JP2770672B2 - Ceiling-mounted air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-ceiling type air conditioner, and more particularly to a technique for preventing dew condensation due to discharged air.

[0002]

2. Description of the Related Art As a conventional technique for installing a main body of a ceiling-embedded type air conditioner (hereinafter simply referred to as an air conditioner) in a ceiling, for example, Japanese Unexamined Utility Model Publication No. 1-140429 discloses FIG. Which has the following structure.

[0003] That is, a heat insulating material for preventing dew condensation is stuck on the outer surface and the inner surface of a casing (box) of an air conditioner main body, and a hanging metal fitting having a through hole is screwed from above the outer heat insulating material. An air conditioner main body is installed by passing a suspension bolt provided in the ceiling through the suspension fitting and tightening a nut.

[0004]

However, in the above-mentioned prior art, the hanging bracket is screwed over the heat insulating material.
Since the portion of the heat insulating material that is in contact with the hanging metal is crushed by the hanging metal, the heat insulating effect is reduced, and there has been a problem that dew condensation occurs. Furthermore, dew condensation has also been caused by the heat transfer effect of the screws used for fixing the hanging fittings.

A conventional method for solving these problems is shown in FIG. That is, a new heat insulating material 30 is stuck on the first side plate 2b of the casing (on which the heat insulating material is installed) so as to cover the portion of the hanging metal fitting 29 screwed on the first side plate 2b (where the heat insulating material is installed). is there. By this method, dew condensation can be surely prevented. However, as a result of using the new heat insulating material 30, there has been a problem that the number of parts increases and the accompanying (pasting) man-hour increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a ceiling-embedded air conditioner capable of exhibiting a dew condensation preventing function without increasing the number of parts and the number of attaching steps. is there.

[0007]

The invention according to claim 1 is
(A) a box body of an air conditioner main body having first and second side plates, and (b) a first affixed on outer surfaces of the first and second side plates.
A heat insulating material, (c) a suspension fitting fixed to the first side plate via the first heat insulating material, and (d) disposed inside the box so as to face the first and second side plates, and The second that forms the passage
A heat insulating material, (e) an air layer formed between the inner surface of the first side plate and the second heat insulating material, and (f) an air layer penetrating through the first side plate and the first heat insulating material and the outside air. And a vent hole for connection.

According to a second aspect of the present invention, there is provided the first heat insulating member disposed between the corner of the side surface of the second heat insulating material facing the first side plate and the inner surface of the first side plate; A top plate of the box body on which an upper surface of the material is disposed, and a second sealant disposed on a decorative panel and in contact with a lower end of the first side plate and a lower surface of the second heat insulating material. 1 is a diagram in which an air layer is formed.

[0009]

According to the first aspect of the present invention, since the air layer is connected to the outside air through the through holes, the temperature of the air layer is raised by the outside air and becomes a value close to the temperature of the outside air.

In the invention according to the second aspect, the air layer is surrounded by the first and second sealing materials, the top plate, and the second heat insulating material. Therefore, the outside air that has flowed into the air layer through the vent increases the temperature in the air layer.

[0011]

【Example】

(1) Overall Configuration of Air Conditioner FIG. 1 is a longitudinal sectional view showing an air conditioner according to an embodiment of the present invention. As shown in the figure, the main body is mounted on a suspension bolt 8 via a suspension fitting 7. A decorative panel 12 is attached to the lower surface (bottom plate) of the main body by screws (not shown), and the decorative panel 12 covers the opening of the ceiling surface 11. The decorative panel 12 has a suction grille 6 that can be opened and closed at its suction port, and its outlet 13 faces an air passage 14 inside the main body.

The casing 10 of the main body is made of sheet metal (1 mm thick).
Degree), and is composed of a top plate 9 and a side plate 5.
Note that the side plate 5 corresponds to a first side plate described later. Although not shown in the figure, a first heat insulating material (such as foamed polyethylene) is attached on the outer surface of the casing 10. This will be apparent from FIG. 4 described later.
Furthermore, in the form of forming an air layer to be described later between the side plate 5 and
A second heat insulating material 16 is inserted and arranged on the inner surface side of the casing 10. The upper surface (the surface facing the top plate 9) and the side surface (the surface facing the side plate 5) of the second heat insulating material 16 are integrally formed of resin such as foamed polyethylene.

The air sucked by the fan 3 installed on the top plate 9 is sent to the heat exchanger 1 by the blower 2 and is converted into cool air or hot air. Then, the discharge air 24 discharged from the heat exchanger 1 is blown out from the blowout port 13 through the ventilation passage 14.

Next, the casing 10 which is the core of the present invention will be described.
The structure of the side plate and its peripheral portion will be described below.

(2) Side Plate and Peripheral Structure of Casing FIG. 2 is a plan view of the air conditioner main body viewed from the ceiling 9 side. However, in FIG. 2, illustration of functional parts such as the heat exchanger 1 shown in FIG. 1 is omitted. This is to clarify the casing 10 and its peripheral mechanism.

As shown in FIG. 1, the side plates of the casing 10 are classified into a first side plate 5 and a second side plate 17. On the outer surfaces of the first and second side plates 5, 17, the first
A heat insulating material 20 is installed. On the outer surface of the first heat insulating material 20 on the first side plate 5, the hanging metal 7 is screwed.

