JPH0752496Y2 - Drain drainage device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain drainage device for draining drainage of a ceiling-embedded air conditioner in a building air conditioner or the like.

[0002]

2. Description of the Related Art Recently, in office buildings, public buildings and the like, an individual air conditioning system in which an air conditioner is installed in a ceiling portion of each room is often adopted from the viewpoint of energy saving and space saving. .

In this system, the drainage generated by the operation of the air conditioner is a drainage drain having a downflow gradient in the space between the ceiling plate and the upper floor plate (hereinafter referred to as "ceiling space"). A pipe was attached and it was discharged to the outside by the natural flow-down action using the height difference.

When the height difference cannot be obtained, the drain accumulated in the air conditioner drain pan is temporarily pumped up to the upper part of the air conditioner by a pump for raising water called a drain up mechanism to secure the height difference and drop the head from there. Was discharged to outside.

[0005]

However, in many cases, the building is constructed by saving the space between floors as much as possible in order to save space and the budget of the building cost. Therefore, the ceiling part is inevitable. It is configured to be narrow. In addition, a large number of structures such as beams, wiring for lighting / communication equipment, and upper and lower drainage pipes are arranged at the ceiling foot.

For this reason, when installing the drain drainage pipe, it is necessary to make a hole in the beam or the like that blocks the pipe. For example, the drainage drainage pipe should be installed in the ceiling basin with an appropriate slope. It was extremely difficult to install.

Moreover, since the gradient of the drain drain pipe cannot be sufficiently ensured, the inside of the pipe is likely to be clogged with a little dust flowing into the drain drain pipe, and as a result, the drain from the air conditioner drain pan is drained. There was a problem that there was a large risk of overflow accidents and flood accidents. Moreover, in the past, even if the drain overflows from the drain pan, no appropriate flood accident prevention measures such as forcibly stopping the operation of the air conditioner and activating an alarm device have been taken. It was easy to become.

The present invention has been made in view of the above circumstances, and is a drainage drainage device capable of draining drainage safely and reliably regardless of the size of the ceiling foot or the presence of obstacles arranged at the ceiling foot. Is intended to be provided.

[0009]

In order to solve the above-mentioned problems, the present invention provides a first tank for always holding a predetermined degree of vacuum and sucking and collecting drain discharged from an air conditioner, and the first tank. A second tank to which drain is supplied from the first tank, a main valve that controls the supply of the drain from the first tank to the second tank, and the main valve that opens when the main valve is in the closed state. It is composed of an atmosphere release valve for opening the inside of the second tank and a drain valve for controlling the drain discharge in the second tank.

[0010]

Since the inside of the first tank always maintains a predetermined degree of vacuum, the drain discharged from the air conditioner is sucked and collected into the first tank. At this time, the main valve is in the open state, and the drain collected in the first tank is transferred to the second tank whose inside is depressurized due to the depressurization in the first tank. Supplied. When a predetermined amount of drain is accumulated in the second tank, the main valve is closed to cut off the communication between the inside of the first tank and the inside of the second tank, and then the atmosphere opening valve and the drain valve are opened. Then, the drain in the second tank is discharged. When the drain discharge from the second tank is completed, the atmosphere opening valve and the drain valve are closed again, and then the main valve is opened and the insides of the first and second tanks communicate with each other, The drain is again supplied from the first tank to the second tank.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the device of the present invention. A vacuum tank body A and a number of terminal units B connected to the vacuum tank body A via a drain recovery pipe 1. Is shown.

The vacuum tank body A is installed in the underground machine room or pipe shaft of a building such as an office building. The main body A includes a first tank 2 which is a closed tank, and a water-sealed vacuum pump 3 is connected to the first tank 2 by using a pipe such as a steel pipe or a synthetic resin pipe.
Then, the inside of the first tank 2 is decompressed by the operation of the vacuum pump 3. Reference numeral 4 in the drawing is a check valve for preventing backflow of the atmosphere into the depressurized first tank 2 when the vacuum pump 3 is stopped.

