JP3935736B2 - Embedded ceiling air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a ceiling-embedded air conditioner provided with a sheet metal outer box suspended from a ceiling.
[0002]
[Prior art]
Generally, it is a ceiling-embedded air conditioner called a two-way cassette, a four-way cassette, etc., and includes an outer box made of sheet metal that is suspended from the ceiling. 2. Description of the Related Art A ceiling-embedded air conditioner that includes a heat insulating material and includes a blower and a heat exchanger inside the heat insulating material is known.
[0003]
[Problems to be solved by the invention]
In this type, an optional product such as a humidifier may be attached to the outer wall of the sheet metal outer box. In this case, conventionally, an knockout hole formed in a sheet metal outer box is punched out to form an opening for attaching an optional product. At this time, an opening is simultaneously formed in the foamed polystyrene disposed inside the sheet metal outer box. Will form. At this time, there is a problem that swarf is generated from the polystyrene foam and the processing of the swarf becomes difficult.
[0004]
In addition, the conventional heat insulating material has a box shape as a whole and increases in volume. When these are stacked and transported from a polystyrene foam manufacturing plant to an assembly plant, there is a problem that the transport efficiency is remarkably poor.
[0005]
Therefore, the object of the present invention is to solve the problems of the conventional techniques described above, and when forming an opening for attaching an optional product, it is not necessary to process chips, and heat insulation is stacked and conveyed. An object of the present invention is to provide a ceiling-embedded air conditioner with improved transport efficiency and a method for manufacturing the same.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an invention according to claim 1 includes a sheet metal outer box suspended from a ceiling, a heat insulating material in the outer box, and a blower and a heat exchanger inside the heat insulating material. In the ceiling-embedded air conditioner, the outer box is divided into an outer box body bent into a substantially U shape and a pair of end plates attached to both ends of the outer box body. A pair of styrofoams having a substantially U-shape extending along the inner shape of the outer box from a position corresponding to the edge of the end plate, the heat insulating material arranged on the inner side of the end plate. It is divided into an end member made of polyethylene and a connecting member made of polyethylene having a flat plate shape that is arranged on the longitudinal side of the outer box and connects between the substantially U-shaped tip portions of the end member, and corresponds to the connecting member. Attach optional items to the wall on the long side of the outer box It is characterized in that it comprises a knockout hole for.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
[0011]
FIG. 1 shows a ceiling-embedded air conditioner that is generally referred to as a so-called two-way cassette and has two air outlets. Reference numeral 1 denotes a box-shaped indoor unit main body. The indoor unit main body 1 contains various devices such as a blower 3, a heat exchanger 5, a drain pan 7 made of styrene foam, and a drain pump (not shown).
[0012]
The indoor unit body 1 is suspended from a ceiling of a conditioned room via a plurality of suspension bolts (not shown), and a decorative panel 9 is provided on an opening surface facing the lower side of the indoor unit body 1. It is attached by overlapping.
[0013]
FIG. 2 is an exploded perspective view showing the indoor unit body 1.
[0014]
The indoor unit body 1 has a sheet metal outer box 11. The outer box 11 is divided and configured to include an outer box body 11A bent into 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 is divided into a pair of polystyrene-made end members 13A arranged corresponding to the respective end plates 11B and a connecting member 13B made of, for example, polyethylene that connects the end members 13A. 5 is a heat exchanger formed in a substantially U shape, and 15 is a drain pump.
[0015]
FIG. 3 is an exploded perspective view showing the indoor unit main body 1 and the drain pan 7.
[0016]
After the indoor unit body 1 is assembled, a polystyrene pan drain pan 7 is fitted into 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 heat-exchanged by the heat exchanger 5 arranged inside the outer box 11, and this heat-exchanged conditioned air is placed on both sides of the suction opening 7A. The air is blown into the room through the pair of elongated blowout openings 7B.
[0017]
Reference numeral 17 denotes a sheet metal reinforcing bracket, which is directed to the side edge of the suction opening 7A of the drain pan 7, and both ends of the reinforcing bracket 17 are connected to the end plate 11B of the outer box 11 via screws 19. It is being fixed to 11C of upper edge parts.
[0018]
The sheet metal outer box 11 is deformed and easily bent. Therefore, a center metal fitting 21 is provided in a substantially central portion of the outer box 11 and is spanned between the outer wall of the outer box 11 and the fixing part of the drain pan 7. Warpage and opening of the central portion of the outer box 11 are prevented.
[0019]
FIG. 4 shows a procedure for incorporating the blower 3 into the indoor unit body 1.
[0020]
The blower 3 is fixed to a partition plate 41 made of sheet metal formed in a box shape, and the partition plate 41 is fixed to the indoor unit main body 1 (reinforcing plate 17) via a plurality of screws. Specifically, the blower 3 includes a motor 31 at the center, and includes an impeller 32 on output shafts on both sides of the motor 31. The impeller 32 is surrounded by a fan case 33, and the fan case 33 is divided into an upper case 33A and a lower case 33B.
