JP3794087B2 - Embedded ceiling indoor unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ceiling-embedded indoor unit.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an indoor unit that is a ceiling-embedded type that blows out air after heat exchange in four directions has a structure as shown in a longitudinal section in FIG.
In FIG. 6, the decorative panel 3 is fixed to the bottom of the casing 1 to cover the lower surface of the casing 1 and the gap between the casing 1 and the ceiling 2. And the suction inlet 4 is provided in the center part of the decorative panel 3, and the indoor air suck | inhaled from the suction inlet 4 with rotation of the air blower 5 is carried out by the heat exchanger 6 provided around the air blower 5. Heat exchanged. The air after heat exchange in this way is blown into the room from the air outlets 7 provided around the suction port 4 in the decorative panel 3. 8 is a drain pan.
[0003]
[Problems to be solved by the invention]
By the way, in airflow control by an air conditioner, there are problems such as discomfort when the wind directly hits the human body and whether the wind reaches near the floor during heating. Since this problem is mainly caused by the wind speed when the wind is blown downward, it is important to eliminate the difference in the blown wind speed depending on the capacity of the indoor unit. Therefore, in a ceiling-embedded indoor unit, the outlet for large horsepower (large airflow) is longer than the outlet for small horsepower (small airflow) so that there is no difference in the airflow speed depending on the capacity. is doing. Accordingly, it is necessary to use decorative panels having different sizes for large horsepower and small horsepower.
[0004]
For this reason, for example, when a 3 hp model and a 5 hp model are installed in the same office, there is a problem that the layout property is poor because the sizes of the decorative panels of both models are different.
Moreover, when manufacturing a ceiling-embedded indoor unit as described above, it is necessary to prepare the parts of the decorative panel according to the capabilities of 3 horsepower and 5 horsepower, which increases the number of parts.
[0005]
Accordingly, an object of the present invention is to provide a ceiling-embedded indoor unit that can improve the layout of a ceiling-embedded indoor unit having different capabilities and can reduce the cost by sharing parts of a decorative panel.
[0006]
[Means for Solving the Problems]
To achieve the above object, a ceiling embedded indoor unit of the invention according to claim 1, a casing body including outlet passage forming member having an air passage enlarged portion expanding toward the exit, the bottom of the casing body And an air outlet having a size substantially equal to the downstream end of the air passage enlarged portion, and an air stream line upstream of the upstream end of the air passage enlarged portion at the air outlet. A decorative panel having a fixed blade and a movable blade that are connected to each other is provided.
[0007]
The ceiling-embedded indoor unit configured as described above is a large-capacity (large air volume) unit, and the air flowing along the air passage enlarged portion provided in the outlet passage forming member in the outlet passage is fixed vanes at the outlet of the decorative panel. The air is blown out from both sides and the movable blades.
Here, the decorative panel is also used for a ceiling-embedded indoor unit having a small capacity (small air volume). And, in this small capacity ceiling-embedded indoor unit, the blowing passage forming portion is not provided with the blowing passage expanding portion, and the opening on one side of the fixed blade at the outlet of the decorative panel is closed. It has become. Therefore, the blown-out wind speed is increased, and a wind speed substantially the same as the blown-out wind speed of the large capacity indoor unit is obtained.
That is, the external dimensions of the decorative panel does not need to change in the indoor unit and the large-capacity indoor unit of small capacity, even at different ceiling-type indoor unit capable same decorative panel Ru is used.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.
FIG. 1 is a longitudinal sectional view of the vicinity of the air outlet (corresponding to portion A in FIG. 6) in a ceiling-embedded indoor unit as a reference example of the present embodiment.
[0009]
This ceiling-embedded indoor unit has a capacity of, for example, 3 horsepower (17 m ³ / min).
11 is a casing and 12 is a drain pan. A blowout passage 13 is formed by the inner wall surface 11 a of the casing 11 and the outer wall surface of the drain pan 12.
A decorative panel 15 is attached to the bottom of the casing 11 and the drain pan 12. And the blower outlet 15a of the said decorative panel 15 is connected with the blower passage 13 in the casing 11 smoothly. The air outlet 15a is curved inward, and the air from the air outlet 15a is slightly blown outward.
