JPH11351604A - Drain structure of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain structure of air conditioner which can prevent the accumulation of dust and the generation of a slime as caused by the accumulated dust on a drain pan or a heat exchanger as much as possible. SOLUTION: A drain pump 8 is provided at a proper point of a drain pan 10 arranged below a heat exchanger 6 and drain water generated in the heat exchanger 6 is discharged outside the machine by the drain pump 8. In a such a type, it is so arranged that the drain water discharged by the drain pump 8 can be recirculated to a part on the upstream side of the drain pan 10. With such an arrangement, when the drain water recirculated to the upstream side of the drain pan 10 flows on the drain pan 10 at a flow velocity toward the downstream from the upstream side, the dust stuck on the drain pan 10 is washed away by the drain water to inhibit the generation of mildew or malodor or the generation of a slime as caused by the accumulated dust.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage structure for an air conditioner.

[0002]

2. Description of the Related Art In an air conditioner, drain water generated by dew condensation in a heat exchanger is received by a drain pan disposed below the heat exchanger and discharged to the outside of the machine. As a method of discharging the drain water to the outside of the machine, for example, a method using natural drainage by gravity as seen in a wall-mounted air conditioner and a drain pump as used in, for example, a ceiling embedded type air conditioner are used. A method using forced drainage is known.

[0003]

However, since the drain pan is disposed below the heat exchanger, the upper surface thereof is open. Therefore, during long-term use of the air conditioner, Gradually, dust in the air will adhere to the drain pan.

However, the drain water dripped from the heat exchanger side to the drain pan side is generated gradually as the operation of the air conditioner is continued, and is not generated in a large amount at a stroke. Drain water dropped on the drain pan side moves along the bottom surface of the drain pan and is collected at a predetermined discharge position (that is, a position of a drain port for natural drainage or a position of a drain pump for forced drainage). In some cases, the flow rate is very small.

For this reason, the dust adhering to the drain pan is not washed out by the drain water, but is deposited on the drain pan as it is, and the deposited dust forms mold and slimes, thereby causing odor. was there.

[0006] In the heat exchanger, the water droplets condensed on the fins flow down along the fins, but the flow rate is extremely small and the flow speed is low. It is difficult to wash away the attached dust, and as a result, the same problem as in the above-described drain pan may occur in the fin portion of the heat exchanger.

Accordingly, the present invention minimizes the accumulation of dust in a drain pan or a heat exchanger and the generation of slime due to the accumulated dust in an air conditioner in which drain water is forcibly drained by a drain pump. It is done for the purpose of.

[0008]

Means for Solving the Problems In the present invention, the following configuration is adopted as specific means for solving such problems.

In the drainage structure for an air conditioner according to the first aspect of the present invention, a drain pump 8 is provided at a proper position of a drain pan 10 disposed below the heat exchanger 6, and the drain water generated in the heat exchanger 6 is provided. Is drained out of the machine by the drain pump 8, wherein a part of the drain water discharged by the drain pump 8 can be returned to an upstream portion of the drain pan 10. .

In the drainage structure for an air conditioner according to the second aspect of the present invention, a drain pump 8 is provided at a proper position of a drain pan 10 disposed below the heat exchanger 6, and drain water generated in the heat exchanger 6 is provided. Is discharged outside the apparatus by the drain pump 8, wherein a part of the drain water discharged by the drain pump 8 can be sprayed to the heat exchanger 6 side.

In the drainage structure of the air conditioner according to the third aspect of the present invention, the slime is added to the drain water refluxed to the upstream portion of the drain pan 10 or the drain water sprayed to the heat exchanger 6 side. It is characterized by mixing a drug that suppresses the generation.

[0012]

According to the present invention, the following effects can be obtained by adopting such a configuration.

(A) According to the drainage structure for an air conditioner according to the first invention of the present application, a drain pump 8 is provided at an appropriate position of a drain pan 10 disposed below the heat exchanger 6, The drain water generated in the above is discharged outside the machine by the drain pump 8, and the drain water discharged by the drain pump 8 can be returned to the upstream portion of the drain pan 10.
The drain water refluxed to the upstream side of the drain pan 10 by the drain pump 8 flows through the drain pan 10 from the upstream side to the downstream side, and the dust adhering to the drain pan 10 by the drain water having this flow velocity. Is washed out, and dust accumulation on the drain pan 10 is prevented as much as possible. As a result, mold and odor caused by the accumulated dust or slime which affects the drainage capacity of the drain pump 8 is reduced. The occurrence is suppressed.

