JP3297327B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art In recent years, there has been known an air conditioner which, in response to a tendency to prefer a large living room, secures a good temperature distribution in a room by two-way blowing. This type of air conditioner has a schematic configuration shown in FIG . That is, two sets of indoor heat exchangers a, a are arranged in a unit main body A attached to the ceiling in a state in which the indoor heat exchangers a, a are formed. Two indoor blowers b, b are disposed to face the inclined upper sides of the indoor heat exchangers a, a, respectively.

[0003] The unit body A has an opening at the bottom surface closed by a decorative panel c, and a casing part excluding the decorative panel c is located behind the ceiling, and the decorative panel c is exposed to the indoor ceiling surface. .

At the center of the decorative panel c, a grill d is provided.
The suction port f into which the filter e is fitted in a two-stage
Provided. The two sides of this inlet f are the outlets g, g
It has become.

Further, a drain pan i is arranged on the inner side of the decorative panel c along both sides of the suction port f . The heat exchanger a is assembled in a state where the lower end of the heat exchanger a enters the drain pan i.

[0006]

Conventionally, there is no problem with the air-conditioning function of the above configuration, but in particular, there is a problem in the treatment of the drain water generated in the heat exchanger a during the cooling operation. Had occurred.

That is, in order to suppress the height dimension of the unit main body A, there is a possibility that drain water may drop in the middle of the heat exchanger a because the heat exchanger a is inclined and disposed in a C shape. . The drain water may fall on the filter e fitted into the suction port f , and eventually scatter in the room to be air-conditioned, which is a living space, and impair comfortable air conditioning.

Therefore, at a predetermined interval on the inclined lower surface side of each heat exchanger a, while receiving the drain water dripped from the heat exchangers, the sub-drain pans j, j having openings h for conducting heat exchange air. The idea of arranging has been devised.

Therefore, it is possible to receive the drain water dripped directly from each of the heat exchangers a, a.
It has been found that the setting of the distance between the heat exchanger a and the sub-drain pan j affects the occurrence of new dew condensation in the sub-drain pan j and the heat exchange efficiency.

In other words, in such an air conditioner, the flow rate of the heat exchange air tends to be lower as the distance from the inlet f increases (the heat exchangers a, apex portions where the heat exchangers a contact each other). In addition, relatively light high-humidity air before heat exchange tends to stagnate in this portion.

In such a case, when the sub-drain pan j is disposed close to the heat exchanger a in a state close to the contact,
Since the sub-drain pan j is cooled by the radiant heat from the heat exchanger a or low-temperature drain water, when the high humidity air that has become in contact with the sub-drain pan j, drain water is generated on the outer surface side and eventually falls down.

As a countermeasure, as shown in FIG. 7 , the sub-drain pan j is separated from the heat exchanger a by a sufficient distance k. In this case, the distance k between the heat exchanger a and the sub-drain pan j is the same at any position and is parallel to each other.

That is, since the heat exchanger a and the sub-drain pan j are separated from each other by a sufficient distance k, the sub-drain pan j is not affected by the radiant heat from the heat exchanger a and has a high height. Drain water is not generated on the outer surface side even if it comes in contact with wet air.

On the other hand, the suction area m (indicated by hatching in the figure) m, which is a space between the heat exchangers a, a becomes small, and the heat exchange efficiency decreases. As shown in FIG. 8 , the sub-drain pan j is integrally formed with a water tray p inclined at a predetermined angle θ with respect to the vertical line nn and a heat exchanger facing end of the water tray p. And a rising portion r integrally bent upward at the opposite end.

Although the falling portion q is disposed so as to face the heat exchanger a, even if the falling portion q is hardly affected by the radiant heat from the heat exchanger a and the contact region in which the suction region can be widened, the falling portion q is searched. Is set, the heat exchange air is guided in the direction along the inclination of the water tray p, and the falling portion q
It is difficult for the heat exchange air to flow to the projected part of the heat exchanger a.

This projected portion becomes a so-called heat exchange air stagnation area (cooling layer), and becomes extremely susceptible to radiant cooling heat from the heat exchanger a, so that the sub-drain pan j is cooled only at the falling portion q. Therefore, there is a possibility that dew condensation occurs in this portion and the portion falls.

