JP2002276974A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner, in which Karman vortex generated on fins on a suction side of a heat exchanger 8 is controlled, and wind noise is reduced. SOLUTION: At lest a pair of vertical deflectors 11 is placed in a heat exchanger 8 provided in facing to the front of an outlet of a casing 6. Thus, the slantingly flowing stream discharged from the outlet of the casing 6 is deflected by the vertical deflectors 11, and generation of Karman vortex is effectively controlled on the fins of the heat exchanger 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner provided with a means for suppressing wind noise generated in a heat exchanger using a multi-blade fan.

[0002]

2. Description of the Related Art In recent years, indoor units of air conditioners have been reduced in size and weight by improving the heat exchange performance by improving the fin shape and increasing the number of fins as high efficiency heat exchangers.
Therefore, noise increases due to the flow of the blast passing through the heat exchanger.

An air conditioner provided with a conventional noise reduction measure is disclosed in Japanese Patent Application Laid-Open No. Hei 10-220858.

Hereinafter, the conventional air conditioner will be described with reference to the drawings.

FIG. 7 is a cross-sectional view of a conventional air conditioner. FIG. 8 is a vertical cross-sectional view of a main part of a blower blowing section of a conventional air conditioner. In FIG. 7, 1 is an air conditioner body,
Reference numeral 2 denotes a suction grill for taking indoor air into the air conditioner body 1. Reference numeral 5 denotes a multi-blade fan for blowing air, and reference numeral 6 denotes a casing having an inlet and an outlet for the multi-blade fan 5. Reference numeral 7 denotes a guider provided on the outlet side of the casing 6, which is a horizontal guider 7a for deflecting a vertical flow in a wind direction and a vertical guider 7b for deflecting a horizontal flow in a wind direction.
Consists of Reference numeral 8 denotes a heat exchanger that exchanges heat with room air to perform cooling and heating. Reference numeral 9 denotes an outlet for blowing out the heat-exchanged air into the room again.

The operation of the air conditioner configured as described above will be described below.

First, indoor air flows into the air conditioner main body 1 from the suction grill 2 and is blown toward the heat exchanger 8 from the outlet of the casing 6 by the rotation of the multi-blade fan 5. At this time, the flow blown by the plurality of horizontal guiders 7a and the vertical guiders 7b of the guider 7 provided on the outlet side of the casing 6 is deflected in the vertical and horizontal directions with respect to the heat exchanger 8. Then, the air that has flowed into the heat exchanger 8 and subjected to heat exchange blows back into the room through the outlet 9.

[0008]

However, in the above-mentioned conventional configuration, the outlet flow deflected by the guider 7 composed of the horizontal guider 7a and the vertical guider 7b is supplied to the heat exchanger 8 in the vicinity of the heat exchanger 8. As a result, Karman vortices are generated in the fins constituting the heat exchanger 8 when the flow velocity is high, and the noise is increased as wind noise.

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems, and has as its object to provide an air conditioner capable of suppressing Karman vortices and reducing wind noise.

Further, in the above-described conventional configuration, the positional relationship between the casing outlet and the vertical rectifying plate provided in the heat exchanger is deviated due to variations in the assembly of the air conditioner body and parts, and the effect of suppressing Karman vortices is reduced. And the effect of reducing wind noise is reduced.

Another object of the present invention is to reduce the wind noise by suppressing Karman vortices even when there are assembly variations.

[0012] Further, the above-mentioned conventional structure is characterized in that when the distance between the guide provided in the casing outlet and the heat exchanger is short,
In addition, when the blowing velocity is high, such as when the blowing air volume increases, the vertical flow near the heat exchanger becomes non-uniform, and the heat exchanger capacity cannot be sufficiently exhibited.

Another object of the present invention is to make the distribution of the flow flowing into the heat exchanger uniform and to sufficiently exert the heat exchanger capacity.

[0014]

In order to achieve this object, according to the present invention, at least one pair of vertical rectifying plates having a width of not less than the air outlet width is provided in the heat exchanger in front of the outlet of the casing in the same direction as the fin direction of the heat exchanger. It is provided in the direction.

This makes it possible to suppress Karman vortices generated at the fins constituting the heat exchanger.

In the present invention, one or more pairs of detachable vertical rectifying plates are detachably attached to the fin tubes constituting the heat exchanger.

