JPS6350622Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to an apparatus used when manufacturing a heat pipe and injecting a working fluid into a container forming the exterior body of the heat pipe.

BACKGROUND ART As is well known, a heat pipe is a device that transports heat as latent heat of the working fluid by heating and evaporating a working fluid sealed inside a container, and then releasing and condensing the vapor after flowing. Therefore, in order to smoothly evaporate and condense the working fluid,
It is necessary to exhaust as much non-condensable fluid as possible inside the container, and for this reason, the working fluid is injected into a given container as described below. That is, a container that has been sealed at one end and thoroughly cleaned is connected to a vacuum pump via a valve on the one hand, and to a metering container located below the working fluid storage tank on the other hand via a valve. With the side valve closed, the inside of the container is vacuumed by a vacuum pump to exhaust non-condensable fluids such as air, and then the valve on the vacuum pump side is closed and the valve on the measuring container side is opened to collect a predetermined amount. A working fluid is allowed to flow into the interior of the container. In this case, in order to prevent the non-condensable fluid from flowing again into the interior of the container which has been vacuum-suctioned, the interior of the measuring container is also evacuated to exhaust the non-condensable fluid.

By the way, when injecting the working fluid as described above, the internal pressure of the working fluid storage tank is approximately equal to the vapor pressure of the working fluid at ambient temperature, while the inside of the measuring container is under vacuum. Therefore, the working fluid in the working fluid storage tank is injected into the measuring container at a pressure that is the sum of the internal pressure difference between the two and the water head difference due to the difference in installation height between the two. However, when the valve between the working fluid storage tank and the metering container is opened, the liquid-phase working fluid flows into the metering container, expands adiabatically, and evaporates, so the internal pressure of the metering container becomes equal to the vapor pressure of the working fluid. The pressure becomes equal to the internal pressure of the working fluid storage tank. On the other hand, in order to prevent the inflow of non-condensable fluids, it is necessary to have a sealed structure for each of the working fluid storage tank and the measuring container. Therefore, when the working fluid flows down into the metering container, the pressure inside the working fluid storage tank is reduced, whereas the internal pressure of the metering container increases, and the pressure difference is reversed from top to bottom. As a result, when the pressure difference becomes equal to the head difference, the working fluid stops flowing down, and there is a problem that it becomes impossible to inject more than a certain amount of working fluid into the metering container. This situation is the same when the working fluid is injected from the measuring container into the heat pipe container, and in any case, conventionally it has been difficult to inject the working fluid into the heat pipe container.

Purpose of the invention This invention was made in view of the above circumstances, and it is an object of the present invention to provide a device that can prevent the mixing of non-condensable gases and can quickly and reliably inject working fluid into a heat pipe container. The purpose is to

Structure and operation of the invention This invention arranges a working fluid storage tank, a metering container, and a heat pipe container, all of which have a sealed structure, along the vertical direction so that the working fluid flows down due to the difference in water head, and also arranges them through valves. The working fluid storage tank, the metering container, and the heat pipe container are successively connected by an inserted injection pipe, and in order to equalize the internal pressure of these three, the upper space inside the working fluid storage tank and the inside of the metering container are connected. The upper space in the measuring container is communicated with a pressure equalizing pipe in which a valve is inserted, and the upper space in the measuring container and the heat pipe container are in communication through a second pressure equalizing pipe in which a valve is inserted. That is.
Therefore, according to this invention, since a vacuum state or a reduced pressure state that opposes the water head difference that causes the working fluid to flow down does not occur, the working fluid can be quickly and reliably injected into the heat pipe container.

Embodiment An embodiment of this invention will be described below with reference to the accompanying drawings. In FIG. 1, a closed-structure measuring container 3 is arranged below a closed-structure working fluid storage tank 2 containing a working fluid 1. The bottom of the working fluid storage tank 2 and the top of the metering container 3 are communicated with each other through an injection pipe 5 in which a valve 4 is inserted, while being isolated from the outside air. Further, a second injection pipe 7 with a valve 6 inserted is provided at the bottom of the measuring container 3, and the injection pipe 7 is connected to a heat pipe container 8.
By connecting to the nozzle at the upper end of the
The working fluid 1 is allowed to flow from the metering container 3 into the heat pipe container 8 while being isolated from the outside air.

