JPH11218345A - Outdoor machine of air conditioning equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a short circuit of let-out air in regard to an outdoor machine of air conditioning equipment which has an air inlet in the front of a casing and air outlets on the lateral sides and the top side of the casing. SOLUTION: This outdoor machine has an air inlet in the front of a casing 2 and air outlets 4, 5 and 6 on the upper side and the right and left sides of the casing 2. A heat exchanger 10 and a mixed flow fan 11 are housed in the casing 2. By a drive of the mixed flow fan 11, air is let out downward obliquely from one of the air outlets 5 and 6 on the lateral sides and upward obliquely from the other. The position of the lower end of the opening of the air outlet 5 letting out the air downward obliquely is set above the position of the lower end of the opening of the other air outlet 6 and on the side above the position of the lower end of the opening 12a of a fan guide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an outdoor unit of an air conditioner. In particular, the present invention relates to an improvement in an apparatus having an air inlet on the front surface of a casing and an air outlet on a side surface of the casing.

[0002]

2. Description of the Related Art Conventionally, for example, an outdoor unit of an air conditioner disclosed in JP-A-55-35839 is known. As shown in FIG. 8, the outdoor unit disclosed in this publication has an air inlet (b) on the front surface of an outdoor unit casing (a), and air outlets on the left and right side surfaces and the upper surface.
(c, d). The casing (a) houses a heat exchanger (e) and a blower (f) such as a mixed flow fan. By driving the blower (f), the air sucked from the air suction port (b) exchanges heat with the refrigerant in the heat exchanger (e), and then blows out from the air outlets (c, d).

[0003] This type of outdoor unit does not have an opening for air circulation on the back surface of the casing (a), so that the rear surface can be located near the wall surface (w) of the building. The degree of freedom can be improved.

[0004]

However, in such an outdoor unit, the air blown out from the air outlets (c, d) on the side and upper surfaces goes around the front side of the casing (a) and the air is sucked. Flows into the casing (a) from the mouth (b),
A so-called short circuit was likely to occur (see the arrow in FIG. 8). In other words, in a general outdoor unit having an air inlet on the front surface of the casing and an air outlet on the rear surface of the casing, if the air blown out from the air outlet does not reverse by 180 °, the air will not flow to the front side of the casing. There was almost no short circuit because it did not go around. However, with the air outlets (c, d) provided on the side and upper surfaces, the air blown out from the air outlets (c, d) is turned around by 90 °, so that there is a possibility that the air goes around the casing front side. , Short circuit was easy to occur. When such a short circuit occurs, the amount of heat exchange between the air and the refrigerant in the heat exchanger is reduced, and the performance of the air conditioner is reduced.

The present invention has been made in view of this point, and an object of the present invention is to provide an outdoor air conditioner having an air inlet on the front surface of a casing and an air outlet on the side and upper surfaces of the casing. The purpose of the present invention is to suppress the short circuit of blown air to the machine.

[0006]

In order to achieve the above-mentioned object, a first solution taken by the present invention is that each of the air outlets on the side surface of the casing has an air outlet depending on the direction of rotation of a blower (for example, a mixed flow fan). Are slightly different from each other in view of the fact that the blowing direction greatly affects the occurrence of a short circuit.
In other words, depending on the direction of rotation of the blower,
While air is blown obliquely upward, air is blown diagonally downward at the other outlet. The inventors have found that the air blowing obliquely downward is particularly likely to cause a short circuit, and have taken this point into consideration. It is considered that the air that is blown diagonally downward is affected by the floor surface as a factor that easily causes the short circuit.

Specifically, as shown in FIGS. 1 and 2,
A heat exchanger (10) and a blower (11) are housed in the casing (2), an air inlet (3) is formed on the front of the casing, and air outlets (5, 6) are formed on the left and right side surfaces of the casing. By driving the blower (11), the air sucked into the casing (2) from the air suction port (3) passes through the heat exchanger (10), and then blows out from each air outlet (5, 6). It assumes an outdoor unit of an air conditioner. Further, according to the rotation direction of the blower (11), air is blown obliquely upward at one of the air outlets (6) of the air outlets (5, 6) on the side surfaces of each casing, and the other air outlet ( In 5), air is blown obliquely downward. Then, the height position of the lower end of the opening of the air outlet (5) on the side where air is blown obliquely downward is set at a position higher than the height position of the lower end of the opening of the other air outlet (6). You have set.

