JPH0861685A - Indoor unit for air conditioner - Google Patents

Abstract

PURPOSE: To smooth the flow of the air generated by a stabilizer, to reduce the drift and the disorder and to improve the flow rate performance. CONSTITUTION: A channel is gradually from the end 9 disposed at the shortest distance from the fan 2 of a stabilizer 4 to the sharpened end 10 of the end 4a extending in the rotating direction of the fan 2, and a channel is gradually at the heat exchanger 7a side of the end 4a of the stabilizer 4 toward the end 10 at the shortest distance point 16 of a heat exchanger 7a. Thus, the flow of the leakage of the air generated from the end 9 toward the end 10 can be smoothed, and large disorder can not be generated at the air flowing from the lower part of the exchanger 7a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor unit of an air conditioner used for air conditioning of a house or the like.

[0002]

2. Description of the Related Art An indoor unit of a conventional air conditioner will be described below.

As shown in FIG. 8, a cross-flow fan (hereinafter referred to as a fan) 2 is formed by combining a plurality of blades 1 having a constant length in a cylindrical shape in a cylindrical shape and combining them together in the direction of the rotation axis. , Rear guider 3 on the back
The air discharge path 5 is formed by the stabilizer 4 and the stabilizer 4 arranged therebelow.

By the rotational driving of the fan 2 in the direction shown by the arrow, the air introduced from the suction grill 6 passes through the heat exchanger 7 and is discharged from the outlet 8 via the discharge passage 5.

The tip portion 4a of the stabilizer 4 is attached to the fan 2
A tip 9 is formed on the side facing the heat exchanger, and a tip 10 of the suction flow guide extending in the rotation direction of the fan 2 is formed on the side facing the heat exchanger 7.

The tip 9 is a point at which the distance between the stabilizer 4 and the fan 2 is the shortest. A sharp step is formed from the tip 9 of the stabilizer 4 toward the tip 10, and the tip 10 forms a sharp edge from the heat exchanger 7 side.

Reference numeral 11 in the figure is a wind direction valve. Regarding the indoor unit of the air conditioner configured as described above,
The operation will be described below.

When the fan 2 is driven, in addition to the mainstream air flowing in from the suction grill 6 and being discharged from the outlet 8, air leaks from the projecting end 9 of the stabilizer 4 in the direction of rotation of the fan 2. Occurs. When the leak flow passes between the fan 2 and the stabilizer 4 until it flows into the fan 2 again, turbulence occurs and noise rises.

Further, the air flowing from the lower part of the heat exchanger 7 collides with a portion of the tip end 4a of the stabilizer 4 extending in the rotation direction of the fan 2 to cause turbulence, and then flows into the fan 2 in that state. It leads to noise rise.

Further, due to the above-mentioned leakage flow of air and the uneven flow generated when the air flowing from the lower part of the heat exchanger 7 merges at the tip 10 of the stabilizer 4, the flow becomes unstable and the flow rate performance deteriorates. .

Further, the turbulence further increases due to the wake flow generated from the tip 10 of the stabilizer 4, and the noise is remarkably increased.

An invention has been made in which a smooth air flow in the main body is ensured to reduce the noise of the air conditioner (see, for example, Japanese Unexamined Patent Publication No. 5-87360).

[0013]

As described above, in the conventional structure, the leakage flow of air from the tip 9 of the stabilizer 4, the air flowing from the lower portion of the heat exchanger 7, and the tip 10 of the stabilizer 4 are generated. There is a problem that noise is increased due to a wake or the like, and the flow rate performance is deteriorated due to uneven flow generated when the leak flow of air and the air flowing from the lower part of the heat exchanger 7 merge.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an indoor unit of an air conditioner which prevents an increase in noise due to an air flow and does not deteriorate the flow rate performance.

[0015]

In order to achieve this object, the indoor unit of the air conditioner of the present invention has the shortest distance from the fan on the fan side of the tip portion extending in the rotation direction of the fan of the stabilizer. The air passage is gradually expanded from the tip toward the tip of the tip, and at the heat exchanger side of the tip of the stabilizer, the air flow gradually increases from the shortest distance point to the heat exchanger toward the tip. The structure is such that the road is enlarged.

[0016]

In this structure, at the tip of the stabilizer, the leakage flow that occurs from the tip at the shortest distance from the fan toward the tip becomes smooth, and the air that flows in from the lower part of the heat exchanger is greatly disturbed. It will be smoothly sucked in by the fans.