(B) According to the drainage structure for an air conditioner according to the second aspect of the present invention, a drain pump 8 is provided at an appropriate position of a drain pan 10 disposed below the heat exchanger 6, The drain water generated in the above is discharged outside the machine by the drain pump 8, and the drain water discharged by the drain pump 8 is discharged to the heat exchanger 6.
When the drain water sprayed to the heat exchanger 6 side by the drain pump 8 flows down along the fin surface of the heat exchanger 6, the drain water causes The dust adhering to the surface is washed away, and the drain water further flows down from the heat exchanger 6 to the drain pan 10 side and flows down the drain pan 10 from the upstream side to the downstream side to adhere to the drain pan 10. Dust is washed away. As a result, accumulation of dust on the fins of the heat exchanger 6 and the drain pan 10 is prevented as much as possible, and thus, in both the heat exchanger 6 and the drain pan 10, mold caused by the accumulated dust is generated. This suppresses generation of odor or odor or generation of slime which affects the drainage capacity of the drain pump 8.

(C) According to the drainage structure for an air conditioner according to the third aspect of the present invention, drain water refluxed to the upstream side of the drain pan 10 or drain sprayed to the heat exchanger 6 side Since water is mixed with a chemical that suppresses the generation of slime, the effect of suppressing the accumulation of dust in the drain pan 10 or the heat exchanger 6 due to the drain water washing action and the effect of suppressing the generation of slime by the chemical are described. The effects described in the above (a) or (b) are further enhanced by the synergistic action.

Further, in this case, since the chemical is mixed into the drain water which is refluxed to the upstream side of the drain pan 10 or sprayed to the heat exchanger 6, the drain pan is mixed with the chemical. The maintenance management work is easier than the case where the desorption operation of the drain pan 10 is required at the time of injection of the medicine, for example, when the medicine is directly injected onto the drain pan 10 without the necessity of detachment of the drain 10. There is also an effect.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drainage structure of an air conditioner according to the present invention will be specifically described below based on a preferred embodiment.

FIGS. 1 and 2 show an air conditioner Z embedded in a ceiling. The air conditioner Z includes a rectangular box-shaped casing 1 having an open lower surface and embedded in the back of the ceiling, a suction port 3 and an air outlet 4, and is mounted on the open end of the casing 1 from the indoor side. A fan 7 and a heat exchanger 6 are accommodated in an in-machine space 5 surrounded by the panel 2.

The heat exchanger 6 includes a plurality of fins 13,
Are sequentially arranged at predetermined intervals, and a large number of heat transfer tubes (not shown) are arranged by penetrating these many fins 13, 13,. In this embodiment, this is a fin type heat exchanger, which is bent into a substantially rectangular tube shape, and one end 6a and the other end 6b thereof are opposed to each other at a predetermined interval. The heat exchanger 6 having a substantially rectangular tube shape is disposed radially outward so as to surround the fan 7. Further, a drain pan 10 described below is arranged below the heat exchanger 6.

As shown in FIGS. 1 and 2, the drain pan 10 has a substantially square annular planar shape so as to cover the entire bottom surface of the heat exchanger 6.
At a position corresponding to the bottom of the heat exchanger 6, a drain groove 11 extending along the bent shape of the heat exchanger 6 is provided.
In the drain pan 10, a recess 12 is formed in the middle of the drain groove 11 in the groove direction, and the height of the bottom surface of the drain groove 11 is set to a predetermined value to secure a required flow gradient. The drain pan 10 is formed so as to be gradually lower from one end 10a and the other end 10b toward the reservoir 12.

A drain pump 8 for forcibly discharging drain water collected here is disposed in the reservoir 12 of the drain pan 10. This drain pump 8
Is connected to an outlet pipe 16 fixed to the casing 1 via a drain pipe 15, and the drain water accumulated in the reservoir 12 is discharged from the drain pipe 15 to the outside of the machine through the outlet pipe 16. The drain pump 8 is provided with a float switch 9. The drain pump 8 is started when the amount of drain water stored in the reservoir 12 becomes a predetermined value or more and the float switch 9 is turned on. .

Further, in this embodiment,
By applying the present invention, one end 17a of the circulation pipe 17 is connected to the middle of the drain pipe 15, and the other end 17b of the circulation pipe 17 is connected to the one end 10 of the drain pan 10.
a. Further, a cleaning agent filter 18 containing a medicine for preventing the generation of slime is interposed in the middle of the passage of the circulation pipe 17.
When a part of the drain water is refluxed from the drain pump 8 through, an appropriate amount of the chemical is mixed into the drain water.

