JPH10220798A - Indoor unit of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indoor unit of an air conditioner in which a spiral flow is prevented from being produced when a suction flow passes through a suction grill, and ventilation resistance is restricted to secure a smooth flow for reduction of fan air noise and the improvement of air fan performance, and further internal shielding effect is ensured with a suction grill. SOLUTION: There are provided a unit body in which there are provided in a front surface thereof a suction inlet for introducing and guiding air in a room to be air conditioned and a blowoff outlet at a lower portion of the suction inlet for blowing and guiding heat exchanging air, a suction grill provided across the suction inlet, and a plurality of lateral grids 20 constituting the suction grill and having a predetermined spaces mutually vertically, each grid being extended horizontally. The lateral grids are disposed slantingly having its cross sectional configuration a wall thickness of which is gradually increased from a rear end part 20b to a front end part 20a and which is circular arc shaped at the front end.

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 improvement in the shape and structure of a horizontal lattice constituting a suction grill.

[0002]

2. Description of the Related Art An air conditioner generally used includes an indoor unit arranged in a room to be air-conditioned and an outdoor unit arranged outdoors. These units are connected to each other by a refrigerant connection pipe and electric wiring. Become.

[0003] In particular, in an indoor unit, a suction port for introducing and guiding air to be conditioned to the inside of the unit body is provided on the front surface of the unit body, and a heat exchanger in the unit body is provided below the suction port. An outlet for blowing and guiding the heat exchange air after the heat exchange is provided.

[0004] A suction grill is provided at the suction port to shield devices such as a heat exchanger and a blower housed in the unit main body so that they cannot be seen from the outside, and to smoothly suction air. ing.

[0005] This suction grill has a plurality of horizontal grids which are spaced apart from each other by a predetermined distance in the vertical direction, and each of which extends horizontally. These horizontal lattices are formed over almost the entire length in the width direction (horizontal direction) of the unit main body, and since the unit main body itself has a horizontally long shape, reinforcing longitudinal members are provided at appropriate intervals.

FIG. 4 shows a conventional configuration (for example, actual fair 3-1).
No. 1622) is shown. These horizontal lattices A extend in the horizontal direction and parallel to each other.
Each horizontal lattice A is a plate body a that is inclined forward and upward.
And a rising portion b rising upward at the front end of the plate body a.
Are integrally formed.

As a result, the suction flow sucked into the suction port becomes a flow flowing obliquely downward from the front. That is, even if the outlet is provided near the inlet, the outlet flow is not induced by the inlet flow, and there is no short circuit.

The presence of the rising portion b is more effective in preventing a short circuit without significantly reducing the opening area of the suction grille, and serves to shield the inside.

[0009]

The suction grille is made of a synthetic resin such as polystyrene, for example, and is usually manufactured by injection molding after manufacturing a mold.

[0010] That is, the suction grille has a cross-section that is planarized due to the structure of the mold. Therefore, an intersection between the front end of the plate body a and the lower end of the rising portion b is formed at an obtuse angle.

Actually, a part of the suction flow guided from the front of the suction grill collides with the rising portion b in the horizontal lattice A, and then flows from the lower end along the lower surface of the plate a. At this time, since the intersection between the lower end of the rising portion b and the front end of the plate body a is formed at an obtuse angle, a plurality of small eddies are likely to be generated on the lower surface of the front end of the plate body a as shown in the figure. .

These vortices cause airflow noise, hinder quiet operation, and also serve as airflow resistance to the suction flow, adversely affecting airflow performance. The present invention has been made in view of the above circumstances, and an object thereof is to prevent the generation of a vortex when the suction flow passes through the suction grille, to suppress the ventilation resistance, and to achieve a smooth flow. It is an object of the present invention to provide an indoor unit of an air conditioner that can secure a reduction in ventilation noise and an improvement in ventilation performance by securing the same, and secure an internal shielding effect by a suction grill.

