JP2003232528A - Ceiling embedded type air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ceiling embedded type air conditioner capable of reducing the size of an outer housing in the height direction. <P>SOLUTION: The ceiling embedded type air conditioner has a partition board 41 for dividing the inside of the outer housing 11 into upper and lower parts inside the outer housing 11 suspended from the ceiling, and also has a fan 3 with an air intake facing a primary space 41A under the partition board and an air outlet facing a secondary space 41B over the partition board. In the air conditioner, air taken by the fan 3 is heat-exchanged by a heat exchanger 5 disposed in the secondary space over the partition board and sent out. An opening is formed in the partition board 41 so that a part 33C of a fan housing 33 of the fan 3 projects from the opening, and the part 33C of the fan housing 33 is made to face the secondary space 41B over the partition board 41 through the opening. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling-embedded air conditioner having an outer box suspended from a ceiling and having a reduced size in the height direction.

[0002]

2. Description of the Related Art Generally, a ceiling-embedded air conditioner called a two-way cassette or a four-way cassette,
A partition plate that partitions the inside of the outer box up and down is provided in the outer box that is hung on the ceiling.The air intake port faces the primary space under the partition plate and the air outlet port is located above the partition plate. The air conditioner with built-in ceiling that attaches a blower facing the secondary space of the above, and exchanges the air sucked by this blower with a heat exchanger located in the secondary space above the partition plate to blow the air. It has been known.

By the way, in recent years, buildings such as buildings with a low ceiling have become widespread, and when installing this ceiling-embedded air conditioner in this kind of building, the height of the outer box is inevitable. The size of the direction will be restricted.

[0004]

However, in the conventional structure, in the primary space below the partition plate installed in the outer box,
Since all of the fan cases of the blower are housed, the partition plate becomes higher by that amount, and if a secondary space is secured above it, there is a problem that the size of the outer box in the height direction becomes large. is there.

Therefore, an object of the present invention is to provide a ceiling-embedded air conditioner in which the size of the outer box in the height direction can be reduced.

[0006]

The invention according to claim 1 is
A partition plate that partitions the inside of the outer box up and down is provided in the outer box that is hung on the ceiling.The air intake port faces the primary space under the partition plate and the air outlet port is located above the partition plate. The air conditioner with built-in ceiling that attaches a blower facing the secondary space of the above, and exchanges the air sucked by this blower with a heat exchanger located in the secondary space above the partition plate to blow the air. In the above, in the partition plate, an opening is formed so that a part of the fan case of the blower can be projected, and a part of the fan case is exposed to the secondary space above the partition plate through this opening. To do.

According to a second aspect of the present invention, in the first aspect, a flange for attaching the blower to the partition plate is integrally formed on the outer surface of the fan case, and the flange is located above the flange. A part of the fan case is exposed to the secondary space above the partition plate.

According to a third aspect of the present invention, in the second aspect, the fan case is divided into an upper case and a lower case, and the flange is formed integrally with the upper case. To do.

According to a fourth aspect of the present invention, a partition plate for partitioning the interior of the outer box into upper and lower parts is provided in an outer box suspended from the ceiling, and an air suction port is provided in the primary space below the partition plate. Install a blower with the air outlet facing the secondary space above the partition plate and exchange the heat of the air sucked by this blower with the heat exchanger located in the secondary space above the partition plate. In a ceiling-embedded air conditioner that blows air, a nozzle that defines an air suction port of the blower is provided on a side surface of a fan case of the blower,
The fan case is characterized in that it is provided with a substantially arcuate projection on the side surface of the fan lower part.

According to a fifth aspect of the present invention, in the fourth aspect, the protrusion has a length that is approximately 1/3 of the outer circumference of the nozzle.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the partition plate is a heat insulating steel plate.

According to a seventh aspect of the present invention, in the sixth aspect, the heat insulating surface of the partition plate faces the secondary space above the partition plate.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a ceiling-embedded air conditioner, which is generally called a so-called two-way cassette, having two air outlets. Reference numeral 1 denotes a box-shaped indoor unit body, and the indoor unit body 1 accommodates various devices such as a blower 3, a heat exchanger 5, a styrene foam drain pan 7, and a drain pump (not shown).

The indoor unit body 1 is suspended from the ceiling of the room to be conditioned by a plurality of suspension bolts (not shown),
A decorative panel 9 is attached to the opening surface of the indoor unit body 1 facing downward.

FIG. 2 is an exploded perspective view showing the indoor unit body 1.