[0021]
As shown in FIG. 4B, flanges 36 are integrally formed on both sides of the upper case 33 </ b> A. The upper case 33 </ b> A has a portion 33 </ b> C protruding outside the partition plate 41, and The flange 36 is fixed to the partition plate 41 through screws through the flange 36.
[0022]
As shown in FIG. 1, the partition plate 41 partitions the inside of the outer box 11 above and below, a primary space 41 </ b> A is formed below the partition plate 41, and a secondary space is formed above the partition plate 41. A space 41B is formed.
[0023]
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 performance between the primary space 41A and the secondary space 41B can be improved. .
[0024]
The blower 3 has the air inlet facing the primary space 41A below the partition plate 41, the air outlet facing the secondary space 41B above the partition plate 41, and above the flange 36 of the upper case 33A. A portion 33C of the located fan case faces the secondary space 41B on the partition plate 41.
[0025]
In the above configuration, referring to FIG. 1, a part 33C of the fan case located above the flange 36 of the upper case 33A faces the upper secondary space 41B through the opening of the partition plate 41. Compared with the case where all of the fan case 33 of the blower 3 is accommodated in the primary space 41A under the partition plate 41 installed in the outer box 11 as in the prior art, the position of the partition plate 41 is correspondingly increased. Therefore, the size in the height direction of the outer box 11 can be kept low after sufficiently securing an air path substantially equivalent to the conventional one in the outer box 11.
[0026]
Therefore, effects such as easy installation on the back of the ceiling can be obtained even for a building such as a building with a low ceiling.
[0027]
In the present embodiment, as shown in FIG. 2, knockout holes 51 to 54 having various shapes are formed on both wall surfaces of the outer box body 11 </ b> A located on the longitudinal side of the outer box 11. As shown in FIG. 1, when a humidifier (optional product) 55 is attached at the position of the knockout hole 52, the knockout hole 52 is first punched out, and then the polyethylene connecting member 13 </ b> B located inside the knockout hole 52 is knocked out. An opening 56 is formed by cutting it into substantially the same shape as 52.
[0028]
Then, the humidifier 55 is attached to the notched opening 56 so that the humidifying portion 55A faces the inside of the outer box 11.
[0029]
In this configuration, since the polyethylene connecting member 13B is located inside the knockout hole 52, when the connecting member 13B is cut out in substantially the same shape as the knockout hole 52, generation of chips is suppressed. Therefore, almost no chip processing is required when attaching optional products. The connecting member 13B is not limited to polyethylene, and may be any member as long as it is a member that can suppress chips and have heat insulation properties.
[0030]
Moreover, in this embodiment, the heat insulating material 13 is divided into a pair of polystyrene-made end members 13 </ b> A arranged on the short side of the outer box 11 and a connecting member 13 </ b> B arranged on the long side of the outer box 11. Therefore, the end member 13A and the connecting member 13B can be separately packed and transported.
[0031]
The end member 13A is made of expanded polystyrene and increases in volume. In addition, it is possible to remarkably improve the transport efficiency when transporting from a foamed polystyrene manufacturing plant to an assembly plant.
[0032]
As mentioned above, although this invention was demonstrated based on one embodiment, it is clear that this invention is not limited to this.
[0033]
【The invention's effect】
According to the present invention, it is not necessary to process chips when an optional product is attached, and the transport efficiency when stacking and transporting the heat insulating material can be significantly improved as compared with the conventional one.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a ceiling-embedded air conditioner according to the present invention.
FIG. 2 is an exploded perspective view of the 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.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Indoor unit main body 3 Blower 5 Heat exchanger 11 Outer box 11A Outer box main body 11B End plate 13 Heat insulating material 13A End member 13B Connecting member 55 Humidifier (optional product)
56 opening

Claims (1)

In a ceiling-embedded air conditioner equipped with a sheet metal outer box suspended from the ceiling, with a heat insulating material in the outer box, and with a blower and a heat exchanger inside the heat insulating material,
The outer box is divided into an outer box main body bent into a substantially U shape and a pair of end plates attached to both ends of the outer box main body, and the heat insulating material disposed inside the outer box , A pair of polystyrene foam end members that are arranged corresponding to the end plates and extend along the inner shape of the outer box from a position corresponding to the edge of the end plate, and the longitudinal side of the outer box It is divided into a polyethylene connecting member having a flat plate shape that connects between the substantially U-shaped tip portions of the end members, and is provided on the wall surface on the long side of the outer box corresponding to the connecting member. A ceiling-embedded air conditioner comprising a knockout hole for attaching a product .

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