JPH09210394A - Detector for drain piping clogging of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent fouling of a room by detecting the reversion of drain water. SOLUTION: A door switch terminal 7 is so arranged in a drain piping 5 to be activated when the drain piping 5 is clogged with impurities, causing the reversion of the drain water. Upon the activation of the door switch terminal 7, the operation of the body 1 of air conditioning equipment is stopped by a controller 6 for controlling the operation thereof thereby preventing the reversion of the drain water, eventually causing the water to spill into the room.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain pipe blockage detecting device for an air conditioner for detecting an abnormality of drain water blockage in a drain pipe.

[0002]

2. Description of the Related Art Conventionally, a method for preventing drain water from overflowing is disclosed in JP-A-3-186139.

The drain water of this kind of air conditioner is generally treated by installing a gradient in the drain pipe during the installation work so that the drain water is flowed out of the room with an inclined force. Hereinafter, the configuration will be described with reference to FIG.

As shown in FIG. 5, the air conditioner main body 101
Inside the fan 102, the heat exchanger 103, and the drain pan 1
04, a drain pipe 105, and a control device 106 for controlling the operation of the air conditioner main body 101.

In the above structure, the blower 102 is operated by the operation signal from the control device 106, and has the function of exchanging heat in the indoor air with the heat exchanger 103. However, when the air conditioner main body 101 is in the cooling operation, Condensation of the air cooled by the heat exchanger 103 on the heat exchanger 103 causes drain water to collect in the drain pan 104. Air conditioner 1
01 Since the drain pan 104 provided in the main body is structurally provided with a gradient, the drain water naturally flows to the drain pipe 105, and the drain pipe 105 is also provided with a gradient during the installation work. Naturally it will be processed outdoors.

[0006]

In such a conventional air conditioner, consideration is given to providing a drain pipe with a gradient during installation work, but there is no regulation on the angle of the gradient and the installation environment varies from site to site. As a result, dust (impurities in the drain water) accumulates in the drain pipe where the angle of the gradient is small, and the drain pipe is blocked and the drain water is not treated outdoors. There was a problem that the room was dirty.

The present invention solves the above problems, and provides a drain pipe blockage detecting device for an air conditioner capable of detecting the reverse flow of drain water and preventing the room from being contaminated. The first purpose.

A second object is to be able to detect clogging in the drain pipe even if the drain pipe is clogged in the air conditioner body and impurities are mixed with drain water to form a sludge. .

A third object is to detect the clogging of the drain pipe in the main body of the air conditioner early and reliably.

A fourth object is to easily detect clogging of the drain pipe in the air conditioner body with a simple structure.

[0011]

In a drain pipe blockage detecting device for an air conditioner of the present invention, a drain pan for receiving drain water dripping from a heat exchanger provided in the body of the air conditioner, and the inside of the drain pan Drain pipe connected to the drain pan so as to discharge the drain water, and a door switch terminal provided in the drain pipe so as to be actuated by hydraulic force when the drain pipe is clogged with impurities and the drain water flows backward. And a control device for controlling the operation of the air conditioner provided via a control device input terminal connected to the door switch terminal, and the operation of the air conditioner is stopped by the control device when the switch terminal is activated. It has a strict configuration.

According to the present invention, it is possible to provide a drain pipe blockage detecting device for an air conditioner capable of detecting the reverse flow of drain water and preventing the room from being contaminated.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is a drain pan for receiving drain water dripping from a heat exchanger provided in a main body of an air conditioner, and drain water in the drain pan. As described above, a drain pipe connected to the drain pan, a door switch terminal provided in the drain pipe so as to operate by hydraulic power when the drain pipe is clogged with impurities and drain water flows backward, and this door switch A control device for controlling the operation of the air conditioner provided via a control device input terminal connected to the terminal, and configured to stop the operation of the air conditioner by the control device when the door switch terminal operates. If the inside of the drain pipe is clogged with impurities and drain water flows backward, the door switch terminal is activated and the controller stops the operation of the air conditioner. By informing the user,
It has the effect of preventing drain water from overflowing the air conditioner and polluting the room.