[0008] Due to this particular matter, in the air outlet (5) on the side where air is blown obliquely downward, the air blown from the lower end of the opening tends to cause a short circuit. In the present solution, by setting the height position of the lower end edge of the opening of the air outlet (5) to be high, an airflow that easily causes a short circuit is prevented from being generated.

According to a second aspect of the present invention, in the first aspect, the air sucked from the air inlet (3) is guided to the blower (11) on the suction side of the blower (11), and the blower (11 )
A fan guide (12) having an opening (12a) surrounding the periphery of the fan guide (12). In addition, the height position of the lower edge of the opening of the air outlet (5) on the side where air is blown diagonally downward is determined by the fan guide (12).
The opening (12a) is set at a position higher than the lower end position.

[0010] Due to these particulars, the fan guide (12) is used as an air flow which is particularly likely to cause a short circuit.
Air blown from a position lower than the lower end position of the opening. In this solution, the short circuit is suppressed by not generating this airflow.

A third solution is to provide a means for directing an air flow obliquely upward to an air outlet from which air is blown obliquely downward. Specifically, as shown in FIG. 5, an air outlet (5) on the side through which air flowing obliquely downward passes is provided with an upward blowing guide (20) for directing the passing airflow obliquely upward. I have.

A fourth solution is to provide the upward blowing guide (20) in a minimum necessary area. Specifically, in the third solution, the upward blowing guide (20) is provided only at the lower portion of the air outlet (5) on the side through which the air obliquely downward passes.

According to these specific items, the occurrence of a short circuit can be suppressed without reducing the opening area of the air outlet (5).

According to a fifth solution, an air outlet is not provided on the side surface from which air is blown obliquely downward. Specifically, the air outlet on the side of the casing
(6) is configured to be provided only on the side surface on the side where air is blown obliquely upward according to the rotation direction of the blower (11).

According to this specific matter, all of the air blown out from the side surface of the casing is blown obliquely upward, so that a short circuit hardly occurs.

The sixth solution uses the Coanda effect to adjust the airflow of the air blown out of the air outlet so that the blown air does not flow around the air inlet. Specifically, a guide member (25) that blows out the blown air substantially parallel to the rear surface of the casing by the Coanda effect at an opening edge located on the back side of the casing (2) among the opening edges of the air outlets (5, 6). ) Is provided.

According to this particular matter, the air blown out from the air outlets (5, 6) is blown substantially parallel to the rear surface of the casing. That is, it is possible to make it difficult for the air blown out from the upper surface of the casing or the side surface of the casing to flow toward the front surface of the casing.

According to a seventh aspect of the present invention, in the first to fifth aspects, the air outlet (4) is also provided on the upper surface of the casing (2).
Is provided.

According to this specific matter, the total area of the openings of the air outlets can be increased, and a sufficient amount of air flow in the casing (2) can be secured.

[0020]

Embodiment 1 Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing the internal structure of the outdoor unit (1) of the air conditioner according to the present embodiment. FIG. 2 is a side view showing the internal structure of the outdoor unit (1).

-Explanation of Overall Configuration of Outdoor Unit- As shown in these figures, the outdoor unit (1) comprises a casing (2).
Is provided with an air inlet (3) on the front side. Further, air outlets (4, 5, 6) are provided on the upper surface and left and right side surfaces of the casing (2). In other words, this air outlet is the upper outlet (4),
It consists of a right outlet (5) and a left outlet (6). Also,
A grill (not shown) is attached to the air inlet (3) and each of the air outlets (4, 5, 6).

A heat exchanger (10) is provided in the casing (2).
And a mixed flow fan (11) as a blower.
The heat exchanger (10) is arranged to face the air inlet (3),
Heat exchange is performed between the outside air flowing from the air suction port (3) and the refrigerant. The mixed flow fan (11) is arranged on the secondary side (downstream in the air flow direction) of the heat exchanger (10), and the airflow from the air inlet (3) to each of the air outlets (4, 5, 6). Generate. The mixed flow fan (11) includes a fan motor (11a) fixed to the back of the casing (2) and a plurality of blades (11b, 11b,...) Attached to a drive shaft of the fan motor (11a). ). Further, the heat exchanger (10) includes the heat exchanger (1).
A fan guide (also called a bell mouth) (12) for guiding the air passing through 0) to the mixed flow fan (11) is attached. The upstream end of the fan guide (12) in the air flow direction is connected to the outer edge of the heat exchanger (10), and is inclined toward the center toward the downstream side, and has a diameter substantially equal to the outer diameter of the mixed flow fan (11). It has a matching opening (12a).

