the casing (2) from all around the cross flow fan (7).
Open on the front surface (2b) and the upper surface (2c).

The rotation axis of the cross flow fan (7)
The center (o) of (G) is located above the center (n) of the casing (2). This allows the cross flow fan
The heat exchanger (6) is arranged so as to surround the periphery of (7), the casing (2) is made closer to a square shape in side view, and the heat exchanger (6) is efficiently placed inside the casing (2). The casing (2) is housed compactly, and the dimension of the casing (2) in the vertical direction can be reduced.

Further, as shown in FIG.
A pipe housing space (14) having a substantially rectangular cross section is provided at a position closer to the lower surface side inside the casing (2) below the air flow guide section (8) and below the air flow guide section (8). ing. In the pipe accommodation space (14), there are a refrigerant pipe (12, 12) for circulation of the refrigerant and a drain pipe (13) for discharging dew condensation water and the like generated in the heat exchanger (6). Each is protruded downward. At the protruding end (lower end) of the refrigerant pipe (12, 12), one end of a refrigerant connection pipe (17, 17) for circulating the refrigerant with an outdoor unit (not shown) is connected to a flare nut (N, N). ), And this refrigerant connection pipe (1
The refrigerant pipes (12, 12) are led out of the casing (2) (outside of the pipe housing space (14)) via the (7, 17). On the other hand, one end of a drain connection pipe (18), which connects the drain pipe (13) to the outside of the room so that dew condensation water can be discharged, is connected to the projecting end (lower end) of the drain pipe (13) by a flare nut (N). ), The drain pipe (13) is led out of the casing (2). In this case, the refrigerant connection pipes (17, 17) are put together before and after, and the drain connection pipe (18) is disposed on the front side of the pipe storage space (14), respectively.

This piping accommodating space (14) has a casing
It is covered from the outside by a cover (15) having a substantially U-shaped cross section that can be attached to and detached from (2). One side of the cover (15) (FIG. 1)
The refrigerant connection pipes (17, 17) and the drain connection pipe (18) are located outside the pipe housing space (14) (casing
(2) A lead-out hole (not shown) leading to the outside is formed.

As a characteristic part of the present invention, as shown in FIG. 1, a cross-flow fan (7) is provided on the upstream side of the air flow facing the suction port (8a) of the air flow guide (8). A sound-absorbing wall (21) is provided for absorbing the blowing noise generated by the operation. This sound-absorbing wall (21) has a casing (2) as a casing wall disposed at a position facing the suction port (8a).
And a partition wall (19) (casing wall) for partitioning the piping accommodating space (14) and the air passage (A) above the piping accommodating space (14). This back (2a)
The inner side and the inner surface (19a) of the partition wall (19) are integrally provided in an arc that is continuous in a direction facing the suction port (8a). The sound-absorbing wall (21), together with the rear surface (2a) of the casing (2) and the partition wall (19), extends from the inside of the rear surface (2a) to the inner surface (19a) of the partition wall (19). (2a) and a sound-absorbing material (22) made of synthetic resin adhered to the entire inner side of the partition wall (19) on the side of the suction port (8a).

Therefore, in the present embodiment, the blowing noise generated by the operation of the cross flow fan (7) is generated at the position facing the suction port (8a) at the casing (2).
The back (2a) and the partition wall (19), which are continuous in an arc so as to straddle the inner surface (19a) of the partition wall (19) from the inside of the rear surface (2a),
Sound is directly absorbed by the sound absorbing wall (21) composed of the sound absorbing material (22) adhered to the entire area inside the rear surface (2a) and the partition wall (19), and is directly absorbed by the front air inlet (3) and the upper surface. The radiation of the blowing sound of the cross flow fan (7) to the outside of the casing (2) through the air inlet (4) is effectively suppressed, and the cross flow fan (7) operates when the air conditioner (1 ) During operation, the blowing noise can be greatly reduced.

