JP2000046362A - Ceiling cassette type air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost ceiling cassette type air conditioner which omits the sticking of heat insulating material to a casing while preventing the trouble caused by drain water or whose casing does not need to be constituted in heat insulating structure, by providing it with a means for receiving the drain water made of dew condensed on the outside of the casing and exhausting it to outside. SOLUTION: An indoor heat exchanger 6 equipped with a blower 5, an in- machine drain pan part 7a for receiving the drain water made of dew condensed in this heat exchanger, and a drain pump for draining the drain water within this in-machine drain pan to outside of the above casing are accommodated in a casing 2 embedded in a ceiling plate 3. Moreover, this air conditioner is provided with an out-machine drain pan 7b which receives the drain water made of dew condensed on the outside of the casing, being made in a body with the in-machine drain pan.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump type ceiling cassette type air conditioner embedded in a ceiling.

[0002]

2. Description of the Related Art Conventionally, this type of ceiling cassette type air conditioner is buried in a ceiling and configured to blow conditioned air such as cold wind or warm wind from a ceiling side to a room below, Since the housing is arranged behind the ceiling, dew condensation may adhere to the outer surface of the housing. For this purpose, a heat insulating material is stuck to this housing, or this housing is formed into a heat insulating structure to prevent dew condensation on the outer surface of the housing.

[0003]

However, in such a conventional ceiling cassette type air conditioner, a heat insulating material is stuck to its housing or this housing is formed in a heat insulating structure. There is a problem that the cost is high. Also,
If high humidity conditions continue, there is also a problem that dew condensation on the outer surface of the housing cannot be completely prevented.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent inconvenience due to the drain water by providing a means for receiving the drain water condensed on the outer surface of the housing and draining the water to the outside. It is another object of the present invention to provide a low-cost ceiling cassette type air conditioner that does not require a heat insulating material to be attached to a housing or that does not require the housing to have a heat insulating structure.

[0005]

According to the first aspect of the present invention, there is provided a heat exchanger provided with a blower in a housing embedded in a ceiling plate;
In the ceiling cassette type air conditioner accommodating an in-machine drain plate that receives drain water condensed in the heat exchanger and a drain pump that drains drain water in the in-machine drain plate out of the housing, the in-machine drain plate A ceiling cassette type air conditioner, wherein an external drain plate is formed integrally with the casing and receives drain water condensed on the outer surface of the housing.

According to the present invention, the drain water condensed on the outer surface of the casing buried in the ceiling plate is received and collected by the external drain plate, and then formed integrally with the external drain plate. It flows into the in-machine drain pan and is drained out of the housing by the drain pump. Therefore, although the dew condensation itself on the outer surface of the housing cannot be prevented, the drain water condensed on the outer surface of the housing can be drained to the outside, so that inconvenience due to the drain water can be prevented beforehand. Further, since there is no need to attach a heat insulating material to the housing or to configure the housing to have a heat insulating structure, cost can be reduced.

Further, since the external drain plate and the internal drain plate are integrally formed, these drain plates can be formed easily and with high precision by molding or the like.
Since the number of parts can be reduced, the workability of the assembly work can be improved.

According to a second aspect of the present invention, in the drain pump, the suction port is provided at a position lower than the drain water receiving surfaces of the internal drain tray and the external drain tray. It is a ceiling cassette type air conditioner.

According to the present invention, since the suction port of the drain pump is located at a position lower than the drain water receiving surfaces of the internal drain tray and the external drain tray, the drain drains of the internal drain tray and the external drain tray are provided. Drain water received by the surface is collected by gravity at the suction port of the drain pump, and drained by the drain pump. For this reason, drainage drainage efficiency can be improved.

According to a third aspect of the present invention, there is provided an external drain pan, wherein drain water in the external drain pan is provided near the installation location of a housing in which a refrigerant pipe through which a refrigerant passes is installed. The ceiling cassette type air conditioner according to claim 1 or 2, wherein a drain water inlet for introduction into the dish is formed.

