JPH0926154A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a space efficiency, simplify a forming work and improve an air conditioning capability under an assumption in which there is provided with a sub-train pan for receiving drain water dripped from an inclined heat exchanger. SOLUTION: There are provided a main body 1 for storing an inclined heat exchanger 8 and a blower 12; a sub-drain pan 7 arranged in parallel with a projected plane below the heat exchanger 8 with an optional distance being left in respect to the heat exchanger 8 and formed in a stepped-manner; and a main drain pan 9 receiving drain water accumulated in the sub-drain pan 7, discharging the drain water and guiding it. Then, the sub-drain pan 7 is set such that a plurality of water receiving pans are inclined in respect to a horizontal plane and at the same time the upper and lower ends of the adjoining water receiving pans are over-wrapped to each other in respect to a vertical line and then a central part of each of the plurality of water receiving pans is cooperatively arranged with a central guiding trough of a substantial U-shaped section for guiding drain water dripped into each of the water receiving pans to the main drain pan 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a ceiling-mounted air conditioner, and more particularly to an improvement of a drain water treatment structure dropped from a heat exchanger.

[0002]

2. Description of the Related Art Ceiling-mounted air conditioners are widely used. In this type of air conditioner, there is a unit main body having a suction port for introducing air in the air-conditioned room and a blowout port for blowing out the heat-exchanged air on the lower surface side.

In order to take advantage of the ceiling mount type, it is necessary to make the unit body thin in the vertical direction. Therefore, the heat exchanger arranged in the unit body is not vertically set up, but is inclined at a certain angle.

Drain water is generated in the heat exchanger due to the heat exchange action and is dripped, while the heat exchanger has a structure inclined obliquely. Therefore, the drain pan structure for surely receiving the drain water has been devised. Will be there.

[0005]

As a drain pan of this type, there is a technique disclosed in, for example, Japanese Patent Application Laid-Open No. 3-63429 or Japanese Patent Application Laid-Open No. 3-45834.
That is, a water receiving trough formed in a step-like shape is arranged at a lower portion (on the windward side) of the heat exchanger. This water receiving trough is attached so that the rising rib and the back edge of the tray surface overlap.

In the former (Japanese Patent Laid-Open No. 3-63429), U-shaped guide gutters are provided at both ends of each water receiving trough, and the water receiving troughs are spaced from each other by a cross flow fan. It increases as the distance increases.

In the latter (Japanese Patent Laid-Open No. 3-45834), the shape of the receiving surface of the water receiving trough is arcuate or the nonwoven fabric is attached to the water receiving trough. However, these techniques have the following drawbacks.
That is, the former one guides the U-shaped guide gutters at both ends to the first water pan which is the main drain pan,
This first water tray must be made large, and inevitably an increase in size is achieved. Further, in order to change the interval between the water receiving troughs, it is necessary to raise the ribs or lengthen the receiving tray to wrap the lower rib and the rear edge of the upper receiving tray, which increases the material cost.

Furthermore, since the water receiving gutters are held only by the guide gutters at both ends, the strength of the water receiving gutter is weak, and the central part of the water receiving gutter which is relatively long in the longitudinal direction is bent, and the position of the water receiving gutter is displaced. There is a fear.

In the latter case, it takes time and effort to form the arcuate shape of the receiving surface of the water receiving gutter, and the space efficiency is poor.
By sticking the above-mentioned non-woven fabric, the suction area of the heat exchange air may be reduced, which may lead to a reduction in air conditioning capacity.

The present invention has been made in view of the above circumstances, and an object of the present invention is to arrange a heat exchanger in an obliquely inclined state and to use a sub-drain pan for drain water dropped from the heat exchanger. On the assumption that the air conditioner will be received, the present invention intends to provide an air conditioner capable of improving space efficiency, simplifying molding work, and improving air conditioning capacity.

