JP2005049092A - Outdoor unit for air conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the short circuit of blown air to an outdoor unit of an air conditioning system having an air suction port on the front surface of a casing and air outlet ports on the side surfaces and upper surface of the casing. <P>SOLUTION: This outdoor unit comprises the air suction port on the front surface of the casing 2, and the air outlet ports 4, 5 and 6 on the upper surface and lateral side surfaces of the casing 2. A heat exchanger 10 and a mixed flow fan 11 are housed in the casing 2. Air is blown obliquely downward from one of the air outlet ports 5 and 6 of the side surfaces and obliquely upward from the other. The opening lower end position of the air outlet port 5 for blowing the air obliquely downward is set above the opening lower end position of the other air outlet port 6 and also above the lower end position of the opening 12a of a fan guide. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

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

  Conventionally, what is indicated by patent documents 1 as an outdoor unit of an air harmony device is known, for example. As shown in FIG. 8, the outdoor unit disclosed in this publication has an air inlet (b) on the front surface of the outdoor unit casing (a), and air outlets (c, d) on the left and right side surfaces and the upper surface. Each has. The casing (a) contains 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) is heat-exchanged with the refrigerant in the heat exchanger (e), and then blown out from each air outlet (c, d).

This type of outdoor unit is not provided with an air circulation opening on the back side of the casing (a), so that the back side can be positioned near the wall surface (w) of the building, and the degree of freedom of the outdoor unit installation position Can be improved.
JP 55-35839 A

  However, in such an outdoor unit, the air blown out from the air outlets (c, d) on the side surface and the upper surface circulates to the front side of the casing (a), and then passes through the air inlet (b) to the casing (a). A so-called short circuit that easily flows into the circuit is likely to occur (see arrows in FIG. 8). That is, 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, the air blown out from the air outlet is not reversed by 180 ° unless the air blown from the air outlet is reversed by 180 °. There was almost no short circuit because it did not wrap around. However, in the case where the air outlet (c, d) is provided on the side or upper surface, there is a possibility that the air blown out from the air outlet (c, d) may turn around the front side of the casing by reversing 90 °. The 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 decreases, leading to a decrease in the performance of the air conditioner.

  The present invention has been made in view of this point, and an object of the present invention is to an outdoor unit of an air conditioner provided with an air suction port on the front surface of the casing and an air outlet on the side surface or upper surface of the casing. It is to suppress the short circuit of blown air.

  In order to achieve the above object, the first solution provided by the present invention is that the air blowing direction slightly differs depending on the rotation direction of the blower (for example, a mixed flow fan) at each air outlet on the side of the casing. This was made in view of the fact that this blowing direction has a great influence on the occurrence of a short circuit. That is, depending on the rotation direction of the blower, air is blown obliquely upward at one of the air outlets, while air is blown obliquely downward at the other air outlet. Then, it is found that the air blown obliquely downward tends to cause a short circuit, and this point is taken into consideration. It is considered that the air blown obliquely downward is influenced by the floor as a factor that this short circuit is likely to occur.

  Specifically, as shown in FIG. 1 and FIG. 2, the heat exchanger (10) and the blower (11) are accommodated in the casing (2), and the air suction port (3) is provided on the front side of the casing. Air outlets (5, 6) are formed on the sides of the casing, respectively, 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, the outdoor unit of the air conditioner that blows out from each air outlet (5, 6) is assumed. Further, depending on the rotation direction of the blower (11), air is blown obliquely upward at one of the air outlets (5, 6) on the side surface of each casing (6), and the other air outlet ( In 5), air is blown obliquely downward. And the height position of the opening lower end edge of the air outlet (5) on the side where the air is blown obliquely downward is higher than the height position of the lower end edge of the other air outlet (6). It is set.

  Due to this specific matter, in particular, the air blown from the lower end of the opening tends to cause a short circuit at the air outlet (5) on the side where the air is blown obliquely downward. In the present solution, the height position of the opening lower end edge of the air outlet (5) is set high so as not to generate an air flow that is likely to cause a short circuit.

  The second solution means that in the first solution means, the air sucked from the air suction port (3) is guided to the blower (11) on the suction side of the blower (11), and around the blower (11). A fan guide (12) having an opening (12a) surrounding the fan is provided. Further, the height position of the opening lower end edge of the air outlet (5) on the side where the air is blown obliquely downward is set higher than the lower end position of the opening (12a) of the fan guide (12). .