Thus, even if there is an assembly variation, Karman vortices can be suppressed and wind noise can be reduced.

Further, in the present invention, one or more pairs of detachable vertical rectifying plates are provided on a fin tube constituting the heat exchanger, and a plurality of horizontal rectifying plates are provided in parallel with the fin tubes.

Thus, the distribution of the flow flowing into the heat exchanger can be made uniform, and the heat exchanger capacity can be sufficiently exhibited.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. The same components as those in the related art are denoted by the same reference numerals, and detailed description is omitted.

(Embodiment 1) FIG. 1 is a cross-sectional view of an air conditioner according to Embodiment 1 of the present invention, and FIG. 2 is a longitudinal sectional view of a main part of a blower blower. FIG. 3 is a partial perspective view between the blower outlet and the heat exchanger.

1 and 2, reference numeral 1 denotes an air conditioner main body, and reference numeral 2 denotes a suction grill for taking indoor air into the air conditioner main body 1. Reference numeral 5 denotes a multi-blade fan for blowing air, and reference numeral 6 denotes a casing having an inlet and an outlet for the multi-blade fan 5. Reference numeral 7 denotes a guider provided on the outlet side of the casing 6, and comprises a horizontal guider 7a for deflecting a vertical flow and a vertical guider 7b for deflecting a horizontal flow. Reference numeral 8 denotes a heat exchanger that exchanges heat with indoor air to perform cooling and heating. Reference numeral 9 denotes an outlet for blowing out the heat-exchanged air into the room again.

As shown in the partial perspective view of FIG. 3, the heat exchanger 8 opposed to the outlet side of the casing 6 is provided with one or more pairs of vertical rectifying plates in the same direction as the fin direction of the heat exchanger 8 as shown in FIG. It is provided.

The operation of the air conditioner configured as described above will be described below.

First, the room air flows into the air conditioner main body 1 from the suction grill 2 and is blown toward the heat exchanger 8 from the outlet of the casing 6 by the rotation of the multi-blade fan 5. At this time, the flow blown by the plurality of horizontal guiders 7a and the vertical guiders 7b of the guider 7 provided on the outlet side of the casing 6 is deflected in the vertical and horizontal directions with respect to the heat exchanger 8. Then, the flow that flows obliquely to the fins of the heat exchanger 8 near the inlet side of the heat exchanger 8 is caused to flow between the fins of the heat exchanger 8 by the vertical rectifying plate 11 provided in the heat exchanger 8. Deflected the wind and passed through the heat exchanger 8,
The heat-exchanged air is blown back into the room via the blow-out port 9.

As described above, the air conditioner of the present embodiment can prevent the flow obliquely flowing near the fins on the inlet side of the heat exchanger 8, thereby suppressing Karman vortices generated at the fins of the heat exchanger 8. it can.

(Embodiment 2) FIG. 4 is a perspective view of an essential part of an air conditioner according to Embodiment 2 of the present invention.

In FIG. 4, reference numeral 8a denotes a fin tube constituting the heat exchanger 8. Reference numeral 12 denotes a detachable vertical rectifying plate which can be attached to and detached from the fin tubes 8a of the heat exchanger 8.

In the present embodiment, the vertical rectifying plate 11 of the air conditioner according to the first embodiment is replaced with a detachable vertical rectifying plate 12 so as to be movable on the heat exchanger 8.

The operation of the air conditioner configured as described above will be described below with reference to FIGS.

The outlet flow discharged from the outlet of the casing 6 is deflected forward and backward and left and right by a guider 7, and the flow obliquely flowing in the vicinity of the heat exchanger 8 is removed by the desorption rectifying plate 1.
2 to ensure prevention. Then, the air having passed through the heat exchanger 8 and having undergone the heat exchange blows back into the room through the outlet 9.

As described above, in the air conditioner of the present embodiment, the detachable vertical rectifier plate 12 is detachable, so that even if there is a variation in the assembly of the blower side casing 6 and the heat exchanger 8, the detachable vertical rectifier plate can be removed. Since the positional relationship between the plate 12 and the outlet of the casing 6 can be maintained, Karman vortices generated near the heat exchanger 8 can be suppressed.

(Embodiment 3) FIG. 5 is a partial perspective view of an air conditioner according to Embodiment 3 of the present invention. FIG. 6 is an assembled perspective view of the same embodiment.