According to a second aspect of the present invention, the drain pipe is provided with a pressure sensor for detecting a state where the drain pipe is clogged with impurities and drain water is accumulated. The drain pipe has a sludge-like pressure sensor. By detecting the clogging in the inside by pressure, it has an action of stopping the cooling operation as clogging abnormality.

According to the third aspect of the present invention, an optical sensor for detecting a state where impurities are accumulated in the drain pipe is provided, and the impurities in the drain water are accumulated and block the inside of the drain pipe. It has an effect of stopping the cooling operation as a clogging abnormality.

According to the invention of claim 4, an electrode type sensor is provided for detecting a state in which the drain pipe is clogged with impurities and drain water is accumulated. When reaching the portion of the type sensor, it has an action of stopping the cooling operation as a clogging abnormality.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. (Embodiment 1) As shown in FIG. 1, a blower 2, a heat exchanger 3, and a drain pan 4 for receiving drain water dripping from the heat exchanger 3 are provided in a main body 1 of an air conditioner, and the drain pan 4 has a drain. A drain pipe 5 is provided to drain the water,
A control device 6 for controlling the operation of the main body 1 of the air conditioner is provided.

The drain pipe 5 is provided in the drain pipe 5.
When the inside is clogged with impurities and the drain water flows backward, the door switch terminal 7 is activated by the hydraulic force of the drain water flowing backward.
The door switch terminal 7 is connected to the control device 6 through the control device input terminal 8, and when the drain water flows in the drain pipe 5 and is drained, the door switch terminal is at the position b, and the door switch terminal 7 Is operated in the direction of a, the operation of the main body 1 of the air conditioner is stopped by the control device 6.

In the above structure, the blower 2 has the controller 6
The air is cooled by the heat exchanger 3 when the main body 1 of the air conditioner is in the cooling operation. Condensation on the drain water drains the pan 4
Accumulate in Further, since the drain pan 4 provided in the main body 1 of the air conditioner is structurally provided with a gradient, the drain water naturally flows into the drain pipe 5 and the drain pipe 5 is also provided with a gradient during installation work. Therefore, the drain water is naturally treated outdoors, but impurities in the drain water accumulate due to the condition of the building and the angle of the slope of the drain pipe 5, and the drain water is blocked inside the drain pipe 5. , The door switch terminal 7 is pushed up by the hydraulic force of the drain water (usually the door switch terminal 7 also moves in the b direction because the drain water flows in the b direction).
The fact that the drain water is flowing back to the control device 6 by contacting the control device input terminal 8 by moving in the direction is input as a clogging abnormality of the drain pipe 5, and the control device 6 does not flow the drain water any more. Also, a signal for abnormally stopping the cooling operation is transmitted to notify the user of the abnormality.

(Second Embodiment) As shown in FIG. 2, a pressure sensor 9 for delicately detecting the pressure is provided in the drain pipe 5A, and the pressure sensor 9 and the control device 6A are connected via a signal line 10.

In the above structure, by providing the pressure sensor 9 in the drain pipe 5A, impurities in the drain water accumulate and block the inside of the drain pipe 5A, and when a pressure higher than the pressure in the pressure sensor 9 is detected, the drain pipe 5A is detected. Pressure sensor 9
Is input to the control device 6A through the signal line 10 as a clogging abnormality, and the control device 6A transmits a signal for abnormally stopping the cooling operation in order to prevent drain water from flowing any more, and the user is also informed of the abnormality. Make sure you know that there is.

(Embodiment 3) As shown in FIG. 3, an optical sensor 11 for delicately detecting foreign matter is provided in the drain pipe 5B, and the optical sensor 11 and the control device 6B are connected via a signal line 10A.