[0017]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

In one embodiment of the present invention, the same parts as those described in the above-mentioned conventional example are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIGS. 1 and 2, the main body 12 comprises an underframe 13 and a front cover 14 attached to the front of the underframe 13, and the underframe 13 and the front cover 14 are provided.
An indoor air intake grill 15 is provided in the upper part of the. Further, two heat exchangers 7a and 7b are arranged so as to surround the entire area of the fan 2 when viewed from the center.

In the stabilizer 4 of this embodiment, the distance between the tip 4a and the fan 2 is gradually increased from the tip 9 of the tip 4a toward the tip 10, and the heat exchanger 7a of the tip 4a is expanded. The distance between the heat exchanger 7a and the heat exchanger 7a is gradually increased from the shortest distance point 16 having the shortest distance to the tip 10.

With this configuration, as shown in FIG. 3, in the tip portion 4a of the stabilizer 4 extending in the rotation direction of the fan 2, a dotted line formed from the tip 9 which is the shortest distance point from the fan 2 toward the tip 10. The air leakage flow indicated by the arrow flows smoothly. Further, the air that has flowed in from the lower portion of the heat exchanger 7a as shown by the arrow is the tip portion 4 of the stabilizer 4.
Although it collides with a, it is smoothly sucked into the fan 2 without causing a large disturbance. Therefore, an increase in noise due to air turbulence can be prevented, and noise can be reduced.

(Embodiment 2) A second embodiment of the present invention will be described below.

As shown in FIG. 4, this embodiment has a structure in which the tip 10 of the tip 4a of the stabilizer 4 is provided with a substantially semi-cylindrical radius (r) in addition to the structure of the first embodiment.

With this structure, the leak flow of the air of the first embodiment and the air flowing in from the lower part of the heat exchanger 7a are smoothly merged at the tip 10 of the stabilizer 4, and a stable flow field is formed to improve the flow rate performance. To do. In addition, wake turbulence at the tip 10 of the stabilizer 4 is reduced, and noise is reduced.

(Third Embodiment) A third embodiment of the present invention will be described below.

As shown in FIG. 5, in this embodiment, in addition to the structure of the first embodiment, the distance between the protruding end 9 and the fan 2 is t, and the fan 2 is gradually moved toward the tip 10 of the tip 4a of the stabilizer 4.
Assuming that the distance between the fan 2 and the vicinity of the tip 10 in which the distance between and is enlarged is T, t / T is less than 0.95.

As described above, the tip end portion 4a of the stabilizer 4 is appropriately sized by appropriately determining the degree to which the distance from the fan 2 is gradually increased from the tip 9 to the tip 10.
At the shortest distance from the fan 2, at the tip 10
The flow of air that leaks toward the air can be smoothed and noise can be reduced.

When t / T is 0.95 or more, the viscosity of the stabilizer 4 and the rotation of the fan 2 affect the air flow to cause a large turbulence and increase the noise.

The same effect can be obtained by using the present embodiment in combination with the second embodiment. (Fourth Embodiment) A fourth embodiment of the present invention will be described below.

As shown in FIG. 6, in this embodiment, in addition to the structure of the first embodiment, the distance d between the shortest distance point 16 and the heat exchanger 7a is d, the tip 10 of the tip 4a of the stabilizer 4 and the heat exchanger 7a. When the distance from 7a is D, d / D is less than 0.97.

As described above, from the shortest distance point 16 to the tip 1
By appropriately dimensioning the degree to which the distance to the fan 2 is gradually increased toward 0, the air flowing in from the lower part of the heat exchanger 7a is smoothly sucked into the fan 2 without causing a large turbulence. Can reduce noise.

When d / D is 0.97 or more, the air introduced from the lower part of the heat exchanger 7a is the stabilizer 4
After colliding with the portion of the fan 2 extending in the rotation direction, the noise is increased in the state of being greatly disturbed and being introduced into the fan 2.

Even if the present embodiment is used in combination with the above-mentioned embodiment 2 or 3, the same effect can be obtained. (Fifth Embodiment) The fifth embodiment of the present invention will be described below.

As shown in FIG. 7, in this embodiment, the thickness of the tip portion 4a of the stabilizer 4 is R,
When the radius of the substantially semi-cylindrical shape of the tip 10 of the tip portion 4a is r, r / R is less than 0.9.

