JPH01260293A - Operating liquid pouring device for heat pipe - Google Patents

Abstract

PURPOSE:To pour operating liquid easily under normal temperature and pressure, by a method wherein the liquid pouring pipe and the supplying pipe of pressurizing gas are allowed to communicate respectively with a bottom part under a liquid level in a sealed operating liquid vessel, but on a weighing machine, and the upper part of the liquid level. CONSTITUTION:A sealed type operating liquid vessel 22 reserving operating liquid is put on a weighing machine 30. A liquid pouring pipe 23, connected to the nozzle 32a of a container 32 for a heat pipe and interposed with opening and closing valves 23a-23c, is allowed to communicate with a bottom under a liquid level in the operating liquid vessel 22 and the end of a pressurizing gas supplying pipe 24 is allowed to communicate with the upper part of the liquid level in the vessel 22 while the liquid pouring pipe 23 is branched to connect it to a vacuum suction pump 27 through an air suction valve 26a. According to this method, the pouring of a low-boiling point operating liquid for the container for the heat pipe may be effected easily under normal temperature and pressure without employing a large-sized cooling device. Further, the measurement of a pouring amount may be effected easily and correctly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention is directed to the step of filling a working fluid in a heat pipe.
The present invention relates to a device for injecting a working fluid into a heat pipe container, and particularly to a device suitable for injecting a working fluid with a low boiling point.

Conventional technology heat pipes change the type of working fluid sealed inside depending on the temperature range in which they are used; for example, -8
When used in the range of 0 to 40℃, ammonia is -
Freon is used as the working fluid in the range of 40 to 110°C, methanol is used in the range of 0 to 150°C, and water or the like is used in the range of 30 to 200°C. Especially Freon R
Hydraulic fluids such as Freon No. 11 and Freon R12, which transport heat in a temperature range of about -40 to 110° C., are widely used because they are optimal as working fluids for heat pipes for snow melting and anti-freezing purposes.

For example, Fig. 2 shows an example of a hydraulic fluid injection device used in a commonly used injection method, in which a transparent measuring container 1 containing a hydraulic fluid is provided with a scale 1a. A liquid injection pipe 3 is connected to the lower part of this measuring container 1 via an on-off valve 2.
is connected, and the lower part of the liquid injection pipe 3 is connected to a horizontally arranged distribution pipe 4, and this distribution pipe 4 is provided with a plurality of branch pipes 5 at approximately equal intervals. An injection adapter 5a is connected to the lower end of each via an on-off valve 6. Further, a vacuum pump 7 is connected to the distribution pipe 4 through an intake pipe 9 having an on-off valve 8 interposed therebetween, and an on-off valve 10 for opening to the atmosphere is provided at the end of the distribution pipe 4.

When injecting the working fluid with this working fluid injection device, first, the heat vibe container 11 is attached to each injection adapter 5a, and the nozzle tube 11a provided at the tip side of each heat vibe container 11 is inserted into the heat vibe container 11. The on-off valve 2 of the liquid injection pipe 3 and the on-off valve 10 for opening to the atmosphere are closed, and the on-off valve 6 of each branch pipe 5 and the on-off valve 8 of the intake pipe 9 are closed. Open vacuum pump 7
by driving said distribution pipe 4. Each branch pipe5. The inside of each heat vibrator container 11 and nozzle tube 11a is degassed.

Next, when the on-off valve 8 of the intake pipe 9 is closed and the on-off valve 2 of the liquid injection pipe 3 is opened, the inside of the distribution pipe 4 and each branch pipe 5 are in a vacuum, so that the operation inside the measuring container 1 is The liquid is sucked and filled into the liquid injection pipe 31, the distribution pipe 4, and each branch pipe 5, and only the inside of each heat vibrator container 11 and nozzle tube 11a is maintained in a vacuum state. and,
When only one opening/closing valve 6 of the branch pipe 5 at the end is opened, the working liquid is supplied to the heat vibrator container 11 connected to the injection adapter 5a of the branch pipe 5 through the nozzle tube 11a. An injection is made.