In FIG. 5, reference numeral 12a denotes a detachable vertical rectifying plate which can be attached to and detached from the heat exchanger 8, and 13 denotes a detachable vertical rectifying plate 12a.
It is a horizontal rectifying plate fitted in the.

In this embodiment, the air conditioner according to the second embodiment is further provided with a horizontal rectifying plate 1
3 is provided.

The operation of the air conditioner configured as described above will be described below with reference to FIGS. 2, 5 and 6.

The outlet flow discharged from the outlet of the casing 6 is deflected back and forth and left and right by the guider 7, and the outlet flow in the vicinity of the heat exchanger 8 can be prevented from flowing obliquely by the detachable vertical rectifying plate 12a. Further, the heat exchanger 8 is provided by a horizontal rectifying plate 13 provided on the detachable vertical rectifying plate 12a.
The air flow is deflected in the vertical direction through the heat exchanger 8, and the heat-exchanged air is blown back into the room through the air outlet 9.

As described above, in the air conditioner of the present embodiment, Karman vortices generated near the heat exchanger 8 can be suppressed by the detachable vertical rectifying plate 12a. Also, the horizontal rectifying plate 13
To deflect the flow in the vertical direction of the heat exchanger 8 in the wind direction.
Thereby, the distribution of the blowing air velocity of the heat exchanger 8 can be made uniform.

[0039]

As described above, the present invention provides a multi-blade fan for blowing air, a casing having a suction port and an air outlet for accommodating the multi-blade fan, and a heat exchanger in front of the air outlet of the casing. A multi-fin heat exchanger comprising a multi-fin tube and a heat exchanger comprising at least one pair of vertical rectifying plates provided in the heat exchanger facing the outlet of the casing in the same direction as the fin direction. Since the flow obliquely flowing near the fins of the exchanger can be prevented and the Karman vortex generated at the fins can be suppressed, the wind noise can be reduced.

Further, since the detachable vertical rectifying plate is detachably attached to the multi-fin tube of the heat exchanger, assembly variations between the casing, which is an air outlet, and the heat exchanger, and an increase in air volume are reduced. Even so, the positional relationship between the casing and the detachable vertical rectifying plate can be adjusted, so that the flow obliquely flowing near the fins of the heat exchanger can be prevented, and the generation of Karman vortices can be suppressed, so that the wind noise is reliably reduced. it can.

Further, by providing a plurality of horizontal rectifying plates parallel to the multi-fin tubes of the heat exchanger on the detachable vertical rectifying plate, a flow obliquely flowing near the fins of the heat exchanger can be prevented. The generation of Karman vortices can be suppressed, and the distribution of intake air velocities in the upper and lower stages of the heat exchanger becomes uniform, so that wind noise can be reduced, heat exchange performance can be improved, and downsizing can be achieved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an air conditioner according to Embodiment 1 of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of the air conditioner of the embodiment.

FIG. 3 is a partial perspective view between the blower outlet and the heat exchanger of the embodiment.

FIG. 4 is a partial perspective view between a blower outlet and a heat exchanger according to a second embodiment of the present invention.

FIG. 5 is a partial perspective view between a blower outlet and a heat exchanger according to a third embodiment of the present invention.

FIG. 6 is an assembled perspective view of the current plate of the embodiment.

FIG. 7 is a cross-sectional view of a conventional air conditioner.

FIG. 8 is a cross-sectional view of a main part of the conventional air conditioner.

[Explanation of symbols]

 Reference Signs List 5 multi-blade fan 6 casing 8 heat exchanger 8a fin tube 11 vertical rectifying plate 12, 12a detachable vertical rectifying plate 13 horizontal rectifying plate

Claims (3)

[Claims] 1. A multi-blade fan for blowing air, a casing having a suction port and an air outlet and accommodating the multi-blade fan, and a multi-fin and multi-fin tube for heat exchange in front of the air outlet of the casing. An air conditioner comprising: a heat exchanger having a pair of vertical rectifying plates provided in the heat exchanger facing an outlet of the casing in the same direction as the fin direction. 2. The air conditioner according to claim 1, wherein a detachable vertical rectifying plate is detachably attached to the multi-fin tube of the heat exchanger. 3. The air conditioner according to claim 1, wherein a plurality of horizontal straightening plates are provided on the detachable vertical straightening plate in parallel with the multi-fin tubes of the heat exchanger.