[0011]

According to a first aspect of the present invention, an air conditioner for satisfying the above object is arranged so as to face an inclined heat exchanger and the inclined heat exchanger. A sub-drain pan, which is arranged in parallel with the heat exchanger at an arbitrary distance from the heat exchanger on the projection plane below the heat exchanger and the main body of the unit that houses the blower. And a main drain pan that receives and guides drain water collected in the sub-drain pan to the outside. The sub-drain pan has a plurality of water trays arranged in a slant with respect to a horizontal plane and adjacent to each other. The upper and lower ends of the water receiving trays are wrapped around each other with respect to a vertical line, and a central guide trough having a U-shaped cross section is continuously provided in the central portion of the water receiving trays for guiding the drain water dropped on each of the water receiving trays to the main drain pan. To do And it features.

A second aspect of the present invention is characterized in that each of the water receiving trays according to the first aspect is inclined downward toward the central guide trough. A third aspect of the present invention is characterized in that the end portions of the water receiving trays according to the first and second aspects are connected by a connecting plate.

Claims 1 to 3 are defined as Claim 4.
In the above heat exchanger described above, a large number of fins are arranged side by side at a predetermined interval, and U-pipes composed of a straight portion and a U-shaped portion are inserted into these fins, and openings of adjacent U pipes are inserted. U-bends are connected to each other to form a meandering flow path, and each of the water pans constituting the sub-drain pan is a projection surface on the air flow upstream side of the straight portion of the U pipe constituting the heat exchanger. It is characterized by being located above.

Claims 1 to 4 are defined as Claim 5.
The U-bend and the U-shaped portion of the U-pipe constituting the heat exchanger described above are connected to each other by water auxiliary end plates of the water pan ends of the sub-drain pan.

Claims 1 to 5 are defined as claim 6.
The water pan that constitutes the sub-drain pan described above is characterized in that the surface facing the heat exchanger is subjected to a surface treatment to reduce the thermal emissivity.

According to a seventh aspect, the surface treatment for lowering the thermal emissivity of the water tray according to the sixth aspect is an aluminum plating treatment. As claim 8,
The surface treatment for reducing the thermal emissivity of the water tray according to the sixth aspect is characterized in that an aluminum tape is attached.

As a ninth aspect, the sub-drain pan according to the first aspect is characterized in that an upper end portion thereof is one-touch engaged and fixed to the unit body, and a lower end portion thereof is sandwiched and fixed by the heat exchanger and the main drain pan. And

In a tenth aspect of the present invention, at the lower end portion which is sandwiched between the heat exchanger and the main drain pan of the sub-drain pan according to the ninth aspect, a stop rib which is sandwiched between the sub-drain pan and the heat exchanger is formed. Along with this, the stop rib is integrally formed with an auxiliary rib that comes into line contact with the heat exchanger to keep the distance between the sub-drain pan and the heat exchanger constant.

By providing the means for solving the above problems, in the first aspect of the invention, the drain water dropped from the inclined heat exchanger can be reliably received by the water tray of the sub-drain pan. Then, the drain water is guided from the water tray to the main drain pan through the central guide gutter.

According to the second aspect of the present invention, the drain water received by each water receiving tray is reliably guided to the central guide trough. Claim 3
In the invention, the strength of the sub-drain pan is improved by the connecting plate, and the intervals between the water pans can be accurately set.

According to the fourth aspect of the invention, it is possible to prevent the water tray from becoming a ventilation resistance as much as possible. In the invention of claim 5, the drain water dropped from the U-bend side forming the heat exchanger is dropped on the auxiliary water receiving plate and collected in the sub-drain pan.

According to the sixth to eighth aspects of the present invention, the heat exchange amount of the sub-drain pan is reduced, and the surface temperature drop on the upstream side is suppressed to avoid surface dew condensation. In the invention of claim 9, the upper portion of the sub-drain pan is fixed by a simple operation.

According to the tenth aspect of the present invention, the ribs on the lower side are in line contact with the heat exchanger to prevent dew condensation and ensure that the distance between the heat exchanger and the sub-drain pan is kept constant. You can

[0024]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an air conditioner whose indoor unit is a ceiling-mounted type. The unit body 1 is inserted into an attachment opening 3 provided in the ceiling plate 2. The lower end of the unit body 1 is opened, and the front panel 4
Shields. The front panel 4 is exposed on the front surface side (lower surface side) of the ceiling plate 2.

