JP2004271044A - Indoor unit of air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indoor unit of an air conditioner capable of improving the static pressure of the air flow even in a low static pressure type blower, and stabilizing the blown-out air quantity while minimizing the ventilating resistance. <P>SOLUTION: A heat exchanger, a cross flow fan, a rear casing and a stabilizer are mounted in a casing, and a triangle pole-shaped wedge is mounted in a blowout ventilation flue formed by the rear casing and the stabilizer in a state that its apex is directed to an upstream side. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to an indoor unit of an air conditioner equipped with a cross flow fan (cross-flow blower), and more particularly to a blowing performance.
[0002]
[Prior art]
In the prior art, an external perspective view of the air conditioner is shown in FIG. FIG. 3A is a cross-sectional view taken along line AA in FIG. FIG. 3B is a main part arrow view of the vicinity of the blowout portion viewed from the direction C in FIG. 3A. FIG. 3C is a cross-sectional view taken along line II-II in FIG.
[0003]
On the side wall 2 in the downstream area of the cross flow fan 1, a projection 4 is formed over the entire width of the ventilation path 3. The protrusion 4 has a first step 4a and a second step 4b with respect to the inner side surface of the side wall 2, as shown in FIG. Reference numerals 5a and 5b denote the lengths of the steps 4a and 4b in the rotation axis direction of the cross flow fan 1, respectively.
[0004]
Since the projection 4 has such a two-level step, the width of the ventilation passage 3 in the rotation axis direction of the cross flow fan 1 is reduced to two levels. As a result, the fluctuation component in the rotation axis direction of the air flow blown by the cross flow fan 1 is reduced, so that the flow of the blowout flow can be made smooth and the static pressure can be increased (for example, see Patents). Reference 1).
[0005]
[Patent Document 1]
JP 2000-291973 A
[Problems to be solved by the invention]
However, the above-described conventional means for improving the performance can increase the static pressure at the side wall of the blower, but cannot sufficiently increase the static pressure near the center of the blower circuit. Therefore, when a large amount of dust and dirt adhere to the air filter during actual use, that is, when the load is high, there is a problem that the amount of blown air is not stable and the air flow characteristics are deteriorated. In addition, there is a problem that an intermittent abnormal noise called "basabasa" (hereinafter referred to as "basatsuki sound") is caused to increase noise.
[0007]
The present invention solves the above-mentioned conventional problems, and stabilizes the amount of blown air while smoothing the air flow and minimizing the ventilation resistance in an air passage using a fan of a cross flow fan. It is an object of the present invention to provide an indoor unit of an air conditioner that can achieve the above.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the indoor unit of the air conditioner of the present invention is an indoor unit of an air conditioner including a heat exchanger, a cross flow fan, a rear casing, and a stabilizer in a box body, A triangular prism-shaped wedge having a vertex directed upstream is provided in an air passage downstream of the cross flow fan formed by the rear casing and the stabilizer. According to this configuration, the flow of the air blown by the cross flow fan is suppressed by disposing a triangular prism-shaped wedge to suppress the axial turbulence of the flow, rectifying the air flow, suppressing the squeaking noise, and reducing the air flow. The flow can be smooth. That is, it is possible to stabilize the blown air volume while minimizing the ventilation resistance.
[0009]
In addition, the triangular prism-shaped wedge is an isosceles triangle, and is disposed so as to be directed to the upstream side of the ventilation path. The flow can be smooth.
[0010]
In addition, if the apex of the triangular prism-shaped wedge is provided at a position facing the continuous partition disk of the cross flow fan having a multiple structure, the axial turbulence of the flow is suppressed, and the air flow is rectified so that the air flow is rough. It is more effective for suppressing noise and smoothing the air flow.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the appearance perspective view of the air conditioner is the same as that of FIG. FIG. 1A is a cross-sectional view taken along the line AA of FIG. 2, and FIG. 1B shows only the cross flow fan 1 and the triangular prism-shaped wedge 6 shown in FIG. It is the figure seen from the direction of the arrow in a).
