JPH08128661A - Suction air flow regulating device for air conditioner - Google Patents

Abstract

PURPOSE: To provide a suction air flow regulating device for an air conditioner in which suction air flowing into an indoor device is regulated to reduce occurrence of noise and a heat exchanging efficiency can be increased. CONSTITUTION: In the case that an air conditioner is constructed such that a housing 2 of an indoor device 1 is provided with an air suction port 5 and an air discharging port 7, a heat exchanger 3 is arranged in a substantially vertical manner at the air suction port 5 and in turn an indoor fan 8 is arranged in an air flow passage 6 at the lower part of the heat exchanger 3, a plurality or flow regulating plates 4a to 4d with a width substantially equal to a lateral width of the heat exchanger 3 and with different lengths are arranged with a predetermined spacing in a vertical direction with respect to the heat exchanger 3. Then, each of the flow regulating plates 4a to 4d is set at such an angle in which the air suction flow passage 6 ranging from the rear surface side of the heat exchanger 3 to the indoor fan 8 shows a substantially equal distance for each of the flow regulating plates.

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, and more particularly to an intake air rectifying device of an air conditioner for rectifying intake air passing through a heat exchanger of the indoor unit.

[0002]

2. Description of the Related Art In an air conditioner installed in a general household, a popular small-sized cooler or a heat pump type air conditioner has a heat exchanger 3 in an outer box 2 of an indoor unit as shown in FIG.
A general configuration is one in which the indoor blower fan 8 and the like are arranged. Further, the outer box 2 of this indoor unit has an intake port 5 in the upper half of the front panel 2a and an exhaust port 7 in the lower side.
An air passage 6 is formed by partitioning the space with a partition wall 10.

A heat exchanger 3 is installed upright on the intake port 5 side, and a filter 12 is provided in front of the heat exchanger 3.
On the other hand, the indoor blower fan 8 is arranged in the ventilation passage 6 in proximity to the lower end on the back side. In addition, 11a is a drain pan which receives the dew condensation falling from the heat exchanger 3.

However, in the air conditioner, when the cooling operation is started, the indoor blower fan 8 is driven to rotate and the intake port 5 is moved.
The air in the room is inhaled from. This intake air passes through the filter 12 and the heat exchanger 3 and is guided to the ventilation path 6 as shown by the arrow in FIG. At this time, heat is exchanged in the heat exchanger 3 and the heat of the ventilation is taken away, so that the temperature of the indoor air is lowered and becomes cold air which is blown again to the indoor side.

[0005]

By the way, in the above-mentioned conventional air conditioner, since the indoor blower fan 8 is arranged at the lower end of the ventilation passage 6 at the lower end of the heat exchanger 3, it flows in from the intake port 5. The flow velocity of the intake air greatly differs between the upper side and the lower side of the heat exchanger 3. That is, the flow velocity of the intake air becomes faster as it approaches the indoor blower fan 8 and becomes gradually slower as it gets farther. Therefore, the airflow is disturbed in the ventilation passage 6 extending in the vertical direction, and noise causing discomfort is generated.

Further, in the heat exchanger 3, the refrigerant flows from the upper side to the lower side of the tube 3a, but the flow velocity of ventilation is large between the upper side and the lower side of the heat exchanger 3. Because of the difference, the temperature of the upper side where the flow velocity is slow does not drop, and the lower side where the flow velocity is fast becomes low temperature. Then
Since a temperature difference occurs in the entire heat exchanger 3, the degree of heat removal is different, and the problem remains that the heat exchange efficiency is reduced.

The present invention has been made in view of the above problems, and provides an intake air rectifying device for an air conditioner which can rectify the intake air to the indoor unit to reduce the generation of noise and enhance the heat exchange efficiency. Is intended.