On the other hand, the side surface of the second heat insulating material 16 is the first heat insulating material.
And a second sealing material 18 made of urethane or the like is attached to eight corners of the casing 10 before being inserted into the casing 10 before being inserted into the casing 10. Have been. Therefore, when the second heat insulating material 16 is inserted and arranged in the casing 10, an air layer 19 (small space) is formed between the side plates 5 and 17 of the casing 10 and the second heat insulating material 16. This air layer 19 is closed by a first sealing material (urethane-based) stuck on the decorative panel 12, the top plate 9, and the above-mentioned second sealing material 18, as is apparent from FIG. It is a space. The second sealing member 18 not only functions as a forming member of the air layer 19 but also has a function of reducing a squeak sound generated between the side plates 5 and 17 and the second heat insulating material 16.

Next, FIG. 4 shows a cross-sectional view when virtually cut on a plane perpendicular to the plane of the drawing including the broken line BB in FIG. The above-described vertical cross-sectional view of FIG. 1 relates to the disconnection CC of FIG.

FIG. 4 is an enlarged longitudinal sectional view of a fixed portion of the hanging metal 7. As is apparent from FIG.
Is surrounded by the second sealing material 15, the second heat insulating material 16, and the first side plate 5. Also, the plurality of ventilation holes 22 are
It is formed so as to penetrate the heat insulating material 20 and the first side plate 5. A screw hole 31 is formed between the upper and lower ventilation holes 22. On the other hand, a ventilation hole 22 ′ is also formed on the mounting surface of the hanging metal 7, and when the hanging metal 7 is screwed to the first side plate 5 with the screw 30, the first side plate 5 and the first side plate 5 are connected. The position of the ventilation hole 22 ′ is set so as to be connected to the ventilation hole 22 formed in the heat insulating material 20.

With such a structure, the air space 1
The temperature inside 9 is a value close to the temperature of the outside air 25. That is,
Part of the outside air 25 flows into the air space 19 through the vent hole 22. In addition, the air layer 19 is substantially a closed space except for the vent hole 22. For this reason, even if the air layer 19 is cooled by the discharge air 24 (in this case, cool air), the air layer 19 is heated by the inflowing outside air 25, so that the temperature in the air layer 19 is lower than when the air holes 22 are not formed. Will rise. According to the measurement results, it is as follows. For the outside air temperature of 29.5 to 30.5 ° C. (dew point temperature of 27.5 to 27.9 ° C.), the surface temperature of the hanging metal 7 (point 3)
2) has been raised to 27.9 ° C. and no condensation has occurred. On the other hand, in the conventional technology without the vent hole 22, the surface temperature (the temperature at the point corresponding to the point 32) was as low as 27.0 ° C., and dew condensation occurred.

FIG. 3 is a perspective view showing a state where the hanging metal 7 is screwed to the first side plate 5 to which the first heat insulating material 20 is attached.

As described above, according to the present embodiment, an air conditioner that can easily prevent dew condensation by simply assembling a preformed member can be configured. In this case, there is no need for a work of attaching a separately prepared heat insulating material as in the related art.

In the present embodiment, the ventilation holes 19 are formed in the first heat insulating material 20 and the first side plate 5 which are in contact with the hanging metal 7 and the fixing surface thereof.
Are provided, but the position of the ventilation hole is not limited to this. For example, like the hole 23 shown in FIG. 3, it is also possible to provide a ventilation hole in a portion between the first heat insulating material 20 and the first side plate 5 which does not face the hanging metal 7. In this case, a conventional hanging metal can be used as it is.

[0024]

According to the first and second aspects of the present invention, since the air layer and the ventilation hole are used, dew condensation on the surface of the hanging bracket can be prevented, and a new heat insulating material is required as compared with the prior art. Therefore, the number of parts and the number of attaching steps can be reduced.

[Brief description of the drawings]

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

FIG. 2 is a plan view showing a casing structure of the ceiling-mounted air conditioner according to one embodiment of the present invention.

FIG. 3 is a perspective view showing a casing structure of an embedded ceiling air conditioner according to one embodiment of the present invention.

FIG. 4 is an enlarged longitudinal sectional view of a casing structure of the ceiling-mounted air conditioner according to one embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Casing 5 1st side plate 17 2nd side plate 9 Top plate 20 1st heat insulating material 21 Screw 7 Hanging fitting 24 Discharge air 14 Ventilation path 19 Air layer 22 Vent hole 16 2nd heat insulating material 25 Outside air 15 1st sealing material 18 2nd Seal material

Claims (2)

(57) [Claims] (A) a box body of an air conditioner main body having first and second side plates; (b) a first heat insulating material attached on outer surfaces of the first and second side plates; A) a hanging bracket fixed to the first side plate via the first heat insulating material; and (d) a discharge air passage disposed inside the box so as to face the first and second side plates. A second heat insulating material to be formed; (e) an air layer formed between the inner surface of the first side plate and the second heat insulating material; and (f) a penetrating through the first side plate and the first heat insulating material. And a ventilation hole for connecting the air layer and the outside air. (E-1) a first sealing material disposed on a decorative panel and in contact with a lower end of the first side plate and a lower surface of a second heat insulating material; and (e-2) the first side plate. A second sealant disposed between each of the two corners of the side surface of the second heat insulating material and the inner surface of the first side plate; and (e-3) an upper surface of the second heat insulating material is disposed. The ceiling-embedded air conditioner according to claim 1, wherein the air layer is formed by a top plate of the box body provided.