JP2000121091A - Indoor unit of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indoor unit of a sanitary air conditioner wherein a blowoff outlet upper portion is prevented from being condensed and flexibility of a design is improved without using an unwoven fabric and a heat insulation material. SOLUTION: An indoor unit 1 includes a bypass flow passage 10 for guiding part of blowoff air from an air fan 5 from an inlet 13 provided in an upper portion of a blowoff outlet passage 9 up to an outlet 14 on an upper side from a blowoff outlet 12 of a front grill 6. A lower side portion from the outlet 14 of the bypass flow passage 10 of the front grill 6 is enclosed with cold air flowing through the blowoff outlet passage 9 and cold air blown off from the outlet 14 of the bypass flow passage 10. Hereby, indoor air taken into the side of the blowoff outlet 12 along the front panel 7 is obscured from making contact with an exposed portion 6b of the front grill 6 so that the exposed portion 6b of the front grill 6 is prevented from being condensed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an indoor unit of an air conditioner.

[0002]

2. Description of the Related Art Conventionally, there is an indoor unit of an air conditioner as shown in FIG. This indoor unit 2
Reference numeral 1 denotes a casing 22 provided with an air outlet 32 at a lower portion of a front surface, a heat exchanger 23 disposed on the front side in the casing 22, and a heat exchanger 23 disposed inside the casing 22 below the heat exchanger 23. Drain pan 24 and casing 2
Blower 2 disposed on the rear side of heat exchanger 23
5 is provided. Heat exchanger 23 of casing 22
A front grille 26 is mounted on the front side of the front grille, and a front panel 27 is mounted on the front side of the front grille 26. The drain pan 24 has a guide portion 24a extending forward to near the lower end of the front panel 27,
The nonwoven fabric 28 is attached to the tip of the guide portion 24a.

[0003] The indoor unit 21 of the air conditioner having the above configuration.
In the cooling operation, the indoor air sucked by the blower fan 25 from the front side through the plurality of ventilation holes 31 provided in the front grill 26 during the cooling operation is heat-exchanged by the heat exchanger 23, Outlet passage 2 provided on the side
9 and is blown into the room from the blowout port 32. The non-woven fabric 28 attached to the distal end of the guide portion 24a of the drain pan 24 prevents dew condensation occurring at the distal end portion of the guide portion 24a, absorbs dew condensation generated at the guide portion 24a, and forms dew condensation inside the room. Try not to scatter.

[0004] In place of the non-woven fabric 28, there is also a type using a heat-insulating material subjected to a flocking process.

[0005]

However, in the indoor unit 21 of the air conditioner, the nonwoven fabric 28 is required at the tip of the guide portion 24a in order to prevent dew condensation.
There is a problem that costs increase. In addition, nonwoven fabric 2
8 is exposed to the outside, and the design is limited due to restrictions on the color and shape. In addition, there is a problem that mold is generated or dust adheres to the nonwoven fabric 28 that has absorbed the dew condensation, so that the upper part of the outlet 32 becomes unsanitary and the appearance is impaired.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a sanitary air conditioner indoor unit which can prevent dew condensation at the upper portion of an air outlet at a low cost without using a non-woven fabric or a heat insulating material and can increase the degree of freedom in design. Is to do.

[0007]

In order to achieve the above object, an indoor unit of an air conditioner according to the present invention is provided with a casing, a blower fan disposed in the casing, and a lower side of the casing. An outlet passage that guides air blown from the blower fan and blows out from an outlet on the front side of the casing, a front grill attached to the front side of the casing, and an inlet provided at an upper portion of the outlet passage. An outlet provided above the outlet of the front grill at a predetermined distance from an upper edge of the outlet, and a portion of air blown from the blower fan is supplied from the inlet of the blow passage through the inlet. A bypass passage for guiding to the outlet of the front grille.