[0010]
In the blowout port 15a of the decorative panel 15, there are a fixed blade 17 having a straight plane and extending vertically in order from the outside, and a surface curved inward so that the orientation of this surface can be varied. A movable blade 18 is provided. A protruding member 19 that protrudes inward and smoothly communicates with the fixed blade 17 from the inner wall surface 11 a is provided on the inner wall surface 11 a at the lower portion of the casing 11.
[0011]
In the above configuration, the air descending along the inner wall surface 11 a of the casing 11 after heat exchange by the heat exchanger 14 is blown into the room along the surface of the protruding member 19 and the surface of the fixed blade 17. Accordingly, the actual opening width B of the air outlet 15a of the decorative panel 15 is the distance between the inner surface of the fixed blade 17 and the inner edge 15b of the opening of the air outlet 15a.
[0012]
By the way, in the airflow control by the air conditioner, as described above, it is important to eliminate the difference in the blown air speed depending on the capacity of the indoor unit. Then, by making the actual opening width of the air outlet 15a in the case of large horsepower (large airflow) larger than the actual opening width in the case of small horsepower (small airflow), the large horsepower can be increased without changing the length of the air outlet. The blowing air speeds of the indoor unit and the small horsepower indoor unit can be made substantially the same.
[0013]
FIG. 2 is a longitudinal sectional view of the vicinity of the air outlet in a ceiling-embedded indoor unit having a capacity of 5 horsepower (30 m ³ / min), for example.
In this 5-horsepower indoor unit, the inner wall surface 11a of the casing 11 is not provided with the protruding member 19 like the indoor unit shown in FIG. The decorative panel 15 has the same structure as the decorative panel 15 of the indoor unit shown in FIG.
In the 5-horsepower indoor unit having the above-described configuration, since the protruding member 19 is not provided on the inner wall surface 11a of the casing 11, it is lowered along the inner wall surface 11a of the casing 11 after heat exchange by the heat exchanger 14. The air to be blown out straight down.
[0014]
Therefore, the actual opening width A of the air outlet 15a in this 5-horsepower indoor unit is the distance between the inner wall surface 11a of the casing 11 and the inner edge 15b of the air outlet 15a of the decorative panel 15. The actual opening width A is larger than the actual opening width B in the three-horsepower indoor unit shown in FIG. That is, in the 5-horsepower indoor unit shown in FIG. 2, air is also blown out from between the casing body 11 and the fixed vane 17 and is almost the same as the blown-out air speed in the case of the 3-horsepower indoor unit shown in FIG. Wind speed can be obtained.
[0015]
Here, the fixed blade 17 has the following effects. That is, in the indoor unit of 3 horsepower (small air volume), when there is no fixed blade 17, the air leaving the lower end of the projecting member 19 has a large opening diameter on the lower side of the projecting member 19, so It spreads out and is blown out along the outer wall surface of the blowout port 15a of the decorative panel 15. Therefore, the effect that the actual opening width B is narrower than the actual opening width A at the time of 5 horsepower cannot be obtained.
On the other hand, the presence of the fixed blade 17 causes the air leaving the lower end of the projecting member 19 to be blown downward along the surface of the fixed blade 17 extending in the vertical direction. The effect that the actual opening width is narrow is easily obtained.
[0016]
In the indoor unit shown in FIG. 3, in the case of horizontal blowing where the direction of the movable blade 18 is changed and the blown air is blown horizontally, the air flowing down along the casing 11 flows between the protruding member 19 and the fixed blade 17. It is brought inward (the drain pan 12 side) due to the presence of. However, since the movable vane 18 having a flat surface curved inward exists at the air outlet 15a, the air once drawn inward is caused by the Coanda effect due to the curvature of the lower surface of the movable vane 18 positioned substantially in the horizontal direction. The wind direction is quickly changed and blown out horizontally. Therefore, there is no adverse effect due to the presence of the protruding member 19 and the fixed blade 17 during horizontal blowing.
[0017]
As described above, the ceiling-embedded indoor unit according to the present embodiment is an indoor unit having 3 horsepower (17 m ³ / min), and is movable at the bottom of the casing 11 and the drain pan 12 with the fixed blade 17 at the outlet 15a. A decorative panel 15 provided with blades 18 is attached. Further, a protruding member 19 that protrudes inward and smoothly communicates with the fixed blade 17 from the inner wall surface 11 a is provided at the lower portion of the casing 11.