The front panel 4 has a suction port 5 on one side and a discharge port 6 on the other side. In the unit main body 1, at a position facing the suction port 5,
A sub-drain pan 7 to be described later, which is formed obliquely, is arranged, and a heat exchanger 8 which is formed obliquely is arranged inside the sub-drain pan 7.

A main drain pan 9 is arranged between the suction port 5 and the discharge port 6, and the sub-drain pan 7 and the inclined lower end portion of the heat exchanger 8 are mounted on the main drain pan 9. The main drain pan 9 is connected to a drainage channel (not shown) that receives the drain water collected and guides it to the outside.

One end of the main drain pan 9 is extended above the side end of the blowout port 6, and a blowout guide plate 10 is provided between the extended end and the blowout port 6 side end. It is installed. A blowout guide plate 11 is also provided on the opposite side of the blowout port 6. This guide plate 11 is the unit body 1
It is bent inward and extended to the upper end of the heat exchanger 8.

A blower 12 is arranged between the blowout guide plate 11 and the end of the main drain pan 9. By rotating the blower 12, the air in the air-conditioned room is sucked into the unit main body 1 from the suction port 5, passes through the gap formed in the sub-drain pan 7 and is guided to the heat exchanger 8, and the blower 12 is further blown. It is designed to be blown out from the blowout port 6 via.

Therefore, the end of the main drain pan 9 near the lower portion of the blower 12 forms a nose 9a, and the blower guide 10 at this lower portion and the blower guide 11 provided at the opposite position blow off the blower air passage. G is formed.

Although not shown in detail here, the blower 12 is composed of a fan motor and a cross-flow fan whose one end is connected to the rotation shaft of the fan motor and whose other end is pivotally supported by the bearing tool. Composed. The axial length of the cross flow fan is formed to be the same as the width dimension of the heat exchanger, and is opposed to each other.

As shown in FIGS. 2 and 3, in the heat exchanger 8, a large number of aluminum fins F are arranged side by side with a narrow gap, and a U pipe P penetrates through the aluminum fins F. The one open ends of the adjacent U pipes P are connected to each other by the U bend B, so that a meandering flow path is formed.

As shown in FIGS. 1 and 2, the aluminum fins F have a parallelogram shape and are arranged in a state of being inclined with respect to a vertical line in a side view. With respect to such aluminum fins F, the U pipes P are arranged in three rows in the width direction. Then, the U pipes P are positioned so as to be aligned in the vertical direction.

As shown in FIGS. 1 to 3, the sub-drain pan is provided with a central guide trough 13 at the center thereof along the vertical direction, and connecting plates 14 and 14 at both left and right sides.

From the central guide gutter 13 to the left and right connecting plates 1
A plurality of water trays 15 ... Are erected at a predetermined interval in the up-down direction from 4 to 14. Each of the water trays 15 is arranged to be inclined with respect to the horizontal plane so that the central guide trough 13 side is low and the connecting plate side 14 is high, and is inclined downward toward the central guide trough 13.

The upper and lower ends of the adjacent water trays 15 and 15 are wrapped around each other with respect to a vertical line. Explaining in more detail, as shown in FIG.
Is a dish main body 15a which is oriented at a predetermined inclination angle, a draining rib 15b which is integrally bent at the upper end of the dish main body 15a below the inclined surface, and a lower end of the dish main body 15a which is integrally formed above the inclined surface. The rising rib 15c is bent and bent at an angle close to the vertical line L.

The water tray 1 located on the upper side of the slope
The upper end draining rib 15b of No. 5 and the lower end rising rib 15c of the water tray 15 located on the lower inclined side are arranged so as to wrap with respect to the vertical line L.