According to the present invention, since the inside of the installation location of the housing in which the refrigerant pipe is installed is isolated from the air passage of the blower, the interior of the housing is not affected by the blower and can be opened from the inlet of the housing. , Can be efficiently introduced therein.

A fourth aspect of the present invention is the ceiling cassette type air conditioner according to any one of the first to third aspects, wherein a filter is provided at the drain water inlet.

According to the present invention, even if the drain water in the external drain pan is contaminated with dust, the drain water can be purified by the filter.

According to a fifth aspect of the present invention, the external drain pan has a receiving surface for receiving drain water condensed on the inner wall of the housing. This is a ceiling cassette type air conditioner.

According to the present invention, the drain water condensed on the inner wall of the housing can be received by the drain water receiving surface of the external drain plate, collected, and drained to the outside by the drain pump. Therefore, there is no need to provide a heat insulating material on the inner wall of the housing or to provide a heat insulating structure.

[0016]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIG. In these figures, the same or corresponding parts are denoted by the same reference numerals.

FIG. 1 is a longitudinal sectional view of a ceiling cassette type air conditioner 1 according to a first embodiment of the present invention, FIG. 2 is a side sectional view thereof, and FIG. 3 is an exploded perspective view thereof. As shown in these figures, the ceiling cassette type air conditioner 1 embeds a covered rectangular tubular casing 2 such as an indoor unit in a ceiling plate 3 of a building or the like, and inward of the ceiling plate 3 (behind the ceiling). ).

The housing 2 has a heat insulating material 4 lined on the inner wall surface thereof, and a blower 5 and a substantially U-shape or a part thereof cut around the blower 5 are cut inside the housing 2. An indoor heat exchanger 6 bent in a chipped square shape, an in-machine drain plate 7a that receives and collects drain water condensed on the outer surface of the indoor heat exchanger 6, and an inside of the in-machine drain plate 7a. And a drain pump 8 (see FIG. 2) for draining drain water collected outside the housing 2. The indoor heat exchanger 6 is connected to an outdoor heat exchanger of an outdoor unit (not shown) via a refrigerant pipe 12 described later.

As shown in FIGS. 3 and 4, the in-machine drain pan 7
“a” is integrally formed with the external drain pan portion 7 b by molding or the like and formed on the drain pan 7. The external drain pan portion 7 b projects over the entire length around the outer surface of the housing 2 and slightly outwards in the horizontal direction from the outer surface of the housing 2 to form a drain formed on the outer surface of the housing 2. The receiving surface 7ba for receiving water is formed by a groove having a predetermined width. The drain plate 7 is fixed to an opening end 2a on the ceiling plate 3 side of the housing 2 by a screw or the like. Further, a ceiling panel 9 having, for example, a rectangular planar shape is attached to the opening end 2a from the outer surface side of the drain plate 7. are doing.

The ceiling panel 9 forms a suction grille 9a at the center thereof, and a plurality of outlet grilles 9b, 9b,... Around the suction grille 9a, as shown by arrows in FIG. The indoor air is passed through the grill 9a
Air-conditioned air, such as cold air or warm air, which has been sucked in and heat exchanged by the indoor heat exchanger 5, is blown into the room through each blowout grill 9b.

FIG. 4A is a plan view of the inner bottom surface of the drain plate 7, and FIG. 4B is a perspective view of the drain plate 7. As shown in these figures, the drain plate 7 is formed in a substantially octagonal shape in which the plane shape is chamfered at each corner of a square, corresponding to the bottom shape of the opening end 2a of the housing 2. At the outer edge of the bottom surface 7c, an approximately octagonal flange 7d that rises upward as shown in FIG.
The inner bottom surface 7c inside the flange 7c is formed on the receiving surface 7ba of the external drain water by bringing the opening end 2a of the housing 2 into contact with the inner bottom surface 7c inside the housing. An inner bottom surface 7c inside the opening end 2a of the body 2 is formed on the receiving surface 7ab for the internal drain water.

