JP3480874B2 - 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, 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 In an air conditioner of this type in which a ceiling-mounted air conditioner is frequently used, a suction port for introducing air in a room to be conditioned and a discharge port for discharging heat-exchanged air are provided on a lower surface side. There is a unit body with.

In order to take advantage of the ceiling-mounted 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. In order to change the distance 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 surface below the heat exchanger and the main body of the unit containing 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. , the heat U-bend and U path constituting the exchanger
Adjacent water of the sub-drain pan facing the U-shaped part of the ip
The end portions of the trays are characterized in that they are connected by auxiliary water receiving plates .

According to a second aspect, the heat exchange is performed on the inclined heat exchanger, the unit main body which accommodates the blower arranged so as to face the inclined heat exchanger, and the projection plane below the heat exchanger. A sub-drain pan that is placed in parallel with the heat exchanger at an arbitrary distance from the vessel and is formed in a stepwise manner, and a main drain pan that receives drain water collected in the sub-drain pan and guides it to the outside. Equipped with the above
The top of the Budren pan is hooked and fixed to the unit body.
The heat exchanger and the main drain pan are
It is characterized by being pinched and fixed by .

A third aspect of the present invention is the sub-device of the second aspect.
Clamped between the drain pan heat exchanger and the main drain pan
The lower end is sandwiched between the sub-drain pan and the heat exchanger.
A stop rib is formed, and this stop rib is
Make line contact with the heat exchanger and keep the distance between the sub-drain pan and the heat exchanger.
Auxiliary ribs are integrally formed to keep the separation constant
Is characterized by.

By providing the means for solving the above problems, in the first aspect of the invention, the drain water dripping from the inclined heat exchanger can be reliably received by the water receiving 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, and the heat exchange is performed.
Drain water dripping from U-bend side constituting the exchanger is complementary
It is dripped on the auxiliary water receiving plate and collected in the sub-drain pan.

According to the second aspect of the invention, the drain water dripping from the inclined heat exchanger is reliably received by the water pan of the sub-drain pan, and the upper part of the sub-drain pan is fixed by a simple operation.
To be done.

According to the third aspect of the invention, the rib on the lower side has heat exchange.
By making line contact with the converter, it is possible to prevent dew condensation.
Ensures that the distance between the heat exchanger and the sub-drain pan is constant.
Can be kept.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an air conditioner in which the indoor unit body 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 main body 1 is opened, and the front panel 4 shields it. The entire panel 4 is exposed on the front surface side (lower surface side) of the ceiling plate 2.

A suction port 5 is opened on one side of the front panel 4 and a discharge port 6 is opened on the other side thereof. 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 blowout port 6, and the sub-drain pan 7 and the inclined lower end portions 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 extends above the other end of the outlet 6, and a blow-out guide plate 10 is provided between the extending end and the end on the outlet 6 side. 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 blowout guide plate 10 and the blow-out guide plate 10 at the lower portion are formed.
A blowout air duct G is formed by the blowout guide plates 11 provided at the opposite positions.

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 this fan motor and whose other end is pivotally supported by a bearing. 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, the heat exchanger 8 has a large number of aluminum fins F arranged side by side with a narrow gap, and a U pipe P penetrates through the fins. 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.

The sub-drain pan 7 is shown in FIGS.
As shown in FIG. 3, a central guide trough 13 is provided in the central portion along the vertical direction, and connecting plates 14 and 14 are provided on both left and right sides.

Left and right connecting plates 1 from the central guide gutter 13
A plurality of water receiving trays 15 are erected at a predetermined interval in the vertical 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 14 side 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 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
5, the upper end draining rib 15b and the lower end rising rib 15c of the water tray 15 located on the lower inclined side are arranged so as to overlap 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 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, mounting ribs 17 having mounting holes 16 are 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 presser pawl 19 and the presser pawl 19 is once bent to allow the mounting rib 17 to pass therethrough. Hook on the bottom side.

Therefore, the central guide trough 13 and each connecting plate 14 can be attached to the unit main body 1 at the same time and with one touch, and a special fixing tool such as a fixing screw is not required, and the operation is easy.