[0013]

In order to satisfy the above object, the indoor unit of the air conditioner according to the present invention has a suction port for introducing and guiding the air to be air-conditioned indoor at the front thereof. A unit body having a blow-out port for blowing and exchanging heat exchange air at a position below the suction port, a suction grill provided at the suction port, and a predetermined gap in the up-down direction that constitutes the suction grill; and A plurality of horizontal grids each extending in the horizontal direction, wherein the horizontal grids are arranged at an angle, and the cross-sectional shape thereof gradually increases in thickness from the rear end to the front end. And is formed in an arc shape at the front end.

According to a second aspect of the present invention, in the indoor unit of the air conditioner according to the first aspect, the horizontal lattice is formed such that a vertical gap is smoothly and gradually enlarged from a front side to a rear side. Features.

By providing the means for solving the above problems, according to the first aspect of the present invention, the suction flow of the air-conditioned room colliding with the horizontal grid is extremely smoothly along the upper and lower surfaces of the horizontal grid. As a result, there is no eddy current, the ventilation resistance is reduced, and the blowing noise can be reduced.

According to the second aspect of the present invention, the flow velocity of the suction flow flowing between the horizontal lattices is increased, and a sufficient amount of suction air is secured, so that the blowing performance can be improved. In addition, a shielding effect on the accommodation device inside the unit main body is obtained, and the appearance is improved.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described.
This will be described with reference to the drawings. As shown in FIG. 1, an indoor unit of the air conditioner is configured. The unit main body 1, which is the air conditioner main body, includes a front panel 2 and a rear plate 3. On the front side of the front panel 2, a front suction port 2a provided with a suction grill 4 described later is opened, and on the upper surface, an upper suction port 2b provided with an auxiliary suction grill 5 is provided.
Is opened.

Each of the suction ports 2a, 2
An air filter (not shown) bent in a gentle arc so as to face the area b and an indoor heat exchanger 7 formed in an inverted V shape are arranged.

The indoor heat exchanger 7 comprises a first heat exchanger section 7A facing the suction port 2a and a second heat exchanger section 7B facing the upper suction port 2b.
It is formed in a character shape.

The first heat exchanger section 7A is formed in an arc shape and is arranged on the front side. The second heat exchanger section 7B
Is a heat exchanger part 7b1 which is arranged on the rear side and is formed in a straight shape.
And an auxiliary heat exchanger 7b2 arranged in parallel on the upper side of the heat exchanger section.

A front drain pan 8a is arranged below the first heat exchanger section 7A, and a rear drain pan 8b is arranged below the second heat exchanger section 7B. The front and rear drain pans 8a and 8b are provided integrally with the rear plate 13.

The heat exchangers are disposed inside the indoor heat exchanger 7 formed in an inverted V-shape, that is, between the first heat exchanger 7A and the second heat exchanger 7B. The indoor blower 9 is arranged so as to be covered by the air.

In the rear plate 3, an air passage 10 is formed below the rear drain pan 8b, and an outlet 11 is opened in a lower part of the front panel 2 communicating with the air passage. The front drain pan 8a is provided along the front end of the outlet 11, and the rear drain pan 8b is provided along the upper side of the air passage 10. The outlet 11 is provided with an outlet louver 12 having two blades.

As shown in FIG. 2, the front panel 2 has an arc-shaped cross section. A bar 13 is provided at an upper end of the front panel 2, and a pivot arm 14 projecting rearward is provided. Are provided, and are rotatably supported on the rear plate 3.

That is, the front panel 2 has the upper end of the rear plate 3 as a fulcrum, and the lower end thereof is rotatable in the front-rear direction.
The interior of the unit main body 1 can be opened as necessary, for example, during maintenance of housed equipment such as the indoor heat exchanger 7 and the blower 9.

The suction grille 4 is provided over most of the front panel 2 below the upper cross section 13. On the lower side of the suction grille 4, a frame portion 16 that forms the suction port 11 via a crosspiece 15 is provided.

As shown in FIG. 3, the suction grille 4 is connected to a plurality of horizontal grids 20 which have a predetermined gap in the vertical direction and extend in the horizontal direction. And the longitudinal ridge 21.

The horizontal lattice 20 is arranged obliquely, and its cross-sectional shape is changed from the rear end 20b to the front end 20b.
The thickness gradually increases over a, and is formed in an arc shape at the front end portion 20a. The horizontal lattice 20 is formed so that the vertical gap S is smoothly and gradually enlarged from the front side to the rear side.

