JPH01159595A - Liquid injection method into container for heat pipe and device therefor - Google Patents

Abstract

PURPOSE:To inject liquid effectively into a container, by depressurizing the internal section of an operating liquid vessel into which a heat pipe container provided with an enclosed part on one end and a nozzle on the other end is submerged and, replacing a gas within the container with the operating fluid. CONSTITUTION:After a specified number of containers 1 into which a liquid must be injected, is submerged into an operating liquid 11, a lid 13 is closed so as to enclose a liquid injection vessel 10. Then, the internal pressure within the liquid injection vessel 10 is lowered under the aforesaid status by driving a vacuum pump. As a result, an air is forcibly discharged from the internal part of the container 1. At the same time, a specified amount of hydraulic liquid 11 flows into the internal part of the container 1, responding to the reduction is pressure. This operation is not subjected to any restriction with respect to the number of containers which must be submerged into the operating liquid. Moreover, there is no need for connecting the pipes to the containers, which makes it possible to inject liquid efficiently. At the same time, the containers are continuously submerged into the operating liquid having a specified degree of vacuum by a transportation means and conveyed. It is, therefore, possible to automate liquid injection operation and hence improve the perforance efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method for injecting a working fluid into a heat pipe container having a small-diameter nozzle attached to one end in the process of manufacturing a heat pipe, and a method thereof. The present invention relates to a device for implementing the above.

Conventional Technology As is well known, the general configuration of a heat pipe is to vacuum degas the inside of a metal tube with good thermal conductivity, such as copper, aluminum, or stainless steel, and to heat water, fluorocarbon, etc. in the desired temperature range. The working fluid to be evaporated is sealed in the metal tube, and a wick made of wire mesh or the like that generates capillary pressure is provided inside the metal tube. For example, as shown in FIG. 3, the container 1 for a heat pipe made of the above-mentioned metal has one end sealed by means such as welding,
And those with nozzle 2 attached to the other end are often used,
The nozzle 2 is used to crush and seal the interior of the container 1 after vacuum degassing in the final process, and therefore, in order to maintain airtightness, a nozzle 2 with a small diameter and made of the same material as the main body of the container 1 is used. It is being

Therefore, after going through preliminary processes such as cleaning, the wick 3
When injecting working fluid into the container 1 into which a It is not possible to inject the liquid by simply immersing it in the working liquid, and for this reason, the following methods have conventionally been adopted.

The first method is the so-called pressure reduction method, in which a liquid injection pipe and a pressure reduction pipe are connected to the container via a valve, and the liquid injection pipe and the pressure reduction pipe are connected to each other from inside the container via the pressure reduction pipe. After degassing, the valve is switched to inject hydraulic fluid into the container from the fluid injection pipe. The second method is to use a syringe-needle-like tube, in which the syringe-needle-like tube with the inner diameter of the nozzle or less is inserted into the container from the nozzle, and the hydraulic fluid is pressurized with a pump. This method is to send it into the container from there. Furthermore, the third method is a method that can be referred to as the so-called heating and cooling method, in which a heating tank and a cold fJ] tank are each filled with working fluid, and the container is immersed in the working fluid in these tanks. In this method, the container is heated and cooled alternately, thereby expanding and contracting the gas inside the container and forcibly exhausting it, while at the same time sucking the working fluid into the container.

Problems to be Solved by the Invention However, the above-mentioned so-called depressurization method requires that a liquid injection pipe and a pressure reduction pipe be attached to each container, and the liquid injection operation must be performed one by one, requiring simultaneous processing of a large number of bottles. Since it is impossible to do so, there is a problem of extremely low efficiency.

Furthermore, even in the second method described above, which uses a needle-like tube, the liquid must be injected one by one, and the work of inserting the needle-like tube into the nozzle must be performed manually. Because of this, there was a problem of poor work efficiency.

On the other hand, the third heating and cooling method has the advantage of being able to simultaneously inject liquid into multiple containers;
In addition to high energy costs for heating,
It takes time and effort to alternately immerse the product in a heating tank and a cooling tank, which ultimately increases running costs.Furthermore, depending on the quality of the product, heating may evaporate and harm the environment. Therefore, there was a problem that the applicable working fluid was restricted.

This invention has been made in view of the above circumstances, and provides a method for efficiently injecting liquid into a heat pipe container without increasing running costs, and a device for carrying out the method. The purpose is to

Means for Solving the Problems The method of the present invention is designed to achieve the above objectives.
This is a method of replacing the gas in the container with the hydraulic fluid by creating a pressure difference between the container settled in the J liquid and the hydraulic fluid.More specifically, the method of this invention A heat pipe container with one end sealed and a small-diameter nozzle provided at the other end is submerged in a liquid-phase working fluid with a sufficient barrier in a liquid injection tank, and the inside of the liquid injection tank is This method is characterized in that at least a portion of the gas in the container is replaced with a liquid-phase working fluid by reducing the pressure.