On the other hand, the central guide trough 13 has a U-shaped cross section, and the end portions of the water receiving trays 15 are connected to both side surfaces of the central guide trough 13.
Communicating with each other. The connecting plate 14 is used for each water tray 1
The side end opening 5 is closed.

As shown in FIG. 5, a mounting rib 17 having a mounting hole 16 is integrally provided at the upper ends of the central guide trough 13 and each connecting plate 14. On the other hand, on the unit main body 1 side, a hooking projection 18 and a pressing claw 19 are provided so as to project close to each other.

By inserting the mounting hole 16 into the hooking projection 18, the tip of the mounting rib 17 comes into contact with the pressing claw 19, and the pressing claw 19 once bends to allow the mounting rib 17 to pass. Latch on the bottom side.

Therefore, the central guide trough 13 and the connecting plates 14 can be attached to the unit body 1 at the same time and with one touch, and no special fixing tool such as a fixing screw is required, which facilitates the work.

On the other hand, as shown in FIGS. 3 and 6, a rectangular flat plate is integrally connected to the lower ends of the central guide trough 13 and each connecting plate 14, and the stop ribs 20 are formed by these. It is formed.

On the heat exchanger 8 side of this stop rib 20,
An auxiliary rib 20a for keeping a constant distance from each other is formed in an elongated shape so that the sub-drain pan 7 does not come into contact with the heat exchanger 8.

All the stop ribs 20 are sandwiched between the heat exchanger 8 and the ends of the main drain pan 9 and fixed together with the upper mounting ribs 17. The sub-drain pan 7 has an auxiliary rib 20 as shown in FIG. 2 and FIG.
It is arranged in parallel with the heat exchanger 8 with an arbitrary distance S from the heat exchanger 8 by a.

U-bends B and U constituting the heat exchanger 8
The sub-drain pan 7 facing the U-shaped portion of the pipe P is connected at its ends with the water receiving tray 15 by an auxiliary water receiving plate 21.
In other words, the auxiliary water receiving plate 21 is located below the U-shaped portions of the U bend B and the U pipe P.

The air conditioner is provided with the heat exchanger 8 and the sub-drain pan 7 configured as described above. The refrigerating cycle operation is performed on the heat exchanger 8 and the blower 12 is rotationally driven.

Air in the air-conditioned room is sucked into the unit main body 1 through the suction port 5, and the central guide trough 13 of the sub drain pan 7 is provided.
And is guided to the heat exchanger 8 through a gap formed between the connection plate 14, the water tray 15 and the like.

Here, after exchanging heat with the refrigerant guided through the flow path formed by the U pipe P and the U bend B, it is blown out from the blow-out port 6 through the blower guide path G. That is, air conditioning of the room to be air-conditioned is achieved.

The heat exchanger 8 has a function of heat exchange.
Moisture contained in the air in the air-conditioned room is condensed. The surface of the heat exchanger 8 is cooled below the dew point and drain water is generated. The drain water is dropped and directly received by the sub drain pan 7 and the main drain pan 9.

As shown in FIG. 4, since draining ribs 15b are integrally provided at the upper end of each water receiving tray 15 toward the lower side of the slope, drain water is dripped onto the water receiving tray 15 adjacent to the lower side of the slope. be able to. At least, as shown by the broken line in the figure, there is no wraparound along the wall surface of the dish main body 15a and dripping from the gap between the water receiving trays.

In addition, the water tray 1 located on the upper side of the slope
The upper end draining rib 15b of 5 and the lower end rising rib 15c of the water tray 15 located on the lower inclined side are arranged so as to wrap with respect to the vertical line L.
The drain water dripping from b is reliably received by the rising ribs 15c of the water tray adjacent to the lower inclined side.

The drain water of each water receiving tray 15 flows along this slope and is guided to the central guide trough 13 connected to the lower end of the slope. Since this central guide gutter 13 communicates with the main drain pan 9, all drain water is collected in the main drain pan 9.

In particular, the U-bend B of the heat exchanger 8 and the U-shaped portion of the U-pipe P also have a portion facing each other between the water receiving trays 15, so the drain water dropped from this portion drops into these gaps. By the way, it is received by the auxiliary water receiving plate 21 installed here, and is guided to the lower water receiving tray 15.

