JPH11132494A - Drain water draining apparatus for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain water draining apparatus for an air conditioner without generating an abnormal sound by changing no discharge amount even in the case of lowering a water level of the water by accompanying with drainage of the water and efficiently draining it. SOLUTION: A float 4 sinking or floating by following to a change in a water level of drain water 2 is arranged in a drain pan 1 provided in the air conditioner. And, a pumping port 9 of a drain pump 3 is mounted at the float 4 so that a distance between a position of the port 9 and a water level of the water 2 is maintained constantly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain water drainage device for an air conditioner, and more particularly, to a drain water drain device provided in an indoor unit of an air conditioner, the drain water level being reduced with drain water drainage. The present invention relates to a drain water drain device for an air conditioner that can efficiently discharge water without changing a discharge amount and does not generate abnormal noise.

[0002]

2. Description of the Related Art Conventionally, an indoor unit of an air conditioner is provided with a heat exchanger and a drain pan for receiving drain water condensed on the surface of a radiating fin constituting the heat exchanger. The stored drain water is
Generally, since the water can be directly drained from the drain pan to the outside, the water is drained to the outside by a natural fall method using a height difference.

[0003] However, depending on conditions such as an installation location, for example, in the case of an indoor unit or the like embedded in a ceiling surface, it may not be possible to directly drain drain water to the outside.
In such a case, a drain water draining device such as a drain pump for forcibly draining the drain water stored in the drain pan is provided.

As shown in FIG. 2, a drain water draining device for this air conditioner is provided with a drain pump 3 for sucking and draining drain water 2 stored in a drain pan 1. ing. In the drain pump 3, a motor 7 is provided on a bracket 16 attached to the drain pan 1, and a pump body 8 having a water pumping port 9 is connected to a lower end of a drive shaft 6 of the motor 7. A blade 11 connected to the drive shaft 6 is provided in the pump body 8, and the blade 11 is driven to rotate in the casing 10 of the pump body 8,
The drain water 2 is sucked into the pump body 8, and the sucked drain water 2 is drained to the outside from the discharge port 12 through the drain hose 13. Further, the drain pan 1 is provided with a float switch 14 for detecting the level of the stored drain water 2.
Is configured to operate the drain pump 3 on the basis of the detected value.

[0005]

By the way, in the drain device of the conventional air conditioner, since the pump body 8 is fixed via the bracket 16 attached to the drain pan 1, it is formed on the pump body 8. Pumping port 9
Is not kept constant, and when the drain pump 3 is operated based on the detection value of the float switch 14, the drain water is drained along with the drain water. 2 has a characteristic that the discharge amount also decreases as the water level decreases, and therefore, there is a problem that the drainage efficiency decreases as the operation time elapses.

When the water level of the drain water 2 drops and the distance between the pumping port 9 formed in the pump body 8 and the water surface of the drain water 2 in the drain pan 1 becomes close, the rotating blade 11 is moved. There was a problem that abnormal noise was generated by hitting the water surface or sucking air.

The present invention solves the problem of the drain water drainage device in the above-mentioned conventional air conditioner, and the discharge amount does not change even if the level of the drain water decreases with drainage of the drain water. An object of the present invention is to provide a drain water drain device for an air conditioner that can efficiently drain water and does not generate abnormal noise.

[0008]

In order to achieve the above object, a drain water draining device in an air conditioner according to the present invention is provided in a drain pan provided in the air conditioner, following a change in the level of the drain water. A float that floats and sinks is provided, and the float is provided with a pumping port of a drain pump so that the distance between the position of the pumping port and the surface of the drain water in the drain pan is kept constant. Features.

The drain water draining device in this air conditioner is provided with a float that floats and sinks following a change in the level of the drain water in a drain pan.
Attaching the drain pump outlet keeps the distance between the outlet and the drain water level in the drain pan constant, and prevents the drain pump blade from hitting the water surface or sucking air. can do.

In this case, the float can be supported so as to be able to move up and down by a guide installed in the drain pan.