The decorative panel 15 is also used as a 5-horsepower (30 m ³ / min) ceiling-embedded indoor unit in which the protruding member 19 is not provided. In this 5-horsepower indoor unit, the actual opening width A of the blowout port 15a is larger than the actual opening width B of the 3-horsepower indoor unit, and the wind speed is almost the same as the blowing wind speed of the 3-horsepower indoor unit. It is like that.
[0018]
That is, according to the present embodiment, the decorative panel 15 can also be used as a high-capacity embedded indoor unit that does not include the protruding member 19, and the layout of the embedded indoor unit can be improved. In addition, the cost of the decorative panel 15 can be reduced by sharing the parts of the decorative panel 15.
[0019]
FIG. 4 is a longitudinal sectional view of the vicinity of the air outlet in the ceiling-embedded indoor unit of the present embodiment .
The ceiling-embedded indoor unit has a capacity of 5 horsepower (30 m ³ / min), for example.
31 is a casing and 32 is a drain pan. A blowout passage 33 is formed by the inner wall surface 31 a of the casing 31 and the outer wall surface 32 a of the drain pan 32. In addition, an air passage enlargement portion 41 is provided in the lower portion of the outer wall 32a of the drain pan 32. The air passage enlargement portion 41 is formed by obliquely cutting the lower corner portion to enlarge the width of the air passage toward the downstream side.
[0020]
A decorative panel 35 is attached to the bottom of the casing 31 and the drain pan 32. And the outer wall 36 of the blower outlet 35a of the decorative panel 35 curves inward, and is smoothly connected to the inner wall surface 31a of the casing 31. On the other hand, the inner wall 37 of the air outlet 35 a is curved inward and continues to the lower end of the air passage enlarged portion 41 provided in the drain pan 32.
[0021]
In the blower outlet 35a of the decorative panel 35, a movable blade 39 having a surface curved inward from the outside and capable of changing the direction of the surface, and a straight plane and a lower end slightly outward. The fixed blade | wing 40 extended diagonally toward is provided. Here, the upper end of the fixed blade 40 is provided so as to be connected to the extension of the air stream line upstream of the upstream end of the air passage expanding portion 41.
[0022]
In the above configuration, the air that flows down along the outer wall surface 32a of the drain pan 32 after heat exchange by the heat exchanger 34 is indoors along the surface of the air passage expanding portion 41 and the surface of the wall 37 of the decorative panel 35. Will be blown out. Therefore, the actual opening width D of the air outlet 35a of the decorative panel 35 is the distance between the inner wall surface 31a of the casing 31 and the tip of the wall 37 of the air outlet 35a.
[0023]
FIG. 5 is a longitudinal sectional view of the vicinity of the air outlet in a ceiling-embedded indoor unit having a capacity of 3 horsepower (17 m ³ / min), for example.
In this three-horsepower indoor unit, the outer wall surface 32a of the drain pan 32 is not provided with the air passage expanding portion 41 like the indoor unit shown in FIG. The decorative panel 35 has the same structure as the decorative panel 35 of the indoor unit shown in FIG.
The downstream end of the outer wall surface 32 a of the drain pan 32 continues to the fixed blade 40.
In the three-horsepower indoor unit having the above-described configuration, the air passage expanding portion 41 is not provided in the outer wall surface 32a of the drain pan 32. Therefore, the heat exchanger 34 performs heat exchange along the outer wall surface 32a of the drain pan 32. The air descending in this way is guided by the fixed vanes 40 and blown straight down.
[0024]
Therefore, the actual opening width C of the air outlet 35a in this 3-horsepower indoor unit is the distance between the inner wall surface 31a of the casing 31 and the tip 40a of the fixed blade 40. The actual opening width C is narrower than the actual opening width D in the indoor unit shown in FIG. 4 by an interval between the tip 40a of the fixed blade 40 and the tip of the wall 37 of the decorative panel 35. Therefore, in the 3-horsepower indoor unit shown in FIG. 5, air is not blown out between the fixed blade 40 and the wall 37 of the blowout port 35a of the decorative panel 35, and in the case of the 5-horsepower indoor unit shown in FIG. The wind speed is almost the same as the blown wind speed.