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 mounting ribs 17 on the upper side. 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 which constitute 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 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, and performs a refrigerating cycle operation for the heat exchanger 8 and rotationally drives the blower 12.

Air in the air-conditioned room is sucked into the unit main body 1 through the suction port 5, and the center guide gutter 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 air-conditioned room will be performed.

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 formed on the upper end of each water receiving tray 15 so as to extend downward, the drain water is dropped onto the water receiving trays 15 adjacent to the lower inclined side. be able to. At least, as shown by the broken line in the figure, it does not wrap around along the wall surface of the dish main body 15a and drip from the gap between the water receiving trays 15 .

Moreover, 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 15 adjacent to the lower inclined side.

The drain water of each water 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 portions 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 thereof 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 has 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.

In general, between the heat exchanger and the drain pan, the difference in the fourth power of the absolute temperature of each surface, the view factor determined from the mutual positional relationship, and the heat determined by the surface emissivity of both companies are used. It will be exchanged.

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, the surface has a metallic luster of 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 part of the nose 9a 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.

Since the inside of the sheet metal nose 22 is filled with the styrofoam material that constitutes 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.

At the time of 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 pan 15 is arranged so as to be located on the projection surface of the straight part 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.

[0058]

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 guide trough may be short, the strength is improved, and its position is displaced. Nor.

The U-bend and the heat-exchanger constituting the heat exchanger are
And adjacent sub-drain pan facing the U-shaped part of the U pipe
The ends of the water trays are connected to each other with auxiliary water trays.
So, is it the U-bend of the heat exchanger and the U-shaped part of the U-pipe?
The auxiliary water receiving plate can reliably receive the drain water dripping from
It

According to claim 2, from the inclined heat exchanger
Make sure that the drain water to be dropped is in the water pan of the sub-drain pan.
Received, and hang the upper end of the sub drain pan on the unit body.
The bottom of the heat exchanger and the main drain pan.
Since it is held and fixed, the upper and lower ends of the sub drain pan are simple
It is fixed by work.

According to the third aspect, the stop rib is the heat exchanger.
The main drain pan and the main drain pan securely hold the sub drain
Is fixed. In addition, the sub-drain
Are placed in parallel with the heat exchanger at any distance.
Therefore, 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) Takuya Shimokawa, 336 Tatehara, Fuji, Shizuoka Prefecture, Shizuoka Prefecture, Fuji Factory, Ltd. (72) Koichi Masuda, 336, Tatehara, Fuji City, Shizuoka, Prefecture, Toshiba Corporation, Fuji Factory (56) References JP-A-3-63429 (JP, A) JP-A-4-273922 (JP, A) JP-A-2-282632 (JP, A) Actual development Sho-56-130619 (JP, U) Actual Kai 56-109518 (JP, U) Actual Kai-hei 5-40718 (JP, U) Actual Kai 63-113824 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F24F 1 / 00-1/02

Claims (3)

(57) [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 in the central part of the water pan. A central guide trough having a U-shaped cross-section that guides the drain water dropped on the tray to the main drain pan is provided in series , and the U-bend and U-pipe of the U-pipe that constitute the heat exchanger are formed.
Edge of the adjacent water pan of the sub-drain pan facing the ridge
An air conditioner characterized in that the parts are connected by auxiliary water receiving plates . 2. A unit main body for accommodating an inclined heat exchanger and a blower arranged so as to face the inclined heat exchanger, and an arbitrary heat exchanger from the 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, The upper end of the sub-drain pan is hooked on the unit body.
The heat exchanger and the main drain are
An air conditioner characterized by being sandwiched and fixed with a pan . 3. A heat exchanger and a mains for the sub-drain pan.
The sub-drain pan and heat
When a stopper rib that is sandwiched with the exchanger is formed,
In, the stop for the rib of the child by contact heat exchanger and a line Sabudore
Auxiliary rib that keeps the distance between the pump and the heat exchanger constant
The air conditioner according to claim 2 , wherein the air conditioner is integrally formed .