The drain plate 7 has, for example, a circular suction port 7e formed in the center of the inner bottom surface 7c corresponding to the suction grill 9a of the ceiling panel 9, while the suction port 7e is formed.
A plurality of outlets 7f are formed in the inner bottom surface 7c around the outlet grill 9b of the ceiling panel 9 around the outlet 7f. Further, on the inner bottom surface 7c side, a suction port 7e and each outlet 7f are provided.
The collars 10a and 10b slightly rising upward in FIG. 4 are integrally protruded from the periphery of each opening, and the drain water collected on the inner bottom surface 7c leaks outside from the suction port 7e and each outlet 7f. This is prevented by the collars 10a and 10b.

Further, at a required corner on the inner bottom surface 7c, as shown in FIG. 2, a concave portion 1 having a truncated conical shape for accommodating the suction port 8a of the drain pump 8 and recessed toward the outer bottom surface.
1, the inner bottom surface of the recess 11 and the suction port 8a of the drain pump 8 are connected to the inner drain water receiving surface 7ab.
And the drain water received by the internal drain water receiving surface 7ab and the external drain water receiving surface 7ba and collected by the internal drain water receiving surface 7ba and the external drain water receiving surface 7ba. To the inner bottom surface 7c
Is formed. Therefore, as shown in FIG. 2, the height la of the suction port 8a of the drain pump 8 is equal to the height of the sealing surface between the outer bottom surface of the drain plate 7 fixed to the opening end 2a of the housing 2 and the ceiling panel 8. It is set at a position lower than lb (la ≦ lb).

As shown in FIG. 3, a penetrating portion 12a through which the refrigerant pipe 12 penetrates is formed on one side surface of the casing 2, and an opening end 2a of the casing 2 near the penetrating portion 2a is, for example, semicircular. It is formed by notching the drain inlet 13 in a shape. A filter 14 is attached to the drain inlet 13. 2 and 3, reference numeral 14 denotes a drain pipe 15 connected to the drain port 8b of the drain pump 8 and penetrating the side surface of the housing 2 in the thickness direction.

Since the ceiling cassette type air conditioner 1 is configured as described above, the drain water condensed on the outer surface of the indoor heat exchanger 6 in the housing 2 is removed from the drain plate 7 a of the drain plate 7.
Received and collected. On the other hand, the drain water condensed on the outer surface of the housing 2 is received by the external drain water receiving surface 7ba of the external drain plate portion 7b and collected, and then passes through the drain inlet 13 into the internal drain plate portion 7a. Flows into. The drain water that has flowed into or collected in the in-machine drain plate portion 7a is further collected by gravity into the concave portion 11 along the inclined surface of the inner bottom surface 7c, where the suction port portion of the drain pump 8 It is sucked in by 8 a and drained to the outside by drain pipe 15. As described above, the external drain water can also be drained to the outside, so that inconvenience due to the external drain water can be prevented. For this reason, it is not necessary to omit the heat insulating material 4 of the housing 2 or to configure the housing 2 with a heat insulating structure, so that the cost can be reduced. However, in the present embodiment, the heat insulating material 4
Is attached, the dew condensation itself on the outer surface of the housing 2 can be reduced.

The suction port 8a of the drain pump 8 is connected to both the drain water receiving surfaces 7 of the internal drain plate 7a and the external drain plate 7b.
Since it is at a position lower than ab and 7ba, the drain water in the in-machine drain plate portion 7a and the out-of-device drain plate portion 7b can be collected by gravity into the suction port 8a of the drain pump 8. For this reason, the drainage efficiency can be improved.

The external drain pan 7b is connected to the refrigerant pipe 1
A drain water inlet 13 communicating with the in-machine drain plate 7a is provided in the vicinity of the penetrating portion 12a on the side wall of the casing 2 through which the casing 2 penetrates.
However, since the inside of the housing 2 in which the refrigerant pipe 12 is installed is cut off from the air passage of the blower 5, the drain water inlet 13 is not affected by the air blow.
It can be efficiently introduced into the in-machine drain plate 7a inside the housing 2. Further, since a filter 14 is provided at the drain water inlet 13, it is possible to purify the drain water by the filter 14, and the drain pump 8
Can be prevented or reduced.