Thus, the float can be smoothly and accurately raised and lowered by following the level of the drain water.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a drain water drainage device for an air conditioner according to the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of a drain water draining device in an air conditioner of the present invention. This drain water drain device is for draining drain water dropped from a heat exchanger provided in an indoor unit of an air conditioner, and receives and temporarily stores drain water 2 dropped from the heat exchanger. A drain pan 1 having the required capacity as described above is provided, and a float 4 and a float switch 14 are arranged in the drain pan 1.

The float 4 can be raised and lowered by a guide 5 fixed along the inner surface of the drain pan 1 so that the float 4 can smoothly and accurately rise and lower according to the fluctuation of the water level of the drain water 2 in the drain pan 1. Be supportive. The float switch 14 is attached along the inner surface of the drain pan 1 so that the level of the drain water 2 in the drain pan 1 can be detected.

The float 4 has a drain pump 3
Is placed, and in this state, the buoyancy is set up so that the buoyancy can be raised by the drain water 2 stored in the drain pan 1.

The drain pump 3 has a blade 1 inside.
The casing 10 of the pump body 8 provided with
And the blade 11 is driven to rotate by the motor 7 via the drive shaft 6 to draw up the drain water 2 into the pump body 8 from the water pumping port 9 formed at the lower end of the casing 10, and to drain the drain water 2 Water is drained from the discharge port 12 to the outside via the drain hose 13.

Next, the operation of the drain water draining device in the air conditioner will be described. Drain water generated by operating the air conditioner is dropped and stored in a drain pan 1 disposed below the heat exchanger, and when the water level rises, a float 4 having a drain pump 3 follows the same. Rise. Then, when the water level of the drain water 2 rises to a preset position, the motor 7 and the drain pump 3 operate based on the detection value of the float switch 14 to drive the blade 11 to rotate and move the blade 11 to the lower end of the casing 10. The drain water 2 is sucked into the pump main body 8 from the formed pumping port 9, and the sucked drain water 2 is drained to the outside from the discharge port 12 through the drain hose 13.

When the drain water is drained in this manner, the water level of the drain water 2 is lowered accordingly. However, the float 4 provided with the drain pump 3 also follows the drain water and descends. The distance between the position of the water pumping port 9 of the drain pump 3 arranged in the drain pan 1 and the surface of the drain water 2 in the drain pan 1 is kept constant.

Thus, the blade 1 of the drain pump 3
1 can be prevented from hitting the water surface or inhaling air, thereby preventing occurrence of abnormal noise.

When the water level of the drain water 2 further drops and the water level of the drain water 2 drops to a preset position, the motor 7 and the drain pump 3 are stopped based on the detection value of the float switch 14. Stop draining.

[0021]

According to the drain water draining device of the air conditioner of the present invention, the drain water draining device of the air conditioner is provided with a float floating and sinking in the drain pan following the fluctuation of the drain water level. In addition to installing the drain port of the drain pump on the float, the distance between the position of the drain port and the surface of the drain water in the drain pan can be kept constant. Even if the water level of the water drops, the discharge amount does not change and drainage can be performed efficiently, and the blade of the drain pump does not hit the water surface or suck in air,
Generation of abnormal noise can be prevented. In addition, there is no restriction on the shape of the drain pan. For example, by forming the drain pan deeply, the capacity of the drain pan can be increased, and the operating efficiency of the drain pump can be improved.

Further, the float is supported by a guide installed in the drain pan so as to be able to move up and down, so that the float follows the water level of the drain water, and the float is raised and lowered smoothly and accurately. Can be kept constant with high accuracy.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing one embodiment of a drain water drainage device in an air conditioner of the present invention.

FIG. 2 is an explanatory diagram showing a drain water drainage device in a conventional air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drain pan 2 Drain water 3 Drain pump 4 Float 5 Guide 6 Drive shaft 7 Motor 8 Pump body 9 Pumping port 10 Casing 11 Blade 12 Discharge port 13 Drain hose 14 Float switch

Claims (2)

[Claims] 1. A pump that floats and sinks following a change in the level of drain water in a drain pan provided in an air conditioner, and a water pumping port of a drain pump is attached to the float. A drain water drain device for an air conditioner, wherein a distance between a position of a mouth and a surface of drain water in a drain pan is kept constant. 2. The drain device for drain water in an air conditioner according to claim 1, wherein the float is supported by a guide installed in a drain pan so as to be able to move up and down.