JP2003185321A - Pure water cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a miniaturizable pure water cooling device free from a problem on pulverization of ion exchange resin particles, and capable of reducing the cost. <P>SOLUTION: This pure water cooling device is provided with an ion exchanger 12 mounted in the pure water in a pure water tank 11 accommodating the pure water as a cooling medium, and further comprises a first pure water conduit 17 for returning the pure water discharged from the pure water tank 11 to the pure water tank successively through a cooled device 2 and a heat exchanger 3, and a second pure water conduit 18 for returning the pure water discharged from the pure water tank 11 to the pure water tank 11 without passing through the cooled device 2. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pure water cooling device,
Specifically, it relates to a pure water cooling device using pure water as a cooling medium.

[0002]

2. Description of the Related Art When cooling an electric device such as a thyristor or an inverter, a cooling medium, for example, cooling water is usually brought into direct contact with an electrode to which a voltage is applied. Under such circumstances, if tap water or industrial water is used as cooling water, since a large amount of these conductive materials dissolves in such water, electrical insulation strength is low and a short-circuit accident occurs between the electrodes. Pure water with high electric insulation strength is used. However, even pure water as cooling water comes into contact with an object to be cooled such as the electrode during use, so that the material (mainly copper) constituting the object to be cooled is dissolved, so that the electric insulation strength thereof gradually decreases. . For this reason, pure water is provided with measures to maintain high purity, and is usually subjected to ion exchange treatment.

FIG. 4 is a schematic block diagram of a conventional pure water cooling device, in which 1 is a pure water cooling device, 2 is a cooled device such as a thyristor or an inverter, and 3 is a heat exchanger. The pure water cooling device 1 includes a pure water tank 11 containing pure water PW as a cooling medium, an ion exchange device 12, a pump 13, a valve 14a, a valve 14b, a valve 14c, and a main pure water pipeline 1.
5 and a bypass pure water pipeline 16.
PW is pure water.

Next, the operation of the conventional pure water cooling device will be described. When the pump 14 is operated with the valves 14a, 14b, and 14c opened, the pure water PW in the pure water tank 11 passes through the main pure water pipe 15, the valve 14a, the device to be cooled 2, the heat exchanger. It returns to the pure water tank 11 via 3 sequentially. At this time, part of the pure water PW enters the bypass pure water pipe 16 before the valve 14a, and returns to the pure water tank 11 via the valve 14b, the ion exchange device 12, and the valve 14c in this order. The pure water PW that returns to the pure water tank 11 through the main pure water pipe 15 through the cooled device 2 has the function of cooling the cooled device 2, while passing through the bypass pure water pipe 16 and performing ion exchange. Pure water P returned to the pure water tank 11 via the device 12
Dissolved ions of W are removed by ion exchange.

In the pure water tank 11, the pure water PW that has passed through the above-mentioned two routes is mixed, but the degree of improvement in purity by ion exchange is higher than the degree of contamination of the pure water PW by cooling the device to be cooled 2. Valve 14 to slightly exceed
The purity of the pure water PW in the pure water tank 11 is always above the control lower limit value by adjusting the open state of each of the valve a, the valve 14b, and the valve 14c, or increasing the capacity of the ion exchange device 1. To be maintained.

By the way, in the conventional pure water cooling device, all of the pure water PW flowing through the bypass pure water pipe 16 vigorously passes through the resin-filled cylinder filled with the particles of the ion-exchange resin in the ion-exchange device 12. Therefore, due to the flow of the pure water, the collision of the particles due to the upward movement of the ion-exchange resin particles is intense, which causes the problem that the ion-exchange resin particles are crushed and atomized to leak out from the resin-filled cylinder. . On the other hand, if the deionized water flow rate in the bypass deionized water pipe 16 is reduced in order to reduce the collisions between the ion exchange resin particles, the ion exchange capacity of the ion exchange apparatus 1 will be reduced, and in order to cover this reduction. There is a problem that the capacity of the ion exchange device 1 needs to be increased and the cost of the pure water cooling device becomes high. Furthermore, in the conventional pure water cooling device,
Since the ion exchange device 1 is provided separately from the pure water tank 11, there is a problem that the number of parts such as a pipe body, a valve, or other parts connecting the two parts increases, and it becomes difficult to make the pure water cooling device compact. .

[0007]

DISCLOSURE OF THE INVENTION The present invention aims to solve the above-mentioned problems in the prior art, and there is no problem of making ion-exchange resin particles into fine particles, and it is a pure water which can be made compact at low cost. It is an object to provide a cooling device.

[0008]

A pure water cooling device according to claim 1 of the present invention is a pure water tank for storing pure water as a cooling medium, and an ion exchange resin directly contacts the pure water in the pure water tank. It is characterized in that it is provided with an ion exchange device installed in the pure water tank so as to come into contact therewith.