Incidentally, (15) in FIG. 1 is a compressor provided in a refrigerant circuit formed between an indoor unit (not shown). That is, by driving the compressor (15), the refrigerant circulates through the refrigerant circuit, and heat is transferred between the outdoor unit (1) and the indoor unit to cool or heat the room. Reference numeral (16) in the drawing denotes a blowout guide provided at the opening edge of the upper outlet (4).

-Description of Side Outlets- A feature of this embodiment is the opening shape of each of the left and right side outlets (5, 6). Before explaining this opening shape, each air outlet (4,5,
The air blowing direction in 6) will be described. Mixed flow fan
(11) rotates clockwise in FIG. Therefore, the flow of air from the mixed flow fan (11) toward each air outlet (4, 5, 6) also has a swirling speed component parallel to the tangential direction of the outer periphery of the mixed flow fan (11). . That is, as indicated by the arrow in FIG. 1, air is blown obliquely to the upper right in FIG. 1 at the upper outlet (4), and air is blown diagonally to the lower right in FIG. 1 at the right outlet (5). , And the left outlet (6)
In this case, air is blown obliquely to the upper left of FIG.

The feature of this embodiment is that the lower end of the opening of each of the side outlets (5, 6) is located. The lower end of the opening of the left outlet (6) through which air is blown diagonally to the upper left is set at a relatively low position. This position is a position where the opening area is set to be relatively large so that the wind velocity of the air passing through the left outlet (6) becomes equal to or lower than a predetermined value. By reducing the passing wind speed, the air passing sound (wind noise) at the outlet (6) is reduced.

On the other hand, the lower end of the opening of the right outlet (5) from which air is blown obliquely downward and to the right is located at the lower outlet of the left outlet.
It is set at a position higher than the lower end position of the opening (6) (position A in FIG. 1). Specifically, the lower end of the opening is set to be slightly above the lower end of the opening (12a) of the fan guide (12). This is to prevent a short circuit in which the air blown obliquely downward and rightward from the right outlet (5) flows into the casing (2) again from the air inlet (3). That is, when the lower end position of the opening of the right outlet (5) is set to a relatively low position similarly to the lower end position of the opening of the left outlet (6),
The air (see the arrow indicated by the broken line in FIG. 1) blown from the lower part of the opening of the right outlet (5) may be short-circuited due to the influence of the floor surface or the like. In particular, the tendency was remarkable in air blown from below the lower end of the opening (12a) of the fan guide (12). In order to suppress this, the lower end position of the opening of the right outlet (5) is set at a relatively high position, thereby preventing the generation of the air current that easily causes the short circuit.

-Effects of Embodiment- By setting the lower end position of the right outlet (5) at a relatively high position as described above, the short circuit among the air blown out from the right outlet (5) is set. Those that are likely to be removed can be removed, thereby suppressing a decrease in the performance of the air conditioner.

[0028]

Modification of First Embodiment of the Invention (Modification 1) Hereinafter, a first modification of the first embodiment of the present invention will be described with reference to the drawings. The outdoor unit (1) according to the present embodiment is different from the above-described first embodiment in the rotation direction of the mixed flow fan (11) and the installation mode of the compressor (15). Therefore, only the differences from the first embodiment will be described here.

FIG. 3 is a front view showing the internal structure of the outdoor unit (1) of the air conditioner according to the present modification, and FIG. 4 is a side view showing the internal structure of the outdoor unit (1). . As shown in these figures, the compressor (15) installed in the casing (2) of the outdoor unit (1) is of a horizontal type. This compressor (15) is installed below the mixed flow fan (11). For this reason, the casing (2) of the present example can have a smaller width dimension (dimension in the left-right direction in FIG. 3) than that of the first embodiment described above, so that the installation space can be reduced.