Furthermore, the working fluid L(7)I to be injected into each heat vibrator container 11 is determined to be the most efficient for heat transport by the heat vibrator, and is applied to the transparent measuring container 1 at the time of injection. The injection amount is read from the drop in the liquid level by the scale 1a, and when a predetermined amount of working liquid is injected, the on-off valve 2 is closed, and the branch pipe 5 connected to the heat vibrator container 11 that has completed injection is opened and closed. Close valve 6. Then, the height of the liquid level lowered by the injection is used as a measurement standard for the injection amount for the next injection. Next, the opening/closing valve 6 of the branch pipe 5 connected to the heat vibrator container 11 to be injected is opened, and the hydraulic fluid is injected in the same manner. In this way, the working liquid is injected into each heat vibrator container 11 one by one, and once the working liquid has been injected into all the heat vibrator containers 11 connected to the branch pipe 5, the crimping tool After crushing and sealing the nozzle tube 11a of each heat vibrator container 11 by, for example, removing it from the inside of the hydraulic fluid container. Further, the working fluid remaining in the device is discharged outside the device by opening the on-off valve 10.

Problems to be Solved by the Invention However, in the case of the conventional hydraulic fluid injection device described above, the hydraulic fluid can be injected into a plurality of heat vibrator containers 11 by repeating the injection operation. Only when the working fluid does not boil or evaporate at room temperature and pressure, such as water, for example, Freon R11 (boiling point is 23,7
When injecting a hydraulic fluid used in a low temperature range such as Freon R12 (boiling point is -29.8°C), the injected working fluid rises by 1vIi at normal temperature and pressure and is likely to evaporate. When the above-described conventional hydraulic fluid injection device is used, the operation starts at the moment a small amount of hydraulic fluid is injected into the heat vibrator container 11 in a vacuum state from the nozzle tube 11a, which has a small inner diameter of about 1 mm. There is a problem in that the liquid boils and the vapor of the working liquid is ejected from the nozzle tube 11a, which increases the vapor pressure inside the heat vibrator container 11, making it difficult to inject the working liquid.

In addition, in the conventional hydraulic fluid injection device described above, a measuring container 12, a hydraulic fluid reservoir, a liquid injection pipe 39, a distribution pipe 4. There is also a method of cooling the branch pipe 5 and the heat vibrator container 11 and injecting the working fluid in a state where boiling is suppressed, but this increases the cost of cooling equipment, increases the size of the device, and increases the manufacturing cost of the heat vibrator. There was a problem with that.

On the other hand, there is a method of pressurizing the inside of the hydraulic fluid container and forcibly injecting it, but in this case, the hydraulic fluid container must be a pressure-resistant container, so a transparent container such as glass cannot be used as the hydraulic fluid container. First, there was a problem in that the amount of hydraulic fluid injected could not be measured using the hydraulic fluid container.

This invention was made against the above-mentioned technical background.
The purpose of the present invention is to provide a heat pipe hydraulic fluid injection device that is capable of injecting a low boiling point hydraulic fluid that boils at room temperature and pressure, and that has a simple structure.

Means for Solving the Problems As a means for solving the above-mentioned problems, a hydraulic fluid injection device for a heat vib according to the present invention includes a closed hydraulic fluid container for storing hydraulic fluid placed on a scale, and a heat vibrator. A liquid injection pipe connected to the nozzle of the pipe container and equipped with an on-off valve is connected to the bottom of the hydraulic fluid container below the liquid level, and the end of the pressurizing gas supply pipe is connected to the hydraulic fluid. It is characterized in that it communicates above the liquid level in the container, and that the liquid injection pipe is further branched and connected to a vacuum suction source via another on-off valve.