[0012]
The cross flow fan 1 is formed by providing a plurality of blades 1b having a certain length between the partition disks 1c and combining a plurality of impellers 1a arranged in a columnar shape in a rotation axis direction.
[0013]
In the present embodiment, a triangular prism-shaped wedge 6 is formed in a blow-out ventilation path formed by the rear casing 7 and the stabilizer 8 of the indoor unit of the air conditioner, with one vertex of the triangle facing the upstream side of the ventilation path. It is arranged. Thus, by disposing the air flow blown by the cross flow fan 1 with the triangular prism-shaped wedges 6, the axial turbulence of the flow is suppressed, and the air flow is rectified to suppress the sound of the air flow. Flow can be smooth. That is, it is possible to stabilize the blown air volume while minimizing the ventilation resistance.
[0014]
The number of the wedges is not particularly limited, but is preferably about 2 to 4 for a general wall-mounted air conditioner. In addition, if the thickness z of the wedge is too large, the airflow resistance is adversely affected.
[0015]
As shown in FIG. 1B, the triangular prism-shaped wedge 6 is formed into an isosceles triangle so that the length of the side becomes x = y, so that the flow of air rectified by the triangular prism-shaped wedge 6 is increased. In this case, the flows on the sides x and y become uniform, so that the noise can be more effectively suppressed and the air flow can be made smoother.
[0016]
Further, as shown in FIG. 1B, the arrangement of the triangular prism-shaped wedges 6 is such that the apex is directed to the position between the series of the cross flow fans 1, that is, immediately downstream of the partition disk. Since the air blown by the cross flow fan is blown by each of the reams, the flow is likely to be disturbed between the reams. Therefore, by arranging at this position, the rattling noise can be suppressed more effectively, and the air flow can be smoothed.
[0017]
【The invention's effect】
As described above, according to the indoor unit of the air conditioner of the present invention, the flow of the air blown by the crossflow fan is suppressed by disposing a wedge having a triangular prism shape to suppress axial turbulence such as backflow, The flow of air can be rectified to suppress rustling noise, and the air flow can be increased in static pressure.
[0018]
In addition, the triangular prism-shaped wedge has a triangular shape as an isosceles triangle, and a vertex at which the long sides of the isosceles triangle intersect is disposed so as to face the upstream side of the ventilation path. It is more effective to rectify the air flow to suppress the rustling sound and to increase the air flow to a high static pressure.
[0019]
Further, the triangular prism-shaped wedge may have an apex of a triangle directed to the upstream side of the ventilation path, which extends from a section of the cross flow fan having a multiple structure in a direction perpendicular to a rotation axis of the cross flow fan. In other words, it is possible to dispose the apex immediately downstream of the partitioning disk so as to suppress the axial turbulence of the flow, to rectify the air flow, suppress the rattling noise, and to increase the air flow to a high static pressure. It is more effective.
[Brief description of the drawings]
1A is a cross-sectional view of an indoor unit of an air conditioner according to an embodiment of the present invention. FIG. 1B is a diagram showing the positional relationship between a cross flow fan and a triangular prism wedge. FIG. 3 (a) is a cross-sectional view taken along line AA of FIG. 2 (b) is an enlarged view of a main part from a direction C in FIG. 2 (c) is a cross-sectional view taken along line II-II of FIG. ]
DESCRIPTION OF SYMBOLS 1 Cross flow fan 1c Partition disk 3 Ventilation path 6 Wedge 7 Rear casing 8 Stabilizer

Claims (3)

In a box body, a heat exchanger, a cross flow fan, a rear casing, and an indoor unit of an air conditioner including a stabilizer, in a ventilation path on a blowout side formed by the rear casing and the stabilizer, An indoor unit for an air conditioner, comprising a triangular prism-shaped wedge whose apex is directed to the wind improvement flow side. The indoor unit of an air conditioner according to claim 1, wherein the wedge is an isosceles triangle. The indoor unit of an air conditioner according to claim 1 or 2, wherein the apex of the wedge is provided at a position facing a partition between the rows of the cross flow fan having a multiple structure.

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