JP2008235518A - Liquid resistor cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid resistor cooling device in which even if the liquid (electrolyte) of a liquid resistor is mixed with cooling liquid (cooling water) in a heat exchanger, the cooling liquid with which the liquid is mixed is prevented from being distributed. <P>SOLUTION: The device includes an electrolyte circulating pump 40, a first plate type heat exchanger 41, a first cooling water circulating pump 42, a cooling liquid tank 43 for reserving tap water (first cooling water), a second cooling water circulating pump 44, a second plate type heat exchanger 45, and a third cooling water circulating pump 46. The electrolyte of a liquid resistor 31 is not cooled directly by purified water (second cooling water) of a purified water reservoir 80 but cooled indirectly via tap water (first cooling water) of the cooling water tank 43 provided between the first plate type heat exchanger 41 and the second plate type heat exchanger 45. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a liquid resistor cooling device for cooling a liquid of a liquid resistor to suppress a temperature rise of the liquid.

  When using a liquid resistor for applications such as controlling the speed of a wound-type motor, the electrolyte of the liquid resistor will be in a continuous energization state, so the temperature will continue to rise unless special measures are taken. .

  Therefore, when a liquid resistor is used for such an application, a heat exchanger for suppressing the temperature rise of the electrolytic solution is required. In this case, at present, the mainstream is to provide a plate heat exchanger separately from the liquid resistor.

  FIG. 3 shows the configuration of the plate heat exchanger. As shown in the figure, the plate heat exchanger 1 has an electrolyte inlet 2 and an external cooling water outlet 3 at the top, and has an electrolyte outlet 4 and an external cooling water inlet 5 at the bottom. Although not shown in the drawings, the internal structure of the plate heat exchanger 1 is such that a plurality of plates (metal heat transfer plates) are overlapped with each other with a sealant such as a packing or gasket interposed therebetween. Is formed, and these gaps are alternately formed into an electrolyte solution channel and a cooling water channel. In the plate heat exchanger 1 having such a structure, depending on the use environment, external cooling water of about several hundred liters per minute is required to cool the electrolytic solution.

  FIG. 4 shows the configuration of a conventional liquid resistor cooling device using a plate heat exchanger, and FIG. 5 shows the configuration of another conventional liquid resistor cooling device using a plate heat exchanger. As shown in FIGS. 4 and 5, the liquid resistor 11 has an operation mechanism 12 at the top and an electrolyte tank 13 at the bottom. Although illustration is omitted, an electrolytic solution is stored in the electrolytic solution tank 13, and electrodes are provided in the electrolytic solution.

  In the liquid resistor cooling device shown in FIG. 4, the electrolyte inlet 2 of the plate heat exchanger 1 is connected to the electrolyte outlet 14 provided in the upper part of the electrolyte tank 13 via the pipe 16. In addition, the electrolyte outlet 14 of the plate heat exchanger 1 is connected to the electrolyte inlet 14 provided at the lower part of the electrolyte tank via another pipe 17. The pipe 16 is provided with a liquid circulation pump 18. Therefore, as indicated by a dotted line A in FIG. 4, the electrolytic solution in the electrolytic solution tank 13 is circulated between the electrolytic solution tank 13 and the plate heat exchanger 1 by the liquid circulation pump 18.

  Meanwhile, a cooling water supply pipe (not shown) is connected to the external cooling water inlet 5 of the plate heat exchanger 1, and a cooling water discharge pipe is connected to the external cooling water outlet 3 of the plate heat exchanger 1. (Not shown) is connected. Therefore, as indicated by a dotted line B in FIG. 4, the external cooling water is supplied into the plate heat exchanger 1 from the external cooling water inlet 5, flows through the cooling water flow path, and then flows from the external cooling water outlet 3 to the plate heat. It is discharged out of the exchanger 1.