Operation With the above configuration, when injection is performed, pressurized gas is supplied to the upper part of the hydraulic fluid container storing the hydraulic fluid through the supply pipe, thereby reducing the pressure inside the container. After increasing the temperature, open the on-off valve of the liquid injection pipe and inject the pressurized working liquid in the container into the evacuated heat vibrator container.

In that case, even if the hydraulic fluid boils, the hydraulic fluid is injected against the vapor pressure. In addition, the amount of injection can be determined as a decrease in weight using a scale.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG.

The hydraulic fluid injection device 21 is equipped with a metal, pressure-resistant sealed hydraulic fluid container 22 that stores a hydraulic fluid with a low boiling point, such as Freon R11, which easily boils under normal temperature and normal pressure. A liquid injection pipe 23 that delivers the working liquid stored inside the container and a supply pipe 24 that supplies pressurizing gas that pressurizes the inside of the container are connected. The liquid injection pipe 23 has one end inserted through the upper part of the hydraulic fluid container 22 in an airtight manner,
The tip thereof is immersed in the hydraulic fluid reservoir and extends near the bottom of the container, and an on-off valve 23a is provided in the portion of the fluid injection pipe 23 that extends outside from the top of the hydraulic fluid container 22. An electromagnetic on-off valve 23b is interposed on the downstream side of the on-off valve 23a, and the other end on the roughly downstream side is connected to the distribution pipe 25 via the on-off valve 23c at a position lower than the bottom of the hydraulic fluid container 22. There is. Further, the distribution pipe 25 has a plurality of branch pipes 2 arranged almost horizontally and vertically.
5a, and each of these branch pipes 25a has an injection valve 2.
5b and adapter 2 for connecting the heat pipe container
5c are provided respectively.

Further, an intake pipe 26 having an intake valve 26a is connected to the end side of the distribution pipe 25, and the end of this intake pipe 26 is connected to a vacuum pump 27. The insides of the liquid pipe 23, the distribution pipe 25, each branch pipe 25a, and the intake pipe 26 can be completely constricted.

Further, the end of the distribution pipe 25 on the side to which the intake pipe 26 is connected is opened to the atmosphere via a discharge valve 28, making it possible to remove the working liquid remaining in each pipe.

On the other hand, one end of the supply pipe 24 is airtightly inserted into the upper part of the hydraulic fluid container 22, and one end thereof is opened above the liquid level in the container, and a supply valve 24a is provided at the part extending outside. The other end is connected to a pressurizing nitrogen gas cylinder 29 via a pressure gauge 24b and a pressure reducing valve 24c.
By supplying nitrogen gas into the working fluid container 22, pressure is applied from above to the liquid surface inside the container.

Further, the hydraulic fluid container 22 is placed on a horizontally installed weighing scale 30 so that its weight can be measured.
The weighing scale 30 also includes a display mechanism (not shown) that can instantly read changes in weight, and the weighing scale 30 and an electromagnetic on-off valve 23b interposed in the liquid injection pipe 23.
A controller 31 is connected between the two and controls the opening and closing of the electromagnetic on-off valve 23b according to the weight of the hydraulic fluid container 22 measured by the weighing scale 30. It is equipped with

When injecting the working fluid, the distribution pipe 2
To each adapter 25c of the branch pipe 25a provided in plurality in 5,
Nozzle tube 3 at one end of heat vibe container 32
2a are connected to each other.

Note that, other than the weight of the hydraulic fluid container 22, for example, the amount of the liquid injection pipe 23, the supply pipe 24, etc. is not added to the droplet meter 30.

Next, a case will be described in which the working liquid stored in the working liquid container 22 is injected into the heat pipe container 32 by the working liquid injection device 21 configured as described above.

