KR100317288B1 - Method for controlling drain pump of the air conditioner - Google Patents

Abstract

In the air conditioner provided with the sump, a first water level sensing unit for sensing a first set water level preset in the water reservoir, and a second water level sensing unit for sensing a second set water level preset in the water tank And a drain pump configured to discharge the condensed water accumulated in the drain container to the outside according to the level detection result of the first level detector and the second level detector. By accurately detecting the amount of condensate and controlling the operation of the drainage pump, the reliability can be maximized.

Description

Method for controlling drain pump of the air conditioner

The present invention relates to an air conditioner, and more particularly, to a method for controlling a drain pump of an air conditioner.

In general, an air conditioner is a device that cools a room by replacing hot air with cold air, and is mainly composed of an indoor unit installed indoors and an outdoor unit installed outdoors.

As the blower fan constituting the indoor unit rotates, the air introduced through the suction grill is exchanged with the cold refrigerant of the evaporator and discharged into the room through the discharge grill.

In addition, the outdoor unit is composed of a compressor for compressing the refrigerant into a high temperature and high pressure state, a condenser through which the high temperature and high pressure refrigerant passes and a fan to assist the condensation process.

The condenser condenses the refrigerant into a liquid state, and the liquid state refrigerant becomes a low-temperature and low-pressure refrigerant while passing through a capillary tube installed at the inlet of the evaporator of the indoor unit.

The air conditioner as described above is usually divided into a unitary type and a separate type, and a conventional separate type air conditioner is divided into an indoor unit and an outdoor unit. It is to exhaust the heated heat out.

Hereinafter, with reference to the accompanying drawings as follows.

1 is a block diagram schematically illustrating an apparatus for controlling a drain pump of an air conditioner according to the prior art, and FIG. 2 is a flowchart illustrating a method for controlling a drain pump of an air conditioner according to the prior art.

As shown in FIG. 1, the prior art is provided with a water level sensing unit 2 for sensing the level of condensate accumulated in a sump (not shown) and a sensing result value of the water level sensing unit 2. The control unit 1 for outputting a control signal to the control unit, the drain pump control unit 3 for controlling the driving of the drain pump (not shown) by receiving the control signal from the control unit 1, and the control signal from the control unit 1 It is composed of a load driving unit (4) for receiving and driving the load.

When condensate water is set above the water level (not shown), the water level detecting unit 2 detects this, and the drain pump control unit 3 drives the water drain pump (not shown). Drain the condensate outside.

The driving method of the drain pump control apparatus of the air conditioner configured as described above will be described with reference to FIG. 2.

Referring to Figure 2, the prior art determines whether the cooling operation (S1), if the cooling operation determines whether the water level detection unit is open (S2). Here, when the water level is detected, the water level is converted from the short state to the open state.

Therefore, when the water level detection unit is open, the water level is detected and the drain pump is turned on (S3), and the compressor is driven (S4).

In addition, if the water level detecting unit is in a short state, the amount of condensed water is not accumulated as much as the sensing water level, and thus the driving of the compressor is stopped (S5).

Then, it is determined whether the set time has elapsed after the compressor driving stop (S6). If the set time has not elapsed, the drain pump is turned on (S7), and if the set time has elapsed, an error process is performed (S8).

However, the apparatus and method for controlling the drainage pump of an air conditioner according to the related art have a problem of lowering reliability by leaking due to a failure of the drainage pump or the water level sensing unit.

The present invention has been made to solve the above problems, and the object of the present invention is to provide a drainage pump control method of an air conditioner equipped with a plurality of water level detection unit to detect an abnormal state and prevent malfunction. have.

1 is a block diagram showing a drainage pump control apparatus of the air conditioner according to the prior art

2 is a flow chart illustrating a method for controlling a drain pump of an air conditioner according to the related art.

Figure 3 is a block diagram showing a drainage pump control apparatus of the air conditioner according to the present invention

Figure 4 is a layout showing the drain pump of the air conditioner according to the present invention

5 is a flowchart illustrating a method for controlling a drain pump of an air conditioner according to the present invention.

Explanation of symbols for main parts of drawings

10: control unit 20: first water level detection unit

30: second water level detection unit 31: drain box

32: drain pump 33: hose

40: drain pump driving unit 50: load driving unit

The present invention provides an air conditioner having a sump, a first level detecting unit configured to sense a first set level set inside the sump, and a second set level sensing the preset second set level inside the sump. And a drain pump for discharging the condensate accumulated in the drain container to the outside according to the level detection result of the water level detection unit and the first water level detection unit and the second water level detection unit. Drain pump control method of the air conditioner according to the present invention for achieving the first water level detecting unit for detecting the first set water level preset in the water tank, the water reservoir, the second set water level preset in the water tank Air tank having a second water level sensing unit for detecting the water and a drain pump for discharging the condensed water accumulated in the drain container to the outside according to the water level detection results of the first and second water level sensing unit In the air conditioner, it is determined whether the first water level sensing unit is open in the cooling operation state, and if the drainage pump is turned on, the operation of the compressor is stopped to determine whether the first set time has elapsed; Determining whether the second water level detector is in an open state after the first set time has elapsed and stopping operation of the air conditioner and displaying a fault state of the second water level detector on the display unit; When the first level sensor is in a short state and the second level sensor is in an open state, the drain pump is turned on, the compressor is stopped, and the failure state of the second set time is determined after indicating the failure state of the first level sensor. And, if the second set time has elapsed, the operation of the air conditioner is stopped and a failure of the drain pump and the first and second water level detection units is indicated. It is makin comprises the step has its features. If described with reference to the accompanying drawings as follows.