In the air conditioner Z having the drainage structure configured as described above, the following operation and effect can be obtained when drainage water is drained.

That is, the drain water generated from the heat exchanger 6 during the operation of the air conditioner Z is supplied to the drain pan 10
When a predetermined amount or more is stored in the reservoir 12, the drain pump 8 is started in response to a signal from the float switch 9, and the drain water accumulated in the reservoir 12 is sequentially discharged to the outside through the drain pipe 15. Is discharged. At this time, part of the drain water discharged from the drain pump 8 to the drain pipe 15 side is diverted from the drain pipe 15 to the circulation pipe 17 side,
From the other end 17b to the other end 10 of the drain pan 10
Refluxed to b side.

Since the amount of the drain water recirculated to the other end 10b of the drain pan 10 is large, it flows down the drain groove 11 of the drain pan 10 to the reservoir 12 at a required flow rate. The dust adhering in the drain groove 11 is washed away by the flow of the reflux drain water, moves to the reservoir 12 side together with the drain water, and is discharged from the reservoir 12 to the outside by the drain pump 8. . The drainage groove 11 of the drain pan 10 is washed away by the reflux drain water, thereby generating mold and odor due to dust attached to the drainage groove 11 and affecting the drainage capacity of the drain pump 8. The generation of slime is suppressed as much as possible.

Further, in this case, since the chemical is mixed into the reflux drain water, the effect of suppressing the accumulation of dust in the drain pan 10 by the flushing action of the drain water is further remarkable. Further, the cleaning agent filter 18 is provided in the middle of the circulation pipe 17,
Since the chemical is mixed with the drain water refluxed through the circulation pipe 17, a working opening (not shown) is provided by, for example, providing a peripheral wall of the casing 1 at a position corresponding to the cleaning agent filter 18. It is possible to replenish the cleaning agent filter 18 and the like through the work opening without attaching and detaching the drain pan 10, and improvement of the workability can be expected.

By the way, in the above embodiment, by applying the invention of claim 1, the circulating pipe 17 is branched from the middle of the drain pipe 15, and the drain water is passed through the circulating pipe 17. Part of the other end 10 of the drain pan 10
Although reflux is performed to the b side, in another embodiment, the invention according to claim 2 may be applied to spray a part of the drain water to the heat exchanger 6. Things.

That is, as shown by a chain line in FIG. 1, together with the circulating pipe 17 or instead of the circulating pipe 17,
A branch pipe 20 is connected in the middle of the drain pipe 15, and the branch pipe 20 is connected to a scatter pipe 21 extending along the upper surface of the heat exchanger 6. The spraying tube 21 sprays drain water as evenly as possible on the upper part of the heat exchanger 6, and therefore, for example, has a number of small holes (not shown) formed in the tube wall. Etc. are used.
In the middle of the branch pipe 20, the cleaning agent filter 1 is provided.
8 are interposed.

With this configuration, when drain water is discharged to the drain pipe 15 side by the drain pump 8, a part of the drain water is diverted from the drain pipe 15 to the branch pipe 20 side, and the spray pipe 21 From the upper surface side of the heat exchanger 6.

The drain water sprayed on the upper surface of the heat exchanger 6 flows down along the surfaces of the fins 13, 13,... Of the heat exchanger 6 and drops on the drain pan 10 side.
At this time, the dust adhering to the surfaces of the fins 13, 13,... Is washed away by the drain water flowing down along the surfaces of the fins 13, 13,. Further, the drain water dropped from the heat exchanger 6 side to the drain pan 10 side moves the drain groove 11 of the drain pan 10 to its higher side (that is, one end 10a of the drain pan 10).
And the other end 10b) flows toward the lower side (that is, the reservoir 12 side of the drain pan 10), and at this time, the dust adhering to the drain pan 10 is washed away by the drain water.

As a result, the accumulation of dust on the fins of the heat exchanger 6 and the drain pan 10 is prevented as much as possible, and thus, the accumulated dust is reduced on both the heat exchanger 6 and the drain pan 10. This suppresses generation of mold or odor as a cause, or generation of slime which affects the drainage capacity of the drain pump 8. In addition, in this case, the above-mentioned effects are of course more remarkable by mixing the above-mentioned chemicals into the sprayed drain water.

