JP2784084B2 - Outdoor unit of air conditioner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit of an air conditioner, and more particularly, to an outdoor unit in which a front plate is provided on an air blowing side of a fan to change a flow direction of air. Things.

[Conventional technology]

FIG. 8 is a cross-sectional view of an outdoor unit of an air conditioner in which a front plate is provided on the blow-out side of a conventional fan disclosed in, for example, Japanese Utility Model Publication No. 63-144520, as viewed from above. 2 shows the internal configuration of the machine. In the figure, 1 is a cabinet, 2 is a compressor, 3 is a soundproof wall for blocking noise generated from the compressor 2, 4 is a machine room in which the compressor 2 and the like are installed,
5 is a heat exchanger, 6 is an air intake grill provided at a position facing the heat exchanger 5, 7 is an axial fan, 8 is a fan motor for driving the axial fan 7 to rotate, and 9 is an axial fan 7
An annular bell mouth 10 is provided on the air outlet side of the axial flow fan 7 to change the direction of air flow along the rotation axis of the axial flow fan 7. It has the above area. Reference numeral 11 denotes a fan room having a heat exchanger 5, a suction grille 6, an axial fan 7, a fan motor 8, a bell mouth 9, and a front plate 10. The machine room 4 is located on the side of the fan room 11. .

The following operation will be described. FIG. 9 shows a state in which the outdoor unit of the air conditioner having the above configuration is installed on a fixed base such as the ground. When the axial fan 7 rotates by driving the fan motor 8, external air is sucked into the cabinet 1 from the direction A through the suction grill 6. After the heat is exchanged in the heat exchanger 5, the air flows along the rotation axis of the axial fan 7 and hits the front plate 10. Then, the direction of flow in the direction B (radial direction of the axial fan 7) is changed by the front plate 10, and the air blown downwards further hits a fixed base such as the ground, and a part of the air flows in the direction C so that the air flows in the direction A. Merges with the air flowing in the direction. This flow in the direction C is called a short cycle, and is sucked into the cabinet 1 from the suction grill 6 again.

[Problems to be solved by the invention]

The outdoor unit of the conventional air conditioner is configured as described above, and the air flow along the rotation axis of the fan is changed in the radial direction (rotation direction) of the fan by the front plate.
There is a problem that a short cycle occurs in which a part of the air flowing downward goes to the suction side again, and the performance is reduced.

The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide an outdoor unit of an air conditioner that prevents a short cycle from occurring, does not reduce performance, and has a small installation space. The purpose is.

[Means for solving the problem]

The outdoor unit of the air conditioner according to the present invention has a fan driven by a fan motor and an area larger than the fan located on the air blowing side of the fan and changing a flow direction of air along a rotation axis of the fan. In an outdoor unit of an air conditioner having a fan chamber having a front panel having the same, a truncated cone whose peripheral portion is inclined in a conical shape is provided on a fan-side surface of the front panel, and an annular ring surrounding the fan is provided. Forming a surface parallel to the inclined surface of the truncated cone on the outer peripheral surface of the bell mouth,
The direction of air flow along the axis of rotation of the fan is changed obliquely outward, and the truncated cone is a first layer that is a fusion layer having a thickness of 100 microns or less from a surface facing the fan, The second layer is a porous layer having a specific gravity smaller than that of the first layer and having a specific gravity changed in the thickness direction of the layer or the plane direction of the layer, and the third layer is a fusion layer having a specific gravity larger than that of the first layer. And a porous structure formed of the following layers.

(Operation)

In the outdoor unit of the air conditioner of the present invention, the air that has passed through the fan flows obliquely from between the inclined surface around the truncated cone and the bell mouth that forms the outer peripheral surface parallel to the inclined surface. The reflected air does not return to the suction side.

Further, in the outdoor unit of another air conditioner of the present invention, the flow of air that has passed through the fan and has been changed in the radial direction of the fan by the front panel is controlled by a wind shield provided below the outdoor unit main body. The blocked and blown air does not return to the suction side again.