[0025]
In the case of the three-horsepower indoor unit shown in FIG. 5, the air leaving the lower end of the outer wall surface 32a of the drain pan 32 does not spread below the drain pan 32 due to the presence of the fixed blades 40, and is directly below. Blown out.
[0026]
As described above, the ceiling-embedded indoor unit in the present embodiment is a 5-horsepower (30 m ³ / min) indoor unit, which is movable at the bottom of the casing 31 and the drain pan 32 and with the fixed blade 40 at the outlet 35a. A decorative panel 35 provided with blades 39 is attached. In addition, an air passage expanding portion 41 is provided at the lower corner portion of the outer wall surface 32a of the drain pan 32. The air passage expanding portion 41 has an obliquely cut shape and extends to the inner wall 37 of the outlet port 35a to increase the width of the outlet passage 33. ing.
The decorative panel 35 is also used as a three-horsepower (17 m ³ / min) ceiling-embedded indoor unit in which the air passage expanding portion 41 is not provided. In this 3-horsepower indoor unit, the actual opening width C of the air outlet 35a is narrower than the actual opening width D of the 5-horsepower indoor unit, and the wind speed is almost the same as the blowing wind speed of the 5-horsepower indoor unit. It is like that.
[0027]
That is, according to the present embodiment, the decorative panel 35 can also be used as a small-capacity ceiling-embedded indoor unit in which the air passage expanding portion 41 is not provided, and the layout of the ceiling-embedded indoor unit can be improved. In addition, the cost of the decorative panel 35 can be reduced by sharing the parts.
[0028]
In the embodiment described above, the air passage enlarged portion 41 is provided in the drain pan 32, but the present invention is not limited to this. In short, any air outlet forming member that forms the air outlet passage facing the inner wall 31a of the casing 31 may be used.
The ceiling-embedded indoor unit may be a type that blows out air after heat exchange in four directions or a type that blows out air in two directions.
[0029]
【The invention's effect】
As apparent from the above, in-ceiling indoor unit of the invention according to claim 1, a casing body including outlet passage forming member having an air passage enlarged portion expanding toward the exit, the air outlet Since the decorative panel having the fixed vane and the movable vane connected on the extension of the air flow line upstream from the upstream end of the passage expanding portion is provided, the decorative panel has a small structure in which the air passage expanding portion is not provided. It can also be used as a ceiling-embedded indoor unit with small capacity. Therefore, the layout of the ceiling-embedded indoor units having different capabilities can be improved. In addition, Ru can reduce the cost by performing the standardization of the decorative panel parts.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a ceiling-embedded indoor unit as a reference example .
FIG. 2 is a longitudinal sectional view showing a state in which the same decorative panel as the decorative panel in FIG. 1 is used in a high-capacity embedded ceiling indoor unit.
FIG. 3 is an explanatory diagram of a blowing direction when the ceiling-embedded indoor unit shown in FIG. 1 is blown horizontally.
FIG. 4 is a longitudinal sectional view of the ceiling-embedded indoor unit according to the present invention .
5 is a longitudinal sectional view showing a state in which the same decorative panel as the decorative panel in FIG. 4 is used in a small-capacity ceiling-embedded indoor unit. FIG.
FIG. 6 is a longitudinal sectional view of a conventional ceiling-embedded indoor unit.
[Explanation of symbols]
11, 31 ... casing, 12, 32 ... drain pan,
13, 33 ... Blowing passageway, 14, 34 ... Heat exchanger,
15, 35 ... makeup panel, 15a, 35a ... air outlet,
16 ... ceiling, 17, 40 ... fixed blade,
18, 39 ... movable blades, 19 ... projecting members,
41 ... Air passage enlarged portion.

Claims (1)

Air passage enlarged portion expanding toward the outlet casing body includes outlet passages forming member (32) having (41) (31),
With attached to the bottom of the casing body (31), has an outlet (35 a) having a substantially equal magnitude to the downstream end of the air passage enlarged portion (41), in that the air outlet (35a), decorative panel having the air passage enlarged portion (41) fixed vanes (40) continuous with an extension of the streamlines of the air upstream of the upstream end of a movable vane (39) (35)
A ceiling embedded indoor unit characterized by comprising:

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