Further, since the temperature of the drain water is low, the water receiving tray p is cooled. On the other hand, since the humid air comes into contact with the outer surface side, dew condensation easily occurs. In order to prevent this, as shown in FIG. 9 , a heat insulating material t is stuck on the inner surface side of the water receiving tray p and the rising part r to eliminate direct contact with the drain water and prevent the temperature from lowering. is there.

However, since the amount of collected drain water in the water receiving tray p decreases and the heat insulating material t is adhered over the entire surface of the water receiving tray p and the rising portion r, the required area of the heat insulating material becomes large. Parts cost is high.

Since the water receiving tray p and the rising portion r are bent at a substantially right angle, the heat exchange air guided along the outer surface side of the water receiving tray p collides to generate a vortex and stay. . Since the heat exchange air is highly humid, there is also a risk of dew condensation here.

The present invention has been made in view of the above circumstances, and an object of the present invention is to dispose it in an inclined shape in a C-shape.
And a pair of heat exchangers
The ideal distance between a pair of sub-drain pans arranged in a U-shape is set to prevent accumulation of high-humidity air in any area, to suppress the occurrence of condensation in the sub-drain pan, and to maximize the suction area. The purpose of the present invention is to provide an air conditioner that secures a limited amount of heat and improves heat exchange efficiency, secures an air volume, reduces noise, and provides comfortable air conditioning.

[0021]

Means for Solving the Problems The air conditioner of the present invention to satisfy the above object, as claimed in claim 1, the center of the lower surface
The air inlet is provided with an air conditioner body having outlets on both sides of the air inlet, and in the air conditioner main body, the air inlet is arranged in a C shape in a state of being obliquely inclined to face the air inlet.
A pair of heat exchangers, and each of the heat exchangers and each of the above-described blowouts
A pair of blower is disposed opposite to the mouth, on the projection plane below the respective heat exchangers, it is <br/> arranged in the form of a slanted roof when facing the heat exchanger, each heat exchanger A pair of sub-drain pans that are formed in a stepwise manner so as to have a space for conducting heat exchange air, and a main drain pan that receives drain water from the sub-drain pan and drains the water to the outside. Air conditioner

Each sub-drain for each heat exchanger
The bread distance should be linear from bottom to top
The sub-drain pans are arranged to be spaced apart from each other, and the sub-drain pans are inclined at a predetermined angle with respect to a vertical line and are parallel to each other in a horizontal direction. comprising a falling edge which is bent integrally downward section and a rising section which is bent to integrally upwardly at the opposite end to the heat exchanger of the respective water receiving tray, each <br /> The distance of the falling part from the heat exchanger is aligned with the above straight line.
Ete characterized in that it is arranged spaced apart successively on a large toward the lower side to the upper side is a water receiving tray folded portion.

By providing the means for solving the above-mentioned problems, the present invention provides an inclined arrangement in a C-shape.
High-humidity air before heat exchange sucked into the pair of heat exchangers is guided smoothly without stagnation, and partial cooling of the drain pan by the heat exchanger is removed to prevent dew condensation and suction. The area is expanded and the heat exchange efficiency is improved.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. It has the configuration of an indoor unit that is an air conditioner as shown in FIG. In the figure, reference numeral 1 denotes a unit main body, which is an air conditioner main body, which is suspended from above the ceiling via a hanging tool (not shown). The lower surface side of the unit body is a decorative panel 2 which is exposed from the ceiling plate 3. That is, the unit main body 1 is mounted in an embedded state behind the ceiling.

The decorative panel 2 is on the same plane as the ceiling panel 3,
A suction port 4 is provided at the center except for both sides, and on both sides
The outlets 5a and 5b are provided. A suction grille 6 and a filter 7 are fitted into the suction port 4 . Each blowout
The louvers 8 are provided at the outlets 5a and 5b to guide the blowout in different directions.

A fan casing 9 is adhered to the inner peripheral surface of the unit body 1. A pair of indoor heat exchangers 11a and 11b and an indoor blower 1
2a and 12b are arranged facing each other.