First, the supply valve 24a of the hydraulic fluid injection device 21 is opened to supply pressurizing nitrogen gas to the hydraulic fluid container 22 to pressurize the inside of the container to a predetermined pressure. In addition, each heat pipe container 32
For example, 100 g of hydraulic fluid is injected into the controller 31, and a set value is stored in the controller 31 so that a closing command is issued to the electromagnetic on-off valve 23b every time the measured value decreases by 100 g from the measured value at the start of injection. let

Then, after airtightly connecting the nozzle tubes 32a to each adapter 25c provided in the plurality of branch pipes 25a of the distribution pipe 25 and attaching each heat pipe container 32, the injection valve 25b of each branch pipe 25a and vacuum pump 27
The vacuum pump 27 is driven with the intake valve 26a of the intake pipe 26 following this opened, and the on-off valve 23c of the liquid injection pipe 23 and the discharge valve 28 provided in the distribution pipe 25 closed, and the heat pipe container is opened. 32. nozzle tube 32a,
The inside of each of the branch pipe 25a9, the branch pipe 25, and the intake pipe 26 is degassed, and the inside of each is sufficiently vacuumed.

Next, the heat pipe container 32. When the insides of the nozzle tube 32a, branch pipe 25a1, branch pipe 25, and intake pipe 26 are in a vacuum state, the vacuum pump 27 is stopped, and the intake valve 26a and the injection valve 25b of each branch pipe 25a are all closed. The on-off valve 23c of the liquid injection pipe 23 is opened. When the on-off valve 23C is opened, the liquid injection pipe 23 is communicated with the vacuum distribution pipe 25, and the pressurized hydraulic fluid in the hydraulic fluid container 22 is sent out through the liquid injection pipe 23. The distribution pipe 25 and the plurality of branch pipes 25a are filled with the heat pipe, and only the inside of each heat pipe container 32 is maintained in a vacuum state. Therefore, in this state, lff1 of the hydraulic fluid container 22 that stores the hydraulic fluid is measured, and the displayed measured value is zero-reset as a reference value, and when it decreases by 100 g from this reference value, the controller 31 A closing command is issued to close the electromagnetic on-off valve 23b.

Then, when the injection valve 25b of the branch pipe 25a to which the single-mouth heat pipe container 32 is attached is opened, the electromagnetic on-off valve 23b is simultaneously opened and the pressurized working liquid flows into the nozzle tube 32a. After that, it is injected into the heat pipe container 32. At this time, if the boiling point of the working liquid is low, the inside of the heat pipe container 32 is in a vacuum state, so the working liquid boils at the moment it is injected into the main body of the heat pipe container 32 from the nozzle tube 32a. However, since the working liquid is pressurized, it is smoothly injected against the pressure of steam in the working liquid in the heat pipe container 32.

When the injection progresses and 100g of working liquid is injected into the heat pipe container 32, the controller 31 detects that the working liquid in the container has decreased by 100g from measurement by the II meter 30, and starts the electromagnetic opening/closing. A closing command is sent to the valve 23b to cause it to close automatically, and the injection of the working fluid into the single-port heat pipe container 32 is completed. When the injection is completed, the injection valve 25b of the branch pipe 25a connected to the heat pipe container 32 is closed, and the injection valve 25b of the branch pipe 25a connected to the next second heat pipe container 32 is opened. Injection of hydraulic fluid takes place. The electromagnetic on-off valve 23b installed in the liquid injection pipe 23 is opened at the same time as the injection valve 25b is opened, and when injection of a predetermined amount is completed, the electromagnetic on-off valve 23b is opened from the controller 31 as before. By repeating the above operation, a fixed amount of working liquid is accurately injected into each of the plurality of heat pipe containers 32.

When the injection of the working liquid into all the heat pipe containers 32 connected to the plurality of branch pipes 25a of the working liquid injection device 21 is completed, the nozzle tube 32a of each heat vibrator container 32 is removed with a tool. After crushing and sealing, it is removed from each branch pipe 25a and transferred to the next process. Further, the working liquid remaining in each pipe of the working liquid injection device 21 is discharged from there by opening the discharge valve 28 provided in the distribution pipe 25.