Moreover, the sound absorbing wall (21) utilizes the rear surface (2a) and the partition wall (19) of the existing casing (2), and the sound absorbing material (22) is adhered to the inside thereof. By forming the sound absorbing wall (21), the air inlet (8a) of the air flow guide (8)
It is necessary to provide a separate casing wall in the entire area facing the suction port (8a) on the upstream side in the air flow direction, and to form a sound absorbing wall by attaching a sound absorbing material to the inner surface of the casing wall. Therefore, the rear surface (2a) of the casing (2) and the partition wall (19) can be effectively used, and the number of parts can be suppressed, and the sound absorbing wall (21) can be formed at low cost.

The sound-absorbing wall (21) is constructed by adhering a sound-absorbing material (22) to the entire inner region extending from the back surface (2a) of the casing (2) to the partition wall (19). It can be easily diverted to existing air conditioners, and the versatility of the sound absorbing wall (21) can be increased.

It should be noted that the present invention is not limited to the above embodiment, but includes various other modifications. For example, in the present embodiment, the sound-absorbing wall (21) is configured by attaching the sound-absorbing material (22) to the entire area inside the rear surface (2a) of the casing (2) and the partition wall (19). As shown in a modified example shown in Fig. 1, the sound absorbing wall (21) is configured such that the back surface (2a ') and the partition wall (19') of the casing (2) are made of a sound absorbing material having a high noise absorbing effect, such as plastic. You may make it. In this case, since the rear surface (2a ') of the casing (2) and the partition wall (19') themselves are sound absorbing materials, the assembly of the indoor unit (1) is more complicated than the case where sound absorbing materials are separately attached. Work can be done easily. Further, by using a synthetic resin such as plastic as the sound absorbing material, the weight of the indoor unit (1) can be reduced.

Further, in the above embodiment, the casing
The front side air suction port (3) and the top side air suction port (4) are provided in (2). However, as shown by phantom lines (two-dot chain lines) in FIGS. On the left and right side surfaces (2e, 2f) as casing constituent walls other than the rear surface (2a ') and the partition wall (19, 19'), the casing (6 2) A side air inlet (11) (only the right side (2f) is shown in FIGS. 1 and 4) is provided inside so that air can be introduced from both left and right sides (2e, 2f). The side air inlet (11) may be arranged in the arrangement of the fourth to sixth heat exchangers (6d to 6f) on the upstream side of the fourth to sixth heat exchangers (6d to 6f). The notch is cut in a generally J-shape, so that air is effectively sucked in from the left and right side surfaces (2e, 2f) of the casing (2) from which the airflow from the suction port (8a) is not radiated. (7) It is possible to reduce the introduction resistance of the suction air while.

[0035]

As described above, according to the air conditioner of the first to third aspects of the present invention, the casing wall facing the suction port on the upstream side of the air flow facing the suction port of the air flow guide portion. And the sound absorbing material on the inner surface of the casing, or the sound absorbing wall that uses the casing wall itself facing the suction port as the sound absorbing material, directly absorbs the blowing sound when the cross flow fan is in operation, greatly reducing the blowing sound of the cross flow fan. Can be reduced.

In particular, according to the air conditioner according to the second aspect of the present invention, the sound absorbing material can be applied to an existing air conditioner by providing a sound absorbing material, and the versatility of the sound absorbing wall can be achieved. According to the air conditioner of the third aspect of the invention, the sound absorbing wall using the casing wall itself as the sound absorbing material can easily perform the assembling work of the air conditioner.

According to the air conditioner of the fourth aspect of the present invention, the weight of the air conditioner can be reduced by using the synthetic resin sound absorbing material.

According to the air conditioner of the invention described in claim 5, the casing wall is constituted by the rear surface of the casing, and the casing wall can be shared.