[0008]

In order to achieve the above-mentioned object, the present invention provides an indoor unit housing with an intake port and an exhaust port through a ventilation passage, and a heat exchanger is provided on the intake port side. In an air conditioner in which an indoor fan is arranged in a ventilation path on the lower side of the heat exchanger while being arranged substantially vertically, a plurality of straightening plates having different lengths that are substantially equal to the width of the heat exchanger are provided. The heat exchangers are arranged at a predetermined interval in the vertical direction, and each of the straightening vanes is set to an angle such that the intake passages from the rear side of the heat exchanger to the indoor fan have substantially equal distances. It has a feature.

[0009]

In the present invention, when the indoor fan is rotated, the air is sucked from the intake side, passes through the heat exchanger and the plurality of rectifying plates, and is discharged from the exhaust port through the ventilation passage. Here, each straightening plate is formed to have a width substantially equal to that of the heat exchanger, so that the suction air passing through the heat exchanger is straightened. In addition, the length of each straightening plate is different,
Since the intake passages from the back side of the heat exchanger to the indoor fan are set to have an angle that is substantially equal, the air passage speeds in the upper and lower portions of the heat exchanger are substantially equal.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an indoor unit of an air conditioner according to the present invention, and FIG. 2 is a schematic configuration diagram of an intake air rectification device provided in the indoor unit.

The air intake rectifier of this air conditioner is applied to an indoor unit 1 in a popular type small cooler or a heat pump type air conditioner, and a heat exchanger () disposed in an outer box 2 of the indoor unit 1 ( The intake air rectification unit 4 is provided on the evaporator 3 side.

The outer box 2 is formed in a horizontally long rectangular shape, and an intake port 5 is opened in the upper half of the front panel 2a, and an exhaust port 7 is opened in the lower side. A grill is attached to the front panel 2a on the intake port 5 side. An upper support plate 9 is fixedly installed on the top plate 2c side of the outer box 2, and a curved partition wall 10 is provided between the upper support plate 9 and the bottom plate 2d along the rear panel 2b.

Further, a lower support plate 11 is horizontally fixed along the lower side of the front panel 2a, and a substantially U-shaped drain pan 11a is integrally formed on the lower support plate 11 in an inclined shape. Has been done.

The heat exchanger 3 has an upper end portion fixed to the upper support plate 9 side and a lower end portion fixed to the lower support plate 9 side inside the intake port 5, and is erected at a predetermined inclination angle. ing. Then, the filter 12 is provided on the front side of the heat exchanger 3.
While the intake air rectifying portion 4 is arranged on the back side.

A space between the back side of the heat exchanger 3 and the partition wall 10 constitutes a main part of an air passage 6 extending from the intake port 5 to the exhaust port 7. The air passage 6
An indoor blower fan 8 is disposed on the lower end side of the heat exchanger 3 in FIG.

This indoor blower fan 8 includes a fan motor 8
a and a fan guard 8b are fixedly provided on the lower support plate 11, and the indoor air is sucked from the intake port 5 by the rotational drive of the fan motor 8a, and the filter 12, the heat exchanger 3, the intake rectification unit 4, and the ventilation are provided. The air is discharged from the exhaust port 7 side toward the room through the passage 6. At this time, heat is exchanged in the heat exchanger 3 and the heat of the intake air is taken away, so that the temperature of the indoor air is lowered and becomes cold air, which is blown again to the indoor side and cooling is performed.

The intake rectifying section 4 includes four rectifying plates 4a to 4a.
4d is arranged on two left and right support frames 4e, 4f,
The upper end of each of the left and right support frames 4e and 4f is connected to the upper support plate 9
In addition, each lower end is fixed to the lower support plate 11. The first to fourth straightening vanes 4a to 4d are formed to have a horizontal width longer than that of the heat exchanger 3, but have different vertical widths. That is, the left and right support frames 4e, 4f
The uppermost first rectifying plate 4a fixed to the upper side of the plate has the narrowest width, and the fourth rectifying plate 4d fixed to the lowermost part has the widest width, and second and third intermediate rectifying plates 4b and 4c in the middle. Is gradually widened.

And, each of these straightening vanes 4a-4d is
The intake passages 1 reaching the indoor blower fan 8 from the rear side of the heat exchanger 3 are set to an angle such that they are substantially equal in distance, and fixed to the left and right support frames 4e and 4f so as to face upward. There is.