The first tank 2 includes the vacuum pump 3
Is a tank that sucks and collects and stores the drain generated from the air conditioner 20. The tank 2 has a pressure gauge 5 that indicates the magnitude of the tank internal pressure, and the vacuum pump 3 that detects the tank internal pressure. And a pressure switch 6 for controlling the operation of the tank 2 and keeping the degree of vacuum in the tank 2 always constant.

One end 7a of a connecting pipe 7 is connected to the lower portion of the first tank 2 and the other end 7 of the connecting pipe 7 is connected.
b is connected to the upper part of the second tank 8 which is a closed tank smaller than the first tank 2. The connecting pipe 7
In the middle of the process, the main valve 9 consisting of an electric valve or a solenoid valve
The inside of the first tank 2 and the inside of the second tank 8 can be freely opened and closed by opening and closing the main valve 9. Therefore, when the main valve 9 is open, the insides of the first and second tanks communicate with each other, so that the internal pressure of the second tank 8 is reduced by the vacuum pump 3. At the same time as the internal pressure of the tank 2, the drain sucked and collected in the first tank 2 flows into the second tank 8. The main valve 9 is normally open.

The second tank 8 is provided with an atmosphere opening valve 10 which is an electromagnetic valve for opening the atmosphere inside the second tank 8. Further, a drain pipe 11 is connected to a lower portion of the second tank 8 and the drain pipe 11
A drain valve 12, which is an electromagnetic valve for controlling drainage from the second tank 8, is provided in the. Both the atmosphere release valve 10 and the drain valve 12 are opened after the main valve 9 is completely closed. On the contrary, the main valve 9 is configured such that the atmosphere release valve 10 and the drain valve 12 are completely closed. It will close and then open.

In the second tank 8, the main valve 9 is sensed by sensing the water level of the drain supplied into the second tank 8.
A float switch 13 is attached as a water level detection sensor that opens and closes. The float switch 13 closes the main valve 9 when the drain in the second tank 8 reaches or exceeds a predetermined water level, and shuts off the communication between the insides of the first and second tanks. At this time, as described above, since the main valve 9, the atmosphere release valve 10 and the drain valve 12 are interlocked so as to operate in reverse, the atmosphere release valve 10 and the drainage valve are closed after the main valve 9 is closed. The valve 12 and the valve 12 are simultaneously opened, and the drain stored in the second tank 8 is discharged to the outside of the apparatus through the drain pipe 11. Then, when the drainage from the second tank 8 is completed, the atmosphere release valve 10 and the drainage valve 12 are both closed, the main valve 9 is opened, and the internal pressure of the first tank 2 and the second Becomes equal to the internal pressure of the tank 8, and the drain flow into the second tank 8 is started.

Next, the terminal unit B will be described.

An air conditioner 20 is installed at the ceiling of each floor or room of the building to which the device of the present invention is applied.
In the vicinity of each air conditioner 20, a water tank 21 for receiving drain generated by the operation of the air conditioner 20 is provided. Each of the water tanks 21 is provided by a method such as being fixed to the lower surface of the floor on the upper floor with a hanging bolt, or fixed to the air conditioner 20 using a mounting bracket.

A suction pipe 22 for sucking the stored drain in the direction of the first tank 2 is inserted into each of the water tanks 21. The suction tube 22 is made of a flexible tube such as a copper tube or a nylon tube having an outer diameter of about 6 mm which is heat-insulated to prevent dew condensation on the surface.
It is connected to the branch pipe 13 that branches from the drain recovery main pipe 1 communicating with the above to each floor of the building. The suction tube 22 is
Since it is composed of the thin flexible tube as described above, it is possible to easily perform piping while avoiding obstacles even in a narrow ceiling where there are many obstacles, and it is possible to perform piping work in a short time without requiring skilled workers. .

Each suction pipe 22 is provided with a terminal unit valve 23 which is an electromagnetic valve for controlling the movement of the drain from the water tank 21 to the drain recovery main pipe 1.

Further, the water tank 21 is provided with a water level detection sensor 24 for detecting the water level of the drain stored in the water tank 21. The sensor 24 sends a signal to the terminal unit valve 23 to open the terminal unit valve 23 when the drain in the water tank 21 reaches a predetermined amount or more,
When the drainage in the water tank 21 falls below a predetermined amount, the terminal unit valve 23 is closed.

