JPH06159719A - Air-conditioning machine - Google Patents

Abstract

PURPOSE:To obtain sufficient heat insulating effect in spite of thin thickness and attain the miniaturization of a casing by a method wherein the foamed body of vinylidene chloride is employed for a heat insulating material arranged in the casing, in which a heat exchanger, a fan and the like are received. CONSTITUTION:In a ceiling-embedded type air-conditioning machine, indoor air, sucked by a centrifugal fan 8 from a suction grille 7 through an air filter 7 and a nozzle plate 12, is cooled or heated by heat exchange in a heat exchanger 14 and, thereafter, is discharged out of an air outlet port 6. Drain water, condensed in the heat exchanger 14, drops into a drain pan 13 while the drain pan 13 effects as a heat insulating material for preventing the downward radiation of heat of the heat exchanger 14. In this case, the drain pan 13 is formed of the foamed body of vinylidene chloride. According to this method, heat insulating performance of about 1.5 times compared with a heat insulating material made of foamed styrol is obtained whereby the thinning of the drain pan 13 can be contrived and the miniaturization of a casing can be realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner containing a heat exchanger, a blower and the like.

[0002]

2. Description of the Related Art As shown in Japanese Patent Publication No. 56-20467, a heat insulating material made of styrofoam is incorporated in an air conditioner in which a heat exchanger, a blower and the like are housed. By incorporating the styrofoam heat insulating material in the machine in this way, the heat loss of the air cooled or heated by the heat exchanger is improved and the heat loss is suppressed.

[0003]

The heat insulation material made of expanded polystyrene generally has a thermal conductivity of about 0.030 at 0 ° C.
It is about (Kcal / mhc), and it cannot be denied that the thermal conductivity is lower than 0.016 (Kcal / mhc) of urethane foam and 0.023 (Kcal / mhc) of extruded polystyrene foam.

Therefore, in order to improve the heat insulating effect by using styrofoam, the thickness of the heat insulating material must be necessarily increased, which increases the size of the housing and the storage space for other equipment. There was a risk of becoming smaller.

Further, since styrene foam is inferior in oil resistance as compared with, for example, glass wool, when a lead wire hits this styrene foam, the plasticizer of the coating material of the lead wire migrates to this styrene foam, and the polystyrene foam is plastically deformed. There was a risk of losing its shape. Therefore, in order to prevent the styrene foam and the lead wire from directly contacting each other,
It was necessary to interpose a tape between them.

Further, since Styrofoam has poor oil resistance,
It was not preferable to install an air conditioner using styrofoam as a material for the drain pan or casing in a machine factory (cutting factory). Therefore, an air conditioner installed in a machine factory is subjected to a special treatment such as coating the entire parts formed of styrofoam with an epoxy resin to prevent the styrofoam molded product from being eroded by cutting oil or the like.

When Styrofoam is used as the heat insulating material housed in the housing as described above, the heat insulating material inevitably increases the size of the housing and the storage space of other devices in the housing. There is a problem that a tape for preventing migration of the plasticizer and an oil resistant treatment are required.

The present invention is intended to obtain a sufficient heat insulating effect with a heat insulating material having a relatively small volume and to reduce the size of the housing and expand the space of the equipment housed in the housing. is there.

[0009]

In order to achieve this object, the present invention uses a vinylidene chloride foam as a heat insulating material arranged in the housing of an air conditioner.

[0010]

[Function] Since the foam of vinylidene chloride has a relatively low thermal conductivity, the same heat insulating effect can be obtained even if the thickness thereof is smaller than that of the polystyrene foam.

[0011]

FIG. 1 is a cross-sectional view of a ceiling-embedded air conditioner, in which the air conditioner (housing) 1 is installed substantially flush with a main body 2 embedded in the ceiling and a ceiling surface 3. The decorative panel 4 is used. A suction grill 5 is provided at the center of the panel 4, and air outlets 6 are provided at the four sides of the outer peripheral portion. Reference numeral 7 is an air filter arranged on the secondary side of the suction grill 5.

Reference numeral 8 denotes a centrifugal fan (blower) made of a synthetic resin with one-sided suction called a turbo fan, 9 denotes a fan motor mounted on a top plate 10 of the main body 2 with support legs 11, 1
Reference numeral 2 is a nozzle plate for sucking indoor air from the suction grill 3 into the centrifugal fan 8, 13 is a drain pan formed in a ring shape, and 14 is a discharge side ventilation passage 15 through which air is discharged from the centrifugal fan 6 in the entire circumferential direction It is an annular heat exchanger arranged in.