Further, the mixed flow fan (11) of the outdoor unit (1) of the present embodiment.
Rotates counterclockwise in FIG. Therefore, the direction of air flow from the mixed flow fan (11) toward each air outlet (4, 5, 6) is oblique in FIG. Air is blown out to the upper left,
In addition, air is blown obliquely to the upper right in FIG. 3 from the right outlet (5), and air is blown diagonally to the lower left in FIG. 3 from the left outlet (6).

In the present embodiment, the lower end of the opening of the left outlet (6) from which air is blown diagonally to the lower left is set to a position higher than the lower end of the opening of the right outlet (5). . Specifically, the lower end position of the opening is the fan guide (1
It is set so as to be located slightly above the lower end of the opening (12a) of 2). Note that, when the fan (11) rotates clockwise, the left and right sides have opposite structures.

According to this configuration, similarly to Embodiment 1 described above, the short circuit in which the diagonally downward left air blown out from the left air outlet (6) flows into the casing again from the air inlet (3). Can be prevented. Therefore, also in the configuration of the present example, it is possible to suppress a decrease in the performance of the air conditioner by suppressing the short circuit.

(Modification 2) Hereinafter, Embodiment 1 of the present invention will be described.
Modification 2 will be described with reference to the drawings. The outdoor unit according to the present example is obtained by improving the configuration of the lower end portion of the side opening (5) that blows air obliquely downward. Other configurations are the same as those of the first embodiment. Therefore, here, only the configuration of the lower end of the side opening (5) will be described.

As shown in FIG. 5, in this example, the lower end of the opening of the right outlet (5) that blows out the air obliquely downward coincides with the lower end of the opening of the left outlet (6). That is,
Also in the right outlet (5), the opening lower end position is set at a relatively low position, and the opening area is relatively large so that the passing wind speed of the air passing through the right outlet (5) becomes equal to or less than a predetermined value. You have set.

A plurality of guide plates as upward blow guides for guiding the direction of the blown air obliquely upward are provided at the lower end of the opening of the right blow outlet (5).
(20, 20,...) Are provided. This guide plate (20,20,…)
Is set such that the uppermost guide plate (20) is located above the lower end of the opening (12a) of the fan guide (12). As a result, the air blown out from the lower end portion of the right outlet (5) flows obliquely upward and to the right (see the arrow in FIG. 5), and the air flows from the air inlet (3) into the casing again. The short circuit flowing into the vehicle is prevented. Therefore, also in this example, by suppressing the short circuit, it is possible to suppress a decrease in the performance of the air conditioner.

The guide plates (20, 20,...) May be provided not only at the lower end of the opening of the right outlet (5) but also over the entire outlet (5).

[0037]

Embodiment 2 Hereinafter, Embodiment 2 of the present invention will be described. The outdoor unit of this embodiment has a configuration in which an air outlet is opened on only one of the left and right side surfaces, and the air outlet is not opened on the other side surface. That is, in FIG. 1, an opening is not formed on the right side surface of the casing (2), and an air outlet is formed only on the left side surface (side surface on the side that blows air obliquely upward).

Accordingly, there is no air blown obliquely downward from the side surface of the casing, so that the occurrence of a short circuit is suppressed.

[0039]

Third Embodiment Hereinafter, a third embodiment of the present invention will be described with reference to the drawings. This form is a side outlet (5,6)
The short circuit is suppressed by adjusting the airflow at the edge on the rear side of the casing among the opening edges. In other words, as shown in FIG.
A vortex is generated at the edge of the opening edge of (c, d) on the rear side of the casing (see the arrow B in FIG. 8), and due to this effect, the other airflow becomes a flow toward the front side of the casing. (See arrow C in FIG. 8). That is, since the vortex exists around the wall surface, the blown air cannot flow along the wall surface (w), but flows to the front side of the casing (a), and a short circuit is easily generated. In addition, the vortex caused dirt to adhere to the wall surface (w).

In this embodiment, as shown in FIG. 6, among the opening edges of the side air outlets (5, 6), the blowing guide (25, 25). The air flowing near the blow guide (25, 25) via the fan guide (12) and the mixed flow fan (11) increases the speed by reducing or expanding the passage area, and then decelerates the air to reduce the speed of the blow guide (25, 2).
The generation of the vortex is suppressed by the Coanda effect acting by flowing along 5) and having the swirling speed of the fan (11). The air blown out from the side outlets (5, 6) flows along the wall surface (W) due to the Coanda effect, and the air flows into the casing.
Flowing into the front side of (2) is suppressed.

