JP3231574B2 - Drain water drainage for air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain water draining device which flows out of an air conditioner by a drain pump.

[0002]

2. Description of the Related Art In general, a wall-mounted air conditioner is installed near a ceiling facing a wall facing the inside or outside of a room. Therefore, drain water discharged from the air conditioner is discharged to the outside by gravity through a drain pipe connected to a drain pipe of the air conditioner. However, when it is desired to install an air conditioner at an indoor position far from a wall facing the outdoor, the distance to reach the outdoor becomes long, and a long drain pipe is exposed indoors. Therefore, when constructing an apartment or house, a drain pipe is provided in the wall that separates the rooms.

[0003]

However, if an apartment or a house has already been built and the drainage pipe is not provided in the wall, a long drainage pipe is exposed indoors, so that the indoor beauty Was impaired. Alternatively, an expensive ceiling-mounted air conditioner was used to drain the water through the ceiling.

[0004]

In order to solve the above-mentioned problems, in the drain water draining device, the drain water flowing from the air conditioner 2 is once collected in a collection tank 8. When the drain water collected in the collection tank 8 rises to a certain water level 22, the pump 9 is operated by rotating the motor 9 based on the detection of the water level of the float sensor 7, and the drain water of the air conditioner collected in the tank is pumped up. Further, when the amount of water in the collection tank abnormally increases due to a failure of the pump or clogging of the drain pipe, and reaches the warning water level 23, a warning of the water level abnormality is issued by the lamp 21 or a buzzer.

The drain pipe 4 for pumping drain water of the air conditioner is provided with a check valve 28 having a notch in a part thereof.

[0006]

With this device, drain water can be drained through a drain pipe above and below the ceiling without exposing a long drain pipe indoors at any place. In addition, this device does not always operate the drain pump when the air conditioner is operating,
When a certain amount of drain water is accumulated, the drain water is drained. When used in combination with a wall-mounted air conditioner, an inexpensive air-conditioning system can be provided as compared with a ceiling-mounted air conditioner.

After drain water is drained through a drain pipe above the ceiling, even if drain water remains in the pipe, the drain water gradually returns to the tank by its own weight because part of the check valve is cut off. To go. Therefore, the drain water does not suddenly flow backward to generate an unpleasant water sound, and the motor is not overloaded even when the pump motor is restarted.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a drain water drainage device will be described with reference to the drawings. FIG. 1 is a perspective view of the drainage device, and FIG. 2 is a system diagram of the air conditioner 2 and the drainage device 3. The first embodiment of the present invention will be described with reference to these drawings. A collection tank 8 for collecting drain water discharged from the air conditioner 2 and a DC motor 9
And a control circuit 6. A float sensor 7 having two contacts is provided inside the collection tank 8.
Since the float sensor 7 has two contact points, it can detect two kinds of water levels and output signals respectively.
A drain pump 11 is provided inside the collection tank 8, and the drain pump main body 11 is connected to a DC motor 9 provided outside the collection tank 8. The drain pipe 4 connected to the drain pump body 11 penetrates the drain device cover 12. A water level abnormality lamp 21 that is turned on / off by a signal from the control circuit 6 is provided on the surface of the drainage device cover 12.

Next, the operation of the drainage device will be described.
The drain water discharged from the air conditioner 2 is collected in a collection tank 8 in the drainage device, and the water level rises. Float sensor 7
Can detect two types of water levels and output signals respectively. When the drainage start water level 22 is reached, the float sensor 7 detects the water level and the control circuit 6 is operated, so that the DC motor 9 is turned to pump the drain water onto the ceiling 1. The pumped drain water is drained outside along a drain pipe 4 having a slope.

When the drain water in the collection tank 8 reaches the abnormal water level 23 due to the failure of the DC motor 9 or the clogging of the drain pipe 4, the float sensor 7 detects and turns on the water level abnormal lamp 21. Notify the user of the abnormality.
In addition to the water level abnormality lamp, a warning buzzer may be sounded, or a signal for stopping the air conditioner 2 may be output to the air conditioner 2.

FIG. 3 is a sectional view of a drain pump for drain water. The DC motor 9 is mounted on the motor mounting plate 13 with screws, and the motor mounting plate 13 is mounted on the drainage pump main body 11 with screws. The shaft of the DC motor 9 is connected to a shaft 16 via a coupling 14, and the tip of the shaft 16 is connected to a pump blade 15.

FIG. 4 is a control flowchart of the motor. First, in step S101, it is determined from the output of the float sensor 7 whether or not the drain water has the abnormal water level 23. If the water level is abnormal 23, the water level abnormal lamp 21 is turned on (S1).
02). If not the abnormal water level 23, the abnormal water level lamp 21 remains off (S103).

In step S104, it is determined from the output of the float sensor 7 whether or not the drain water has reached the drain start water level 22. If the drainage start water level 22 has been reached, the process proceeds to step S105. If the drainage start water level 22 has not been reached, the process returns to step S101 and the DC motor 9 does not operate. This prevents the DC motor 9 from always rotating when the air conditioner 2 is operating, thereby saving power consumption.

In step S105, the DC motor 9 starts operating and drains drain water for a predetermined time (S106).
The operation of the DC motor 9 is stopped (S107). Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a sectional view of the drainage device. In order to suppress vibration of the motor, a vibration absorbing material 10 is attached between the DC motor 9 and the drain pump main body 11. Further, a vibration absorbing material is also attached to the motor fixing screw 19. This minimizes resonance due to motor vibration. Further, a sound insulating material 5 is attached to the inner wall of the device cover 12 so that the noise of the motor itself does not leak outside.