The indoor unit body 1 has an outer box 11 made of sheet metal. The outer box 11 includes an outer box body 11A that is bent in a substantially U-shape, and a pair of end plates 11B attached to both ends of the outer box body 11A. A heat insulating material 13 is arranged inside the outer box 11.
This heat insulating material 13 includes a pair of styrofoam end members 13A arranged corresponding to each end plate 11B, and a polyethylene connecting member 13B connecting between the end members 13A.
It consists of and. Reference numeral 5 is a heat exchanger formed in a substantially U shape, and 15 is a drain pump.

FIG. 3 is an exploded perspective view showing the indoor unit body 1 and the drain pan 7.

After the indoor unit body 1 is assembled, a drain pan 7 made of styrofoam is fitted in the opening of the outer box 1. A large suction opening 7A is formed in the center of the drain pan 7, and a pair of elongated blowout openings 7B are formed on both sides of the opening 7A. That is,
The indoor air sucked by the blower 3 through the suction opening 7A is used as the heat exchanger 5 arranged inside the outer box 11.
The heat-exchanged conditioned air is blown out into the room through a pair of elongated blow-out openings 7B formed on both sides of the suction opening 7A.

Reference numeral 17 is a metal plate-made reinforcing metal fitting. The reinforcing metal fitting 17 is directed to a side edge portion of the suction opening 7A of the drain pan 7, and both ends of the reinforcing metal fitting 17 are attached to the outer box 11 via screws 19. It is fixed to the upper edge portion 11C of the end plate 11B.

The outer box 11 made of sheet metal is deformed and easily bent. Therefore, a center metal fitting 21 is provided at a substantially central portion of the outer case 11 so as to be hung between the outer wall of the outer case 11 and a fixed portion of the drain pan 7. The warp and the opening of the central portion of the outer box 11 are prevented.

FIG. 4 shows a procedure for incorporating the blower 3 into the indoor unit body 1.

The blower 3 is fixed to a box-shaped partition plate 41 made of sheet metal, and the partition plate 41 is fixed to the indoor unit body 1 (reinforcing plate 17) via a plurality of screws. ing. Specifically, the blower 3 is configured by disposing a motor 31 in the central portion and equipping output shafts on both sides of the motor 31 with impellers 32. The impeller 32 is surrounded by a fan case 33, and the fan case 33
Is vertically divided into an upper case 33A and a lower case 33B.

As shown in FIG. 4B, flanges 36 are integrally formed on both sides of the upper case 33A. The upper case 33A has a part 33C thereof projected to the outside of the partition plate 41 to form a partition. The flange 36 is attached to the opening of the plate 41, and the flange 36 passes through a screw through the flange 36.
It is fixed to.

This partition plate 41, as shown in FIG.
The inside of the outer box 11 described above is divided into upper and lower parts, a primary space 41A is formed below the partition plate 41, and a secondary space 41B is formed above the partition plate 41.

Since the upper case 33A is fixed to the partition plate 41 via the flange 36, the strength of the partition plate 41 is increased and the sealing property between the primary space 41A and the secondary space 41B is improved. be able to.

In the blower 3, the air intake port faces the primary space 41A below the partition plate 41, the air outlet port faces the secondary space 41B above the partition plate 41, and from the flange 36 of the upper case 33A. A part 33C of the fan case located above is also exposed to the secondary space 41B above the partition plate 41.

In the present embodiment, referring to FIG. 1, a part 33C of the fan case located above the flange 36 of the upper case 33A is exposed through the opening of the partition plate 41 to the upper secondary space 41B. Therefore, as in the conventional case, the primary space 41A below the partition plate 41 installed in the outer box 11
Since the position of the partition plate 41 is lowered by that much as compared with the case where all the fan cases 33 of the blower 3 are accommodated therein, the air passage substantially equivalent to the conventional one is sufficiently secured in the outer box 11. In the above, the dimension of the outer box 11 in the height direction can be kept low.

Therefore, even for a building such as a building whose height above the ceiling is low, it is possible to obtain an effect such that the building can be easily installed above the ceiling.

Next, another embodiment will be described.

Referring to FIG. 4, in the blower 3, when the upper case 33A and the lower case 33B are joined by a plurality of screws, the nozzles 33D defining the air suction port are provided on both sides of the fan case 33. It is integrally formed.