  As a result of this particular matter, an air flow that is particularly likely to cause a short circuit includes air blown from a position lower than the opening lower end position of the fan guide (12). In this solution, the short circuit is suppressed by not generating this airflow.

  The third solution means is provided with means for directing the airflow obliquely upward with respect to the air outlet from which air is blown obliquely downward. Specifically, as shown in FIG. 5, an upward blowing guide (20) for directing the passing airflow obliquely upward is provided at the air outlet (5) on the side through which the air traveling obliquely downward passes. Yes.

  In the fourth solution, the upward blowing guide (20) is provided in the minimum necessary area. Specifically, in the third solving means, the upward blowing guide (20) is provided only at the lower part of the air outlet (5) on the side through which the air traveling obliquely downward passes.

  These specific matters can suppress the occurrence of a short circuit without reducing the opening area of the air outlet (5).

  In the fifth solution, an air outlet is not provided on the side surface on the side where air is blown obliquely downward. Specifically, the air outlet (6) on the side surface of the casing is configured to be provided only on the side surface on the side from which air is blown obliquely upward in accordance with the rotational direction of the blower (11).

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

  The sixth solving means adjusts the airflow of the air blown out from the air outlet using the Coanda effect so that the blown out air does not enter the air inlet side. Specifically, a guide member (25) that blows the blown air substantially parallel to the casing back surface by the Coanda effect on the opening edge located on the back side of the casing (2) among the opening edges of the air outlets (5, 6). ).

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

  The seventh solving means is the above-described first to fifth solving means in which an air outlet (4) is also provided on the upper surface of the casing (2).

  By this specific matter, the sum total of the opening area of the air outlet can be increased, and a sufficient amount of air flow in the casing (2) can be secured.

  As described above, according to the present invention, the following effects are exhibited. According to the first aspect of the present invention, the outdoor unit (1) of the air conditioner is provided with an air inlet (3) on the front surface of the casing (2) and an air outlet (5, 6) on the side surface of the casing (2). ), The height position of the lower opening edge of the air outlet (5) on the side where air is blown obliquely downward is higher than the height position of the lower opening edge of the other air outlet (6). Set to. For this reason, conventionally, in the air outlet (5) on the side from which the air is blown obliquely downward, the air blown from the lower end of the opening was likely to cause a short circuit, but this air outlet (5) By setting the height position of the lower edge of the opening at a high value, it is possible to prevent the generation of an air current that is likely to cause a short circuit. As a result, it is possible to maintain a large amount of heat exchange between the air and the refrigerant in the heat exchanger (10), and avoid a decrease in the performance of the air conditioner.

  In the invention according to claim 2, the height position of the opening lower end edge of the air outlet (5) on the side where the air is blown obliquely downward is higher than the lower end position of the opening (12a) of the fan guide (12). Set to position. For this reason, an air flow particularly likely to cause a short circuit includes air blown from a position lower than the lower end position of the opening of the fan guide (12). By not doing so, it is possible to reliably suppress a short circuit and to reliably obtain the effect according to the first aspect of the present invention.

  In the invention described in claim 3, means for directing the airflow obliquely upward is provided to the air outlet from which air is blown obliquely downward. For this reason, it is possible to suppress the occurrence of a short circuit without reducing the opening area of the air outlet (5). As a result, the ability of the air conditioner can be maintained high due to the synergistic effect of preventing a short circuit and increasing the air flow rate in the casing.

  Further, in the invention described in claim 4, by providing the upward blowing guide (20) in the minimum necessary region, the improvement of the configuration of the outdoor unit (1) can be suppressed to the minimum necessary. Improvements can be made.

  In the invention according to claim 5, the air outlet is not provided on the side surface on the side where air is blown obliquely downward. For this reason, all of the air blown from the casing side face is blown obliquely upward, and the airflow blown obliquely downward, which has caused a short circuit, can be eliminated.

  In the sixth aspect of the invention, the airflow blown from the air outlet is adjusted using the Coanda effect so that the blown air does not enter the air inlet side. Also by this, the occurrence of a short circuit can be suppressed as described above, and a decrease in the performance of the air conditioner can be avoided.

  In the invention described in claim 7, the air outlet (4) is also provided on the upper surface of the casing (2). Thereby, the sum total of the opening area of an air blower outlet can be enlarged, the air circulation amount in a casing (2) can fully be ensured, and the increase in the capability of an air conditioning apparatus can be aimed at.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Embodiment 1 of the Invention
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the internal structure of the outdoor unit (1) of the air-conditioning apparatus according to this embodiment. FIG. 2 is a side view showing the internal structure of the outdoor unit (1).

