JP4601059B2 - Drain drainage equipment - Google Patents

Description

  The present invention relates to a drain drainage facility for discharging drain water generated in an air conditioning facility.

  As shown in FIG. 5, drain water Dw from the air conditioner is generally drained through a drain pipe L101 and a water-sealed drain tank 102. In particular, in a large-scale facility, the wastewater is collected from the water-sealed drain tank 102 through the drain drain pipe L102 and collected in the indoor distribution system funnel 103 which is a facility shared facility.

  Here, in some facilities, in consideration of overflow to the floor due to problems such as breakage of various drainage pipes including the drain drainage pipe L102, the connection position of the various drainage pipes to the drain funnel 103 is higher than the floor surface Gm. May have to be set to

  For example, in some facilities related to nuclear power, the connection position height H1 of various drain pipes to the drain funnel is set to about 175 mm from the floor surface Gm as a reference surface to ensure safety. In the future, in order to ensure further safety, a higher setting of about 195 mm is required.

  In such a facility, when drain water is drained, when the drain drain pipe L102 is connected to the drain funnel 103 on the same floor, the reference bottom surface Sb of the “water seal height” H2 is removed from the floor surface Gm as shown in FIG. As a result, the drain water Dw accumulates in the casing 101 as a result.

Therefore, in these facilities, as shown in FIG. 6, the drain bottom pipe L102 is connected from the drain tank 102 to the drain funnel on the lower floor so that the reference bottom surface Sb of the sealing water is at a low position. I am trying.
JP 2004-205342 A JP 2001-193122 A JP-A-2002-286192 JP-A-11-94194

  However, in order to connect the drain drain pipe L102 to the funnel on the lower floor, a large-scale construction such as drilling a through hole in the floor G is required, and there is a problem that the amount of work becomes enormous.

  Therefore, the main problem of the present invention is that even when the level of connection between the drain drain pipe and the drain funnel is high, drain water can be drained into the drain funnel on the same floor without using the lower floor funnel, and the casing. An object of the present invention is to provide a drain drainage facility in which drain water does not accumulate.

The present invention that has solved this problem is as follows.
<Invention of Claim 1>
A drain drainage system that drains drain water in a casing of an air conditioner to a drain funnel through a drain tank,
The inside of the casing is made negative pressure and the drain tank has a sealed structure,
The drain tank and the drain funnel are arranged on the same floor,
The drain tank is a water-sealed drain tank that seals the drain pipe from the casing; and
A pressure equalizing pipe connected to the casing and the water-sealed drain tank, and a pressure equalizing valve for opening and closing the pressure equalizing pipe ,
A drain drainage system characterized in that a drain drain pipe extending from the drain tank to the drain funnel extends into the drain funnel, and the drain drain pipe tip is sealed with a water seal trap disposed in the drain funnel. .

(Function and effect)
By opening / closing the pressure equalizing valve, the gas phase portion in the casing and the gas phase portion in the drain tank are communicated or closed via the pressure equalizing pipe, so that the air pressure in the gas phase portion in the casing and the gas in the drain tank are closed. It becomes possible to adjust the balance of atmospheric pressure in the phase part.
Thereby, the drain water in the casing can be appropriately transferred to the drain tank, and the height of the sealing liquid level in the drain tank can be adjusted to an appropriate position.
Therefore, even if the water seal height cannot be ensured, the drain water drainage facility does not accumulate drain water in the casing.
Furthermore, the drain drain pipe that extends from the drain tank to the drain funnel is extended into the drain funnel, and the drain drain pipe tip is sealed with a water-sealed trap placed in the drain funnel, so that the pressure equalizing valve In addition to ensuring that the drain water is trapped when the water is released, the water seal position is adjusted.

<Invention of Claim 2>
A drain drainage system that drains drain water in a casing of an air conditioner to a drain funnel through a drain tank,
The inside of the casing has a negative pressure and the drain tank has a sealed structure.
The drain tank and the drain funnel are arranged on the same floor,
An open / close valve is provided in the middle of each drain pipe from the casing to the drain tank and the drain drain pipe from the drain tank to the drain funnel.
A drain drainage system comprising: a pressure equalizing pipe connected to the casing and the drain tank; and a pressure equalizing valve for opening and closing the pressure equalizing pipe.