The pure water cooling device according to claim 2 of the present invention is
The first pure water pipe line according to claim 1, wherein the pure water discharged from the pure water tank is returned to the pure water tank through the cooled device and the heat exchange device in sequence.
It is characterized in that it is provided with a second pure water pipe line which is arranged so that the pure water discharged from the pure water tank returns to the pure water tank without passing through the device to be cooled.

The pure water cooling device according to claim 3 of the present invention comprises:
In the second aspect, the second pure water pipeline is branched from the first pipeline.

The pure water cooling device according to claim 4 of the present invention is
In the above claim 1, a contact means is provided for improving the degree of uniform contact between the pure water returned to the pure water tank and the ion exchange resin.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. 1 and 2 are views for explaining a first embodiment of a pure water cooling device of the present invention, FIG. 1 is a schematic block diagram of the first embodiment, and FIG. 2 is a pure water tank in FIG. 11 is an enlarged sectional view of FIG.

1 and 2, 1 is a pure water cooling device,
Reference numeral 2 is a cooled device such as a thyristor or an inverter, and 3 is a heat exchanger. The pure water cooling device 1 includes a pure water tank 11 that stores pure water PW as a cooling medium, an ion exchange device 1.
2, a pump 13, a valve 14a, a valve 14d, a first pure water pipeline 17, and a second pure water pipeline 18. The ion exchange device 12 has a perforated plate 1 fixed to the inner wall of the pure water tank 11 so as to come into contact with the entire circumference of a part of the inner wall.
21 and an ion exchange layer which is deposited on the perforated plate 121 and includes two layers of a cation exchange resin particle layer and an anion exchange resin particle layer (two layers are not shown in FIG. 2). And a resin layer 122. First pure water line 1
Reference numeral 7 is a closed pipe line that sequentially connects the pure water tank 11, the pump 13, the valve 14a, the device to be cooled 2, and the heat exchanger 3. The second pure water pipe 18 includes the pure water tank 11 and the pump 1.
3, a closed pipe line for sequentially connecting the valve 14d, which is branched from the first pure water pipe line 17 before the valve 14a. Reference numeral 181 is a water disperser provided at the tip of the second pure water pipe 18 extending into the pure water tank 11. Water disperser 1
Reference numeral 81 is composed of a perforated cylindrical tube, and functions as a contact means for improving the degree of uniform contact between the pure water PW returned to the pure water tank 11 and the ion exchange resin in the ion exchange resin layer 122. The arrows in FIGS. 1 and 2 are pure water PW.
(However, the water on the cooling conduit side of the heat exchanger 3 is excluded.).

Next, the operation of the first embodiment will be described. The pure water tank 11 has a height of the pure water PW that is high enough to submerge the ion exchange device 12 and the water disperser 181.
When the pump 13 is operated with the valves 14a and 14d opened, the pure water tank 1
The pure water PW in 1 passes through the first pure water pipe line 17, cools the device to be cooled 2 and is heated, is cooled by the heat exchanger 3 and returns to the pure water tank 11. On the other hand, a part of the pure water PW in the first pure water conduit 17 is in front of the valve 14a and the second pure water conduit 1
8 and returns to the pure water tank 11 via the valve 14d. The return water is radially discharged from the water disperser 181 over the entire circumference thereof, passes through the ion-exchange resin layer 122 having a generally cylindrical shape in a substantially even manner, passes through the ion-exchange treatment, and is again subjected to the second pure treatment. It can be circulated in the water pipe 18.

When the pure water cooling device 1 of the first embodiment is operated for a long time, the temperature and volume resistivity of the pure water PW in the pure water tank 11 are constantly or regularly measured, and The valve 14a and the valve 14d are opened / closed so that is within the lower and upper limits of control. For example, when the device to be cooled 2 is sufficiently cooled and the volume resistivity of the pure water PW drops near the lower limit, the valve 1 is temporarily stopped.
4a is closed or half-opened, and the valve 14d is fully opened to increase the flow rate in the second pure water pipe line 18. On the contrary, when the cooled device 2 is insufficiently cooled and the volume resistivity of the pure water PW is sufficiently large, the valve 14a is fully opened and the valve 14d is temporarily closed or half-opened. It is said that

The amount of the cation exchange resin and the anion exchange resin used in the ion exchange resin layer 122 is determined by the size and structure of the device to be cooled 2 and the opening / closing operation of the valves 14a and 14d. It depends on the flow rates of the pure water PW in the water conduit 17 and the second pure water conduit 18, and if these conditions are set, it can be determined at least by trial and error. If the device to be cooled 2 is of a scale that requires a flow rate of the pure water PW in the first pure water pipe 17 of, for example, about 1000 liters / minute, the flow rate of the second pure water pipe 18 is about 50 liters / minute. The amount of cation exchange resin particles used is about 40 liters, and the amount of anion exchange resin particles used is about 20 liters.