The heat exchanger 8 is cooled with the operation of the refrigeration cycle, and the temperature becomes much lower than that of the sub-drain pan 7. However, the sub-drain pan 7 is arranged in parallel with the heat exchanger 8 with a narrow space S, and is easily affected by heat from the heat exchanger.

That is, the sub-drain pan 7 is the heat exchanger 8
It is cooled by receiving heat radiation from it. If the sub-drain pan 7 is not treated at all, the sub-drain pan 7 is cooled, drain water is generated on the upstream side, and the drain water is dropped.

Generally, between the heat exchanger and the drain pan, it is determined by the difference in the fourth power of the absolute temperature of each surface, the view factor determined from the mutual positional relationship, and the surface emissivity of both. It is said that heat exchange is performed.

Now, assuming that the absolute temperatures of both surfaces, the view factor, and the surface emissivity of the heat exchanger are the same, the amount of heat exchange depends on the magnitude of the surface emissivity of the sub-drain pan. That is, compared with the case where the surface emissivity of the drain pan is 0.9 or more as in the case of a black resin, for a metallic glossy surface, it is 0.1 or less, and the heat exchange amount can be reduced to 1/9 or less. .

Therefore, as shown in FIG. 7, the entire surface facing the heat exchanger 8 is a sub-drain pan 7A which is surface-treated so as to have a low thermal emissivity. Specifically, the surface of the sub drain pan 7A made of a resin molded product is subjected to aluminum plating.

As a result, the amount of heat exchanged with the heat exchanger 8 is reduced, the temperature drop on the upstream surface is suppressed, and the occurrence of surface dew condensation is prevented. Further, as shown in FIG. 8, the sub-drain pan 7 is an ordinary molded product, and the auxiliary water receiving plate 2
By sticking the aluminum tape T on 1, the same effect can be expected.

By carrying out such a surface treatment, the flocking process, which was conventionally required for preventing dew condensation, is not required anymore this time, which contributes to cost reduction. As shown in FIG. 9, the main drain pan 9 is formed using a styrofoam material having excellent heat insulating properties. Therefore, the drain water and the sub-drain pan 7 that fall from the heat exchanger 8
Condensation does not occur on the surface even when the drain water introduced from is stored and cooled.

Then, here, the nose 22 made of sheet metal is inserted into the nose 9a which is integrally formed at the end on the side of the blower 12. As shown in FIG. 10, this sheet metal nose 22 is provided with a large number of holes 23 at appropriate positions, and in the state where the nose 22 is fixed in the mold of the main drain pan 9, the expanded polystyrene material is injection molded.

Therefore, the resin main drain pan 9 and
The sheet metal nose 22 can be integrated, the number of parts can be reduced, and the mounting becomes easy. The positioning of the nose 9a can be performed at the same time as the positioning of the drain pan 9, so that the mounting adjustment is unnecessary.

The inside of the sheet metal nose 22 is filled with the expanded polystyrene material forming the main drain pan 9,
No condensation inside the nose. Since the nose 22 made of sheet metal is provided, the rigidity can be secured more than the case where the nose is provided in the main drain pan 9 made only of the polystyrene foam material, and the blower 12 is provided.
It is easy to obtain the dimensional accuracy of the gap of the nose 9a with respect to.

When molding the main drain pan 9, the precision of the mold for the nose 9a portion is low, which leads to the advantage of suppressing mold investment. Further, the relationship between the straight portion of the U pipe P and the water receiving tray 15 of the sub drain pan 7 may be as shown in FIG.

That is, in the figure, the sub-drain pan 7
The water receiving tray 15 is arranged so as to be located on the projection surface of the straight portion of each U pipe P on the upstream side of the air flow. According to this, even if the water tray 15 becomes the ventilation resistance of the airflow flowing into the heat exchanger 8, the projection on the upstream side of the straight portion of each U pipe P, which is a portion having a large ventilation resistance as the heat exchanger alone. Since it is located on the surface, there is no ventilation resistance between the straight portions of the U pipes P having a small ventilation resistance, and the heat exchange efficiency of the heat exchanger 8 is not reduced.