In the above structure, by providing the optical sensor 11 in the drain pipe 5B, the impurities in the drain water can be constantly monitored, the impurities are accumulated and the drain pipe 5B is blocked, and the drain water is not treated outdoors. At this time, the optical sensor 11 is activated and is input as a clogging abnormality to the control device 6B, and the control device 6B transmits a signal for abnormally stopping the cooling operation in order to prevent drain water from flowing any more, and the user is also in an abnormal condition. Be sure to inform.

(Embodiment 4) As shown in FIG. 4, an electrode type sensor 12 and a control device 6C are provided at both ends of a cross section of a part of the drain pipe 5C.
And the control device 6C are connected via the signal line 10B.

In the above structure, the electrode type sensor 12 is provided at an opposing portion in the drain pipe 5C, and the drain pipe 5C is provided.
When impurities are accumulated inside and the drain water reaches the portion of the electrode type sensor 12, a weak current flows between the electrodes through the drain water, and is input as a clogging abnormality to the control device 6C through the signal line 10B. Sends a signal to stop the cooling operation abnormally in order to prevent drain water from flowing any more,
Be sure to inform the user that something is wrong.

[0026]

As described above, according to the first aspect of the present invention, even if the drain pipe is clogged and drain water flows backward, the door switch terminal operates and the cooling operation is performed by the control device via the control device input terminal. By stopping and notifying the user, it is possible to prevent drain water from overflowing from the main body of the air conditioner and polluting the room.

Further, according to the second aspect of the present invention, since the pressure sensor for detecting the state in which the drain water is accumulated is provided in the drain pipe, even if impurities are mixed with the drain water in the drain pipe to form a sludge. Blockage in the drain pipe can be detected.

Further, according to the third aspect of the invention, since the optical sensor for detecting the state where the drain water is accumulated in the drain pipe is provided, the clogging of the drain pipe can be surely detected early.

According to the fourth aspect of the invention, since the electrode type sensor for detecting the state where drain water is accumulated in the drain pipe is provided, clogging in the drain pipe can be easily detected with a simple structure.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an air conditioner provided with a drain pipe clogging detection device for an air conditioner according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram of an air conditioner provided with a drain pipe clogging detection device for an air conditioner according to a second embodiment of the present invention.

FIG. 3 is a schematic diagram of an air conditioner provided with a drain pipe clogging detection device for an air conditioner according to a third embodiment of the present invention.

FIG. 4 is a schematic diagram of an air conditioner provided with a drain pipe clogging detection device for an air conditioner according to a fourth embodiment of the present invention.

FIG. 5 is a schematic diagram of an air conditioner provided with a drain pipe clogging detection device for a conventional air conditioner.

[Explanation of symbols]

 1 Air Conditioner Main Body 3 Heat Exchanger 4 Drain Pan 5 Drain Piping 5A Drain Piping 5B Drain Piping 5C Drain Piping 6 Control Device 6A Control Device 6B Control Device 6C Control Device 7 Door Switch Terminal 8 Control Device Input Terminal 9 Pressure Sensor 11 Optical Sensor 12 electrode type sensor

Claims (4)

[Claims] 1. A drain pan for receiving drain water dripping from a heat exchanger provided in a main body of an air conditioner, and a drain pipe connected to the drain pan for draining drain water in the drain pan, Provided via a door switch terminal provided in the drain pipe so as to be operated by hydraulic power when the drain pipe is clogged with impurities and drain water flows backward, and a control device input terminal connected to the door switch terminal A controller for controlling the operation of the air conditioner, wherein the control device stops the operation of the air conditioner when the door switch terminal is actuated. 2. The clogging detection device for a drain pipe of an air conditioner according to claim 1, further comprising a pressure sensor for detecting a state where the drain pipe is clogged with impurities and drain water is accumulated. 3. The clogging detection device for a drain pipe of an air conditioner according to claim 1, further comprising an optical sensor for detecting a state where impurities are accumulated in the drain pipe. 4. The clogging detection device for a drain pipe of an air conditioner according to claim 1, further comprising an electrode sensor for detecting a state where the drain pipe is clogged with impurities and drain water is accumulated.