〔Example〕

FIG. 1 is a sectional view showing a first embodiment of the present invention.
8 denote the same components. In the figure, 1 is a cabinet of the entire outdoor unit of the air conditioner, 2
Is a compressor, 3 is a noise barrier which blocks noise of the compressor 2, 4 is a machine room in which the compressor 2 and the like are installed, 5 is a heat exchanger, 6 is an air suction grill, and 7 is driven by a fan motor 8. An axial flow fan, 9 is an annular bell mouth surrounding the axial flow fan 7, and 10 is a front plate located on the air blowing side of the axial flow fan 7 and changing the direction of air flow along the rotation axis of the axial flow fan 7 And has an area equal to or greater than the axial fan 7. Reference numeral 11 denotes a fan chamber in which the axial fan 7 and the front plate 10 are installed. Reference numeral 12 denotes a truncated cone provided on the fan side of the front plate 10, the periphery of which has a conical slope 12a. The outer peripheral surface 9a of the mouse 9 is formed parallel to the inclined surface 12a. By blowing air from between the truncated cone 12 and the bell mouth 9, the direction of air flow along the rotation axis of the axial fan 7 is changed to an oblique direction toward the outside.

Next, the operation will be described. FIG. 2 shows a state where the outdoor unit of FIG. 1 is installed on a fixed base such as the ground. When the axial fan 7 rotates, air is sucked into the cabinet 1 from the direction A through the suction grill 6. After passing through the heat exchanger 5, the air flows along the rotation axis of the axial fan 7 and strikes a truncated cone 12 provided on the front plate 10. Then, while flowing in the radial direction of the axial fan 7, the air is blown obliquely forward in the direction B from between the inclined surface 12 a of the truncated cone 12 and the outer peripheral surface 9 a of the bell mouth 9. For this reason, the blown air is not reflected and sucked again, and the installation space is reduced.

In general, a front plate 10 is provided on the blowout side to blow air in the radial direction of the fan to reduce the installation space, and in a blower having an air flow accompanied by heat exchange, the heat-exchanged air is sucked in again. Although the heat exchange efficiency deteriorates due to the short cycle, which leads to a decrease in the performance of the air conditioner, in this embodiment, as described above, the air sucked in from the A direction is provided on the fan side of the front plate 10 on the blowing side. Truncated cone
The bell mouth 9 having an outer peripheral surface 9a parallel to 12 blows out diagonally forward in the B direction, so that a short cycle does not occur, so that the performance of the air conditioner is not reduced and the installation space is reduced. Can be realized.

FIG. 3 is a sectional view showing a second embodiment of the present invention.
In the above embodiment, the axial fan 7 is used, but in this embodiment, the diagonal fan 13 is used. The use of the mixed flow fan 13 can further promote the blowout diagonally forward.

FIG. 4 is a sectional view showing a third embodiment of the present invention.
In this embodiment, a truncated cone 14 formed of a porous structure having a porous layer is provided on the surface of the front plate 10 on the side of the mixed flow fan 13, and an inclined surface 14 a is formed in a peripheral portion. I have. The truncated cone 14 has a porous layer whose specific gravity changes continuously in the thickness direction of the layer or in the plane direction of the layer. By using the truncated cone 14 of this porous structure, the suction side And the noise on the blowing side can be reduced.

FIG. 5 is a sectional view schematically showing the structure of the truncated cone 14. In the figure, 15 is a fused layer having a large specific gravity, 16 is a porous layer having a small specific gravity, 17 is a skin layer having an intermediate specific gravity between them, and the skin layer 17 is, for example, a fused layer having a thickness of 100 μm or less. . The fusion layer is a layer formed of a material in which a porous portion and a non-porous portion are fused.

FIG. 6 is a sectional view showing a reference example for preventing a short cycle, and the same reference numerals as those in FIG. 2 indicate the same components. In this reference example, a wind shield plate 20 for blocking the flow of air is provided below a bottom surface 1a of a cabinet 1 which is a box-shaped outdoor unit main body in which an axial fan 7 is housed. The wind shield plate 20 is provided on the bottom surface 1a of the cabinet 1.
Is mounted via a hinge or the like, and the height is variable according to the fixed position of the cabinet 1.

In the outdoor unit configured as described above, a part of the air flowing in the radial direction of the axial fan 7 hits the installation surface of the cabinet 1 and is divided into the outdoor unit front side and the outdoor unit side. The air flow toward the machine is blocked by the wind shield plate 20 below the cabinet 1, and the flow of the heat-exchanged air does not return to the suction side again, thereby preventing the occurrence of a short cycle. Therefore, the installation space can be reduced without lowering the performance as an air conditioner. Further, as shown in the drawing, the wind shield plate 20 supports the outlet side end with a hinge or the like, and has the suction side end as a free end. For this reason, the free end can be fixed with tape or the like during transportation and transportation, and if the fixing tool such as tape is removed at the time of installation, the height is determined according to the installation conditions, and it is possible to respond to any height Can be.