[0065]

As described above, according to the invention of claim 1, stepwise sub-drain pans are arranged in parallel at an arbitrary distance on the downward projection plane of the inclined heat exchanger. In the sub-drain pan, a plurality of water pans are tilted, the upper and lower ends of the adjacent water pans are wrapped around a vertical line, and a central guide trough with a U-shaped cross section that guides drain water to the main drain pan is connected in the center. Therefore, the drain pan of the sub-drain pan surely receives the drain water dripping from the inclined heat exchanger,
It is surely guided to the main drain pan via the central guide gutter. Therefore, it is possible to improve the space efficiency, simplify the molding work, and improve the air conditioning capacity.

Further, since the central guide trough is located in the central portion of the water receiving tray which is relatively long in the longitudinal direction, the length of the water receiving trays on both sides of the central guiding trough may be short, the strength is improved, and its position is displaced. Nor.

According to the second aspect, since each water tray is provided so as to be inclined downward toward the central guide trough, the drain water received by the water tray of the sub-drain pan can be smoothly guided to the central guide trough. .

According to claim 3, the end of each water tray is
Since they are connected by the connecting plate, the strength of the sub-drain pan is improved, and the intervals between the water pans can be accurately set.

According to the fourth aspect of the present invention, in the heat exchanger, a large number of fins, a U pipe having a straight line portion and a U-shaped portion that are fitted into these fins, and the open ends of the adjacent U pipes are connected to each other. It is composed of a U-bend that communicates with each other, and each water receiving tray is located on the projection surface of the straight portion of the U pipe on the upstream side of the air flow. Therefore, it is possible to avoid the water receiving tray becoming a ventilation resistance as much as possible.

According to the fifth aspect, the U constituting the heat exchanger is formed.
Since the water pan ends of the sub-drain pan facing the U-shaped part of the bend and the U pipe are connected by the auxiliary water receiving plate, the drain water dripping from the U-shaped part of the U-bend and the U pipe can be collected. The auxiliary water receiving plate can be reliably received.

According to the sixth aspect, since the surface of the water tray facing the heat exchanger is surface-treated to reduce the thermal emissivity,
According to claim 7, the surface treatment for lowering the thermal emissivity of the water pan is aluminum plating treatment. Therefore, according to claim 8, the surface treatment for lowering the thermal emissivity of the water pan is aluminum. Since the tape is attached, the heat exchange amount of the sub-drain pan due to the heat radiation of the heat exchanger can be reduced and the surface temperature can be prevented from lowering to prevent the formation of dew condensation.

According to claim 9, the upper end portion of the sub-drain pan is fixed to the unit body by one-touch engagement, and the lower end portion is sandwiched and fixed by the heat exchanger and the main drain pan. Fixed by.

According to the tenth aspect, a stop rib is formed at the lower end portion of the sub-drain pan, and the stop rib is in line contact with the heat exchanger to keep the distance between the sub-drain pan and the heat exchanger constant. Since the auxiliary rib for keeping is integrally formed, the stop rib is sandwiched between the heat exchanger and the main drain pan, and the sub drain pan is securely fixed. Further, since the sub-drain pan is arranged in parallel with the heat exchanger with an arbitrary distance by the auxiliary rib, it is possible to prevent dew condensation on the sub-drain pan.

[Brief description of drawings]

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

FIG. 2 is a side view illustrating the arrangement of a heat exchanger, a sub drain pan, and a main drain pan according to the same embodiment.

FIG. 3 is a front view of the sub-drain pan of the same embodiment,
The figure explaining the position of the heat exchanger component with respect to the sub drain pan.

FIG. 4 is a vertical cross-sectional view of a water pan that constitutes the sub-drain pan according to the same embodiment.