[Brief description of the drawings]

FIG. 1 is a plan view (partial cross section) of an air conditioner having a drainage structure according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

[Explanation of symbols]

1 is a casing, 2 is a panel, 3 is a suction port, 4 is an outlet, 5 is a space inside the machine, 6 is a heat exchanger, 7 is a fan, 8 is a drain pump, 9 is a float switch, 10 is a drain pan, and 11 is drainage. A groove, 12 is a reservoir, 13 is a fin, 15 is a drain pipe, 16 is an outlet pipe, 17 is a circulation pipe, 18 is a cleaning agent filter, 20 is a branch pipe, 21 is a spray pipe, and Z is an air conditioner.

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[Procedure amendment]

[Submission date] September 29, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Drainage structure of air conditioner

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage structure for an air conditioner.

[0002]

2. Description of the Related Art In an air conditioner, drain water generated by dew condensation in a heat exchanger is received by a drain pan disposed below the heat exchanger and discharged to the outside of the machine. As a method of discharging the drain water to the outside of the machine, for example, a method using natural drainage by gravity as seen in a wall-mounted air conditioner and a drain pump as used in, for example, a ceiling embedded type air conditioner are used. A method using forced drainage is known.

[0003]

However, since the drain pan is disposed below the heat exchanger, the upper surface thereof is open. Therefore, during long-term use of the air conditioner, Gradually, dust in the air will adhere to the drain pan.

However, the drain water dripped from the heat exchanger side to the drain pan side is generated gradually as the operation of the air conditioner is continued, and is not generated in a large amount at a stroke. Drain water dropped on the drain pan side moves along the bottom surface of the drain pan and is collected at a predetermined discharge position (that is, a position of a drain port for natural drainage or a position of a drain pump for forced drainage). In some cases, the flow rate is very small.

For this reason, the dust adhering to the drain pan is not washed out by the drain water, but is deposited on the drain pan as it is, and the deposited dust forms mold and slimes, thereby causing odor. was there.

[0006] In the heat exchanger, the water droplets condensed on the fins flow down along the fins, but the flow rate is extremely small and the flow speed is low. It is difficult to wash away the attached dust, and as a result, the same problem as in the above-described drain pan may occur in the fin portion of the heat exchanger.

Accordingly, the present invention minimizes the accumulation of dust in a drain pan or a heat exchanger and the generation of slime due to the accumulated dust in an air conditioner in which drain water is forcibly drained by a drain pump. It is done for the purpose of.

[0008]

Means for Solving the Problems In the present invention, the following configuration is adopted as specific means for solving such problems.

In the drainage structure for an air conditioner according to the first aspect of the present invention, a drain pump 8 is provided at a proper position of a drain pan 10 disposed below the heat exchanger 6, and the drain water generated in the heat exchanger 6 is provided. Is drained out of the machine by the drain pump 8, wherein a part of the drain water discharged by the drain pump 8 can be returned to the high-side portion of the drain pan 10. .

The drainage structure for an air conditioner according to the second invention of the present application is characterized in that a chemical for suppressing the generation of slime is mixed in the drain water refluxed to the higher part of the drain pan 10.

[0011]

According to the present invention, the following effects can be obtained by adopting such a configuration.

(A) According to the drainage structure for an air conditioner according to the first invention of the present application, a drain pump 8 is provided at an appropriate position of a drain pan 10 disposed below the heat exchanger 6, The drain water generated in the above is drained out of the machine by the drain pump 8, and the drain water discharged by the drain pump 8 can be returned to the high-order portion of the drain pan 10.
The drain water refluxed to the higher side of the drain pan 10 by the drain pump 8 flows through the drain pan 10 from the higher side to the lower side, and the dust adhering to the drain pan 10 by the drain water having this flow velocity. Is washed out, and dust accumulation on the drain pan 10 is prevented as much as possible. As a result, mold and odor caused by the accumulated dust or slime which affects the drainage capacity of the drain pump 8 is reduced. The occurrence is suppressed.

(B) According to the drainage structure for an air conditioner according to the second aspect of the present invention, a chemical that suppresses the generation of slime is mixed into the drain water that is returned to the higher portion of the drain pan 10. Therefore, the effect described in the above (a) is further enhanced by the synergistic effect of the effect of suppressing the accumulation of dust in the drain pan 10 or the heat exchanger 6 due to the action of washing out the drain water and the effect of suppressing the generation of slime by the chemical. It can be enhanced.