In this alternative embodiment, the side surface of the fan case 33, below the nozzle 33D, that is, below the nozzle 33D of the lower case 33B, is provided with a length of about 1/3 of the outer circumference of the nozzle. , And is provided with a substantially arcuate projection 33E. 33F is an outlet of the blower 3.

FIG. 5 shows the noise measurement result when the protrusion 33E is provided, and FIG. 6 shows the noise measurement result when the protrusion 33E is not provided.

Compared with FIG. 6, in this embodiment, the wind blown by the blower 3 is rectified by the projections 33E and smoothly guided to the blower 3, so that the total noise is reduced from 42.1 db to 40.6 db. Decreased, especially 400
Noise near Hz was greatly reduced from 43.0 db to 39.3 db.

In each of the above embodiments, it is desirable that the partition plate 41 be formed of a so-called heat insulating steel plate. In this case, it is desirable that the heat insulating surface of the partition plate 41 faces the secondary space 41B above the partition plate 41. According to this,
With reference to, the sealability between the partition plate 41 and the internal expanded polystyrene 13 is improved, and noise generated in the secondary space 41B is absorbed.

Although the present invention has been described based on the embodiment, it is obvious that the present invention is not limited to this.

[0037]

According to the present invention, in the ceiling-embedded air conditioner, the size of the outer box in the height direction is suppressed, and the size is reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a ceiling-embedded air conditioner according to the present invention.

FIG. 2 is an exploded perspective view of an air conditioner body.

FIG. 3 is an exploded perspective view of an air conditioner body and a drain pan.

FIG. 4 is an exploded perspective view of an air conditioner body, a drain pan, and a blower.

FIG. 5 is a diagram showing a noise measurement result according to the present embodiment.

FIG. 6 is a diagram showing a conventional noise measurement result.

[Explanation of symbols]

1 Indoor unit body 3 blower 5 heat exchanger 11 outer box 33 fan case 33A upper case 33B lower case 33C part 33D nozzle 33E protrusion 36 flange 41 Partition board 41A Primary space 41B Secondary space

Continued front page    (72) Inventor Kazuhiro Hinata             1 Otsuki-cho, Ashikaga City, Tochigi Prefecture Sanyo Electric Air Conditioning             Within the corporation (72) Inventor Yukito Nawata             1 Otsuki-cho, Ashikaga City, Tochigi Prefecture Sanyo Electric Air Conditioning             Within the corporation F term (reference) 3L049 BB06 BB08 BB10 BB11 BC02                       BD02

Claims (7)

[Claims] 1. A partition plate for partitioning the interior of the outer box into upper and lower parts is provided in an outer box hung on the ceiling, and an air suction port is made to face the primary space under the partition plate, and an air outlet port is provided on the partition plate. Install a blower that faces the secondary space above the partition plate, and replace the air sucked by this blower with a heat exchanger that is placed in the secondary space above the partition plate to blow air to the ceiling. In the embedded air conditioner, an opening is formed in the partition plate so that a part of the fan case of the blower can project, and a part of the fan case faces a secondary space above the partition plate through the opening. A built-in ceiling type air conditioner. 2. A flange for attaching the blower to the partition plate is integrally formed on an outer surface of the fan case, and a part of the fan case located above the flange is located above the partition plate. The ceiling-embedded air conditioner according to claim 1, wherein the air conditioner is exposed to the next space. 3. The ceiling embedded air conditioner according to claim 2, wherein the fan case is divided into an upper case and a lower case, and the flange is formed integrally with the upper case. 4. An outer box hung on the ceiling is provided with a partition plate for partitioning the outer box into upper and lower parts, and an air suction port is made to face the primary space under the partition plate, and an air outlet port is provided on the partition plate. Install a blower that faces the secondary space above the partition plate, and replace the air sucked by this blower with a heat exchanger that is placed in the secondary space above the partition plate to blow air to the ceiling. In a blow-in type air conditioner, a nozzle defining an air suction port of the blower is provided on a side surface of a fan case of the blower, and a side surface of the fan case is provided with a substantially arc-shaped projection at a lower portion of the nozzle. A built-in ceiling type air conditioner. 5. The ceiling-embedded air conditioner according to claim 4, wherein the protrusion has a length that is approximately 1/3 of the outer circumference of the nozzle. 6. The ceiling-embedded air conditioner according to any one of claims 1 to 5, wherein the partition plate is a heat insulating steel plate. 7. The ceiling-embedded air conditioner according to claim 6, wherein a heat insulating surface of the partition plate faces a secondary space above the partition plate.