(Function and effect)
By opening / closing the pressure equalizing valve, the gas phase portion in the casing and the gas phase portion in the drain tank are closed or communicated via the pressure equalizing pipe, so that the pressure in the gas phase portion in the casing and the gas in the drain tank are It is possible to adjust the balance of the atmospheric pressure of the phase part. Moreover, the transfer / discharge of drain water can be appropriately adjusted by opening / closing the open / close valves of the drain pipe and drain drain pipe.
Therefore, even if the water seal height cannot be ensured, the drainage drainage facility does not accumulate drain water in the casing.

<Invention of Claim 3>
The drain tank is provided with an atmosphere release pipe and an atmosphere release valve that opens and closes the pipe line, and is configured such that the pressure in the air layer in the drain tank is adjusted by opening and closing the atmosphere release valve. Item 3. The drainage facility according to item 1 or 2.

(Function and effect)
By providing the air release pipe and the air release valve, the pressure inside the drain tank can be adjusted without being influenced by the pressure inside the casing with the pressure equalizing valve closed.

<Invention of Claim 4 >
4. A drain drain opening / closing means for opening / closing a drain outlet of a drain drain pipe communicating from a water-sealed drain tank to a drain funnel according to a liquid level position in the drain tank. Drainage.

(Function and effect)
The drain water accumulated in the drain tank can be automatically discharged to the drain funnel, and the drain water can be discharged to the drain funnel while securing the predetermined amount of sealed water. . Further, even when drain water is exhausted in the drain tank, communication between the drain funnel and the drain tank can be prevented.

<Invention of Claim 5 >
The drain drainage system according to any one of claims 1 to 4 , wherein a liquid level gauge for measuring a liquid level in the drain tank is provided.

(Function and effect)
The height of the liquid level in the drain tank can be monitored, and the opening of the pressure equalizing valve and the opening / closing valve can be adjusted accordingly.

  In the conventional equipment, when the drain drain pipe is connected to the drain funnel on the same floor at a high position from the floor surface, the drain water is always accumulated in the casing. The drain drainage system of the present invention adjusts the liquid level position of the sealing water in the drain tank, the balance of the atmospheric pressure in the drain tank and the casing, by operating the pressure equalizing valve, the air release valve, the piping and the drain valve opening / closing valve, It is possible to finely adjust the atmospheric pressure in the drain tank, thereby allowing the drain water stored in the casing to be appropriately moved to the drain tank while reliably trapping the drain water even without a sealing water height. . Therefore, it is not necessary to use the drain funnel on the lower floor in order to ensure the sealing water height, and it is possible to discharge the drain water using the drain funnel on the same floor. Thereby, the installation cost etc. of drain drainage facilities will be reduced significantly.

  The casing of the air conditioning equipment is a part that collects the drain water generated in the heat exchange part, such as a so-called drain pan and housing used in small or general air conditioning equipment and devices, as well as large-scale air conditioning equipment. It is meant to include a relatively large space facility such as a drain water collection tank and a drain water collection chamber that are installed to temporarily collect drain water.

Next, comparative examples and embodiments of the present invention will be described in detail below with reference to the drawings.
( Comparative example )
FIG. 1 is a schematic view of a drain drainage facility of a comparative example . 1 is a casing of the air conditioning equipment, 2 is a drain tank, and 3 is a drain funnel installed on the same floor as the drain tank.

The drain water Dw in the casing 1 of the air conditioner is transferred to the drain tank 2 via the drain pipe L1. In this comparative example , the drain tank 2 is water-sealed, and the drain pipe L1 from the casing 1 is drained. In the tank 2, the front end is extended to the vicinity of the bottom thereof, and is sealed with the sealing water Sw accumulated in the drain tank 2.

  On the other hand, one end of a drain drain pipe L2 is connected to the upper portion of the drain tank 2. The other end of the drain drain pipe L2 is connected to the drain funnel 3 on the same floor. The drain drain pipe L2 is installed with a slight downward slope from the drain tank 2 toward the drain funnel 3, and when drain water accumulates in the drain tank 2 from the connection position of the drain drain pipe L2, The water is configured to be discharged to the drain funnel 3 by natural flow.

  On the other hand, one end of a pressure equalizing pipe La is connected to the upper portion of the drain tank 2 so as to communicate with the gas phase portion Dg of the drain tank 2. The other end of the pressure equalizing pipe La is connected to the gas phase portion Cg of the casing 2. In the middle of the pressure equalizing pipe La, there is provided a pressure equalizing valve Va for operating communication and closing between the drain tank gas phase portion Dg and the casing gas phase portion Cg. By opening and closing the pressure equalizing valve Va, the atmospheric pressure of both gas phase portions Cg and Dg is adjusted.