The indoor heat exchangers 11a and 11b have their upper ends close to each other and their lower ends separated from each other, and each of them is inclined inward.

A drain pan 13 for collecting drain water flowing down from the heat exchanger is disposed opposite to the lower ends of the indoor heat exchangers 11a and 11b. This drain pan 1
Noses 13a and 13b are integrally formed on both side end portions of 3.

Further, sub-drain pans 14, 14 which are formed in a U-shape in the same manner as the heat exchangers are disposed on the inclined lower surfaces of the indoor heat exchangers 11a, 11b, and the lower ends thereof are formed as described above. It is supported by the drain pan 13.

In the unit body 1, each
Two air passages 15a, 15 leading to the outlets 5a, 5b
b is formed. That is, each ventilation path 15a, 1
5b is suction heat exchange air ceiling plate 3 the lower portion of the air-conditioned room R
It is taken into the internal space chamber 10 of the unit main body 1 from the inlet 4 to make the indoor heat exchangers 11a and 11b conductive, and the indoor blower 1
Nose 13 between 2a, 12b and outlet 5a, 5b
The air is guided through the outlets 5a and 5b , and the air is guided again into the room R to be air-conditioned.

Here, the heat exchange air blown out from one outlet 5a is directed toward the zone X of the room R to be conditioned, and the heat exchange air blown out from the other outlet 5b is:
The air-conditioned room R is directed toward the zone Y.

Next, the sub-drain pan 14 will be described in detail. As shown in FIG. 3, the sub-drain pan 14
A central guide gutter 16 is provided along the vertical direction at the center thereof, end plates 17 are provided on both left and right sides, and between the central guide gutter 16 and both end plates 17 is not shown in parallel with them. A connecting plate is provided.

A plurality of water trays 18 are provided at predetermined intervals in the vertical direction from the central guide gutter 16 to the left and right end plates 17 via the left and right connecting plates. Each water tray 1
8 is the lowest on the center guide gutter 16 side, and
It is arranged to be inclined with respect to the horizontal plane Z so as to gradually increase over the seven sides. In other words, it is inclined downward from the end plates 17 toward the central guide gutter 16.

The center guide gutter 16 has a U-shaped cross section, and the end of each water tray 18 is connected to both sides thereof.
Communicating with each other. The connecting plate supports the bottoms of the respective water trays 18, and the flow of the drain water in the water trays does not hinder at all. The end plate 17 closes a side end opening of each water receiving tray 18.

The rectangular plate pieces 19 provided at the lower ends of the central guide gutter 16 and the end plate 17 are inserted between the lower ends of the indoor heat exchangers 11a and 11b and the drain pan 13, respectively. The lower end of the sub drain pan 14 is supported.

As shown in FIG. 2, each water tray 18 is
It is oriented at a predetermined inclination angle α with respect to the vertical line L.
At the upper end of the water receiving tray 18, a falling part 19 which is bent integrally downward is provided. At the lower end of the water receiving tray 18, a rising portion 20 that is integrally bent upward is provided. Here, both the falling portion 19 and the rising portion 20 are bent at substantially 90 ° with respect to the water receiving tray 18.

The water trays 18 are provided obliquely at predetermined intervals. A gap between the water receiving trays 18 is a conduction opening 21 for conducting heat exchange air.

The distance between the sub-drain pans 14, 14 with respect to the indoor heat exchangers 11a, 11b is set so as to gradually increase from the lower side toward the upper side. That is, the lower end of the sub-drain pan 14 and the indoor heat exchanger 11
When the distance between the upper and lower ends of the sub-drain pan 14 and the indoor heat exchangers 11a and 11b is Sb, the lowermost falling portion 19 is set so that Sa <Sb .
From the top to the falling section 19 at the top .

The indoor heat exchanger 1 constructed as described above
1a, 11b, drain pan 13 and sub drain pan 1
An air conditioner provided with an indoor heat exchanger 11
a, while performing the refrigeration cycle operation for 11b,
The indoor blowers 12a and 12b are rotationally driven.