As described above, in the case of the hydraulic fluid injection device 21 of this embodiment, the weight of the hydraulic fluid container 22 was measured using the scale 30, and a predetermined width of hydraulic fluid was injected into each heat pipe container 32. The controller 31 detects this because the measured value of the weight scale 30 decreases during one run, and the electromagnetic on-off valve 23b
Since the valve is automatically closed to stop the injection, it is possible to inject a fixed amount of the working fluid, eliminating variations in the amount of working fluid during the heat vibration, and improving the quality of the heat vibration.
Stability can be significantly improved. In addition, since the remaining amount of hydraulic fluid in the container can be easily determined using the scale 30, there is no need to redo the injection work due to insufficient fluid volume, and the timing of refilling the hydraulic fluid or replacing the empty fluid container can be determined appropriately. The container can be easily replaced.

In addition, since the amount of hydraulic fluid to be injected is determined by measuring the ff1ffi of the hydraulic fluid container containing the hydraulic fluid, the hydraulic fluid container does not need to be a transparent container and can be made of metal with high pressure resistance. It is possible to inject the working fluid at a higher pressure, which has the effect of making the injection work easier and reducing the injection time.

In the above embodiment, the electromagnetic on-off valve 23b was provided in the middle of the liquid injection pipe 23, but instead of this electromagnetic on-off valve 23, the injection valve 25b provided in each branch pipe 25a was used as an electromagnetic on-off valve. The weight scale 3 is controlled by the controller 31, respectively.
The opening/closing control may be performed in conjunction with 0. Also,
The injection valves 25b and the electromagnetic on-off valves 231) may be linked.

In addition, an on-off valve 23 interposed on the distribution pipe 25 side of the liquid injection pipe 23
c may be an electromagnetic opening/closing valve, which may be connected to the controller 31 to control opening/closing.

Further, in the above embodiment, a device including only one hydraulic fluid container 22 has been described, but a plurality of hydraulic fluid containers may be used to facilitate replenishment of hydraulic fluid and replacement of containers.

DETAILED DESCRIPTION OF THE INVENTION As described in detail, the heat vibrator hydraulic fluid injection device of the present invention includes a closed hydraulic fluid container for storing hydraulic fluid! ! The liquid injection pipe connected to the nozzle part of the heat pipe container and equipped with an on-off valve is connected to the bottom of the hydraulic fluid container below the liquid level, and pressurizing gas is placed on the suspension device. The end of the supply pipe is connected above the liquid level in the working liquid container, and the liquid injection pipe is branched and connected to a vacuum suction source via another on-off valve, so that it is connected to the heat pipe container. It is possible to easily inject a working fluid with a low boiling point at room temperature and pressure without using a large-scale cold storage device. In addition, it can be grown efficiently even in high temperature environments such as during the summer.
It has the advantage that liquid can be injected and the amount of injection can be easily and accurately measured.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the configuration of a hydraulic fluid injection device according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing a conventional example. 21... Hydraulic fluid injection device, 22... Hydraulic fluid container,
23... Liquid injection pipe, 23a, 23C... Open/close valve, 2
3b...Solenoid on-off valve, 24...Supply pipe, 25.
...Distribution pipe, 25a... Branch pipe, 25b... Injection valve, 25c... Adapter, 26... Intake pipe, 2
7... Vacuum pump, 29... Nitrogen gas cylinder,
30... Weight scale, 31... Controller, 32
... Container for heat pipe, 32a... Nozzle tube, L... Working fluid.

Claims (1)

[Claims] A closed type hydraulic fluid container for storing hydraulic fluid is placed on a scale, and a fluid injection pipe connected to the nozzle part of the heat pipe container and equipped with an on-off valve is connected to the liquid level in the hydraulic fluid container. communicating with the vicinity of the bottom of the hydraulic fluid container, and communicating the end of the pressurizing gas supply pipe above the liquid level in the hydraulic fluid container,
A working fluid injection device for a heat pipe, characterized in that the fluid injection pipe is further branched and connected to a vacuum suction source via another on-off valve.