FIG. 5 is an exploded view for explaining the mounting structure of the upper end portion of the sub-drain pan according to the same embodiment.

FIG. 6 is a side view illustrating the lower end structure of the sub-drain pan according to the same embodiment.

FIG. 7 is a front view of a sub-drain pan according to another embodiment.

FIG. 8 is a front view of a sub-drain pan according to still another embodiment.

FIG. 9 is a vertical sectional view of a main drain pan according to still another embodiment.

FIG. 10 is a perspective view of the sheet metal nose according to the embodiment.

FIG. 11 is a side view for explaining the arrangement of heat exchangers and sub-drain pans according to still another embodiment.

[Explanation of symbols]

8 ... Heat exchanger, 12 ... Blower, 1 ... Unit body, 7 ...
Sub-drain pan, 9 ... Main drain pan, 15 ... Water pan, 13 ... Central guide trough, 14 ... Connecting plate, F ... Fin, P
... U pipe, B ... U bend, 21 ... Auxiliary water receiving plate, 20
… Stop ribs.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takuya Shimokawa 336 Tatehara, Fuji City, Shizuoka Prefecture, Toshiba Corporation Fuji Factory (72) Inventor Koichi Masuda 336 Tatehara, Fuji City, Shizuoka Prefecture Toshiba Fuji Factory, Ltd.

Claims (10)

[Claims] 1. A unit main body for accommodating an inclined heat exchanger and a blower arranged so as to face the inclined heat exchanger, and a heat exchanger on a projection plane below the heat exchanger. A sub-drain pan that is arranged in parallel with the heat exchanger at a distance of, and is formed in a staircase, and a main drain pan that receives drain water collected in the sub-drain pan and guides it to the outside, In the sub-drain pan, a plurality of water pans are arranged so as to be inclined with respect to the horizontal plane, the upper and lower ends of the adjacent water pans wrap each other with respect to a vertical line, and each water pan is placed at the center of the water pan. An air conditioner characterized in that a central guide gutter having a U-shaped cross section is continuously provided to guide the drain water dropped on the tray to the main drain pan. 2. The air conditioner according to claim 1, wherein each of the water trays is inclined downward toward the central guide gutter. 3. The air conditioner according to claim 1 or 2, wherein the ends of the water trays are connected by a connecting plate. 4. In the heat exchanger, a large number of fins are arranged side by side at predetermined intervals, and a U pipe consisting of a straight line portion and a U-shaped portion is inserted into these fins so as to be adjacent to each other. A U-bend connects the open ends of the pipes to each other to form a meandering flow path. Each of the water pans constituting the sub-drain pan is an air flow upstream side of a straight portion of the U pipe constituting the heat exchanger. The projection surface is located on the projection plane of
The air conditioner as described. 5. A U bend and a U constituting the heat exchanger.
The air conditioner according to any one of claims 1 to 4, wherein ends of adjacent water receiving pans of the sub-drain pan facing the U-shaped part of the pipe are connected to each other by an auxiliary water receiving plate. 6. The air according to claim 1, wherein the water tray constituting the sub-drain pan is surface-treated so that the surface facing the heat exchanger has a low thermal emissivity. Harmony machine. 7. The air conditioner according to claim 6, wherein the surface treatment for reducing the thermal emissivity of the water tray is an aluminum plating treatment. 8. The air conditioner according to claim 6, wherein the surface treatment for reducing the thermal emissivity of the water tray is performed by attaching an aluminum tape. 9. The air according to claim 1, wherein the sub-drain pan has an upper end fixed to the unit body by one-touch engagement, and a lower end clamped and held by the heat exchanger and the main drain pan. Harmony machine. 10. A stopper rib sandwiched between the sub-drain pan and the heat exchanger is formed at a lower end portion sandwiched between the heat exchanger and the main drain pan of the sub-drain pan, and the stopper rib is formed on the stopper rib. The air conditioner according to claim 9, wherein auxiliary ribs are integrally formed to maintain a constant distance between the sub-drain pan and the heat exchanger by being in line contact with the heat exchanger.