The air to be conditioned is sucked into the unit main body 1 from the suction port 4 and passes through the conduction opening 21 formed in the sub-drain pan 14, so that the indoor heat exchangers 11a and 11b
It is led to. Since the opening portion for conduction 21 has a sufficient opening area, the resistance for conducting heat exchange air is minimized.

The heat exchange air is supplied to the indoor heat exchangers 11a and 11b.
After exchanging heat with the refrigerant guided to the blast guide passage 15a,
The air is blown out from each of the air outlets 5a and 5b through the air outlet 15b.
That is, air conditioning of the room to be conditioned is achieved.

Each of the indoor heat exchangers 11a and 11b condenses the moisture contained in the air to be conditioned by the heat exchange action. This surface is cooled below the dew point, producing drain water. Usually, this drain water is supplied to the indoor heat exchangers 11a, 11a.
b, and the drain pan 1
It falls to 3 and is collected.

The effect of the hydrophilic treatment applied to the indoor heat exchangers 11a and 11b may be weakened by aging over a long period of use. In such a state, the drain water falls before reaching the lower ends of the indoor heat exchangers 11a and 11b.

Drain water dropped from the indoor heat exchangers 11a and 11b is received by sub-drain pans 14 and 14 disposed below the drain water. That is, the sub drain pan 1
4 and is collected in a concave portion formed by the water receiving tray 18 and the rising portion 20.

The drain water flows along the horizontal inclined surface of the water receiving tray 18 and is finally led to the central guide gutter 16. The lower end of the central guide gutter 16 is connected to the drain pan 13
, All drain water is collected in the drain pan 13 and discharged to the outside. In this way, it is possible to prevent the drain water from dropping into the room R to be air-conditioned from the suction port 4 and to ensure comfortable air-conditioning.

On the other hand, the distance between the sub-drain pans 14, 14 with respect to the indoor heat exchangers 11a, 11b is set so as to gradually increase from the lower side to the upper side, so that the high-humidity air as heat exchange air is provided. Indoor heat exchanger 1 at the deepest position far away from the suction port 4 where
Partial cooling of the sub-drain pan 14 due to the influence of the cold heat of 1a and 11b can be reduced, and the occurrence of condensation can be prevented.

Although the distance to the indoor heat exchangers 11a and 11b is small at the lower part near the suction port 4 , the temperature of the sub-drain pan is lowered due to the indoor atmosphere because the flow rate of the heat exchange air is large. Saves time and does not condense.

Further, as compared with the conventional case where the distance between the indoor heat exchanger and the sub-drain pan is simply increased,
The expansion of the suction area can be obtained, and the heat exchange efficiency can be improved. As shown in FIG. 4, a water receiving tray 18A and a falling portion 19 are provided.
The sub-drain pan 14A provided with A may be used. Here, the individual water trays 1 constituting the sub-drain pan 14A
8A, the indoor heat exchanger (1 in FIG.
The distance to 1a) is the water receiving tray 18A of the falling part 19A.
It is formed so as to be narrower than the distance to the upper side which is the bent portion.

That is, in the water receiving tray 18A at a predetermined portion, the falling part 19 provided integrally with the water receiving tray 18A is provided.
A is the distance S from the lower end to the indoor heat exchanger 11a.
Sx <Sy, where x is the distance Sy from the upper end of the falling portion 19A to the indoor heat exchanger 11a.

The distance between the indoor heat exchangers 11a and 11b at the lowermost falling portion 19A and the uppermost falling portion 19A is equal to the distance between Sa and Sb as shown in FIG. So that they are aligned on a straight line.

Therefore, on the upper side of the falling portion 19A where the distance is large, the heat exchange air easily enters the back side of the falling portion 19A. Under the influence of the heat exchange air, the stagnation area (cooling layer) of the heat exchange air with respect to the indoor heat exchangers 11a and 11b is reduced, and the partial cooling due to the radiant cooling heat of the indoor heat exchanger can be reduced. The occurrence of dew condensation is prevented.