Embodiment 2. FIG. 3 illustrates a second embodiment of the pure water cooling device of the present invention, and is another enlarged cross-sectional view of the pure water tank 11 in FIG. In FIG. 3, 171 is a heat exchanger 3 (not shown).
Of the first pure water pipe 17 returned to the pure water tank 11 from
It is a tip portion whose diameter is expanded like a scoop and upward. The tip portion 171 is the pure water PW returned to the pure water tank 11.
And the ion exchange resin layer 122 functions as a contact means for improving the degree of uniform contact with the ion exchange resin. The second embodiment is different from the first embodiment in that a tip portion 171 is provided, and other configurations are the same.

A tip portion 17 is provided at the above-mentioned location of the first pure water pipe 17.
1 is provided, the pure water PW returned to the pure water tank 11 is discharged toward the perforated plate 121 of the ion exchange device 12, and the released pure water PW has a water pressure of the perforated plate 12.
If the pure water existing between the ion exchange resins is propagated through the holes of No. 1 into the ion exchange resin layer 122 and the propagation water pressure promotes the movement of the pure water or the stagnation of the pure water exists between the ion exchange resins. The stagnation is broken, and the ion exchange between the ion exchange resin and the pure water PW becomes good.

The present invention is not limited to the first and second embodiments described above, but includes various modifications in accordance with the spirit of the present invention. For example, as an ion exchange device in the pure water tank 11, a porous container or bag containing a cation exchange resin on the perforated plate 121 and a porous container containing an anion exchange resin. In other words, the pure water in the pure water tank 11 and the ion exchange resin are in good contact with each other, such as a structure in which a water bag and a bag are installed, and a structure in which both the containers and bags are suspended from the ceiling of the pure water tank 11. Any ion-exchange resin may be installed as described above.

[0020]

The pure water cooling device according to the first aspect of the present invention is such that the pure water tank containing pure water as the cooling medium and the ion exchange resin are in direct contact with the pure water in the pure water tank. Since it is equipped with an ion exchange device installed in the pure water tank, the ion exchange resin particles in the ion exchange device generally have a significantly larger volume than those in the conventional pure water cooling device. Since the flow rate of pure water in the pure water tank is generally not so large, the problem of atomization of ion-exchange resin particles is solved and it is necessary when the atomization occurs. The existing large-capacity ion exchange device becomes unnecessary. Further, since the ion exchange device 1 is provided in the pure water tank 11, there is no need for a pipe body, a valve, or other parts for connecting the two, and there is a great effect that the pure water cooling device can be made compact. .

Further, the pure water discharged from the pure water tank is returned to the pure water tank through the cooled device and the heat exchange device in order, and the pure water pipe is provided. A second pure water pipe is provided so that the pure water discharged from the tank returns to the pure water tank without passing through the device to be cooled, and the second pure water pipe is the first pipe. By branching from the path, the deionized water cooling device can be made more compact.

Further, when the contact means for improving the uniform contact degree between the pure water returned to the pure water tank and the ion exchange resin is provided, the contact between the pure water and the ion exchange resin in the pure water tank is improved. The efficiency of ion exchange is improved.

[Brief description of drawings]

FIG. 1 is a first embodiment of a pure water cooling device of the present invention.
FIG.

FIG. 2 is an enlarged sectional view of a pure water tank 11 in FIG.

FIG. 3 is another enlarged cross-sectional view of the pure water tank 11 in FIG.

FIG. 4 is a schematic block diagram of a conventional pure water cooling device.

[Explanation of symbols]

1 pure water cooling device, 11 pure water tank, 12 ion exchange device, 121 perforated plate, 122 ion exchange resin layer,
13 pumps, 14a valves, 14d valves, 17
First pure water conduit, 18 Second pure water conduit, 121 Perforated plate, 122 Ion exchange resin layer, 2 Cooled device, 3
Heat exchanger.

Claims (4)

[Claims] 1. A pure water tank containing pure water as a cooling medium, and an ion exchange device installed in the pure water tank so that the ion exchange resin directly contacts the pure water in the pure water tank. A pure water cooling device characterized in that 2. A first deionized water pipe line arranged so that the deionized water discharged from the deionized water tank returns to the deionized water tank through a device to be cooled and a heat exchange device in sequence, and the deionized water. 2. The pure water according to claim 1, further comprising a second pure water pipe line arranged so that the pure water discharged from the tank returns to the pure water tank without passing through the device to be cooled. Cooling system. 3. The pure water cooling device according to claim 2, wherein the second pure water pipeline branches from the first pure pipeline. 4. The pure water cooling device according to claim 1, further comprising a contact means for improving the degree of uniform contact between the pure water returned to the pure water tank and the ion exchange resin.