3 is a block diagram showing the drainage of the air conditioner according to the present invention, Figure 4 is a layout diagram showing the drainage of the air conditioner according to the present invention.

As shown in FIG. 3, the present invention includes a first water level sensing unit 20 for sensing a first set water level of condensate accumulated in a drain container (FIG. 4 20), and the first water level sensing unit 20. A control unit 10 for controlling the entire system by receiving a first set level detection signal from the second level detector, a second level detecting unit 30 for detecting a second set level when the first level detecting unit 20 is abnormally detected, and A drain pump driver 40 for driving a drain pump (FIG. 4 22) by receiving a control signal of the controller 10 output according to the detection result of the first and second water level detectors 20 and 30; The load driving unit 50 controls the driving of the load according to the control signal of the controller 10.

As shown in FIG. 4, in the drain pump control apparatus of the air conditioner configured as described above, the first water level sensing unit 20 senses the first set water level accumulated in the drain box 31 and the second water level sensing. The unit 30 detects the second set water level accumulated in the drain container 31.

Here, the first and second water level detection units 20 and 30 are configured as a float switch. When the amount of condensed water does not accumulate above the set level, the short level is maintained and the water level is detected. It keeps open state at the time.

The control unit 10 receiving the detection signal of the first water level detection unit 20 drives the drain pump 32. In addition, when an abnormal state occurs in the first water level detecting unit 20, the drain pump 32 is driven by receiving a detection signal from the second water level detecting unit 30.

When the drain pump 32 is driven, the condensed water accumulated in the drain container 31 is discharged to the outside through the hose 33.

The drain pump control method of the air conditioner configured as described above will be described with reference to FIG. 5.

First, the present invention determines whether or not the cooling operation (S11), and if the cooling operation determines whether the first level detection unit is open (S12).

When the first water level detection unit is open, the drain pump is turned on and the compressor is stopped (S13).

After the drain pump is turned on and the compressor is stopped, it is determined whether the first set time has elapsed (S14).

When the first set time has elapsed, it is determined whether the second water level detector is open. If the second water level detector is open, the operation of the air conditioner is stopped and a failure state of the second water level detector is displayed (S15). -S16).

If the first level sensor is in a short state, it is determined whether the second level sensor is in an open state. If the second level sensor is in an open state, the drain pump is turned on, the compressor is stopped, and an abnormal state of the first level sensor is detected. (S17-S18). Then, it is determined whether the second set time has elapsed (S19).

When the second set time has elapsed, the operation of the air conditioner is stopped and a failure state of the drain pump and the first and second water level detection units is displayed (S20).

When the first and second water level sensing units are in a short state simultaneously, the compressor is driven and the drain pump is turned on (S21).

As described above, when the first switch 20 is opened, the compressor is turned off, the drain pump 31 is turned on to discharge condensed water for a predetermined time, and the first water level detector 20 continues after the first set time has elapsed. If it is in the open state, it is determined that the drain pump 32 is defective or the hose 33 is stuck, the operation of the air conditioner is stopped, and an error condition is displayed.

In addition, when the second water level detecting unit 30 is opened while the first water level detecting unit 20 is in a short state, an error state of the first water level detecting unit 20 is displayed, the compressor is turned off, and the drain pump 32 ) To discharge condensate for a certain time. After the second set time has elapsed, the operation of the air conditioner is stopped when the second water level detecting unit 30 is open, and the drain pump 32, the first and second water level detecting units 20 and 30 Indicates an abnormal condition.

On the other hand, if the first water level detection unit 20 is opened, and if the second water level detection unit 30 is immediately opened, an error of the second water level detection unit 30 is displayed and the operation of the air conditioner is stopped. . However, the drain pump 32 is turned off after a certain time operation.

In addition, when the first water level detecting unit 20 and the second water level detecting unit 30 are shorted at the same time, the compressor is judged to be a normal operation state in which condensate is not accumulated.

Drainage pump control apparatus and method of the air conditioner according to the present invention has the effect of maximizing the reliability by controlling the driving of the drainage pump by accurately detecting the amount of condensate accumulated in the drain container by a plurality of water level detection unit. .

Claims (5)

delete delete A first level sensor for sensing a first set level inside the sump, a second level sensor for sensing a second set level preset in the sump, and the first and second level In the air conditioner provided with a drain pump for discharging the condensate accumulated in the drain container to the outside according to the level detection result of the sensing unit, Determining whether the first water level detector is in an open state in a cooling operation state, and when the open state is in the open state, turning on the drain pump and stopping driving of the compressor to determine whether a first set time has elapsed; Determining whether the second water level detector is open after the first set time has elapsed and stopping the operation of the air conditioner if the state is open, and displaying a failure state of the second water level detector on the display unit; When the first water level sensor is in a short state and the second water level sensor is in an open state, the drain pump is turned on, the compressor is stopped, and a failure state of the second set time is determined after indicating the failure state of the first water level sensor. Doing; Stopping the operation of the air conditioner if the second set time has elapsed, and indicating a failure of the drain pump and the first and second water level sensing units. . The method of claim 3, wherein And driving the compressor and turning on the drain pump when the first level detector and the second level detector are in a short state at the same time. The method of claim 3, wherein The first and second set time is set within minutes, the control method of the drain pump of the air conditioner.