Further, in order to reduce the noise of the motor itself, a sound insulating box 17 may be formed as shown in FIG. 6, and a sound insulating material 24 may be attached to the inner wall. Next, a third embodiment of the present invention will be described with reference to FIGS. As described in the first embodiment and the second embodiment, the drain water pumped by the drain water draining device of the air conditioner 2 is lifted above the ceiling 1 through the drain pipe 4, and is drained to the outside by gravity.

However, even if drainage of the drain water in the collection tank 8 is completed and the drainage pump 11 is stopped,
Drain water that does not reach the highest point remains in the drain pipe 4.
Therefore, when the drain pump 11 stops, the drain water remaining in the drain pipe 4 flows back through the drain pipe 4 and returns into the tank 8. At this time, since the drain water returns to the collection tank 8 rapidly, a loud water noise is generated. In order to prevent the occurrence of this water noise, it is conceivable to completely stop the reverse flow of the drain water by providing a check valve which completely prevents the reverse flow of the drain water at the discharge port of the drain water of the pump. However, when the DC motor 9 is restarted, the DC motor is momentarily overloaded due to the water pressure of the drain water remaining in the drain pipe. Therefore, the DC motor 9 is adversely affected.

Therefore, the drainage device 3 of the third embodiment is provided with a backflow suppression valve 28 for suppressing backflow. FIG. 7 is a cross-sectional view of the drain water draining device 3, in which a check valve 28 is provided at the drain water discharge port. FIG. 8 is a perspective view of the check valve 28. The backflow suppression valve 28 is provided with an appropriate gap A without completely closing the valve so that the backflow drain water is gradually returned to the collection tank 8.

FIG. 9 shows the drainage pump main body 1 during operation of the pump.
FIG. 1 is a cross-sectional view of FIG. 1 in which a check valve 28 is open. FIG. 10 shows the drain pump body 11 immediately after the pump is stopped.
FIG. 4 is a cross-sectional view, and the valve of the check valve 28 is closed,
The tube is not completely closed. With reference to these figures, the operation of the check valve 28 will be described. The drain water discharged from the air conditioner 2 is collected in the collection tank 8, and when the drain water reaches the drain start position 22, the drain water is pushed up the check valve 28 to be pumped onto the ceiling 1. The pumped drain water is drained outside along a drain pipe 4 having a slope.

When drain water is drained for a predetermined time and the water level reaches the drain end water level 25, the control circuit 6 stops the DC motor 9. In this state, drain water remains in the drain pipe 4 as shown in FIG. This backflow inhibiting <br/> valve 28 hydraulically drain water is closed, the backflow suppression drain water shown in FIG. 8
Gradually returned to the collection tank 8 from the gap A of the control valve 28.

Therefore, since the drain water in the drain pipe gradually returns to the tank, it does not suddenly flow backward to generate an unpleasant water noise, and a quiet environment can be provided. Further, when the DC motor 9 is restarted, the drain water in the drain pipe is exhausted and the DC motor 9 is not overloaded, so that the DC motor 9 is not adversely affected.

[0021]

According to the drainage drainage device of the present invention, the drainage pipe can be brought to the ceiling and the drainage pipe can be fitted to the ceiling without having to put a long drainage pipe on the indoor wall. Therefore, the degree of freedom in installing the air conditioner can be increased. In addition, if the amount of water in the collection tank increases abnormally due to a pump failure or clogging of drain pipes, a lamp or buzzer etc. is used to notify the water level abnormality, so that measures such as stopping the air conditioner can be taken. It is.

Further, the drain water draining device prevents a sudden backflow of the drain water remaining in the drain pipe, so that the water noise can be suppressed and a quiet environment can be provided. Moreover, since the pump motor is not overloaded, there is no adverse effect on the motor.

[Brief description of the drawings]

FIG. 1 is a perspective view of a drainage device.

FIG. 2 is a system diagram of a drain water drainage device combined with an air conditioner.

FIG. 3 is a drain water drainage pump using a small DC motor.

FIG. 4 is a control flowchart of the drainage device.

FIG. 5 is a sectional view of an air conditioner drain water drainage device.

FIG. 6 is a pump motor part to which a sound insulation box is attached.

FIG. 7 is a sectional view of a drain water drainage device.

FIG. 8 is a perspective view of a check valve.

FIG. 9 is a cross-sectional view of the drain water drainage device during operation of the pump.

FIG. 10 is a sectional view of the drain water drainage device immediately after the pump is stopped.

[Explanation of symbols]

 6 ··· Drain water drainage pump control circuit 13 ··· Motor mounting plate 14 ··· Coupling 15 ··· Pump blade 16 ··· Pump shaft 20 ··· Air conditioning drain water 22 ··· Drain start water level 23 ··· Abnormal water level 25 ··· Drain end water level 28 ··· Check valve

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24F 1/00 361

Claims (1)

(57) [Claims] A collection tank for storing drain water flowing out of a drain pipe of an air conditioner; a pump for pumping the drain water in the collection tank provided in the collection tank; a motor for rotating the pump; Sensor means for detecting the level of the drain water stored in the collection tank, a control circuit for controlling the motor based on the water level detected by the sensor means, and an upwardly extending drain for discharging the drain water pumped by the pump A drain water drain device for an air conditioner, comprising: a drain pipe; and a check valve provided in the drain pipe and having a notch in a part thereof.