FIG. 5 is a longitudinal sectional view of a ceiling cassette type air conditioner 1A according to a second embodiment of the present invention. This ceiling cassette type air conditioner 1A is characterized in that an inner wall drain water receiving surface 7bb is integrally formed at an inner end of an external drain water receiving surface 7ba of an external drain dish portion 7b.

That is, the inner wall drain water receiving surface 7bb is
5 extends in the horizontal direction in FIG. 5 from the inner end of the external drain water receiving surface 7ba to the inside of the casing 2 with a required width, and a flange 7bc rising upward in the figure is formed at the inner end. Drain water is condensed on the inner wall of the building. For this reason, the heat insulating material 4 shown in FIGS. 1 and 2 can be omitted to simplify the configuration and reduce the cost.

[0030]

As described above, according to the present invention, drain water condensed on the outer surface of the casing is received by the external drain plate and collected, and then formed integrally with the external drain plate. And drained out of the housing by a drain pump.

For this reason, dew condensation itself on the outer surface of the housing cannot be prevented, but drain water condensed on the outer surface of the housing can be drained to the outside, so that problems caused by the drain water can be prevented beforehand. Can be. Further, since there is no need to attach a heat insulating material to the housing or to configure the housing to have a heat insulating structure, cost can be reduced.

Further, since the external drain pan and the internal drain pan are integrally formed, these drain pans can be formed easily and with high precision by molding or the like.
Since the number of parts can be reduced, the workability of the assembly work can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a ceiling cassette type air conditioner according to a first embodiment of the present invention.

FIG. 2 is a side sectional view of FIG. 1;

FIG. 3 is an exploded perspective view of the ceiling cassette type air conditioner shown in FIG. 1 and the like.

4A is a plan view of the drain plate shown in FIG. 1 and the like,
(B) is a perspective view of the drain plate.

FIG. 5 is a longitudinal sectional view of a ceiling cassette type air conditioner according to a second embodiment of the present invention.

[Explanation of symbols]

 1, 1A Ceiling cassette type air conditioner 2 Case 2a Open end of case 3 Ceiling plate 4 Insulation material 5 Blower 6 Indoor heat exchanger 7 Drain plate 7a In-machine drain plate 7ab Internal drain water receiving surface 7b Outside drain Dish portion 7ba External drain water receiving surface 7bb Inner wall drain water receiving surface 8 Drain pump 9 Ceiling panel 11 Concave portion 12 Refrigerant pipe 13 Drain inlet 14 Filter

Claims (5)

[Claims] 1. A heat exchanger provided with a blower, an in-machine drain plate for receiving drain water condensed by the heat exchanger, and a drain water in the in-machine drain plate are provided in a housing embedded in the ceiling plate. In a ceiling cassette type air conditioner accommodating a drain pump for draining outside the casing, and an external drain dish formed integrally with the in-board drain dish and receiving drain water condensed on the outer surface of the casing, A ceiling cassette type air conditioner characterized by the following. 2. The ceiling cassette type air conditioner according to claim 1, wherein the suction port of the drain pump is provided at a position lower than a drain water receiving surface of the internal drain pan and the external drain pan. Machine. 3. The external drain tray is configured to cause drain water in the external drain tray to be introduced into the internal drain tray in the housing in the vicinity of the installation location of the housing in which the refrigerant pipe through which the refrigerant passes is installed. The ceiling cassette type air conditioner according to claim 1 or 2, wherein a drain water inlet is formed. 4. The ceiling cassette type air conditioner according to claim 1, wherein a filter is provided at the drain water inlet. 5. The ceiling cassette type air according to claim 1, wherein the external drain tray has a receiving surface that receives drain water condensed on the inner wall of the housing. Harmony machine.