  When the pressure equalization valve Va is thus opened and the pressure of the casing gas phase portion Cg and the pressure of the drain tank gas phase portion Dg are adjusted, the drain water Dg accumulated in the casing 1 is drained to the drain tank 2. The

  That is, normally, the casing internal pressure (the atmospheric pressure of the gas phase portion Cg in the casing) is lower than the drain tank internal pressure (the atmospheric pressure of the drain tank gas phase portion Dg). In the case of general air conditioning equipment, the casing internal pressure is about -150 mmAq, and the casing internal pressure of large-scale air conditioning equipment such as nuclear power related equipment is about -200 to 300 mmAq, which is two to three times. On the other hand, the pressure in the drain tank gas phase part Dg is equal to or slightly lower than the atmospheric pressure. As described above, when the drain drain pipe L2 is provided at a high position from the floor surface by connecting the drain drain pipe L2 from the drain tank 2 to the drain funnel 3 on the same floor as in this equipment, the casing 1 In this facility, if the pressure equalization valve La is opened, gas flows from the drain tank 2 side to the casing 1 side via the pressure equalization pipe La, and thus the water in the drain tank 2 is accumulated. The seal is released, and accordingly, the drain water Dw accumulated in the casing 1 is transferred to the drain tank 2. Further, the transferred drain water is discharged by natural flow into the drain funnel 3 through the drain drain pipe L2 when an appropriate amount is exceeded in the drain tank. Thereafter, if the pressure equalizing valve Va is closed, the water seal of the drain tank is maintained again. Therefore, even when the water seal height cannot be secured, the drain water Dg is not accumulated in the casing 1, and the water seal can be maintained at a suitable position.

  The specific connection position of the pressure equalizing pipe La to the drain tank 2 and the casing 1 can be set as appropriate, but the pressure equalizing pipe La in the present invention is the gas phase portion Dg in the casing 1 and the drain tank 2. Because it is for adjusting the atmospheric pressure of Cg, considering the capacity of the casing 1 and the drain tank 2, the expected drain water storage amount, etc., both ends of the pressure equalizing pipe La are connected to positions where they are not submerged in drain water or sealed water. It is desirable to do. It does not specifically limit regarding the installation site | part of the pressure equalizing valve Va. It can be installed at an appropriate position in consideration of operability and maintainability.

  On the other hand, one end of an air release pipe Lb is connected to the upper end of the drain tank 2 separately from the pressure equalizing pipe La. The other end of the air release pipe Lb is opened to an atmospheric pressure system outside the drainage equipment system. Further, an air release valve Vb is provided in the middle of the air release pipe Lb. By opening and closing the air release valve Vb, the drain tank 2 communicates with the gas phase portion and the air system, and the inside of the drain tank 2 The position of the sealing liquid level is adjusted. If the atmospheric pressure release valve Vb is opened while the pressure equalization pipe Va of the pressure equalization pipe La is closed, the drain water (sealed water) in the drain tank is hardly affected without substantially affecting the pressure in the gas phase portion of the casing 1. The liquid level position can be lowered. In addition, when the drain pipe opening / closing valve V1 is opened, the gas flows from the atmospheric system into the casing 1 through the drain tank gas phase portion Dg. The drain water from the casing 1 to the drain tank 2 in the state where the drain water is being discharged from the casing 1 through the drain drain pipe L2, that is, the drain drain port 20 of the drain tank 2 is closed with the drain water being discharged. It has the effect of helping transport.

  The above-described opening / closing operation of the pressure equalizing valve Va and the atmospheric release valve Vb and the adjustment of the opening / closing state can be automatically controlled by a known valve control mechanism using a computer or the like in addition to being manually performed by a person.

  Although not provided in the illustrated equipment, a liquid level gauge for measuring the level of drain water or seal water is provided in the casing 1 and / or the drain tank 2 and is measured by the liquid level gauge. Each valve may be configured to be manually operated or automatically operated based on the liquid level position.

( First form )
FIG. 2 shows the drainage facility X2 according to the first embodiment of the present invention. In the drain drainage facility X2 , the drain drain pipe L2 in the comparative example of FIG. 1 extends to the vicinity of the bottom in the drain funnel 3, and the tip of the drainage trap facility 30 installed in the drain funnel 3 is It is a form sealed with water. Other configurations are the same as those of the drainage drainage facility X1 of the comparative example shown in FIG.