The indoor unit constructed as described above performs air conditioning operation such as cooling operation, heating operation or dry operation, and the air to be conditioned is sucked into the unit body 1 through the suction port 2a. It is.

At this time, a part of the suction flow of the air to be conditioned collides with the suction grill 4 provided in the suction port 2a. More specifically, a part of the suction flow collides with the horizontal grids 20 that constitute the suction grille 4 and flows along the lower surface of the horizontal grid. Another part of the air flows along the upper surface of the horizontal grids 20, flows through the gaps S between the upper and lower horizontal grids 20, and is guided directly into the unit body 1.

As described above, the cross section of the horizontal lattice 20 is gradually increased in thickness from the rear end portion 20b to the front end portion 20a, and is formed in an arc shape at the front end portion 20a.

First, the suction flow colliding with the front end 20a of the horizontal lattice 20 flows along the upper and lower surfaces of the horizontal lattice very smoothly along the circular arc cross section of the horizontal lattice, and no vortex is generated. Resistance decreases. Therefore, there is no generation factor of the blowing noise, and the blowing noise can be reduced.

At the same time, since the gap S between the upper and lower horizontal grids 20 is formed so as to smoothly and gradually expand from the front side to the rear side, the flow velocity of the suction flow flowing between these horizontal grids 20 increases, A sufficient amount of intake air is guided into the unit body 1. Therefore, the intake air amount is secured, and the air blowing performance can be improved.

In addition, with such a shape of the horizontal grid 20, the horizontal grill 2 is used as a mold for manufacturing the suction grill 4.
By setting the lower surface side from the front end portion 20a to the rear end portion 20b of the 0 as the mold side and the upper surface side as the core side, the die can be easily removed, which is advantageous in man-hour.

The horizontal lattice 20 secures a shielding effect on the indoor heat exchanger 7 and the blower 9 which are accommodation devices inside the unit main body 1, and is excellent in appearance and design, and can improve appearance.

[0036]

As described above, according to the first aspect of the present invention, the horizontal grille constituting the suction grille is arranged at an angle, and its sectional shape is gradually increased from the rear end to the front end. The air-conditioned room that collides with the horizontal grid flows extremely smoothly along the upper and lower surfaces of the horizontal grid, and there is no vortex generated, reducing ventilation resistance. As a result, an effect of obtaining a reduction in blowing noise can be obtained.

According to the second aspect of the present invention, the horizontal lattice is formed so that the vertical gap gradually and gradually increases from the front side to the rear side, so that the flow velocity of the suction flow flowing between the horizontal lattices is increased. In addition, a sufficient amount of intake air is ensured to improve the air blowing performance, and the housing equipment inside the unit main body is shielded, so that the external appearance and the design are excellent and the effect of improving the appearance is exhibited.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an indoor unit of an air conditioner, showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a front panel constituting the unit main body, showing the embodiment.

FIG. 3 is a partial vertical cross-sectional view of the suction grill, showing the embodiment.

FIG. 4 is a partial longitudinal sectional view of a conventional suction grill.

[Explanation of symbols]

 2a: inlet, 11: outlet, 1: unit body, 4: grill, 20: horizontal grid, 20b: rear end of horizontal grid, 20a: front end of horizontal grid, S ... (up and down) Gaps between the horizontal grids.

Claims (2)

[Claims] A unit body provided with a suction port for introducing and guiding air to be air-conditioned to the front, and a blow port for blowing and guiding heat exchange air below the suction port; and a unit provided at the suction port. Suction grille, and a plurality of horizontal grids constituting the suction grille, each having a predetermined gap in the vertical direction and each extending in the horizontal direction, wherein the horizontal grids are arranged obliquely. An indoor unit for an air conditioner, wherein the cross-sectional shape gradually increases in thickness from the rear end to the front end and is formed in an arc shape at the front end. 2. The indoor unit of an air conditioner according to claim 1, wherein the horizontal lattice is formed so that a gap in a vertical direction is smoothly and gradually enlarged from a front side to a rear side.