FIG. 7 is a sectional view showing another reference example for preventing a short cycle. In this reference example, a mixed flow fan 13 is used in place of the axial flow fan 7 in FIG. By using the mixed flow fan 13, the blowing of air obliquely forward can be further promoted as in the embodiment of FIG.

〔The invention's effect〕

As described above, according to the present invention, a fan driven by a fan motor and an area larger than the fan located on the air blowing side of the fan and changing the flow direction of air along the rotation axis of the fan are provided. In an outdoor unit of an air conditioner having a fan chamber provided with a front panel, a circular truncated cone whose peripheral portion is inclined in a conical shape is provided on a fan-side surface of the front panel, and an annular ring surrounding the fan is provided. A surface parallel to the inclined surface of the truncated cone is formed on the outer peripheral surface of the bell mouth so as to change the direction of air flow along the rotation axis of the fan in an oblique direction toward the outside, and the truncated cone faces the fan. From the surface to be fused, the first
, A second layer which is a porous layer having a specific gravity smaller than that of the first layer and having a specific gravity changed in a thickness direction of the layer or in a plane direction of the layer, and a fusion layer having a specific gravity higher than that of the first layer. Since the porous structure is formed by the third layer, air is blown obliquely forward, the occurrence of short cycle is prevented, and the installation space can be reduced without lowering the performance. In addition, noise on the suction side and the blowout side can be reduced.

[Brief description of the drawings]

1 is a sectional view showing a first embodiment of the present invention, FIG. 2 is a sectional view showing the operation of the outdoor unit of the air conditioner shown in FIG. 1, and FIG.
FIG. 4 is a sectional view showing a second embodiment of the present invention, FIG. 4 is a sectional view showing a third embodiment of the present invention, FIG. 5 is a sectional view showing the structure of the truncated cone of FIG. 4, and FIG. 7 is a sectional view showing a reference example for preventing a short cycle, FIG. 8 is a sectional view showing a conventional example, and FIG. 9 is a sectional view showing the operation of the outdoor unit of the air conditioner shown in FIG. It is. DESCRIPTION OF SYMBOLS 1 ... Cabinet (outdoor unit main body) 1a ... Bottom surface 2 ... Compressor 3 ... Soundproof wall 4 ... Machine room 5 ... Heat exchanger 6 ... Suction grill 7 ... Axial fan 8 ... Fan motor 9: Bellmouth 9a: Outer peripheral surface 10: Front panel 11: Fan chamber 12: Conical cone 12a: Inclined surface 13: Mixed flow fan 14: Conical cone 14a: Inclined surface 15: Fusion Layer 16: Porous layer 17: Skin layer 18: Heat exchanger 19: Front plate 20: Wind shield plate The same reference numerals in the drawings denote the same or corresponding parts.

Continuation of the front page (56) References JP-A-52-151241 (JP, A) JP-A 62-100426 (JP, U) JP-A 58-162466 (JP, U) (58) Fields investigated (Int) .Cl. ⁶ , DB name) F24F 5/00 F25B 39/00

Claims (1)

(57) [Claims] A fan driven by a fan motor;
An outdoor unit of an air conditioner, comprising: a fan chamber provided with a front panel having an area equal to or greater than the fan, which is located on an air blowing side of the fan and changes a flow direction of air along a rotation axis of the fan. A peripheral portion is provided with a truncated cone that is inclined in a conical shape on the surface of the front plate on the side of the fan, and a surface parallel to the inclined surface of the truncated cone is formed on an outer peripheral surface of an annular bell mouth that surrounds the fan, The direction of air flow along the axis of rotation of the fan is changed obliquely outward, and the truncated cone is a first layer that is a fusion layer having a thickness of 100 microns or less from a surface facing the fan, The second layer is a porous layer having a specific gravity smaller than that of the first layer and having a specific gravity changed in the thickness direction of the layer or the plane direction of the layer, and the third layer is a fusion layer having a specific gravity larger than that of the first layer. A porous structure formed of Outdoor unit of an air conditioner according to claim.