  However, in this liquid resistor cooling device, the cooling water is merely discharged from the external cooling water outlet 3 (the flow is kept flowing), so that the cooling water is discarded unless some measures are taken. For this reason, there is no particular problem in an environment where seawater or river water can be used as cooling water, but such so-called free water cannot be used and charged water such as tap water must be used as cooling water. In such an environment, hundreds of liters of tap water per minute is wasted as described above.

  Such waste of cooling water can be solved by taking measures such as using equipment capable of circulating cooling water such as a cooling tower. However, in this case, new problems such as securing a place for installing a device such as a cooling tower and exhaust heat occur.

  Therefore, as a liquid resistor cooling device that does not require equipment such as a cooling tower, a liquid resistor cooling device of the type shown in FIG. 5 may be employed, for example. That is, when the electric motor to which the liquid resistor is applied is an intake pump electric motor for a water purification plant, the purified water (tap water) of the water purification tank 21 may be used as cooling water as shown in FIG.

  In the liquid resistor cooling device shown in FIG. 5, one end of a pipe (not shown) is connected to the external cooling water inlet 5 of the plate heat exchanger 1, and the other is also connected to the external cooling water outlet 3 of the plate heat exchanger 1. One end of a pipe (not shown) is connected. And the other end side of these piping is provided in the water purification pond 21 of a water purification plant.

  Therefore, in this liquid resistor cooling device, the purified water (tap water) stored in the purified water pond 21 is shown by a dotted line C in FIG. 5 by a cooling water circulation pump (not shown) provided in the pipe. By circulating between the clean water reservoir 21 and the plate heat exchanger 1, it is used as cooling water. In addition, about the other structure of this liquid resistor cooling device, it is the same as that of the liquid resistor cooling device of FIG. In this liquid resistor cooling device, since the purified water (tap water) in the water purification pond 21 is circulated and used as cooling water, the cooling water is not wasted, and problems such as securing the installation place of equipment such as a cooling tower and exhaust heat Nor.

JP 2000-235906 A Japanese Patent Laid-Open No. 11-074103

  However, in the liquid resistor cooling device of FIG. 5, it is conceivable that the plate-type heat exchanger 1 has a problem that the electrolyte is mixed with the cooling water (tap water). That is, in the internal structure of the plate heat exchanger 1, the electrolyte and cooling water are not usually mixed, but in the unlikely event that the plate is damaged or the seal material between the plates is deteriorated, the electrolyte channel side is changed to the coolant channel side. When the electrolyte solution leaks, the electrolyte solution is mixed with the cooling water (tap water). In this case, it is conceivable that an electrolytic solution containing a heavy metal although being in a trace amount is distributed together with tap water.

  Therefore, in the present invention, even if the liquid (electrolytic solution) of the liquid resistor is mixed with the cooling liquid (cooling water) in the heat exchanger, the cooling liquid mixed with this liquid is distributed. It is an object of the present invention to provide a liquid resistor cooling device capable of preventing the above.

The liquid resistor cooling device of the first invention that solves the above problem is a liquid resistor cooling device for cooling the liquid of the liquid resistor,
A liquid circulation pump, a first heat exchanger, a first coolant circulation pump, a coolant tank in which the first coolant is stored, a second coolant circulation pump, and a second heat exchange And
In the liquid circulation pump, the liquid of the liquid resistor is circulated between the liquid resistor and the first heat exchanger,
In the first coolant circulation pump, the first coolant is circulated between the first heat exchanger and the coolant tank,
In the second coolant circulation pump, the first coolant is circulated between the coolant tank and the second heat exchanger,
The first heat exchanger performs heat exchange between the liquid of the liquid resistor circulated by the liquid circulation pump and the first coolant circulated by the first coolant circulation pump. Cool the liquid resistor liquid,
In the second heat exchanger, heat exchange between the first coolant circulated by the second coolant circulation pump and the second coolant supplied to the second heat exchanger is performed. And performing the cooling of the first coolant.

The liquid resistor cooling device of the second invention is the liquid resistor cooling device of the first invention.
Having a third coolant circulation pump;
The second coolant is configured to circulate between the second heat exchanger and a coolant reservoir in which the second coolant is stored by the third coolant circulation pump. It is characterized by.

The liquid resistor cooling device of the third invention is the liquid resistor cooling device of the first or second invention,
The first cooling liquid and the second cooling liquid are the same type.

Moreover, the liquid resistor cooling device of the fourth invention is the liquid resistor cooling device of any of the first to third inventions,
A mixing detection sensor for detecting mixing of the liquid in the liquid resistor and the first cooling liquid is provided in the cooling liquid tank.

  According to the liquid resistor cooling device pipe of the first invention, a liquid circulation pump, a first heat exchanger, a first cooling liquid circulation pump, a cooling liquid tank storing a first cooling liquid, A second coolant circulation pump; and a second heat exchanger, wherein the liquid circulation pump circulates the liquid resistor liquid between the liquid resistor and the first heat exchanger. In the first coolant circulation pump, the first coolant is circulated between the first heat exchanger and the coolant tank, and in the second coolant circulation pump, the coolant is circulated. The first coolant is circulated between a tank and the second heat exchanger, and in the first heat exchanger, the liquid resistor liquid circulated by the liquid circulation pump, Heat exchange with the first coolant circulated by one coolant circulation pump, and the liquid resistor The liquid is cooled, and in the second heat exchanger, the first cooling liquid circulated by the second cooling liquid circulation pump and the second cooling liquid supplied to the second heat exchanger The first coolant is cooled to cool the first coolant, so that the liquid in the liquid resistor is not directly cooled by the second coolant, Since the cooling is indirectly performed through the first cooling liquid in the cooling liquid tank provided between the heat exchanger and the second heat exchanger, the liquid may be damaged due to a failure or deterioration in the first heat exchanger. Even if the liquid in the resistor leaks, the leaked liquid is only mixed in the first cooling liquid and not in the second cooling liquid. Therefore, for example, even if tap water is used as the second cooling liquid, there is no possibility that the liquid is mixed with the tap water.

  Moreover, according to the liquid resistor cooling device of the second aspect of the invention, a third coolant circulation pump is provided, and the second coolant is converted into the second heat exchange by the third coolant circulation pump. The second cooling water is not wasted and the installation place of the equipment such as a cooling tower is provided, because the second cooling water is not wasted because it is configured to circulate between the cooler and the cooling liquid storage part in which the second cooling liquid is stored. Even if the liquid in the liquid resistor leaks due to problems such as damage or deterioration in the first heat exchanger, the leaked liquid is mixed with the second coolant. There is nothing. In particular, if there is no support even if the first coolant is mixed with the second coolant, for example, the coolant reservoir is a water purification pond of a water purification plant, and the purified water (tap water) of this water purification pond is used. Even when used as the second coolant, the tap water can be used safely and without waste.

  Moreover, according to the liquid resistor cooling device of the third invention, the first coolant and the second coolant are of the same type, so that in the unlikely event of damage in the second heat exchanger Even if the first cooling liquid leaks and is mixed with the second cooling liquid due to problems such as deterioration or deterioration, there is no possibility of changing the quality of the second cooling liquid. Therefore, for example, tap water can be safely used as the second coolant.

  According to the liquid resistor cooling device of the fourth aspect of the invention, the cooling tank is provided with a mixing detection sensor for detecting the mixing of the liquid in the liquid resistor and the first cooling liquid. Therefore, even if the liquid in the liquid resistor leaks and mixes with the first cooling liquid due to problems such as breakage or deterioration in the first heat exchanger, the mixing detection sensor detects these mixing, You can know the leakage of liquid.

  Embodiments of the present invention will be described below in detail with reference to the drawings.

  FIG. 1 is a configuration diagram (front view) of a liquid resistor cooling device according to an embodiment of the present invention, and FIG. 2 is a view in the direction of arrow D (top view) of FIG.

  The liquid resistor cooling device shown in FIGS. 1 and 2 is an example in the case where the liquid resistor 31 is applied to speed control of a winding type electric motor for a water intake pump in a water purification plant.

  As shown in FIGS. 1 and 2, the liquid resistor 31 has an operation mechanism 32 in the upper part and an electrolyte tank 33 in the lower part. Although illustration is omitted, an electrolytic solution is stored in the electrolytic solution tank 13, and electrodes are provided in the electrolytic solution. Further, an electrolytic solution outlet 34, a liquid injection outlet 35 for injecting the electrolytic solution into the electrolytic solution tank 33, a liquid level gauge 36, and a dial thermometer 37 are provided at the upper part of the electrolytic solution tank 33. An electrolyte inlet 38 and a waste liquid valve 39 are provided below 33. The liquid level gauge 36 is for measuring the liquid level of the electrolytic solution in the electrolytic solution tank 33 and managing whether or not the specified liquid level is secured. When the amount of the electrolytic solution in the electrolytic solution tank 33 decreases, the electrolytic solution is injected into the electrolytic solution tank 33 from the liquid injection exhaust port 35 and supplemented.

  The liquid resistor cooling device according to the present embodiment includes an electrolyte circulation pump 40 (liquid circulation pump), a first plate heat exchanger 41 (first heat exchanger), and a first cooling. Water circulation pump 42 (first cooling liquid circulation pump), cooling water tank 43 (cooling liquid tank), second cooling water circulation pump 44 (second cooling liquid circulation pump), and second plate type heat exchange And a third cooling water circulation pump 46 (third cooling liquid circulation pump).

  The first plate heat exchanger 41 has the same configuration as the plate heat exchanger 1 shown in FIG. That is, the first plate heat exchanger 41 has an electrolyte inlet 71 and a first cooling water outlet 72 in the upper part, and has an electrolyte outlet 73 and a first cooling water inlet 74 in the lower part. Although not shown in the drawings, the internal structure of the first plate heat exchanger 41 is such that a plurality of plates (metal heat transfer plates) are overlapped with a sealing material such as a packing or gasket interposed therebetween. There are gaps formed between them, and these gaps are alternately an electrolyte flow path and a first cooling water flow path.

  The electrolyte inlet 71 of the first plate heat exchanger 41 is connected to the electrolyte outlet 34 of the electrolyte tank 33 via a pipe 47, and the electrolyte outlet 73 of the first plate heat exchanger 41 is It is connected to the electrolyte inlet 38 of the electrolyte tank 33 via another pipe 48. The piping 47 is provided with a liquid circulation pump 40 and a gate valve 81. Therefore, as indicated by a dotted line E in FIG. 1, the electrolytic solution in the electrolytic solution tank 33 is circulated between the electrolytic solution tank 13 and the first plate heat exchanger 41 by the liquid circulation pump 40. At this time, in the first plate heat exchanger 41, the electrolyte flows into the plate heat exchanger 41 from the electrolyte inlet 71, flows through the electrolyte flow path, and then flows out of the electrolyte outlet 73.

  Inside the cooling water tank 43, tap water as a first cooling liquid (first cooling water) is stored. A cooling water tank 43 is provided with a first cooling water inlet 51, a first cooling water inlet 56, a water injection outlet 53 for injecting tap water into the cooling water tank 43, a water level gauge 54, and a dial thermometer 55. A first cooling water outlet 52, a first cooling water outlet 57, and a waste water valve 62 are provided at the lower part of the cooling water tank 43. It is not necessary to replace the tap water in the cooling water tank 43 once it is injected from the water injection / exhaust port 53, and it is only necessary to measure whether or not the specified water level is secured by measuring the water level of the tap water with the water level gauge 54. . When the amount of water in the cooling water tank 43 decreases, tap water is injected into the cooling water tank 43 from the water injection exhaust port 53 and replenished.

  The cooling water tank 43 is provided with an ion concentration meter 63 as a mixing detection sensor. The ion concentration meter 63 detects the ion concentration in the tap water in the cooling water tank 43.

  The cooling water tank 43 in the illustrated example uses an electrolyte tank of a liquid resistor (excluding the electrode and the upper operation mechanism), but of course, the invention is not limited to this, and other tanks are cooled. The water tank 43 may be used.

  The first cooling water outlet 72 of the first plate heat exchanger 41 and the first cooling water inlet 51 of the cooling water tank 43 are connected via a pipe 49, and the first plate heat exchanger 41 The first cooling water inlet 74 and the first cooling water outlet 52 of the cooling water tank 43 are connected via another pipe 50. The piping 49 is provided with a first cooling water circulation pump 42, and the piping 50 is provided with a gate valve 79. Accordingly, as shown by the dotted line F in FIG. 1, the tap water (first cooling water) in the cooling water tank 43 is fed by the first cooling water circulation pump 42 to the first plate heat exchanger 41 and the cooling water tank 43. Circulate between. At this time, in the first plate heat exchanger 41, tap water (first cooling water) flows into the plate heat exchanger 41 from the first cooling water inlet 74 and flows through the first cooling water flow path. Then, it flows out from the first cooling water outlet 72.

  In the first plate heat exchanger 41, heat exchange between the electrolyte circulated by the electrolyte circulation pump 40 and tap water (first cooling water) circulated by the first cooling water circulation pump 42 is performed. To cool the electrolyte solution.

  The second plate heat exchanger 45 has the same configuration as the plate heat exchanger 1 shown in FIG. That is, the second plate heat exchanger 45 has a first cooling water outlet 75 and a second cooling water outlet 76 in the upper part, and has a first cooling water inlet 77 and a second cooling water inlet 78 in the lower part. Yes. Although not shown, the internal structure of the first plate heat exchanger 45 is such that each plate is formed by stacking a plurality of plates (metal heat transfer plates) with a sealant such as a packing or gasket interposed therebetween. Gaps are formed between them, and these gaps are alternately formed into a first cooling water channel and a second cooling water channel.

  The first cooling water inlet 56 of the cooling water tank 43 and the first cooling water outlet 75 of the second plate heat exchanger 45 are connected via a pipe 58, and the first cooling water outlet 57 of the cooling water tank 43 and the first cooling water outlet 57 are connected to each other. The first cooling water inlet 59 of the two plate heat exchangers 45 is connected via another pipe 59. The pipe 58 is provided with a second cooling water circulation pump 44 and a gate valve 82. Accordingly, the tap water (first cooling water) in the cooling water tank 43 is supplied from the cooling water tank 43 and the second plate heat exchanger 45 by the second cooling water circulation pump 44 as indicated by a dotted line G in FIG. Circulate between. At this time, in the second plate heat exchanger 45, tap water (first cooling water) flows into the plate heat exchanger 45 from the first cooling water inlet 77 and flows through the first cooling water flow path. Then, it flows out from the first cooling water outlet 75.

  One end side of the pipe 61 is connected to the second cooling water inlet 78 of the second plate heat exchanger 45, and another pipe 60 is connected to the second cooling water outlet 76 of the second plate heat exchanger 45. Is connected. The other end sides of these pipes 60 and 61 are provided in the water purification pond 80 of the water purification plant. The piping 61 is provided with a third cooling water circulation pump 46. Therefore, the purified water (tap water) stored in the purified water reservoir 80 is converted into the purified water reservoir 80 and the second plate heat exchanger 45 by the third cooling water circulation pump 46 as shown by the dotted line H in FIG. , And is used as second cooling water (second cooling liquid).

  As described above, according to the liquid resistor cooling device of the present embodiment, the electrolyte circulation pump 40, the first plate heat exchanger 41, the first cooling water circulation pump 42, the tap water ( A first cooling water tank 43, a second cooling water circulation pump 44, and a second plate heat exchanger 45. In the electrolyte circulation pump 40, the liquid resistor 31 is provided. Between the first plate heat exchanger 41 and the first plate heat exchanger 41, and the first cooling water circulation pump 42 circulates the electrolytic solution of the liquid resistor 31 between the first plate heat exchanger 41 and the cooling water tank 43. The tap water (first cooling water) is circulated between them, and the second cooling water circulation pump 44 circulates the tap water (first cooling water) between the cooling water tank 43 and the second plate heat exchanger 45. In the first plate heat exchanger 41, the electrolyte circulation pump Heat exchange is performed between the electrolytic solution of the liquid resistor 31 circulated at 40 and the tap water (first cooling water) circulated by the first cooling water circulation pump 42, and the electrolytic solution of the liquid resistor 31 is changed. In the second plate heat exchanger 45, the tap water (first cooling water) circulated by the second cooling water circulation pump 44 and the purified water supplied to the second plate heat exchanger 45 are cooled. Since the heat exchange with the tap water (second cooling water) of the pond 80 is performed to cool the tap water (first cooling water), the electrolytic solution of the liquid resistor 31 The cooling water tank 43 provided between the first plate heat exchanger 41 and the second plate heat exchanger 45 is not directly cooled with the purified water (second cooling water) of the water purification tank 80. In the unlikely event that it is indirectly cooled via the tap water (first cooling water), the first plate heat exchanger Even if the electrolyte solution of the liquid resistor 31 leaks due to damage to the plate of the vessel 41 or deterioration of the sealing material, the leaked electrolyte solution is only mixed with the tap water (first cooling water) in the cooling water tank 43. The water is not mixed with the purified water (second cooling water) of the water purification pond 80. Therefore, there is no fear that the electrolyte solution is mixed with the purified water (tap water) of the water purification tank 80.

  In addition, according to the liquid resistor cooling device of the present embodiment, the third cooling water circulation pump 46 is provided, and the purified water (second cooling water) of the water purification tank 80 is supplied by the third cooling water circulation pump 46. Since it is configured to circulate between the second plate heat exchanger 45 and the purified water reservoir 80 (coolant reservoir), the purified water (second cooled water) of the purified water reservoir 80 is wasted. In addition, there is no problem of securing the installation place of equipment such as a cooling tower or exhaust heat. Moreover, even if the electrolyte of the liquid resistor 31 leaks due to damage to the plate of the first plate heat exchanger 41 or deterioration of the sealing material, the leaked liquid will not be mixed with the second coolant. Therefore, the clean water (tap water) of the clean water pond 80 can be used without waste and safely.

  Further, according to the liquid resistor cooling device of the present embodiment, the first cooling water and the second cooling water are of the same type (that is, the same tap water). Even if the first cooling water leaks and mixes with the second cooling water due to damage to the plate of the plate heat exchanger 45 or deterioration of the sealing material, there is no particular support and the quality of the second cooling water is changed. There is no fear of it. Therefore, the clean water (tap water) of the clean water reservoir 80 can be safely used as the second coolant.

  In addition, according to the liquid resistor cooling device of the present embodiment, the ion concentration meter 63 for detecting the mixing of the electrolytic solution of the liquid resistor 31 and the first cooling water is provided in the cooling water tank 43. Therefore, even if the electrolyte of the liquid resistor 31 leaks and mixes with the first cooling water due to damage to the plate of the first plate heat exchanger 41 or deterioration of the sealing material, the mixing of these Is detected by the ion concentration meter 63, so that leakage of the electrolytic solution can be known. In addition, when there is only one plate heat exchanger as in the past, even if the ion concentration meter detects the mixing of the electrolyte and purified water (tap water), the tap water mixed with this electrolyte will enter the clean water reservoir. It cannot be prevented from flowing in and distributed. On the other hand, in the case of the present embodiment, the distribution of the purified water (tap water) in the water purification tank 80 is stopped when the ion concentration meter 63 detects the mixing of the electrolyte and the first cooling water. Therefore, the spread of accidents can be surely prevented. However, since the first coolant and the second coolant are the same tap water, the mixing of these is detected to detect the damage of the plate of the second plate heat exchanger 45, the deterioration of the sealing material, or the like. Therefore, the second plate heat exchanger 45 needs to be regularly inspected.

  Here, since the liquid resistor 31 is strongly alkaline, the ion concentration meter is used as the mixing detection sensor. However, the present invention is not limited to this, and the mixture of the liquid resistor and the first cooling liquid is detected. Any sensor that can identify the difference between the two fluids may be used.

  The present invention relates to a liquid resistor cooling device, and is useful when applied to, for example, purified water (tap water) of a water purification pond as cooling water.

It is a block diagram (front view) of the liquid resistor cooling device which concerns on the embodiment of this invention. It is a D direction arrow line view (top view) of FIG. It is a block diagram of a plate type heat exchanger. It is a block diagram of the conventional liquid resistor cooling device using a plate type heat exchanger. It is a block diagram of the other conventional liquid resistor cooling device using a plate type heat exchanger.

Explanation of symbols

31 Liquid resistor 32 Upper operation mechanism 33 Electrolyte tank 34 Electrolyte outlet 35 Injection outlet 36 Liquid level gauge 37 Dial thermometer 38 Electrolyte inlet 39 Waste liquid valve 40 Electrolyte circulation pump 41 First plate heat exchanger 42 1st cooling water circulation pump 43 Cooling water tank 44 2nd cooling water circulation pump 45 2nd plate-type heat exchanger 46 3rd cooling water circulation pump 47, 48, 49, 50 Piping 51 1st cooling water inlet 52 2nd 1 cooling water outlet 53 water injection outlet 54 water level meter 55 dial thermometer 56 first cooling water inlet 57 first cooling water outlet 58, 59, 60, 61 piping 62 waste water valve 63 ion concentration meter 71 electrolyte inlet 72 first cooling Water outlet 73 Electrolyte outlet 74 First cooling water inlet 75 First cooling water outlet 76 Second cooling water outlet 77 First cooling water inlet 78 First Cooling water inlet 79 gate valve 80 water purification pond 81 and 82 gate valve

Claims (4)

A liquid resistor cooling device for cooling a liquid of a liquid resistor, comprising:
A liquid circulation pump, a first heat exchanger, a first coolant circulation pump, a coolant tank in which the first coolant is stored, a second coolant circulation pump, and a second heat exchange And
In the liquid circulation pump, the liquid of the liquid resistor is circulated between the liquid resistor and the first heat exchanger,
In the first coolant circulation pump, the first coolant is circulated between the first heat exchanger and the coolant tank,
In the second coolant circulation pump, the first coolant is circulated between the coolant tank and the second heat exchanger,
The first heat exchanger performs heat exchange between the liquid in the liquid resistor circulated by the liquid circulation pump and the first coolant circulated by the first coolant circulation pump. Cool the liquid resistor liquid,
In the second heat exchanger, heat exchange between the first coolant circulated by the second coolant circulation pump and the second coolant supplied to the second heat exchanger is performed. A liquid resistor cooling device that is configured to cool the first coolant. The liquid resistor cooling device according to claim 1.
Having a third coolant circulation pump;
The second coolant is configured to circulate between the second heat exchanger and a coolant reservoir in which the second coolant is stored by the third coolant circulation pump. A liquid resistor cooling device. The liquid resistor cooling device according to claim 1 or 2,
The liquid resistor cooling device, wherein the first coolant and the second coolant are of the same type. In the liquid resistor cooling device according to any one of claims 1 to 3,
The liquid resistor cooling apparatus according to claim 1, wherein a mixing detection sensor for detecting mixing of the liquid in the liquid resistor and the first cooling liquid is provided in the cooling liquid tank.

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