That is, since the indoor blower fan 8 is located on the lower end side of the heat exchanger 3, normally, the flow path 1 of the intake air which passes through the heat exchanger 3 and reaches the indoor blower fan l.
Is long on the upper side of the heat exchanger 3 and short on the lower side.
Therefore, a difference occurs in the flow velocity of the intake air passing through the heat exchanger 3, which causes noise and reduces the heat exchange efficiency.

In this example, the first to fourth straightening vanes 4a to 4 are provided.
d is fixed at an inclination angle with the tip facing upward,
As shown in FIG. 3, the fourth straightening vanes 4d closest to the indoor blower fan 8 have the longest vertical width, and the farthest first straightening vanes 4a have the shortest vertical width, and are divided by these straightening vanes 4a to 4d. The intake passages l1 to l4 are set to substantially equal distances.

However, when the operation of the air conditioner equipped with the intake air rectifying device is started, the indoor blower fan 8 is rotationally driven to suck the indoor air from the intake port 5 side, and as shown by the arrow in the figure, It is introduced into the ventilation passage 6 via the filter 12 and the heat exchanger 3. Then, after the intake air that has passed through the heat exchanger 3 is directed to the upper side of the ventilation passage 6 by the four straightening vanes 4a to 4d, it is guided to the lower side of the ventilation passage 6, passes through the indoor blower fan 8, and is exhausted. It is discharged from the mouth 7.

In this intake air circulation process, the horizontal width of each of the straightening vanes 4a to 4d is substantially equal to that of the heat exchanger 3, and the vertical width also has a required length, and they are oriented in the same direction. Therefore, the intake air is rectified when passing through the heat exchanger 3. Therefore, since the turbulence of the air flow is suppressed,
Noise generation is greatly reduced.

Further, since the lengths of the straightening vanes 4a to 4d are made different and the inclination angle is set in advance to make the intake flow passages 1 have substantially equal distances, not only the upper and lower portions of the heat exchanger 3 but also any portion. Also in, the passing speed of the intake air becomes almost equal.

Therefore, heat is taken away from the entire surface of the heat exchanger 3 of this type in which the refrigerant flows from the upper side to the lower side of the tube 3a, and heat is generated in the upper and lower portions of the heat exchanger 3 as in the conventional case. The problem of different exchange efficiencies is mitigated and efficient heat exchange is performed.

In the above embodiment, the case where the invention is applied to a small air conditioner or a heat pump type air conditioner has been described, but it goes without saying that it can be applied to a package type air conditioner or the like.

[0026]

According to the present invention, since the suctioned air passing through the heat exchanger can be rectified by the plurality of rectifying plates, it is possible to greatly reduce the conventional noise generation due to the turbulence of the air flow. . In addition, since the speed of the suction air passing through the heat exchanger can be kept almost equal at any part, the problem that the heat exchange efficiency is different between the upper and lower parts of the heat exchanger is mitigated, and efficient heat exchange is achieved. There is an effect that it can be achieved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an indoor unit of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of an intake air rectification device provided in the indoor unit.

FIG. 3 is an explanatory diagram showing an intake rectification state of the intake rectification device.

FIG. 4 is a cross-sectional view showing an indoor unit of a conventional air conditioner.

[Explanation of symbols] 1 indoor unit 2 housing 3 heat exchanger 4a to 4d straightening plate 5 intake port 6 ventilation path 7 exhaust port 8 indoor fan l intake path

Claims (1)

[Claims] 1. An indoor unit housing is provided with an intake port and an exhaust port through a ventilation path, and a heat exchanger is arranged substantially vertically on the intake port side, while a lower side of the heat exchanger is provided. In the air conditioner in which the indoor fan is arranged in the ventilation passage, a plurality of straightening vanes having a length substantially equal to the width of the heat exchanger and different in length are arranged at predetermined intervals in the vertical direction of the heat exchanger. Then, each of the straightening vanes is set to an angle such that the intake air passages from the back side of the heat exchanger to the indoor fan have substantially equal distances.