JPS5924774B2 - Cooling water saving device for load body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling water saving device for directly supplying well water or city water as cooling water to a water-cooled refrigerator, etc. in a building where a cooling tower cannot be installed, for example. .

In many cases, well water or city water is directly supplied as cooling water to the chillers installed in each store in a building or underground mall.

At that time, if tap water is directly connected to the refrigerator coil and used as a dripping method, not only will problems occur because the refrigerator coil is not approved by the Waterworks Bureau, but it will also be uncooperative in saving water resources, leading to criticism. I can't escape it.

For this reason, the system tank is installed in a high place such as in the ceiling, and a water-saving valve is attached to the drain pipe from the refrigerator coil, and this water-saving valve is controlled according to the operating status of the refrigerator (refrigerant pressure) to save as much water as possible. Traditionally, methods have been used to achieve this.

However, with this system using a system tank and water saving valve.

If there is insufficient space within the ceiling, the system tank will protrude into the store, reducing the effective area of the room.

Even if the system tank is installed in the ceiling, maintenance becomes difficult, and if the ball tap malfunctions, water leaks and products in the store may be lost.

Also, if the resistance of the refrigerator coil is large. The necessary water head cannot be obtained at the height within the ceiling, causing problems in operation, and especially in structures such as underground malls, there is a limit to installing the system tank at the required height, so water is supplied using a single-position water head. may not be possible.

The present invention proposes a new water-saving system, which can be called a circulation system, in place of the conventional system tank and water-saving valve system. It was devised.

That is, the cooling water saving device of the present invention is a device for supplying city water or well water to a load body 1 such as a refrigerator or a machine coil, as shown in the layout diagram in FIG. A water receiving tank 2 for receiving city water or well water is installed below water receiving tank 1, and a circulation pump 4 and a check valve 5 are connected to an outgoing pipe line 3 leading from the water receiving tank 2 to the load body 1. Intervention,
A return pipe structure consisting of a falling water pipe 6' and a riser pipe 7 is provided in the selection pipe from the load body 1, and the lowest piping part 8 of this return pipe structure is located below the receiving water high level liquid level in the water receiving tank 2. A drainage pipe line 9 is connected to this piping section 8, and a solenoid valve 11 that is operated in conjunction with a water temperature sensor 10 in the selection pipe is interposed in this drainage pipe 9, and the end of the final falling water pipe 12 of the selection pipe is received. It is characterized in that it communicates with a pipe line 13 leading from the water tank 2 to the circulation pump 4, and that a flow rate control valve 14 is interposed in this final drop pipe 12.

In more detail below, the water receiving tank 2 can be installed on the floor or any other suitable location, and can be installed in the same way as in the conventional system (it does not need to be set higher than the refrigerator installation), and can be used for city water, well water, or industrial water. It is connected to a liquid supply pipe 15 via an inflow meter 16 .

Water is sent from this water receiving tank 2 via a header 17 as the case may be, to a load 1 such as a refrigerator at a high place via an outgoing pipe 3 and a circulation pump 4.

The height H of this load body is approximately 107 cm in one embodiment of the present invention.
It was 7L.

In addition to the circulation pump 4, a check valve 5 and a gate valve 18 are installed on this outgoing pipe 3 to prevent water from falling during periods of rest, and to set an upper limit on the amount of water to be fed.It is also preferable to have a strainer 19 interposed therein. .

The selection pipe from the heat load 1 is the pipe 1 on the upstream side of the circulation pump 4.
3, one feature of the device of the present invention is that a return pipe structure is adopted for this selection pipe, and the solenoid valve 11 and the flow control valve 14 are installed at fixed locations.

That is, the return pipe structure consists of a falling pipe 6 and a riser pipe 7, and this lowermost piping part 8 is located below the receiving water high level of the water receiving tank 2.

Such a return pipe structure facilitates drainage as described below while preventing the cooling water from falling in the circulation path and preventing overblowing from the water receiving tank 2.

Then, a solenoid valve 11 that operates in conjunction with a temperature sensor 10 for detecting the water temperature in the selection pipe is installed in the drain pipe 9 branched from the lower part (piping section 8) of this return pipe structure, and this solenoid valve 1
1, if the cooling water still has cooling capacity after passing through the load body 1, the circulation pump 4 cools the load body 1 until the cooling water loses its cooling capacity (for example, until the temperature reaches 32°C). The structure is such that it circulates between

In other words, when the temperature sensor 10 detects a water temperature at which it has lost its cooling ability, the solenoid valve 11 opens and the drain meter 20
．． Drainage is carried out via the drainage amount control valve 21, but when the water temperature in the selection pipe is in a state where it has cooling capacity, this solenoid valve 1
1 is maintained in the closed position, the return water enters the outgoing pipe line 3 to the load body 1 from the final drop pipe 12 via the flow control valve 14, and is circulated.

