JP2004183979A - Air conditioner indoor unit - Google Patents

Abstract

An indoor unit of an air conditioner provided with a main drain pan capable of smoothly discharging drain water generated by a heat exchanger.
An indoor unit main body, a heat exchanger disposed at an angle in the indoor unit main body, and a sub-drain pan disposed on a lower surface side of the heat exchanger and receiving drain water dripped from the heat exchanger. A main drain pan 14 disposed below the sub-drain pan and the heat exchanger, collecting drain water flowing down from the heat exchanger and drain water received by the sub-drain pan, and discharging the collected water to the outside; In an indoor unit of an air conditioner having a blower disposed opposite to an exchanger, a main drain pan is provided with a water receiving portion 20 for receiving drain water, and a discharge for collecting drain water in the water receiving portion and discharging the collected water to the outside. The water receiving portion is inclined about 2 degrees higher toward the blower side, and a groove-shaped flow path 23a is formed on the upper side in the direction of inclination to gradually widen toward the discharge portion.
[Selection diagram] FIG.

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an indoor unit of a ceiling-mounted air conditioner, and more particularly to a drain pan structure for collecting and discharging drain water generated in a heat exchanger.
[0002]
[Prior art]
An indoor unit of a ceiling-mounted type air conditioner has an indoor unit main body buried under the ceiling and a decorative panel for shielding an opening on a lower surface of the indoor unit main body, and only the decorative panel is exposed to the indoor side. It has become. The decorative panel has an outlet for blowing and guiding the heat exchange air and an inlet for sucking room air.
[0003]
In this type of air conditioner, it is necessary to keep the height of the indoor unit main body low due to the installation space behind the ceiling. Therefore, the heat exchanger disposed in the indoor unit main body is configured to be disposed inclined to the suction port side.
[0004]
For this reason, a sub-drain pan for receiving drain water that falls down from the heat exchanger is provided on the lower surface side of the heat exchanger. The sub-drain pan is arranged in parallel on the lower surface side of the heat exchanger, and a main drain pan for collecting drain water generated by the heat exchanger is provided at a lower end of the heat exchanger and the sub-drain pan. is set up. An air blower is provided at an upper position on the outlet side of the main drain pan so as to face the heat exchanger.
[0005]
Drain water generated in the heat exchanger by the cooling operation flows down the heat exchanger and flows directly to the main drain pan, or drops to a sub-drain pan provided on the lower surface side thereof, and drops to the main drain pan from the lower end of the sub-drain pan. I do. After being collected by the main drain pan, it is discharged from a discharge portion provided at one end thereof by a discharge means such as a drain pump (for example, see Patent Document 1).
[0006]
[Patent Document 1]
JP-A-9-26154.
[0007]
[Problems to be solved by the invention]
By the way, according to the indoor unit of the air conditioner described above, the portion on the outlet side of the main drain pan is directly opposed to the blower. Therefore, when the blower is operated, the portion on the outlet side of the main drain pan is likely to be under negative pressure, and the collected drain water is attracted to the outlet side, so that it becomes difficult to be sent to the discharge portion side and may stagnate. . In this case, the drain water is not discharged smoothly, which may cause mold on the bottom surface of the main drain pan due to poor drainage.
[0008]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an indoor unit of an air conditioner having a main drain pan capable of smoothly discharging drain water generated by a heat exchanger. Is to do.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problems and achieve the object, an indoor unit of an air conditioner according to the present invention includes an indoor unit main body, a heat exchanger that is inclined and disposed inside the indoor unit main body, A sub-drain pan that is disposed substantially in parallel with a predetermined distance on the lower surface side of the vessel and receives drain water dripped from the heat exchanger, and is disposed below the sub-drain pan and the heat exchanger, A main drain pan for collecting and discharging the drain water flowing down from the exchanger and the drain water received by the sub-drain pan to the outside, and a blower disposed opposite to the heat exchanger at a position above the main drain pan. In the indoor unit of an air conditioner having the above, the main drain pan comprises a water receiving portion for receiving drain water, and a discharging portion for collecting and discharging the drain water of the water receiving portion to the outside, Above water receiving section Is inclined to be higher toward the the ventilator side, in the inclined direction upper position wherein the flow path widened gradually removing is formed toward the the discharge side.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0011]
FIG. 1 is a perspective view showing a configuration of an indoor unit of an air conditioner according to an embodiment of the present invention, FIG. 2 is a perspective view showing a configuration of an indoor unit main body according to the embodiment, and FIG. Sectional drawing which shows the structure of the indoor unit of the air conditioner which concerns on embodiment, FIG. 4: is a bottom view which shows the structure of the indoor unit main body which concerns on the embodiment.