Further, in this case, since the chemical is mixed into the drain water refluxed to the higher side of the drain pan 10, the mixing of the chemical does not require the desorption of the drain pan 10; There is also an effect that the maintenance management work is facilitated as compared with the case where the desorption operation of the drain pan 10 is required at the time of introducing the medicine, such as when the medicine is directly injected onto the drain pan 10.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drainage structure of an air conditioner according to the present invention will be specifically described below based on a preferred embodiment.

FIG. 1 and FIG. 2 show an air conditioner Z of a recessed ceiling type. The air conditioner Z includes a rectangular box-shaped casing 1 having an open lower surface and embedded in the back of the ceiling, a suction port 3 and an air outlet 4, and is mounted on the open end of the casing 1 from the indoor side. A fan 7 and a heat exchanger 6 are accommodated in an in-machine space 5 surrounded by the panel 2.

The heat exchanger 6 has a large number of fins 13,
Are sequentially arranged at predetermined intervals, and a large number of heat transfer tubes (not shown) are arranged by penetrating these many fins 13, 13,. In this embodiment, this is a fin type heat exchanger, which is bent into a substantially rectangular tube shape, and one end 6a and the other end 6b thereof are opposed to each other at a predetermined interval. The heat exchanger 6 having a substantially rectangular tube shape is disposed radially outward so as to surround the fan 7. Further, a drain pan 10 described below is arranged below the heat exchanger 6.

As shown in FIGS. 1 and 2, the drain pan 10 has a substantially rectangular annular planar shape so as to cover the entire bottom surface of the heat exchanger 6.
At a position corresponding to the bottom of the heat exchanger 6, a drain groove 11 extending along the bent shape of the heat exchanger 6 is provided.
In the drain pan 10, a recess 12 is formed in the middle of the drain groove 11 in the groove direction, and the height of the bottom surface of the drain groove 11 is set to a predetermined value to secure a required flow gradient. The drain pan 10 is formed so as to be gradually lower from one end 10a and the other end 10b toward the reservoir 12.

A drain pump 8 for forcibly discharging drain water collected here is disposed in the reservoir 12 of the drain pan 10. This drain pump 8
Is connected to an outlet pipe 16 fixed to the casing 1 via a drain pipe 15, and the drain water accumulated in the reservoir 12 is discharged from the drain pipe 15 to the outside of the machine through the outlet pipe 16. The drain pump 8 is provided with a float switch 9. The drain pump 8 is started when the amount of drain water stored in the reservoir 12 becomes a predetermined value or more and the float switch 9 is turned on. .

Further, in this embodiment,
By applying the present invention, one end 17a of the circulation pipe 17 is connected to the middle of the drain pipe 15, and the other end 17b of the circulation pipe 17 is connected to the one end 10 of the drain pan 10.
a. Further, a cleaning agent filter 18 containing a medicine for preventing the generation of slime is interposed in the middle of the passage of the circulation pipe 17.
When a part of the drain water is refluxed from the drain pump 8 through, an appropriate amount of the chemical is mixed into the drain water.

In the air conditioner Z having the drainage structure configured as described above, the following operation and effect can be obtained at the time of drainage drainage.

That is, the drain water generated from the heat exchanger 6 during the operation of the air conditioner Z is supplied to the drain pan 10
When a predetermined amount or more is stored in the reservoir 12, the drain pump 8 is started in response to a signal from the float switch 9, and the drain water accumulated in the reservoir 12 is sequentially discharged to the outside through the drain pipe 15. Is discharged. At this time, part of the drain water discharged from the drain pump 8 to the drain pipe 15 side is diverted from the drain pipe 15 to the circulation pipe 17 side,
From the other end 17b to the other end 10 of the drain pan 10
Refluxed to b side.

Since the amount of the drain water returned to the other end 10b of the drain pan 10 is large, the drain water flows in the drain groove 11 of the drain pan 10 to the reservoir 12 at a required flow rate. The dust adhering in the drain groove 11 is washed away by the flow of the reflux drain water, moves to the reservoir 12 side together with the drain water, and is discharged from the reservoir 12 to the outside by the drain pump 8. . The drainage groove 11 of the drain pan 10 is washed away by the reflux drain water, thereby generating mold and odor due to dust attached to the drainage groove 11 and affecting the drainage capacity of the drain pump 8. The generation of slime is suppressed as much as possible.