  In the drain drainage facility X2 that seals the drain drain pipe tip in the drain funnel 3, even if the pressure equalizing pipe La is opened, only the gas phase portion in the casing 1 and the gas phase portion in the drain tank 2 communicate with each other. There is no communication with the external gas phase part through the drain funnel 3 inside.

  Therefore, when the pressure equalizing valve La is released, the drain water in the casing 1 is drained only by the difference between the atmospheric pressure in the drain tank 2 and the atmospheric pressure in the casing 1 without being affected by the atmospheric pressure of the external system via the drain funnel 3. 2 can be transferred. Further, even when these valves are operated, the water sealing state is reliably maintained because the tip of the drain drain pipe L2 is sealed with the water sealing trap facility 30 in the drain funnel 3.

( Second form )
FIG. 3 shows a second embodiment of the present invention. According to the second embodiment, in the drain drainage facility X1 according to the comparative example , drainage in the drain drain pipe L2 that opens in the drain tank 2 according to the liquid level position of drain water (sealed water) in the drain tank 1. A drain drain opening / closing means 21 for opening / closing the opening 20 is provided.

  The drain drain opening / closing means 21 in the illustrated example is a general ball valve 21 including a lid portion 21 a for opening and closing the drain port 20 and a floating ball portion 21 b, and drain water (sealed water) accumulated in the drain tank 2. The lid 21a is configured to open when the floating ball 21b rises as the amount increases. The drain outlet opening / closing means 20 is not limited to the ball valve in the illustrated example, and a mechanism having the same function and effect can be used.

By providing the ball valve in this way, the drain tank 2 is not affected by the atmospheric pressure of the external system via the drain funnel 3 when the pressure equalizing valve La is released, like the drain drainage equipment X2 of the first embodiment. The drain water in the casing 1 can be transferred into the drain tank 2 only by the difference between the atmospheric pressure in the casing 1 and the atmospheric pressure in the casing 1. If the lid 21a is opened before the drain water in the drain tank 2 completely blocks the drain port 20, the drain gas phase portion Dg, the drain drain pipe L102, and the drain funnel 3 are connected to the external gas phase portion. There is an increased risk of communication with the inside of the casing. If the inside of the casing 1 and the external gas phase portion communicate with each other, the temperature or the atmospheric pressure in the casing 1 is not significantly affected. Therefore, in order to prevent this, it is desirable to adjust the ball valve 21 so that the lid 21a is opened only when the drain port 20 is completely closed with drain water.

( Third form )
FIG. 4 shows a drainage facility according to the third embodiment of the present invention. In this third drainage drainage system X4, the drain tank 2 is not water-sealed, but in the middle of the drain pipe L1 that continues from the casing 1 to the drain tank 2 and in the middle of the drain drain pipe L2 that continues from the drain tank 2 to the drain funnel 3. It is a drainage drainage facility provided with opening and closing valves V1 and V2, respectively. The trapping and discharging of drain water is operated by opening and closing these open / close valves. In addition, a level gauge M for measuring the level of the drain water is installed in the drain tank. As the liquid level gauge M, a general liquid level gauge including a floating ball and a measure for measuring the position of the floating ball that rises as the liquid level rises in the drain water can be used. Liquid level gauges of other configurations can be used.

On the other hand, in the third drainage facility X4 as well as the drainage drainage facility of the comparative example shown in FIG. 1, the pressure equalizing pipe L1 communicating with the drain tank 2 and the casing 1 and the pressure equalizing provided in the middle of the pressure equalizing pipe L1. A valve La is provided. Furthermore, an atmosphere release pipe Lb and an atmosphere release valve Vb are also provided. Since these configurations are the same as those in the comparative example , description thereof is omitted.

  The installation positions of the on-off valves V1 and V2 of the drain pipe L1 and the drain drain pipe L2 are not particularly limited and can be installed at appropriate positions that are easy to control or control.

  Here, the drainage mechanism by the operation of each valve in the facility X4 of this embodiment will be described in detail. When the drain valve is opened in the state where the drain valve open / close valve is closed, the drain drain in the casing is directed to the drain tank. In this state, since the drain tank is sealed, the transition hardly proceeds.

  Here, when the pressure equalizing valve is released, since the casing internal pressure is lower than the drain tank internal pressure, the drain water in the casing is transferred to the drain tank. When the drain water level reaches higher than the drain outlet position in the drain tank due to the transfer of drain water to the drain tank, the drain valve open / close valve and pressure equalization valve are closed, and the drain drain The open / close valve V2 and the air release valve Vb of the pipe L2 are opened so that drain water is drained into the drain funnel 3. This operation is repeated when the drain water Dw accumulated in the casing 1 is large. Even when the height of the sealed water cannot be ensured by this operation, the drain water is not discharged into the drain funnel 3 on the same floor without accumulating drain water in the casing and maintaining airtightness with the external gas phase portion in the casing. can do.