[0012]
The indoor unit of the air conditioner shown in FIG. 1 includes an indoor unit main body 10 and a decorative panel 100.
[0013]
As shown in FIG. 3, the indoor unit main body 10 has a housing 11 having a lower surface opening 11a. The housing 11 is installed behind the ceiling through an attachment opening 1 a provided in the ceiling plate 1. The lower surface opening 11 a of the housing 11 is shielded by a decorative panel 100 arranged on the room R side of the ceiling panel 1.
[0014]
The decorative panel 100 includes a suction port 101 on one side for sucking room air, and a blowout port 102 on the other side for blowing heat exchange air into the room R.
[0015]
In the indoor unit main body 10, a heat exchanger 12 is arranged to be inclined toward the suction port 101, and a sub-drain pan 13 is arranged in parallel at a predetermined distance on the lower surface side of the heat exchanger 12. ing.
[0016]
A long drain pan 14 is provided between the suction port 101 and the air outlet 102 in the longitudinal direction of the indoor unit main body 10. The lower ends of the heat exchanger 12 and the sub-drain pan 13 are installed in the main drain pan 14, and drain water generated by the cooling action of the heat exchanger 12 is collected.
[0017]
One end of the main drain pan 14 in the width direction (the left-right direction in FIG. 3) protrudes toward the air outlet 102, and the protruding end forms a nose portion 15. A blower 16 is disposed above the nose portion 15, and forms a blowout channel 17 between the blower 16 and the blower outlet 102.
[0018]
An electric precipitator 18 is disposed in the indoor unit main body 10 at a position facing the inlet 101 of the decorative panel 100.
[0019]
The electric dust collector 18 has one end fixed to a side surface of the housing 11 and the other end fixed to a dust collector support base 19 fixed to the main drain pan 14 and introduced from the suction port 101. Dust in indoor air is attracted by electrostatic action.
[0020]
The heat exchanger 12 is a finned tube heat exchanger in which a plurality of pipes are inserted through a large number of aluminum fins arranged side by side with a narrow gap, and constitutes a meandering refrigerant flow path as a whole. ing.
[0021]
Next, the configuration of the main drain pan 14 will be described in detail.
[0022]
5 is a perspective view showing the upper surface side of the main drain pan 14 according to the embodiment, FIG. 6 is a perspective view showing the lower surface side of the main drain pan 14 according to the embodiment, and FIG. FIG. 8 is an enlarged sectional view showing an essential part of FIG. 7.
[0023]
The main drain pan 14 shown in FIG. 5 has a structure in which the upper surface is formed of a waterproof resin material and the lower surface thereof is covered with a heat insulating foam material in order to prevent dew condensation on the back surface, and receives drain water flowing down from above. A water receiving portion 20 and a discharging portion 21 provided at one longitudinal end of the water receiving portion 20 for collecting, storing, and discharging the drain water collected by the water receiving portion 20 to the outside. Is done.
[0024]
The discharge unit 21 is formed in a container shape so that drain water guided from the water receiving unit 20 is stored therein, and a drain pump (not shown) for forced discharge is installed therein. The water is discharged from the water receiving section 20.
[0025]
As shown in FIGS. 5 and 7, a plurality of, in this embodiment, two convex ribs 22 a and 22 b are integrally formed in the water receiving portion 20 along the longitudinal direction. Next to these convex ribs 22a, 22b, a plurality of, in this embodiment, three drain channels 23a, 23b, 23c through which drain water flows are formed along the longitudinal direction.
[0026]
The channel 23b formed in the center is formed with a concave drain groove in the center along the longitudinal direction, and the channel 23c on the suction port 101 side is substantially the same as the depth of the concave drain groove of the channel 23b. Is formed so that water can easily flow toward the discharge portion 21 side.
[0027]
In addition, the flow path 23b formed in the center and the flow path 23a on the side of the outlet 102 are inclined at a predetermined angle, that is, about 2 degrees in the present embodiment so that the inner surface becomes higher toward the side of the outlet 102. . That is, the collected drain water is concentrated and collected on the suction port 101 side of the main drain pan 14, so that the flow of the drain water from the water receiving section 20 to the discharge section 21 side is smooth, and the drain pump of the discharge section 21 is formed. This ensures smooth discharge when the is activated.
[0028]
As shown in FIG. 8, the convex rib 22a on the side of the outlet 102 of the water receiving portion 20 gradually narrows in width toward the discharge portion 21, and has an intersection 30 with the flow path 23a. Has a circular arc shape such that the radius of curvature R increases toward the discharge portion 21 side.
[0029]
That is, the flow path 23a formed on the outlet 102 side of the convex rib 22a gradually widens toward the discharge section 21 side. Therefore, when the drain water is dripped almost uniformly in the longitudinal direction of the main drain pan 14, the water level of the drain water in the flow path 23a decreases toward the discharge unit 21 side.
[0030]
As a result, the drain water collected in the flow path 23a flows toward the discharge unit 21 due to the pressure difference due to the difference in the water level.
[0031]