-Description of overall configuration of outdoor unit-
As shown in these drawings, the outdoor unit (1) includes an air suction port (3) on the front surface of the casing (2). In addition, air outlets (4, 5, 6) are provided on the upper surface and the left and right side surfaces of the casing (2). In other words, the air outlet comprises an upper outlet (4), a right outlet (5), and a left outlet (6). A grill (not shown) is attached to the air inlet (3) and each air outlet (4, 5, 6).

  The casing (2) accommodates a heat exchanger (10) and a mixed flow fan (11) as a blower. The heat exchanger (10) is arranged to face the air suction port (3), and performs heat exchange between the outside air flowing in from the air suction port (3) and the refrigerant. The mixed flow fan (11) is arranged on the secondary side (downstream of the air flow direction) of the heat exchanger (10), and the air flow from the air inlet (3) to each air outlet (4, 5, 6) Is generated. The mixed flow fan (11) includes a fan motor (11a) fixed to the back surface of the casing (2) and a plurality of blades (11b, 11b,... Attached to a drive shaft of the fan motor (11a). ). Furthermore, a fan guide (also called a bell mouth) (12) for guiding the air that has passed through the heat exchanger (10) to the mixed flow fan (11) is attached to the heat exchanger (10). . This fan guide (12) is connected to the outer edge of the heat exchanger (10) at the upstream end in the air flow direction, and inclines toward the center side toward the downstream side, and is approximately the outer diameter of the mixed flow fan (11). It has a matching opening (12a).

  In addition, (15) in FIG. 1 is a compressor provided in the refrigerant circuit formed between the indoor unit (not shown). That is, when the compressor (15) is driven, 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. In the figure, (16) is a blowing guide provided at the opening edge of the upper blowing port (4).

-Explanation of side outlet-
The feature of this embodiment is the opening shape of the left and right side air outlets (5, 6). Prior to the description of the opening shape, the air blowing direction at each air outlet (4, 5, 6) will be described. The mixed flow fan (11) rotates in the clockwise direction in FIG. For this reason, the air flow from the mixed flow fan (11) to the air outlets (4, 5, 6) also has a swirl speed component parallel to the tangential direction of the outer periphery of the mixed flow fan (11). . That is, as shown by the arrows in FIG. 1, air is blown out obliquely to the upper right in FIG. 1 at the upper outlet (4), and air is blown out obliquely to the lower right in FIG. 1 at the right outlet (5). Furthermore, air is blown out to the upper left side of FIG. 1 at the left outlet (6).

  The feature of this embodiment is the opening lower end position of each side outlet (5, 6). The opening lower end position of the left outlet (6) through which air is blown obliquely upward to the left is set to a relatively low position. This position is a position where the opening area is set to be relatively large so that the passing air speed of the air passing through the left outlet (6) is a predetermined value or less. The air passing sound (wind noise) at the air outlet (6) is reduced by lowering the passing air speed.

  On the other hand, the opening lower end position of the right outlet (5) through which air is blown obliquely downward to the right is set higher than the opening lower end position of the left outlet (6) (A in FIG. 1). position). Specifically, the lower end position 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 from the right outlet (5) toward the lower right side flows into the casing (2) again from the air inlet (3). That is, when the opening lower end position of the right outlet (5) is set to a relatively low position like the lower opening position of the left outlet (6), the outlet is blown out from the lower opening of the right outlet (5). The generated air (see the arrow indicated by the broken line in FIG. 1) may be short-circuited due to the influence of the floor surface or the like. In particular, this tendency was remarkable in the air blown from the lower side of 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 to a relatively high position, thereby preventing the generation of air current that is likely to cause a short circuit.

-Effect of the embodiment-
Thus, by setting the opening lower end position of the right outlet (5) to a relatively high position, the air blown out from the right outlet (5) is easily short-circuited, thereby And the fall of the capability of an air conditioning apparatus can be suppressed.

<< Modification of Embodiment 1 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 this example is different from the above-described first embodiment in the direction of rotation of the mixed flow fan (11) and the installation mode of the compressor (15). Therefore, only 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 this modification, and FIG. 4 is a side view showing the internal structure of the outdoor unit (1). As shown in these drawings, the compressor (15) installed in the casing (2) of the outdoor unit (1) is a horizontal type. The compressor (15) is installed below the mixed flow fan (11). For this reason, the casing (2) of this example can have a shorter width dimension (dimension in the left-right direction in FIG. 3) than that of the first embodiment described above, and can reduce the installation space.