In the air conditioner 1 having such a structure, when the centrifugal fan 8 is operated, the indoor air sucked into the centrifugal fan 8 from the suction grill 7 through the air filter 6 and the nozzle plate 12 is removed. It is discharged from the centrifugal fan 8 in the entire circumferential direction. The discharged air is guided to the heat exchanger 14, cooled or heated, and blown out from the discharge port.

Here, the present invention is based on the above-mentioned drain pan 13.
The drain pan 13 receives drain water dropped from the heat exchanger 14 and also acts as a heat insulating material for preventing heat from the heat exchanger 14 from radiating downward of the main body. The drain pan 13 is formed of a vinylidene chloride (PVDC) foam. As one of the vinylidene chlorides, there is Asahi Kasei Kogyo Co., Ltd., trade name "Cellmore". Table 1 shows the comparison of the physical properties of this Cellmore and general polystyrene foam.

[0015]

[Table 1]

In Table 1, in particular, the thermal conductivity of styrofoam is 0.030, while that of cell mower is 0.
019, which is about 1.5 times lower in thermal conductivity than Styrofoam. Therefore, according to the experiment, the drain pan 1
Even when the thickness A of 3 (see FIG. 1) was reduced from the conventional value of about 100 mm to about 60 mm (about 2/3), the heat insulating effect was not reduced.

FIG. 2 shows the relationship between the apparent density and the thermal conductivity of this cell moor and other heat insulating materials. From this FIG. 2 as well, the thermal conductivity of the cell moor is that of glass wool, urethane foam, expanded polystyrene, etc. Has proven to be better than.

Further, since the cell mower has good oil resistance, even if a lead wire (not shown) is directly contacted with the drain pan 13, the plasticizer of the coating material of the lead wire does not move to the drain pan. This prevented the drain pan from losing its shape. Furthermore, even if an air conditioner containing such a drain pan is installed in a machine factory (cutting factory) and cutting oil adheres to this drain pan, the drain pan has good oil resistance, so that the cutting oil is not eroded by the cutting oil. Absent.

Further, according to the embodiment, this drain pan 1
Contact part 16 between 3 and another member (for example, nozzle plate 12)
In the above, it is conceivable that both of them rub due to the difference in expansion coefficient. At this time, no audible rubbing noises such as “key” and “key” were generated. It is considered that this is because the surface resistance of the drain pan formed of Cellmore is smaller than the surface resistance of the Styrofoam drain pan.

FIG. 3 shows an embodiment in which such a heat insulating material made of Selmore is adopted in a home air conditioner 30. The air conditioner 30 includes a bent heat exchanger 3
1, a cross flow fan 32, a drain pan 33, etc. are housed, and by operating this cross flow fan 32, indoor air is sucked into the machine through the suction grill 34,
The blow-out port 35 after being cooled or heated by the heat exchanger 31
Is discharged more. Here, 36 is the cross flow fan 3
The rear casing 2 has a rear casing 36, and the rear casing 36 has a back surface to which the heat insulating material 37 made of the above cell moa is attached. A refrigerant pipe 38 is provided below the heat insulating material 37.
And storage space 4 where the inter-unit cable 39 is placed
0 is provided. Therefore, by reducing the thickness of the heat insulating material 37, the storage space 40 described above can be made large, and the refrigerant pipe 38 and the like can be stored easily. Moreover, the cable 39 between the units is the heat insulating material 37.
Since the plasticizer of the cable 39 does not transfer to the heat insulating material 37 even if it directly contacts the heat insulating material 37, the heat insulating material 37 can be prevented from being deformed. Therefore, conventionally, the inter-unit cable 39 is arranged in the storage space 40 so that the inter-unit cable 39 does not hit the heat insulating material (made of styrofoam), but according to the present invention, the storage position of the inter-unit cable 39. There is no need to worry about it, and it is possible to facilitate the installation work. Further, if the drain pan 33 is formed of cellumore, the thickness of the drain pan 33 can be reduced.

[0021]

As described above, according to the present invention, since the foam of vinylidene chloride is used as the heat insulating material arranged in the housing of the air conditioner, it is thicker than the heat insulating material made of styrofoam. Even if it is made thin, the same heat insulating effect can be obtained, so that it is possible to reduce the size of the housing and save the space of the equipment housed in the housing.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an air conditioner of the present invention.

FIG. 2 is an explanatory diagram showing the thermal conductivity of the material of the heat insulating material shown in FIG.

FIG. 3 is a vertical cross-sectional view showing an air conditioner of another embodiment of the present invention.

[Explanation of symbols]

 1 Air conditioner 8 Blower 13 Drain pan (heat insulating material) 14 Heat exchanger

Claims (1)

[Claims] 1. An air conditioner characterized by using a foam of vinylidene chloride as a heat insulating material arranged in a housing accommodating a heat exchanger, a blower and the like.