According to the indoor unit of the air conditioner of the first aspect, during the cooling operation, the air sucked from the front side through the front grill by the blower fan is cooled and dehumidified by the blower fan, and then the air is passed through the outlet passage. It passes through the outlet and is blown into the room. At this time, a part of the cool air passing through the outlet passage enters the bypass passage from the inlet provided at the upper part of the outlet passage, and a predetermined distance from the upper edge of the outlet above the outlet of the front grille. Blows out from the exit provided. In this way, the portion below the outlet of the bypass passage of the front grill is surrounded by the cool air flowing through the outlet passage and the cool air blown from the outlet of the bypass passage of the front grill. Therefore, no indoor air comes into contact with a portion below the outlet of the bypass passage of the front grill, and no dew condensation occurs on a portion below the outlet of the bypass passage of the front grill, that is, at the upper portion of the outlet. . Therefore, the indoor unit of the air conditioner can prevent the dew condensation at the upper portion of the outlet at low cost without using a nonwoven fabric or a heat insulating material, and can increase the degree of freedom in design.
The upper part of the outlet can be kept clean.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an indoor unit of an air conditioner according to the present invention will be described in detail with reference to the illustrated embodiments.

FIG. 1 is a sectional view of an indoor unit of an air conditioner according to an embodiment of the present invention. In FIG. 1, the upper part of the indoor unit 1 of the air conditioner is not shown. The indoor unit 1 of the air conditioner includes a casing 2 provided with an air outlet 12 at a lower portion of a front surface, a heat exchanger 3 disposed on a front side in the casing 2, and a heat exchanger in the casing 2. 3, a drain pan 4 disposed below the heat exchanger 3 in the casing 2, and a blower fan 5 disposed below the casing 2 and provided from the blower fan 5. An outlet passage 9 for guiding air to be blown out from an outlet 12 on the front side of the casing 2 is provided. In addition, the casing 2
A front grille 6 having a plurality of ventilation holes 11 is mounted on the front side of the heat exchanger 3, and a front panel 7 is mounted on the front side of the front grille 6. The horizontal blade 1 for controlling the airflow of the blown wind is provided on the blowout port 12 side of the blowout passage 9.
5 are arranged.

The front grille 6 is provided with a bent portion 6a bent from the lower end and extending toward the upstream side. Also,
A bent portion 6a of the front grille 6 is provided below the drain pan 4.
And a protruding portion 4a extending substantially to the vicinity of the tip of the bent portion 6a. An inlet 13 is formed between the tip of the projection 4 a of the drain pan 4 and the tip of the bent portion 6 a of the front grille 6. On the other hand, an outlet 14 is formed above the upper edge of the outlet 12 of the front grille 6 by a plurality of slits arranged in a straight line at predetermined intervals in the direction perpendicular to the plane of FIG. Thus, between the drain pan 4 and the front grille 6, a bypass flow path 10 for guiding a part of the air blown from the blower fan 5 from the inlet 13 to the outlet 14 is formed.

According to the indoor unit 1 of the air conditioner having the above configuration, during the cooling operation, the indoor air sucked by the blower fan 5 from the front panel 7 side through the plurality of ventilation holes 11 of the front grill 6 during the cooling operation is heated. After heat exchange and dehumidification in the exchanger 3, the air is blown into the room from the air outlet 12 through the air outlet passage 9. At this time, part of the cool air flowing through the outlet passage 9 enters the bypass flow passage 10 from the inlet 13 between the bent portion 6a of the front grill 6 and the projection 4a of the drain pan 4, and the outlet 14 of the front grill 6 From the room. The cool air blown from the outlet 14 of the front grill 6 is drawn into the blow air from the blow outlet 12, and
Along the lower exposed portion 6b (see dotted arrow C in FIG. 1).

If there is no flow of cold air as indicated by a dotted arrow C in FIG.
The room air drawn into the side is exposed to the exposed portion 6 of the front grill 6.
b, the indoor air comes into contact with it, and dew condensation occurs on the exposed portion 6b of the front grille 6. More specifically, when room air containing a large amount of humidity comes into contact with the exposed portion 6b of the front grill 6 cooled by the cool air flowing through the outlet passage 9, the room air is cooled and becomes supersaturated. Exposed part 6
Dew forms on b.