  Further, the mixed flow fan (11) of the outdoor unit (1) of this example rotates counterclockwise in FIG. Therefore, the flow direction of air from the mixed flow fan (11) toward each air outlet (4, 5, 6) is as shown in FIG. Air is blown out to the upper left, and air is blown out obliquely to the upper right in FIG. 3 at the right outlet (5), and further, air is blown out to the lower left in FIG. 3 at the left outlet (6). It will be.

  In this example, the lower opening position of the left outlet (6) through which air is blown obliquely to the lower left is set higher than the lower opening position of the right outlet (5). Specifically, the lower end position of the opening is set to be slightly above the lower end of the opening (12a) of the fan guide (12). In addition, when the fan (11) is rotated clockwise, the left and right are reversed.

  Also with this configuration, as in the case of the first embodiment described above, it is possible to prevent a short circuit in which the air that is blown from the left outlet (6) toward the lower left obliquely flows into the casing again from the air inlet (3). . Therefore, also in the structure of this example, the fall of the capability of an air conditioning apparatus can be suppressed by suppressing a short circuit.

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

  As shown in FIG. 5, in the present example, the lower opening position of the right outlet (5) that blows air obliquely downward coincides with the lower opening position of the left outlet (6). That is, also in the right side outlet (5), the lower end position of the opening is set to a relatively low position, and the opening area is relatively small so that the passing wind speed of the air passing through the right side outlet (5) becomes a predetermined value or less. Is set larger.

  A plurality of guide plates (20, 20,...) Serving as upward blowing guides are provided at the lower end of the opening of the right outlet (5) to guide the direction of the blown air obliquely upward. ing. The region where the guide plates (20, 20,...) Are provided is set so that the uppermost guide plate (20) is positioned 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 to the right (see the arrow in FIG. 5), and this air enters the casing again from the air inlet (3). A short circuit flowing into the circuit is prevented. Therefore, also by this example, by suppressing a short circuit, the fall of the capability of an air conditioning apparatus can be suppressed.

  The guide plate (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).

<< Embodiment 2 of the Invention >>
The second embodiment of the present invention will be described below. The outdoor unit of this embodiment has a configuration in which an air outlet is opened only on one side of the left and right sides, and no air outlet is opened on the other side. That is, in FIG. 1, an opening is not formed on the right side surface of the casing (2), but an air outlet is formed only on the left side surface (the side surface on the side that blows air obliquely upward).

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

<< Embodiment 3 of the Invention >>
Embodiment 3 of the present invention will be described below with reference to the drawings. In this embodiment, among the opening edges of the side outlets (5, 6), the short circuit is suppressed by adjusting the air flow at the edge part on the casing back side. That is, as shown in FIG. 8, in the conventional configuration, a vortex flow is generated at the edge of the opening edge of the side outlet (c, d) on the casing back side (see arrow B in FIG. 8). Due to this influence, the other airflows flow toward the front side of the casing (see arrow C in FIG. 8). In other words, since there is a vortex 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 likely to occur. Moreover, this eddy current also caused dirt adhesion to the wall surface (w).

  In this embodiment, as shown in FIG. 6, out of the opening edges of the side outlets (5, 6), the blowing guides (25, 25) as guide members are provided on the edge on the back side of the casing (2). Provided. The air flowing in the vicinity of the blow guide (25, 25) through the fan guide (12) and the mixed flow fan (11) is increased by increasing and decreasing the passage area, and then the blow guide (25, 25) while decelerating. The generation of the vortex is suppressed by the Coanda effect which acts by flowing along the fan and having a turning speed by the fan (11). And the air blown out from the side outlets (5, 6) flows along the wall surface (W) by the Coanda effect, and the air is suppressed from flowing into the front side of the casing (2). become.

  Specifically, the blowing guide (25) shown in FIG. 6 has a curved guide surface (25a) for guiding the air blown from the mixed flow fan (11) to the side outlets (5, 6). I have. Moreover, although not shown in figure, the same blowout guide (25) is provided also in the upper blower outlet (4).

  Further, as a modification of the present embodiment, the blowing 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 blowout guides (25, 25) guide the air flow by the Coanda effect, thereby suppressing the generation of vortex, avoiding the short circuit, and suppressing the decrease in the capacity of the air conditioner. . In addition, due to the suppression of eddy currents in the vicinity of the wall surface, it is possible to avoid adhesion of dirt to the wall surface (w).

  In each of the above-described embodiments, the outdoor unit (1) including the mixed flow fan (11) as the blower has been described. However, the present invention can also be applied to a unit including a propeller fan.