In addition, the cooling water in the selection pipe can be discharged as needed.117) Bypass valve 2 that bypasses the solenoid valve i1
It is recommended to set 2.

For example, this bypass valve can be suitably used during startup, inspection and repair, or manual operation.

The flow rate control valve 14 interposed in the final drop pipe 12 is as follows.

This is to adjust so that the inside of the circulation path is always maintained at a positive pressure.It prevents air pockets in the circulation path, and by adjusting the amount of returned water, the amount of cooling water flowing in from the water receiving tank 2 is also adjusted at the same time. It will be possible.

Air that inevitably accumulates in the circulation path is released from the air vent 23.

When performing air bleeding work, close the flow control valve 14,
This can be easily done by appropriately adjusting the bypass valve η.

In addition, as another aspect of the present invention, the position of the flow rate control valve 14 may be lowered as much as possible, and the pipeline structure of the drain pipe 9 may be provided directly above the flow rate control valve 14. In this case as well, substantially The same effects can be obtained.

Furthermore, if the electromagnetic valve 11 is replaced with an electric valve, it is possible to cope with a large capacity, and it can also be applied to water conservation in large equipment when industrial water or industrial liquids are used.

Also, instead of the solenoid valve 11, a wax valve (temperature self-sensing 3
Similar effects can be obtained by interposing a directional valve in the piping section 8, and constant-temperature drainage can be achieved by mechanical control instead of electrical control.

Therefore, in this specification, the electromagnetic valve 11 can be replaced by an electric valve or a wax valve that can perform the same function as the electromagnetic valve 11.

According to the cooling water saving device of the present invention configured as described above, the amount of cooling water used is 1,750 ml compared to the conventional method in which well water or city water was used as cooling water for a refrigerator or the like. Extremely large water savings of up to 1/100 can be achieved.

In addition, compared to the conventional system tank water-saving valve system, there are no problems such as the installation position of the tank being controlled or not being able to obtain the required water head, and even when the coil resistance is large, the demand can be met at any time by selecting the circulation pump head. It can be used appropriately for cooling water conservation purposes in buildings, underground malls, and in some cases, industrial plants, etc., and can achieve a large amount of water conservation purposes.

Also, by installing the header 17, multiple water supplies are possible (by installing a valve in each branch pipe, the operating status of other systems can be completely independent), and system tanks can be installed at various locations. One of the great advantages of the present invention, compared to the conventional example, is that initial costs can be reduced and accidents such as water leakage from the sister tank can be avoided.

[Brief explanation of drawings]

FIG. 1 is a schematic layout diagram showing one embodiment of the cooling water saving device of the present invention. 1... Load body such as a refrigerator, 2... Water receiving tank, 3...
...Outgoing pipe line, 4...Circulation pump, 5...Check valve, 6
... Falling pipe, 7. Rise pipe, 8. Lowermost piping section, 9. Drainage pipe line, 10. Water temperature sensor, 11.
...Solenoid valve, 12...Final drop pipe, 14...
Flow control valve.

Claims (1)

[Claims] 1 A device for supplying city water or well water to a load body 1 such as a refrigerator coil, and a water receiving tank 2 for receiving the city water or well water is installed at a position below the load body 1. death,
A circulation pump 4 and a check valve 5 are interposed in the outgoing pipe line 3 leading from the water receiving tank 2 to the load body 1, and a return pipe structure consisting of a falling pipe 6 and a riser pipe 7 is installed in the selection pipe line from the load body 1. At the same time, the lowest piping part 8 of this return pipe structure is located below the receiving water high level liquid level in the water receiving tank 2,
A drain pipe 9 is connected to this piping section 8, and a solenoid valve 11 is connected to this drain pipe line 9 and is operated in conjunction with a water temperature sensor 10 in the selection pipe line.
The end of the final drop pipe 12 of the selection pipe is connected to the pipe line 13 from the water receiving tank 2 to the circulation pump 4, and the final drop pipe 12 is provided with a flow rate regulating valve 14. Cooling water saving device.