Further, a pressure equalizing pipe 9 is provided between the upper end of the working fluid storage tank 2 and the upper end of the measuring container 3, which communicates the upper spaces inside each, and a valve 10 is inserted into the pressure equalizing pipe 9. ing. The pressure equalizing pipe 9 is branched between the measuring container 3 and the valve 10, and the branched second pressure equalizing pipe 11
is connected below the valve 6 in the second injection pipe 7, and a valve 12 is inserted in the second pressure equalizing pipe 11, so that the upper space of the measuring container 3 and the heat pipe container 8 are connected to each other. are communicated with each other by a second pressure equalizing pipe 11.

A vacuum pump 13 is connected to the second injection pipe 7 below the valve 6 via a valve 14.

In order to inject the working fluid 1 into the heat pipe container 8 using the above device, first, the heat pipe container 8 is connected to the second injection pipe 7, and then the heat pipe container 8 is connected to the heat pipe container 8 using the vacuum pump 13. 8 and the inside of the measuring container 3 to suck and exhaust non-condensable fluid such as air. Then, the valve 4 in the injection pipe 5 that communicates the working fluid storage tank 2 and the metering container 3 is opened to drain the working fluid 1 in the working fluid storage tank 2.
is allowed to flow into the measuring container 3. In that case, the working fluid 1 that has flowed into the metering container 3 expands adiabatically, the internal pressure of the metering container 3 and the internal pressure of the working fluid storage tank 2 are balanced, and furthermore, due to the water head difference, the working fluid 1 flows into the metering container 3. 1 flows down, but the first pressure equalizing pipe 9
By opening the valve 10 at , the gas in the metering container 3 (i.e. the vapor of the working fluid) flows into the interior of the working fluid storage tank 2 , thereby preventing a decrease in the pressure in the working fluid storage tank 2 and an increase in the pressure in the metering container 3 . can.

After sufficiently injecting the working fluid 1 into the measuring container 3 as described above, when injecting the working fluid 1 from the measuring container 3 into the heat pipe container 8, a valve provided in the second injection pipe 7 is used. 6 is opened, and the valve 12 in the second pressure equalizing pipe 11 is also opened. The working fluid 1 that has flowed into the heat pipe container 8 through the second injection pipe 7 expands adiabatically because the inside of the heat pipe container 8 is in a vacuum.
As a result, the inside of the heat pipe container 8 becomes at the vapor pressure of the working fluid 1 according to the surrounding temperature, and after that, the working fluid 1 further flows from the metering container 3 into the heat pipe container 8, but the heat pipe container Since the gas in the heat pipe container 8 (that is, the vapor of the working fluid) flows into the metering container 3 through the second pressure equalizing pipe 11, it is possible to prevent the pressure in the heat pipe container 8 from increasing and the pressure to decrease in the metering container 3. Smoothly heat pipe container 8
It can be injected inside. Then, measure the injection amount in container 3.
When the injection amount reaches a specified amount, the injection is stopped by closing the valve 6 of the injection pipe 7.

Effects of the invention As is clear from the above explanation, according to this invention, the internal spaces of the working fluid storage tank, metering container, and heat pipe container are communicated with each other to equalize the pressure, and the difference in installation height is Because there is no pressure condition that would inhibit the flow of the working fluid due to the water head difference, the working fluid can be quickly and reliably injected into the heat pipe container, and the entire path is sealed from the outside air. Therefore, it is possible to reliably prevent non-condensable gas such as air from entering the inside of the heat pipe.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of this invention. 1... working fluid, 2... working fluid storage tank,
3... Measuring container, 4, 6, 10, 12... Valve, 5, 7... Injection pipe, 8... Heat pipe container, 9, 11... Pressure equalization tube.

Claims (1)

[Scope of utility model registration request] A measuring container with a sealed structure is arranged below the working fluid storage tank, a heat pipe container is arranged below the measuring container, and the working fluid is stored so that the working fluid flows down due to the difference in water head. The tank and the measuring container are communicated with each other while being isolated from the outside air by a first injection pipe having a valve inserted therein, and the measuring container and the heat pipe container are connected by a second injection pipe having a valve inserted therein. The upper space in the working fluid storage tank and the upper space in the measuring container are communicated through a first pressure equalizing pipe in which a valve is inserted, and the measuring container An apparatus for injecting working fluid into a heat pipe container, characterized in that an upper space inside the heat pipe container and the inside of the heat pipe container are communicated with each other through a second pressure equalizing pipe in which a valve is inserted.