As shown in FIG. 6, a plurality of, in this embodiment, two screw bosses 24, 24 (attachment portions) are provided on the lower surface of the main drain pan 14. These screw bosses 24 and 24 are integrally formed of a resin material forming the main drain pan water receiving portion 20, and the tips thereof are exposed on the lower surface of the main drain pan 14.
[0032]
Then, as described above, the dust collector support base 19 for attaching the electric dust collector 18 is fixed to these two screw bosses 24, 24 by the screws 25 as shown in FIG.
[0033]
Further, as shown in FIG. 5, concave portions 15a are formed at both ends of the nose portion 15 of the main drain pan 14, respectively.
[0034]
In the indoor unit of the air conditioner configured as described above, the drain water generated in the heat exchanger 12 by the cooling operation flows down the fins of the heat exchanger 12 and directly flows to the main drain pan 14 or is provided on the lower surface side thereof. The liquid is dropped on the sub-drain pan 13, and dropped from the lower end of the sub-drain pan 13 onto the main drain pan 14. After being collected by the main drain pan 14, it is discharged by a drain pump.
[0035]
According to the indoor unit of the air conditioner configured as described above, the flow paths 23a and 23b of the water receiving portion 20 of the main drain pan 14 are inclined at about 2 degrees so as to become higher toward the outlet 102 side.
[0036]
Therefore, the collected drain water can be concentrated and stored in the flow paths 23b and 23c on the suction port 101 side of the main drain pan 14, so that when the drain pump is operated, the drain water in the water receiving portion 20 is removed. It can be discharged smoothly.
[0037]
In the water receiving section 20 of the main drain pan 14, the flow path 23a on the side of the outlet 101 is formed so as to widen toward the discharge section 21 side.
[0038]
Therefore, the water level of the drain water in the flow path 23a can be reduced toward the discharge unit 21 side, so that the drain water can be discharged to the discharge unit 21 side by a pressure difference due to the difference in the water level. As a result, it is possible to prevent the drain water from stagnating in the flow path 23a, thereby suppressing the occurrence of mold.
[0039]
In addition, concave portions 15 a are formed at both ends of the nose portion 15 of the main drain pan 14.
[0040]
Therefore, since the airflow resistance at both ends of the nose portion 15 is reduced, a decrease in the air volume at both ends of the outlet 102 is suppressed, and the turbulence of the airflow easily generated at both ends of the outlet 102 can be prevented.
[0041]
Further, a screw boss 24 for a dust collector support base 19 for mounting the electric dust collector 18 is formed integrally with the resin material forming the water receiving portion 20 on the lower surface of the main drain pan 14.
[0042]
Therefore, when the main drain pan 14 is manufactured, a step of embedding a sheet metal or the like in a heat insulating foam material covering the back surface to fix the dust collector support base 19 is not required, so that the manufacturing process can be simplified.
[0043]
【The invention's effect】
According to the present invention, drain water generated by the heat exchanger can be smoothly discharged.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of an indoor unit of an air conditioner according to one embodiment of the present invention.
FIG. 2 is an exemplary perspective view showing a configuration of an indoor unit main body according to the embodiment;
FIG. 3 is an exemplary sectional view showing the configuration of the indoor unit of the air conditioner according to the embodiment;
FIG. 4 is a bottom view showing the configuration of the indoor unit main body according to the embodiment.
FIG. 5 is a perspective view showing the upper surface side of the main drain pan according to the embodiment.
FIG. 6 is a perspective view showing the lower surface side of the main drain pan according to the embodiment.
FIG. 7 is an enlarged sectional view showing a main drain pan portion of FIG. 3;
FIG. 8 is an enlarged sectional view showing a main part of FIG. 7;
[Explanation of symbols]
10. Indoor unit body,
12 ... heat exchanger,
13 ... Sub drain pan,
14 ... Main drain pan,
16 ... Blower,
20 ... Water receiving part,
21 ... discharge section,
22a, 22b ... convex rib,
23a, 23b, 23c ... flow paths.

Claims (2)

The indoor unit itself,
A heat exchanger arranged obliquely inside the indoor unit body,
A sub-drain pan that is disposed substantially in parallel with a predetermined distance on the lower surface side of the heat exchanger and receives drain water dripped from the heat exchanger;
A main drain pan disposed below the sub-drain pan and the heat exchanger, collecting drain water flowing down from the heat exchanger and drain water received by the sub-drain pan, and discharging the collected drain water to the outside;
In an indoor unit of an air conditioner having a blower disposed opposite to the heat exchanger at a position above the main drain pan,
The main drain pan has a water receiving portion for receiving drain water,
A drain for collecting and discharging the drain water from the water receiver to the outside,
The water receiving portion is inclined so as to become higher toward the blower side, and a flow path that gradually widens toward the discharge portion side is formed at an upper position in the inclination direction. Air conditioner indoor unit. The indoor unit for an air conditioner according to claim 1, wherein the flow path is formed by providing a convex rib having a width reduced toward the discharge section side in the water receiving section.

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