As with the drainage drainage facility X1 according to the comparative example , each valve V1, V2, Va, Vb is manually operated by a person, and each valve V1, V2, Va, Vb is operated by computer control. Can do. In particular, in the present equipment X4, since the liquid level gauge M is provided in the drain tank 2, the opening / closing operation of each valve and the opening / closing condition can be adjusted based on the measured value of the liquid level gauge. It is desirable to use a computer controlled configuration. Furthermore, a level gauge for measuring the amount of drain water stored in the casing 1 may be installed in the casing 1 together with or in place of the drain tank 2, and based on this, each valve operation V1, V2, Va, Vb Can also be configured.

  As is clear from the detailed description of the above embodiments, according to the drainage facility of the present invention, even if the drain funnel on the same floor is used when the drainage pipe is installed at a high position from the floor, It becomes possible to drain the drain water. Therefore, it is not necessary to use the drain funnel on the lower floor, which is extremely useful particularly from the viewpoint of facility construction.

  The present invention is suitable as drain water drainage equipment for large-scale air conditioning equipment used in nuclear power facilities and the like, but can also be used for general air conditioning equipment or small air conditioning equipment that requires a drain water drainage mechanism. It is.

It is the schematic of the drainage equipment concerning a comparative example . It is the schematic of the drain drainage equipment concerning a 1st embodiment . It is the schematic of the drainage equipment concerning 2nd Embodiment . It is the schematic of the drainage equipment concerning 3rd Embodiment . It is the schematic of the conventional drain drainage facility. It is the schematic of the conventional drain drainage system in case sealing water height cannot be ensured.

  DESCRIPTION OF SYMBOLS 1,101 ... Casing of air-conditioning equipment, 2,102 ... Drain tank, 3,103 ... Drain funnel, Cg ... Gas phase part in casing, Dg ... Gas phase part in drain tank, Dw ... Drain water in casing, Sw ... Sealed water, G: Floor, Gm: Floor surface, H1: Drain pipe mounting position height, H2: Sealed water height, Sb: Sealed water height reference bottom surface, L1, L101 ... Drain pipe, L2, L102 ... Drain drain pipe, La ... pressure equalizing pipe, Lb ... open air pipe, V1 ... drain pipe open / close valve, V2 ... drain drain pipe open / close valve, Va ... pressure equalizing valve, Vb ... air open valve, B ... ball valve, M ... liquid level gauge, X1, X2, X3, X100 ... Drain drainage equipment.

Claims (5)

A drain drainage system that drains drain water in a casing of an air conditioner to a drain funnel through a drain tank,
The inside of the casing is made negative pressure and the drain tank has a sealed structure,
The drain tank and the drain funnel are arranged on the same floor,
The drain tank is a water-sealed drain tank that seals the drain pipe from the casing; and
A pressure equalizing pipe connected to the casing and the water-sealed drain tank, and a pressure equalizing valve for opening and closing the pressure equalizing pipe ,
A drain drainage system characterized in that a drain drain pipe extending from the drain tank to the drain funnel is extended into the drain funnel, and the drain drain pipe tip is sealed with a water seal trap disposed in the drain funnel. . A drain drainage system that drains drain water in a casing of an air conditioner to a drain funnel through a drain tank,
The inside of the casing is made negative pressure and the drain tank has a sealed structure,
The drain tank and the drain funnel are arranged on the same floor,
An open / close valve is provided in the middle of each drain pipe from the casing to the drain pipe and the drain drain pipe from the drain tank to the drain funnel.
A drain drainage system comprising: a pressure equalizing pipe connected to the casing and the drain tank; and a pressure equalizing valve for opening and closing the pressure equalizing pipe.   The drain tank is provided with an atmosphere release pipe and an atmosphere release valve that opens and closes the pipe line, and is configured such that the pressure in the air layer in the drain tank is adjusted by opening and closing the atmosphere release valve. Item 3. The drainage facility according to item 1 or 2. 4. A drain drain opening / closing means for opening / closing a drain outlet of a drain drain pipe communicating from a water-sealed drain tank to a drain funnel according to a liquid level position in the drain tank. Drainage. The drainage system according to any one of claims 1 to 4 , wherein a liquid level gauge for measuring the liquid level height in the drain tank is provided .

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