Further, in this case, since the chemical is mixed into the reflux drain water, the effect of suppressing the accumulation of dust in the drain pan 10 by the washing action of the drain water becomes more remarkable. Further, the cleaning agent filter 18 is provided in the middle of the circulation pipe 17,
Since the chemical is mixed with the drain water refluxed through the circulation pipe 17, a working opening (not shown) is provided by, for example, providing a peripheral wall of the casing 1 at a position corresponding to the cleaning agent filter 18. It is possible to replenish the cleaning agent filter 18 and the like through the work opening without attaching and detaching the drain pan 10, and improvement of the workability can be expected.

In the above embodiment, the circulation pipe 17 is branched from the drain pipe 15 in the middle of the pipe.
A part of the drain water is recirculated to the other end 10b of the drain pan 10 through the circulation pipe 17, but in other embodiments, a part of the drain water is sprayed to the heat exchanger 6. It can also be configured to perform

That is, as shown by a chain line in FIG. 1, together with the circulating pipe 17 or instead of the circulating pipe 17,
A branch pipe 20 is connected in the middle of the drain pipe 15, and the branch pipe 20 is connected to a scatter pipe 21 extending along the upper surface of the heat exchanger 6. The spraying tube 21 sprays drain water as evenly as possible on the upper part of the heat exchanger 6, and therefore, for example, has a number of small holes (not shown) formed in the tube wall. Etc. are used.
In the middle of the branch pipe 20, the cleaning agent filter 1 is provided.
8 are interposed.

With this configuration, when drain water is discharged to the drain pipe 15 side by the drain pump 8, a part of the drain water is diverted from the drain pipe 15 to the branch pipe 20 side, and the spray pipe 21 From the upper surface side of the heat exchanger 6.

The drain water sprayed on the upper surface side of the heat exchanger 6 flows down along the surfaces of the fins 13, 13,... Of the heat exchanger 6 and drops on the drain pan 10 side.
At this time, the dust adhering to the surfaces of the fins 13, 13,... Is washed away by the drain water flowing down along the surfaces of the fins 13, 13,. Further, the drain water dropped from the heat exchanger 6 side to the drain pan 10 side moves the drain groove 11 of the drain pan 10 to its higher side (that is, one end 10a of the drain pan 10).
And the other end 10b) flows toward the lower side (that is, the reservoir 12 side of the drain pan 10), and at this time, the dust adhering to the drain pan 10 is washed away by the drain water.

As a result, the accumulation of dust on the fins of the heat exchanger 6 and the drain pan 10 is prevented as much as possible, so that the accumulated dust is removed by both the heat exchanger 6 and the drain pan 10. This suppresses generation of mold or odor as a cause, or generation of slime which affects the drainage capacity of the drain pump 8. In addition, in this case, the above-mentioned effects are of course more remarkable by mixing the above-mentioned chemicals into the sprayed drain water.

[Brief description of the drawings]

FIG. 1 is a plan view (partial cross section) of an air conditioner having a drainage structure according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

[Description of Signs] 1 is a casing, 2 is a panel, 3 is a suction port, 4 is an air outlet, 5 is an in-machine space, 6 is a heat exchanger, 7 is a fan, 8 is a drain pump, 9 is a float switch, 10 is Drain pan, 11 is a drain groove, 12 is a reservoir, 13 is a fin, 15 is a drain pipe, 16 is an outlet pipe, 17 is a circulation pipe, 18 is a detergent filter, 20 is a branch pipe, 21 is a spray pipe, and Z is air. It is a harmonic machine.

Claims (3)

[Claims] A drain pump (8) is provided at an appropriate position of a drain pan (10) disposed below a heat exchanger (6), and drain water generated in the heat exchanger (6) is supplied to the drain pump (8). ), Wherein a part of the drain water discharged by the drain pump (8) can be returned to an upstream portion of the drain pan (10). The drainage structure of the air conditioner. 2. A drain pump (8) is provided at an appropriate position of a drain pan (10) disposed below the heat exchanger (6), and drain water generated in the heat exchanger (6) is supplied to the drain pump (8). ), Wherein a part of the drain water discharged by the drain pump (8) can be sprayed to the heat exchanger (6) side. Air conditioner drainage structure. 3. The method according to claim 1, wherein the generation of slime is suppressed in drain water refluxed to an upstream portion of the drain pan or drain water sprayed to the heat exchanger. A drainage structure for an air conditioner, characterized by mixing a chemical to be removed.