Further, according to the air conditioner of the present invention, air can be effectively sucked from the casing constituting wall which does not constitute the sound absorbing wall, and the blowing noise of the cross flow fan is suppressed. In addition, it is possible to reduce the introduction resistance of the suction air.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of an indoor unit according to an embodiment of the present invention.

FIG. 2 is a diagram showing streamlines of air flowing inside an indoor unit.

FIG. 3 is a front view of the indoor unit.

FIG. 4 is a diagram corresponding to FIG. 1 according to a modification of the embodiment.

FIG. 5 is a diagram corresponding to FIG. 1 according to a conventional example.

[Explanation of symbols]

(1) Indoor unit (air conditioner) (2) Casing (2a, 2a ') Rear (casing wall) (2e, 2f) Side (casing component wall) (3) Front air intake (air intake) ( 4) Top side air inlet (air inlet) (5) Air outlet (6) Heat exchanger (7) Cross flow fan (8) Air flow guide (8a) Suction port (8c) Arc-shaped part (11 ) Side air inlet (air inlet) (19,19 ') Partition wall (casing wall) (21) Sound absorbing wall (22) Sound absorbing material (A) Air passage (Z) Wall (o) Cross flow fan rotation Center of axis (center of rotation)

Claims (6)

[Claims] 1. A casing (2) having a rear surface (2a) attached to an installation surface (Z); and a casing (2) provided on the casing (2) to evacuate indoor air.
(2) an air suction port (3, 4, 11) to be sucked into the inside; an air blowout port (5) provided in the casing (2) for blowing temperature-controlled air into a room; and the air suction port (3). An air passage (A) provided between the air inlet (3, 4, 11) and the air outlet (5), and a heat exchanger ( 6), a cross flow fan (7) arranged downstream of the heat exchanger (6) in the air flow, and a cross flow fan (7) having a larger radius of curvature than the outer periphery of the cross flow fan (7). A circular arc-shaped portion (8c) bulging in an arc shape along the arc-shaped portion (8c), and an inlet (8a) communicating with the air outlet (5) is formed at an upstream end of the arc-shaped portion (8c). (8a) and an air flow guide (8) for guiding the air flow sucked by the operation of the cross flow fan (7) straight to the air outlet (5). 4,11) to casing (2) After adjusting the temperature of the introduced air in the heat exchanger (6), the air conditioner sucks the air into the air flow guide section (8) from the cross flow fan (7) and blows out from the air outlet (5). A sound-absorbing wall (21) that absorbs the blowing noise generated by the operation of the cross-flow fan (7) should be provided on the upstream side of the airflow facing the suction port (8a) of the flow guide section (8). An air conditioner characterized by the following. 2. The sound absorbing wall (21) includes a casing wall (2a, 19) facing the suction port (8a), and a casing wall (2a, 1).
The air conditioner according to claim 1, further comprising a sound absorbing material (22) provided inside of (9). 3. The sound absorbing wall (21) is constituted by a casing wall (2a, 19 ′) facing the suction port (8a), and the casing wall (2a, 19 ′) is made of a sound absorbing material. The air conditioner according to any one of the preceding claims. 4. The air conditioner according to claim 2, wherein the sound absorbing material (2a, 19 ′, 22) is made of a synthetic resin. 5. The air flow guide (8) is located on the front side of the casing (2) more than the center of rotation (o) of the cross flow fan (7).
(2b) side is arranged so that the arc-shaped portion (8c) is located, the suction port (8a) is open toward the back (2a) side of the casing (2), the sound absorbing wall (21) The air conditioner according to any one of claims 2 to 4, comprising a casing wall forming a back surface (2a) of the casing (2). 6. The casing wall (2e, 2f) other than the casing wall (2a, 19, 19 ') constituting the sound absorbing wall (21) is upstream of the heat exchanger (6) in air flow. The wall-mounted air conditioner according to any one of claims 1 to 5, wherein an air suction port (11) is provided on a side of the casing so that air is introduced into the casing (2).