Specifically, the blowing guide (25) shown in FIG.
The air blown from the mixed flow fan (11) is blown into the side outlets (5,
A guide surface (25a) composed of a curved surface is provided for guiding in 6). Although not shown, a similar outlet guide (25) is provided in the upper outlet (4).

As a modification of the present embodiment, the outlet guide (25, 25) shown in FIG. 7 is a member having a substantially arc-shaped cross section attached to the opening edge of the side outlet (5, 6). .

With such a configuration, the blowing guide (25, 2
5) guides the air flow by the Coanda effect, thereby suppressing the generation of the vortex, avoiding the short circuit, and suppressing the deterioration of the performance of the air conditioner. In addition, by suppressing the eddy current near the wall surface, it is possible to avoid adhesion of dirt on the wall surface (w).

In each of the embodiments described above, the outdoor unit (1) having the mixed flow fan (11) as the blower has been described. However, the present invention is also applicable to a unit having a propeller fan.

[0045]

As described above, according to the present invention, the following effects are exhibited. According to the first aspect of the present invention, the air inlet (3) is provided on the front surface of the casing (2), and the casing (2)
The height of the lower edge of the opening of the air outlet (5) on the side from which air is blown obliquely downward, relative to the outdoor unit (1) of the air conditioner, which has air outlets (5, 6) on the sides of The position was set higher than the height position of the lower edge of the opening of the other air outlet (6). For this reason, conventionally, in the air outlet (5) on the side where air is blown obliquely downward, in particular, the air blown from the lower end of the opening tends to cause a short circuit, but this air outlet (5) By setting the height position of the lower edge of the opening to be high, it is possible to prevent an air current that is likely to cause a short circuit from being generated. As a result, the amount of heat exchange between the air and the refrigerant in the heat exchanger (10) can be maintained large, and a decrease in the capacity of the air conditioner can be avoided.

According to the second aspect of the present invention, the height position of the lower end of the opening of the air outlet (5) on the side where air is blown obliquely downward is determined by the lower end position of the opening (12a) of the fan guide (12). Higher than the position. For this reason, the fan guide (12)
The air blown from a position lower than the lower end of the opening can be cited, but according to the configuration of the present invention, the short circuit can be surely suppressed by not generating this airflow. Such an effect can be obtained reliably.

According to the third aspect of the present invention, a means for directing the air flow obliquely upward is provided for the air outlet from which the air is blown obliquely downward. For this reason, the occurrence of a short circuit can be suppressed without reducing the opening area of the air outlet (5). As a result, the capability of the air conditioner can be maintained at a high level by the synergistic effect of the prevention of the short circuit and the increase in the amount of air flow in the casing.

According to the fourth aspect of the present invention, the upward blowing guide (20) is provided in a minimum necessary area,
Improvements in the configuration of the outdoor unit (1) can be minimized, and the practicability can be improved.

According to the fifth aspect of the present invention, the air outlet is not provided on the side surface on which the air is blown obliquely downward. For this reason, all of the air blown out from the casing side surface is blown diagonally upward, and the airflow blown diagonally downward, which has caused a short circuit, can be eliminated.

According to the sixth aspect of the present invention, the air flow of the air blown out from the air outlet is adjusted by utilizing the Coanda effect so that the blown air does not flow around the air suction side. Also in this case, similarly to the above, the occurrence of a short circuit can be suppressed, and a decrease in the performance of the air conditioner can be avoided.

According to the seventh aspect of the present invention, the casing is
An air outlet (4) is also provided on the upper surface of (2). Thus, the total area of the opening of the air outlet can be increased, the amount of air flowing through the casing (2) can be sufficiently secured, and the capacity of the air conditioner can be increased.

[Brief description of the drawings]

FIG. 1 is a front view showing an internal structure of an outdoor unit according to a first embodiment.

FIG. 2 is a side view showing the internal structure of the outdoor unit according to the first embodiment.

FIG. 3 is a diagram corresponding to FIG. 1 according to a first modification of the first embodiment.

FIG. 4 is a diagram corresponding to FIG. 2 according to a first modification of the first embodiment;

FIG. 5 is a diagram corresponding to FIG. 1 according to a second modification of the first embodiment.