The falling portions 19A provided integrally with the water receiving tray 18A are arranged so as to be aligned with each other, so that the air volume can be secured and the noise can be reduced. As shown in FIG. 5, a sub-drain pan 14B having a water receiving tray 18B and a falling portion 19B may be used. Here, the water tray 18
The B outer surface and the falling portion 19B outer surface are formed into an R-shaped curved surface. The heat insulating material 25 is stuck on this curved surface.

Therefore, since the heat exchange air flowing along the outer surface of the water receiving tray 18B does not stay such as a vortex, no dew condensation is observed. Moreover, since the heat insulating material is adhered along the flow surface of the heat exchange air, even if the water receiving tray 18B is cooled by receiving the drain water, it is insulated and no condensation occurs.

[0054]

According to the present invention as described above, according to the present invention, C
Of a heat exchanger and a sub-drain pan inclined in a U-shape
Direction distance is aligned in a straight line from the lower side to the upper side
Since spaced sequential-die, high humidity of the heat exchange air stagnates
The distance between the heat exchanger and the sub-drain pan can be increased on the upper side of the heat exchanger arranged in the shape of the letter "C", thereby preventing partial condensation of the sub-drain pan. On the lower side, the distance between the heat exchanger and the sub-drain pan can be reduced.
To maximize the suction area, and heat exchange
The efficiency can be improved.

Further, a sub-drain pan for the heat exchanger
The distance of the falling part of
Heat exchange at the falling part
The area of the stagnation area between the heat exchanger and the heat exchanger is reduced,
It is possible to suppress the partial cooling of the falling part due to the influence
In addition, the flow of heat exchange air is smooth, ensuring airflow and quiet
It is effective for the conversion.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of an air conditioner , showing an embodiment of the present invention.

FIG. 2 is a diagram illustrating an arrangement of a sub-drain pan with respect to a heat exchanger according to the embodiment.

FIG. 3 is a front view of the embodiment with a sub-drain pan partially omitted;

FIG. 4 is a configuration diagram of a sub-drain pan according to another embodiment.

FIG. 5 is a configuration diagram of a sub-drain pan according to still another embodiment.

FIG. 6 is a schematic longitudinal sectional view of a conventional air conditioner.

FIG. 7 shows the conventional sub-drain pan for a heat exchanger.
The figure explaining arrangement | positioning.

FIG. 8 shows the configuration of a conventional sub-drain pan and a heat exchanger.
FIG. 4 is a diagram illustrating an arrangement of a sub-drain pan falling section with respect to FIG.

FIG. 9 is a longitudinal sectional view of another conventional sub-drain pan.

[Explanation of symbols]

4 ... Suction port, 5a, 5b ... Blow-out port, 1 ... Air conditioner body (unit body), 11a, 11b ... Indoor heat exchanger, 12a, 12b ... Indoor blower, 21 ... Conduction space part, 14 ... Sub drain pan , 13 ... Main drain pan,
18: water tray, 19: falling part, 20: rising part.

Claims (1)

(57) [Claims] 1. A suction port is provided at the center of the lower surface , and both suction ports are provided.
An air conditioner body with the outlet on the side, in this air conditioner body, a pair of heat exchangers arranged in the form of a slanted roof in an inclined obliquely to face the suction port and, Each
A pair of heat exchangers and a pair of air outlets
An air blower is disposed on the projection surface below each of the heat exchangers in a C-shape facing the heat exchangers, receives drain water dripped from each of the heat exchangers, and conducts heat exchange air. a pair of sub <br/> Budorenpan formed in a stepped shape so as to have a Spoken space receives the drain water from the Sabudorenpan, in the air conditioner provided with the main drain pan to drain to the outside, the respective heat exchanger Distance of each sub-drain pan to the vessel
Are aligned in a straight line from bottom to top
The sub-drain pans are largely separated from each other, and each of the sub-drain pans is inclined at a predetermined angle with respect to a vertical line, and a plurality of water trays parallel to each other in a horizontal direction. And a rising portion integrally bent upward at an end of the water receiving tray opposite to the heat exchanger, and a rising portion for each of the heat exchangers is provided. The air conditioner is characterized in that the distance of the descending part is aligned with the straight line, and is gradually increased from the lower part toward the upper part which is the bent part of the water receiving tray.