It is a front view which shows the internal structure of the outdoor unit which concerns on Embodiment 1. FIG. It is a side view which shows the internal structure of the outdoor unit which concerns on Embodiment 1. FIG. FIG. 6 is a view corresponding to FIG. 1 according to a first modification of the first embodiment. FIG. 3 is a view corresponding to FIG. 2 according to Modification 1 of Embodiment 1. FIG. 6 is a view corresponding to FIG. 1 according to a second modification of the first embodiment. It is a top view which shows the internal structure of the outdoor unit which concerns on Embodiment 2. FIG. It is a top view which shows the internal structure of the outdoor unit which concerns on the modification of Embodiment 2. It is a top view which shows the internal structure of the conventional outdoor unit.

Explanation of symbols

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

Claims (7)

A heat exchanger (10) and a blower (11) are accommodated in the casing (2), an air inlet (3) is formed on the front surface of the casing, and an air outlet (5, 6) is formed on each side of the right and left casings. Then, the air blown into the casing (2) from the air suction port (3) is passed through the heat exchanger (10) by the drive of the blower (11), and then blown out from each air outlet (5, 6). In outdoor unit of air conditioner,
In accordance with the direction of rotation of the blower (11), air is blown obliquely upward at one of the air outlets (5, 6) on the side surface of each casing, and the other air outlet (5). Then air is blown diagonally downward,
The height position of the lower opening edge of the air outlet (5) on the side where the air is blown obliquely downward is set to a position higher than the height position of the lower opening edge of the other air outlet (6). An air conditioner outdoor unit characterized by the above. In the outdoor unit of the air conditioning apparatus according to claim 1,
On the suction side of the blower (11), there is a fan guide (12) having an opening (12a) that guides the air sucked from the air suction port (3) to the blower (11) and surrounds the periphery of the blower (11). Provided,
The height position of the lower edge of the opening of the air outlet (5) on the side where the air is blown obliquely downward is set higher than the lower position of the opening (12a) of the fan guide (12). An air conditioner outdoor unit characterized by the above. A heat exchanger (10) and a blower (11) are accommodated in the casing (2), an air inlet (3) is formed on the front surface of the casing, and an air outlet (5, 6) is formed on each side of the right and left casings. Then, the air blown into the casing (2) from the air suction port (3) is passed through the heat exchanger (10) by the drive of the blower (11), and then blown out from each air outlet (5, 6). In outdoor unit of air conditioner,
Depending on the direction of rotation of the blower (11), one of the air outlets (5, 6) on the side surface of each casing has one of the air outlets (6) through which air is directed obliquely upward and the other air outlet (5 ) Is designed to pass air that goes diagonally downward,
An air conditioner characterized in that an upward blowing guide (20) for directing an air flow of the passing air obliquely upward is provided at the air outlet (5) on the side through which the air directed obliquely downward passes. Equipment outdoor unit. In the outdoor unit of the air conditioning apparatus according to claim 3,
The outdoor unit for an air conditioner characterized in that the upward blowing guide (20) is provided only at the lower part of the air outlet (5) on the side through which air traveling obliquely downward passes. A heat exchanger (10) and a blower (11) are accommodated in the casing (2), an air suction port (3) is formed on the front surface of the casing, and an air blower outlet (6) is formed on the side surface of the casing. In the outdoor unit of the air conditioner that blows out the air sucked into the casing (2) from the air inlet (3) through the heat exchanger (10) and then blows out from the air outlet (6)
The air outlet (6) on the side surface of the casing is provided only on the side surface on the side from which air is blown obliquely upward according to the rotation direction of the blower (11). . A heat exchanger (10) and a blower (11) are accommodated in the casing (2), an air suction port (3) on the front surface of the casing, and an air outlet (5, 6) on at least one of the casing upper surface and the casing side surface. After the air sucked into the casing (2) from the air suction port (3) is passed through the heat exchanger (10) by driving the blower (11), the air blower outlet (5, 6 In the outdoor unit of the air conditioner that blows out from
Of the opening edges of the air outlets (5, 6), the opening edge located on the back side of the casing (2) is provided with a guide member (25) for blowing the blown air substantially parallel to the back of the casing by the Coanda effect. An air conditioner outdoor unit characterized by the above-mentioned. In the outdoor unit of the air conditioning apparatus of Claims 1-5,
An air conditioner outdoor unit, wherein an air outlet (4) is also provided on the upper surface of the casing (2).

Images