As described above, by appropriately dimensioning the radius (r) of the tip 10, the distance between the stabilizer 4 and the fan 2 is generated from the tip 9 where the distance between the stabilizer 4 and the fan 2 is the shortest toward the rotation direction of the fan 2. The leak flow and the air flowing in from the lower portion of the heat exchanger 7a smoothly merge at the tip 10 to improve the flow rate performance. Further, the turbulence of the wake generated from the tip 10 is reduced, and the noise can be reduced.

When r / R is 0.9 or more, there is a leakage flow of air generated in the rotation direction of the fan 2 from the tip 9 where the distance between the tip 4a of the stabilizer 4 and the fan 2 is the shortest. The air flowing from the lower part of the heat exchanger 7a becomes unstable due to the unbalanced flow generated when the air merges at the tip 10 of the stabilizer, and the flow rate performance deteriorates. Further, turbulence is further increased by the wake generated from the tip 10 and the turbulence is introduced into the fan 2, so that noise is significantly increased.

The same effect can be obtained by using this embodiment in combination with any of the above-mentioned second to fourth embodiments.

[0038]

As is apparent from the above description, according to the present invention, on the fan side of the tip portion of the stabilizer extending in the rotation direction of the fan, the tip of the tip portion extends from the tip at the shortest distance from the fan. The air flow path is gradually expanded, and the air flow path is gradually expanded from the shortest distance point to the heat exchanger on the heat exchanger side at the tip of the stabilizer toward the tip. It is possible to realize an excellent air conditioner indoor unit that prevents an increase in noise due to flow and does not deteriorate flow rate performance.

[Brief description of drawings]

1A is a schematic cross-sectional view of an indoor unit of an air conditioner according to a first embodiment of the present invention, and FIG. 1B is an enlarged cross-sectional view of a main part of the indoor unit of the air conditioner.

FIG. 2 is an external perspective view of an indoor unit of the air conditioner.

FIG. 3 is an enlarged sectional view of an essential part showing an air flow velocity distribution in the vicinity of a stabilizer of an indoor unit of the air conditioner.

FIG. 4A is an enlarged cross-sectional view of a main part of an indoor unit of an air conditioner according to a second embodiment of the present invention, and FIG. 4B is an enlarged cross-sectional view of a tip of a stabilizer of the indoor unit of the air conditioner.

FIG. 5 is an enlarged sectional view of an essential part of an indoor unit of an air conditioner according to a third embodiment of the present invention.

FIG. 6 is an enlarged cross-sectional view of a main part of an indoor unit of an air conditioner according to a fourth embodiment of the present invention.

FIG. 7 is an enlarged sectional view of an essential part of an indoor unit of an air conditioner according to a fifth embodiment of the present invention.

FIG. 8A is a schematic cross-sectional view of an indoor unit of a conventional air conditioner, and FIG. 8B is an enlarged cross-sectional view of the tip of a stabilizer of the indoor unit of the air conditioner.

[Explanation of symbols]

 2 fan (cross flow fan) 3 rear guider 4 stabilizer 7a, 7b heat exchanger 9 tip 10 tip 12 tip body 16 shortest distance point

Claims (5)

[Claims] 1. An indoor unit of an air conditioner comprising a crossflow fan, a stabilizer, a rear guider, and a heat exchanger inside the main body, wherein the stabilizer extends in the rotational direction of the crossflow fan. On the cross-flow fan side of the tip, gradually increase the distance between the tip and the cross-flow fan from the tip having the shortest distance to the cross-flow fan toward the tip of the tip, and On the heat exchanger side of the tip portion, the distance from the heat exchanger is the shortest distance point, the distance from the heat exchanger is gradually increased from the shortest distance point toward the tip. The indoor unit of the air conditioner. 2. The indoor unit of an air conditioner according to claim 1, wherein the stabilizer is provided with a tip having a substantially semi-cylindrical rounded shape at the tip thereof. 3. The stabilizer has a ratio (t / T) of a distance (t) between the tip of the tip and the crossflow fan and a distance (T) between the tip of the tip and the crossflow fan.
The indoor unit of the air conditioner according to claim 1 or 2, wherein the ratio is less than 0.95. 4. The stabilizer has, on the heat exchanger side of its tip, a distance (d) between the shortest distance point of the tip and the heat exchanger, and a distance between the tip of the tip and the heat exchanger ( The indoor unit of an air conditioner according to any one of claims 1 to 3, wherein the ratio (d / D) with D) is less than 0.97. 5. The stabilizer has a ratio (r / r) between the thickness (R) of its tip and the radius (r) of a substantially semi-cylindrical tip.
The indoor unit of the air conditioner according to any one of claims 1 to 4, wherein R) is less than 0.9.