However, in the indoor unit 1 of the air conditioner having the above-described configuration, the provision of the bypass passage 10 allows the cool air flowing through the outlet passage 9 and the cool air blown out from the outlet 14 of the bypass passage 10 of the front grille 6 to cool the air. The exposed portion 6b and the bent portion 6a of the front grill 6 are wrapped. Therefore, the room air (see the thick arrow W in FIG. 1) drawn into the air outlet 12 along the front panel 7 does not contact the exposed portion 6b of the front grill 6, so that the front grill 6
No dew condensation occurs on the exposed portion 6b, that is, on the upper portion of the air outlet 12.

[0015] Therefore, the indoor unit 1 of the air conditioner can use the outlet 1 without using a non-woven fabric or a heat insulating material.
(2) Dew condensation on the upper portion can be prevented, and the degree of freedom in design can be increased. In addition, since the nonwoven fabric and the heat insulating material having the mold are eliminated, the upper portion of the outlet 12 can be kept clean. In addition, since the step of attaching the nonwoven fabric or the heat insulating material and the heat insulating material can be omitted, the cost can be reduced.

In the above embodiment, the inlet 13 of the bypass passage 10 is formed between the tip of the bent portion 6a of the front grille 6 and the tip of the projection 4a of the drain pan 4, but the bent portion of the front grill and the drain pan are formed. May be provided with an inlet of the bypass flow path. That is, the inlet of the bypass passage may be provided in the upper part of the outlet passage. Further, the outlet of the bypass passage may be provided at a predetermined distance from the upper edge of the outlet above the outlet, and the shape of the outlet of the bypass passage is not limited to the above embodiment.

[0017]

As is clear from the above, the indoor unit of the air conditioner according to the first aspect of the present invention is provided with a casing, a blower fan disposed in the casing, and a lower side of the casing. An outlet passage that guides air blown from the blower fan and blows out from an outlet on the front side of the casing, a front grill attached to the front side of the casing, an inlet provided at an upper portion of the outlet passage, and the front grill An outlet provided above the outlet at a predetermined distance from the upper edge of the outlet, and a portion of the air blown from the blower fan is guided from the inlet of the outlet passage to the outlet of the front grille. And a bypass flow path.

Therefore, according to the indoor unit of the air conditioner of the first aspect of the present invention, the portion below the outlet of the bypass passage of the front grill is formed by the cool air flowing through the outlet passage and the bypass passage of the front grill. Since it is wrapped by the cool air blown out from the outlet, the room air does not come into contact with a portion below the outlet of the bypass passage of the front grill, and is a portion below the outlet of the bypass passage of the front grill. No condensation occurs at the top of the outlet. Therefore,
The indoor unit of the air conditioner can prevent dew condensation at the upper portion of the outlet at low cost without using a nonwoven fabric or a heat insulating material, can increase the degree of freedom of design, and keep the upper portion of the outlet clean. it can.

[Brief description of the drawings]

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

FIG. 2 is a sectional view of an indoor unit of a conventional air conditioner.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Indoor unit, 2 ... Casing, 3 ... Heat exchanger, 4
... Drain pan, 5 ... Blower fan, 6 ... Front grill, 7 ...
Front panel, 9: outlet passage, 10: bypass passage,
12 ... outlet, 13 ... inlet, 14 ... outlet.

Claims (1)

[Claims] 1. A casing (2), a blower fan (5) arranged in the casing (2), and a blower fan provided below the casing (2).
(5) Guides the air blown out from (5) and guides the casing (2)
An outlet passage (9) that blows out from an outlet (12) on the front side of the vehicle; a front grille (6) attached to the front side of the casing (2); and an inlet provided at the top of the outlet passage (9). (13), an outlet (14) provided at a predetermined distance from an upper edge of the outlet (12) above the outlet (12) of the front grill (6), and A bypass passage (10) for guiding a part of the air blown out from (5) from the inlet (13) of the outlet passage (9) to the outlet (14) of the front grill (6). An indoor unit of an air conditioner characterized by the above.