FIG. 6 is a plan view showing the internal structure of the outdoor unit according to Embodiment 2.

FIG. 7 is a plan view showing an internal structure of an outdoor unit according to a modification of the second embodiment.

FIG. 8 is a plan view showing the internal structure of a conventional outdoor unit.

[Explanation of symbols]

 (1) Outdoor unit (2) Casing (3) Air inlet (5,6) Outlet (10) Heat exchanger (11) Mixed flow fan (blower) (12) Fan guide (12a) Opening (20) Guide Board (upward blowing guide) (25) Blowing guide (guide member)

Claims (7)

[Claims] A heat exchanger (10) and a blower (11) are housed in a casing (2), and an air inlet (3) is provided in the front of the casing.
However, air outlets (5, 6) are formed on the left and right casing sides, respectively, and the air inlets are driven by the blower (11).
The air drawn into the casing (2) from (3) is transferred to the heat exchanger (1).
After passing through the air outlets (5, 6), in the outdoor unit of the air conditioner that blows out from the air outlets (5, 6), depending on the rotation direction of the blower (11), the air outlets (5, 6) on the side of each casing One of the air outlets (6) blows air obliquely upward, and the other air outlet (5) blows air diagonally downward, so that air is blown diagonally downward. Side above air outlet (5)
An outdoor unit of an air conditioner, characterized in that the height position of the lower end edge of the opening is set higher than the height position of the lower end edge of the opening of the other air outlet (6). 2. The outdoor unit for an air conditioner according to claim 1, wherein the air sucked from the air suction port (3) is guided to the blower (11) on the suction side of the blower (11), and the blower ( A fan guide (12) having an opening (12a) surrounding the periphery of 11) is provided, and the height position of the lower end edge of the opening of the air outlet (5) on the side where air is blown obliquely downward is as described above. Open the fan guide (12) (1
An outdoor unit for an air conditioner, wherein the outdoor unit is set at a position higher than the lower end position of 2a). A heat exchanger (10) and a blower (11) are housed in a casing (2), and an air inlet (3) is provided in the front of the casing.
However, air outlets (5, 6) are formed on the left and right casing sides, respectively, and the air inlets are driven by the blower (11).
The air drawn into the casing (2) from (3) is transferred to the heat exchanger (1).
After passing through the air outlets (5, 6), in the outdoor unit of the air conditioner that blows out from the air outlets (5, 6), depending on the rotation direction of the blower (11), the air outlets (5, 6) on the side of each casing One of the air outlets (6) passes diagonally upward air, and the other air vent (5) passes diagonally downward air. The above air outlet on the side
(5) The outdoor unit of the air conditioner, wherein an upward blowing guide (20) for directing an air flow of the passing air obliquely upward is provided. 4. The outdoor unit for an air conditioner according to claim 3, wherein the upward blowing guide (20) is provided only at a lower portion of the air outlet (5) on the side through which air obliquely downward passes. An outdoor unit of an air conditioner, comprising: 5. A heat exchanger (10) and a blower (11) are housed in a casing (2), and an air inlet (3) is provided in the front of the casing.
However, an air outlet (6) is formed on the side of the casing, and the air sucked into the casing (2) from the air inlet (3) passes through the heat exchanger (10) by driving the blower (11). After that, in the outdoor unit of the air conditioner that blows out from the air outlet (6), the air is blown obliquely upward from the air outlet (6) on the side of the casing according to the rotation direction of the blower (11). An outdoor unit of an air conditioner, wherein the outdoor unit is provided only on the side surface of the side. 6. A heat exchanger (10) and a blower (11) are housed in a casing (2), and an air suction port (3) is provided in the front of the casing.
However, an air outlet (5, 6) is formed on at least one of the casing upper surface and the casing side surface, and the air blower (11) is driven to drive the casing (2) from the air inlet (3).
In the outdoor unit of the air conditioner, which blows the air sucked into the heat exchanger (10) and then blows out the air from the air outlets (5, 6), An outdoor unit of an air conditioner, wherein a guide member (25) is provided at an opening edge located on the back side of the casing (2) to blow out the blown air substantially parallel to the back of the casing by a Coanda effect. . 7. The outdoor unit of an air conditioner according to claim 1, wherein an air outlet (4) is also provided on an upper surface of the casing (2). .