Further, at an appropriate position of the water tank 21,
An overflow detection sensor 25 is provided which is activated when the drain in the water tank exceeds a limit amount. The overflow detection sensor 25 is interlocked with the air conditioner 20, and if the water level in the water tank 21 abnormally rises, the operation of the air conditioner 20 is stopped and an alarm is issued to the outside. There is.

Reference numeral 26 in the figure denotes a filter for preventing dust or the like contained in the drain from being sucked into the suction pipe 22, and the drain recovery main pipe 1, the first tank 2 and the second drain The filter 2 is provided at an appropriate position of the connection pipe 7 and the drain pipe 11 that connect to the tank 8 of
Strainer 1 for filtering fine dust that has passed 6
4, 15, and 16 are provided, respectively.

The operation of the apparatus according to this embodiment configured as described above will be described. In each of the terminal units B, the operation of the air conditioner 20 provided at the ceiling of each floor or room of the building is performed. The generated drain is stored in the water tank 21 provided adjacent to each air conditioner 20. At this time, the terminal unit valve 23 is closed. Then, when a predetermined amount or more of drain is accumulated in each water tank 21, the water level detection sensor 24 is activated to open the terminal unit valve 23.

Since the first tank 2 is depressurized by the operation of the vacuum pump 3 as described above,
When the terminal unit valve 23 is opened, the drain in the water tank 21 flows from the suction pipe 22 through the branch pipe 13 and the drain recovery main pipe 1 to the first tank 2
It is sucked and collected inside. The water tank 21 is obtained by the suction recovery.
When the water level of the drain inside falls below a predetermined height, the water level detection sensor 24 is activated again and the terminal unit valve 23 is closed.

Although the suction pipe 22 is made of a flexible pipe having a small diameter as described above, the drain is sucked up by the suction action of the depressurized first tank 2, There is little risk that the suction tube 22 will be clogged.

The drain suctioned and collected in the first tank 2 flows into the second tank 8 through the connecting pipe 7. Since the main valve 9 provided in the connection pipe 7 is in an open state in a normal state, the internal pressure of the second tank 8 is equal to the internal pressure of the first tank 2.

When a predetermined amount or more of drain is stored in the second tank 8, the float switch 13 provided in the second tank 8 is actuated, and the main valve 9 is closed, The atmosphere opening valve 10 and the drain valve 13 are opened. As a result, the drain stored in the second tank 8 is discharged to the outside of the device.

When the discharge is completed, the float switch 13 is actuated again to close the atmosphere opening valve 10 and the drain valve 12, and then the main valve 9 is opened. When the main valve 9 is opened, the first tank 2
The internal pressure of the tank rises until it becomes equal to the internal pressure of the second tank 8, but the vacuum pump 3 is operated in the first tank 2 in accordance with the change of the tank internal pressure to keep the tank internal pressure constant. Since the pressure switch 6 is provided for this purpose, the internal pressures of the first and second tanks immediately return to a predetermined vacuum level.

By repeating the above operation, the drain generated from a large number of air conditioners can be safely and reliably discharged to the outside.

[0032]

According to the present invention, since the drain generated by the operation of the air conditioner is continuously sucked and collected, the drain water can be drained safely and surely no matter where the air conditioner is installed. You can

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the device of the present invention.

[Explanation of symbols]

 2 First tank 8 Second tank 9 Main valve 10 Atmosphere opening valve 12 Drain valve 20 Air conditioner

Claims (1)

[Scope of utility model registration request] 1. An air conditioner (2) which maintains a predetermined degree of vacuum at all times.
0) sucking and collecting the drain discharged from the first tank (2), the second tank (8) to which the drain is supplied from the first tank (2), and the first tank (2). ) To control the supply of drain to the second tank (8), and when the main valve (9) is in the closed state, the main valve (9) is opened to open the inside of the second tank (8). Atmosphere release valve (10) for opening the drain and a drain valve (12) for controlling drain discharge in the second tank (8)
A drainage device comprising: