JPH0715353B2 - Hydraulic fluid filling device for heat pipes - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heat pipe hydraulic fluid filling device for filling a hydraulic fluid into a heat pipe.

[Prior Art] Insulated heat pipes are attracting attention for cooling electric parts. For example, a heat pipe using Freon 113 as a working fluid is used in a cooling system of a main controller of an electric railway vehicle. In recent years, a substitute for CFC has been required from the viewpoint of environmental preservation. Freon is used in large quantities because it is used in large quantities, and its bluntness is also high, so the reliability of its operation when used for heat pipes is also high. However, CFC substitutes are often not highly blunt because they are used in small amounts.

The heat pipe is a heat transport pipe that utilizes a phase change of a working fluid from a liquid phase to a vapor phase, and the high degree of bluntness of the working fluid has a high correlation with the high quality.

Further, if impurities are present in the working fluid, they are disliked as causing deterioration of the performance of the heat pipe.

[Problems to be Solved by the Invention] As described above, when a CFC substitute is used as a hydraulic fluid, there is a problem that performance is deteriorated.

Further, in order to increase the dullness of the CFC substitute, a huge and expensive refining device is required, which is not desirable from the viewpoint of cost reduction.

In addition, there is a problem in that the working fluid, including freon, easily contains impurities such as air at the time of filling, which easily causes a decrease in performance at the time of filling.

An object of the present invention is to provide a working fluid filling device for a heat pipe, which is capable of filling working fluid while removing impurities and preventing impurities from entering.

[Means for Solving the Problems] To explain the configuration of the present invention for achieving the above object, the present invention relates to a working fluid filling device for a heat pipe, which fills a heat pipe with working fluid, and is closed to the atmosphere. In the vessel, the working fluid is evaporated while the upper part is condensed and returned to the bottom by repeating the distillation, and an exhaust passage for exhausting unnecessary gas accumulated in the upper part of the interior of the distiller, and An exhaust control valve connected to an exhaust flow path, a vacuum pump connected to a downstream side of the exhaust flow path, a hydraulic fluid extraction flow path for taking out the hydraulic fluid distilled from the distiller, and the hydraulic fluid. A hydraulic fluid take-out control valve and a liquid injection pump connected to the take-out flow path, an accumulator connected to the hydraulic fluid take-out flow path through an accumulator control valve to accumulate the hydraulic fluid, and the accumulator. A heat pipe connection joint that is connected to the humor through a heat pipe control valve, a communication passage that connects the evaporation chamber in the distiller and the accumulator, and a communication control valve connected to the communication passage, A heat pipe vacuum evacuation channel that is connected to a channel between the accumulator control valve and the heat pipe control valve and that evacuates the heat pipe connected to the heat pipe connection joint, and the heat pipe vacuum. A vacuum evacuation control valve connected to the evacuation channel.

[Operation] As described above, the working liquid is evaporated in a container closed to the atmosphere, condensed in the upper part, and returned to the lower part to repeat the distillation, and unnecessary gas accumulated in the upper part of the container is exhausted. If a distiller of the type that is discharged from the passage is used, it is possible to carry out distillation with a small and inexpensive distillation facility without using a huge and expensive purification device.

Further, since the accumulator is interposed between the liquid injection pump and the heat pipe, it is possible to efficiently inject liquid into not only one but also a plurality of heat pipes without touching the air.

In addition, since a communication passage that connects the accumulator and the evaporation chamber in the evaporator is provided, the gas of bubbles generated when injecting liquid into the accumulator can be extracted into the distiller, and the bubbles can be removed without touching the outside air. It can be carried out.

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

FIG. 1 is a system diagram showing an embodiment of a heat pipe hydraulic fluid filling device according to the present invention. As shown in the figure, the heat pipe hydraulic fluid filling apparatus of this embodiment comprises a distiller 1, which contains a hydraulic fluid 3 such as perfluorocarbon in a container 2 having a structure closed to the atmosphere. A heater 4 for accommodating and heating the working fluid 3 is provided on the bottom side of the container 2, and a cooling jacket for condensing vapor in a condensation chamber 2A in the upper part of the container 2 by a refrigerant such as water is provided on the upper part. 5 are provided, and the first and the first are provided above and below the condensing chamber 2A.
Second thermocouples 6 ₁ and 6 ₂ are provided, and a replenishment port 7 for replenishing the working liquid 3 in the evaporation chamber 2B is provided in the container 2 corresponding to the evaporation chamber 2B below the condensation chamber 2A. A hydraulic fluid 3 is provided in the container 2
The structure has a structure in which a level meter 8 for detecting the level is inserted in an airtight manner.

An exhaust passage 9 made of a pipe for exhausting unnecessary gas accumulated in the upper part of the chamber is connected to the upper part of the container 2. An exhaust control valve 10 is connected to the exhaust passage 9. A vacuum pump 11 is connected to the downstream side of the exhaust passage 9.

In the lower part of the container 2, a working liquid takeout flow path 12 including a pipe for taking out the distilled working liquid 3 is provided. A hydraulic fluid takeout control valve 13 and a liquid injection pump 4 are connected to the hydraulic fluid takeout flow path 12. In the hydraulic fluid take-out passage 12, the _first to _n- th accumulators 16 ₁ to 16 n are respectively provided via one of the _first to _n-th accumulator control valves 151 to 15 _n.
6 _n are connected in parallel. Each accumulator 16 ₁ ~ 1
6 _n includes the first to n-th heat pipe control valves 17 _{1 to} 17 _n
One of the _first to _nth flexible hoses 18 ₁ to 18 _n 1
1 through n heat pipe connection joints 19 _{1 through} 19 _n
Are connected. _One of the first to n-th heat pipes 20 _{1 to} 20 _n is connected to each heat pipe connection joint 19 _{1 to} 19 _n . Each heat pipe 20 _1-2
0 _n is one respective support of the first to the heat pipe holder 21 ₁ through 21 _n of the n.

The evaporation chamber 2B in the still 1 and the accumulators 16 _{1 to} 16 _n are connected to each other by a common communication passage 22A made of a pipe and first to nth branch communication passages 22B _{1 to} 22B _n . A communication control valve 23 is connected to the common communication passage 22A. The first to n-th branch communication passages 22B _{1 to} 22B _n include accumulator control valves 15 ₁ to 15 _n and accumulators 16 _{1 to} 16 _{n at the} respective stages.
And are connected respectively.

These first to branch communicating passage 22B ₁ ～22B _n by using a heat pipe of the first to n accumulator 16 ₁ ~ 16 _n and first to n 20 ₁ in to 20 _n of the n vacuuming heat pipe vacuum channel 24 of the common tube, each branch communication passages 22B ₁ ~
Commonly connected to 22B _n . The end of the heat pipe evacuation channel 24 is connected to the evacuation pump 11.
Further, a vacuum evacuation control valve 25 is connected to the heat pipe evacuation channel 24.

Next, the operation of filling the working fluid 3 by using such a heat pipe working fluid filling device to the heat pipe 20 ₁ to 20 _n of the first to n.

The 1st to n-th heat pipe connection joints 19 _{1 to} 19 _n are
Keep connecting heat pipes 20 ₁ to 20 _n of the n.

Further, the valves ₁₀ , 13, 15 ₁ to 15 _n , 17 _{1 to} 17 _n , 23, 25 are initially closed.

In this state, the heater 4 of the distiller 1 is energized to evaporate the working fluid 3 in the container 2 closed to the atmosphere, and the vaporized gas is cooled by the cooling jacket 5 in the upper condensation chamber 2B in the container 2. The working liquid 3 is distilled by repeating the steps of cooling, condensing, returning to the working liquid 3 and dropping it to the lower part in the container 2. When it is time for the impurities in the hydraulic fluid 3 to vaporize, the valve 10
Is opened and the vacuum is drawn by the vacuum pump 11 to exhaust the impurity gas in the upper part of the container 2. When exhausting is completed, valve 10 is closed. By repeating such an operation, the working fluid 3 is distilled.

After the distillation is completed, the valves 25, 17 _{1 to} 17 _n are opened, and the accumulators 16 _{1 to} 16 _n and the heat pipes 20 _{1 to} 20 _n are evacuated by the evacuation pump 11. When the evacuation is completed, the valves 25, 17 _{1 to} 17 _n are closed.

Next, the valve 23 is opened and the accumulators 16 _{1 to} 16 _n
The pressure inside is made equal to the pressure in the evaporation chamber 2B of the container 2.

In this state, leave the valve 23 open and leave the valve 13,15 ₁
Is opened to operate the liquid injection pump 14, and the predetermined amount of the hydraulic liquid 3 is supplied to the first accumulator 16 ₁ by measuring the liquid injection pump 14. When the metering injection of the hydraulic fluid 3 into the first accumulator 16 ₁ is completed, the injection pump 14 is stopped, the first accumulator control valve 15 ₁ is closed, and the second accumulator control valve 15 ₂ is opened. In such a state,
Operate the injection pump 14 and set the second accumulator 16 ₂
A predetermined amount of the hydraulic fluid 3 is injected into the. By repeating such operations, the working fluid 3 is metered and injected up to the nth accumulator 16n, and the nth accumulator control valve 15n is closed.

At the time of such metered liquid injection, the discharge side of the liquid injection pump 14 is connected to the _first to _nth accumulator control valves 151 to 15n and the first to _nth accumulator control valves.
~ The n-th branch communication passages 22B _{1 to} 22Bn and the common communication passage 22A communicate with the evaporation chamber 2B in the distiller 1 so that the pressure is not reduced. Weighing can be done. When the injection side of the liquid injection pump 14 is depressurized to operate the liquid injection pump 14, the discharge pressure is not constant and correct measurement cannot be performed.

Moreover, since the valve 23 is opened to inject the liquid to the first to nth accumulators 16 _{1 to} 16 _n , the gas of bubbles generated at the time of injecting the liquid can be extracted into the distiller 1 and the outside air Bubbling can be performed without touching.

Next, after closing the valves 13 and 23, the first to n-th heat pipe control valves 17 _{1 to} 17 _n are opened one by one, and the hydraulic fluids in the _first to n-th accumulators 16 _{1 to} 16 _n are respectively opened. 3 to 1st to nth
Inject into the heat pipes 20 _{1 to} 20 _n . Thereafter, the first to nth heat pipe control valves 17 _{1 to} 17 _n are closed, the inlets of the _first to nth heat pipes 20 _{1 to} 20 _n are closed off, and the first to nth heat pipe connection joints 19 are connected. _{The 1st} to n-th heat pipes 20 _{1 to} 20 _n are separated from _{1 to} 19 _n, and the respective heat pipes 20 _{1 to} 20 _n are removed from the _1st to n-th heat pipe holders 21 _{1 to} 21 _n . Then, set the next heat pipe 20 _{1 to} 20 _n to each heat pipe holder 21 _{1 to} 21 _n, and set these heat pipes.
20 _{1 to} 20 _n are connected to the heat pipe connection joints 19 _{1 to} 19 _n , the valves 25, 17 _{1 to} 17 _n are opened and the accumulators 16 _{1 to} 16 _n and the heat pipes 20 _{1 to} 20 _n are connected. evacuated, performs liquid injection work of the working fluid 3 for each heat pipe 20 ₁ to 20 _n in the same manner.

FIG. 2 shows another embodiment of the still 1 used in the present invention. In this embodiment, the lower part of the container 2 is a partition plate.
At 26, the undistilled hydraulic fluid storage chamber 27A and the distilled hydraulic fluid storage chamber 27B are partitioned, the undistilled hydraulic fluid storage chamber 27A stores the undistilled hydraulic fluid 3A, and the distilled hydraulic fluid storage chamber 27B is distilled. It is designed to contain the liquid 3B. Along with this, the heater 4 is installed below the undistilled working fluid storage chamber 27A. Further, a collection container 28 for the distilled working liquid 3B is provided in a ring shape on the inner circumference of the lower part of the condensation chamber 2A above the container 2. A liquid injection pipe 29 for supplying the distilled working liquid 3B to the distilled working reservoir chamber 27B is connected to the lower portion of the recovery container 28. The hydraulic fluid take-out passage 12 is connected to the lower portion of the distilled hydraulic fluid storage chamber 27B.
A drain valve 30 is connected to the lower portion of the undistilled working fluid storage chamber 27A.

In this way, liquid injection can be performed with respect to the heat pipes 20 ₁ to 20 _n using reliably distilled distilled spent working fluid 3B.

If the first to nth accumulators 16 _{1 to} 16 _n are used as measuring containers, the liquid injection pump 14 for measuring can be omitted.

[Effects of the Invention] As described above, according to the hydraulic fluid filling device for a heat pipe of the present invention, the following effects can be obtained.

(A) A distiller of a type in which the working liquid is evaporated in a closed container, condensed at the upper part, and returned to the lower part to repeat distillation, and unnecessary gas accumulated at the upper part in the container is discharged from an exhaust passage. Therefore, it is possible to carry out distillation with a small and inexpensive distillation facility without using a huge and expensive purification device.

(B) Since the accumulator is interposed between the liquid injection pump and the heat pipe, it is possible to efficiently inject liquid into not only one but also a plurality of heat pipes without contacting air.

(C) Since the communication passage that connects the accumulator and the evaporation chamber in the evaporator is provided, the gas of bubbles generated during the liquid injection into the accumulator can be extracted into the distiller, and the bubbles can be removed without contacting the outside air. It can be performed.

[Brief description of drawings]

FIG. 1 is a system diagram showing one embodiment of a working liquid filling device for heat pipes according to the present invention, and FIG. 2 is a longitudinal sectional view showing another embodiment of a distiller used in the present invention. 1 ... Distiller, 2 ... Container, 3 ... Working fluid, 3A ... Undistilled working fluid, 3B ... Distilled working fluid, 4 ... Heater, 5 ... Cooling jacket, 6 ₁ , 6 ₂ ... 1st, 2nd thermoelectric Pair, 7 ... Replenishing port, 8 ... Level meter, 9 ... Exhaust flow passage, 10 ... Exhaust control valve, 11 ... Vacuum pump, 12 ... Hydraulic fluid take-out passage, 13 ... Hydraulic fluid take-out control valve, 14 ... Note Liquid pump, 15 ₁ to 15 _n ... 1st to nth accumulator control valve, 16 _{1 to} 16 _n ... 1st to nth accumulator, 17 _{1 to} 17 _n ... 1st to nth heat pipe control valve, 18 ₁ to 18 _n ... _1st to _n- th flexible hoses, 19 _{1 to} 19 _n ... 1st to n-th heat pipe connection joints,
20 _{1 to} 20 _n ... 1st to nth heat pipes, 21 _{1 to} 21 _n ... 1st
~ Nth heat pipe holder, 22A ... Common communication passage, 22B ₁
... 22B _n ... 1st to n-th branch communication passages, 23 ... communication control valve, 24 ... heat pipe vacuum evacuation flow path, 25 ... evacuation control valve, 26 ... partition plate, 27A ... undistilled working fluid storage chamber, 27B ...
Distilled working fluid storage chamber, 28 ... Collection container.

Claims (1)

[Claims] 1. A working liquid filling device for a heat pipe for filling a heat pipe with a working liquid, wherein the working liquid is evaporated in a container closed to the atmosphere, condensed at the upper part and returned to the lower part repeatedly. A distiller for distilling, an exhaust flow path for exhausting unnecessary gas accumulated in the upper part of the interior of the distiller, an exhaust control valve connected to the exhaust flow path, and a downstream side of the exhaust flow path. An evacuation pump, a working fluid take-out passage for taking out the working fluid distilled from the distiller, a working fluid take-out control valve and a pouring pump connected to the working fluid take-out passage, and a working fluid take-out flow. An accumulator connected to the passage via an accumulator control valve for accumulating the working fluid, and a heat pipe connection joint connected to the accumulator via a heat pipe control valve. A communication passage connecting the evaporation chamber in the distiller and the accumulator, a communication control valve connected to the communication passage, and a flow passage between the accumulator control valve and the heat pipe control valve. A heat pipe vacuum evacuation channel for performing evacuation of the heat pipe connected to the heat pipe connection joint, and a vacuum evacuation control valve connected to the heat pipe evacuation channel. A working fluid filling device for heat pipes.