Furthermore, in order to continuously perform the above method for a large number of containers, the device of the present invention includes a liquid injection tank that contains a liquid phase preparation fluid, and a liquid injection tank that is sealed at one end and has a small diameter nozzle at the other end. A conveying means for continuously traveling from outside the liquid injection tank to the outside of the liquid injection tank through the liquid-phase working fluid in the liquid injection tank by placing a heat pipe container provided with the heat pipe almost horizontally or with the nozzle facing upward. and a shielding means for maintaining each opening in a predetermined airtight state in a state where the container and the transport means can pass through openings where the transport means enters the liquid injection tank and where the transport means exits the liquid injection tank; The feature # is that it is configured to include a pressure reducing means for sucking air from inside the liquid injection tank to reduce the pressure.

According to the method of the present invention, first, the container communicates with the atmosphere through its nozzle, so that the internal pressure is atmospheric pressure, and the container is filled with a liquid-phase working fluid, that is, a working liquid. be allowed to settle. In this state, since the nozzle has a small diameter, the flow of the hydraulic fluid and the flow of gas interfere with each other in the nozzle and obstruct the flow, so the hydraulic fluid does not actively flow into the container. When the hydraulic fluid is depressurized for this purpose, a large pressure difference occurs between the inside and outside of the container, which forces the gas inside the container to flow out from the nozzle, and a predetermined amount of hydraulic fluid flows into the container. Inflow. Furthermore, since the gas that has flowed out of the container rises to the surface of the hydraulic fluid and is exhausted, the gas continues to flow out from inside the container, resulting in the outflow of gas within the container and the infiltration of the hydraulic fluid. The gas and hydraulic fluid in the container are replaced, and the fluid is injected.

Further, in the apparatus of the present invention, the conveying means continuously conveys a large number of heat pipe containers placed thereon into the working liquid in the liquid injection tank and causes them to settle. The inside of the liquid injection tank is suctioned, and the opening through which the transport means passes is provided with a shielding means to maintain a predetermined airtightness, so the pressure inside the liquid injection tank is low. As a result, a pressure difference is generated between the inside and outside of the container, so that the gas inside the container is forcibly discharged, and the working fluid flows into the container accordingly. In this way, the hydraulic fluid flows in.

The container is further transported by the transport means and removed from the liquid filling tank. That is, the container is filled with liquid while being transported.

Embodiments Next, embodiments of the method and apparatus of the present invention will be described.

FIG. 1 shows a situation in which the method of the present invention is implemented, and a plurality of containers 1 to be filled with liquid are filled with liquid Ia1.
0 into the working fluid 11.

Here, as shown in FIG. 3, the container 1 has a structure in which a nozzle 2 with a small diameter (for example, the inner diameter is about 1#1) is provided in a main body portion whose one end is sealed, and a wick 3 made of a wire mesh or the like is inserted inside. The container 1 is placed in the hydraulic fluid 11 horizontally or with the nozzle 2 slightly elevated.

In addition, the liquid injection tank 10 has an opening 12 at the top for taking the container 1 in and out, and also has a suction decompression pipe for sucking the gas inside. 14 and a liquid supply pipe 15 for supplying the working fluid 11 are connected to the upper part to form a lζ configuration.

The suction pressure reducing pipe 14 is connected to a vacuum pump (not shown), and reference numbers 16 and 17 in FIG. 1 are valves.

Since the container 1 communicates with the atmosphere through the nozzle 2 before settling into the hydraulic fluid 11, the internal pressure is atmospheric pressure, and the container 1 which is settled in the working fluid 11 is connected to the atmosphere through the nozzle 2. Since the container 2 has a small diameter and the hydraulic fluid 11 does not naturally flow in, the inside of the container 1 is filled with air and is at atmospheric pressure.

After a predetermined number of containers 1 are settled in the working fluid 11, the M13 is closed to seal the liquid injection tank 10, and in this state, a vacuum pump is used to suck the liquid from inside the liquid injection tank 110 to reduce the internal pressure of the liquid injection tank 1o. lower. As a result, since the pressure of the hydraulic fluid 11 becomes lower than the pressure of the container 1, air is forcibly discharged from the inside of the container 1, and a predetermined amount of the hydraulic fluid 11 is accordingly discharged from the inside of the container 1. flows into. The amount of inflow varies depending on various factors such as *2 degrees, duration, size of the liquid injection tank, properties such as viscosity of the hydraulic fluid 11, internal volume and number of containers 1, and the desired amount of inflow and degree of vacuum. and its relationship with duration can be determined experimentally. For example, according to experiments by the inventors, when pouring water into more than 200 containers with an inner diameter of 8 mm and a length of 1001 + I#I, it takes 3 to 5 minutes using a vacuum pump of 2 W. I was able to inject the liquid completely. In addition, each container 1
The variation in the amount of liquid injected is related to the attitude of the container 1, and if the nozzle 2 is arranged in a slightly higher position, the variation in the amount of liquid injected can be minimized.

FIG. 2 is a partially sectional front view showing an example of the device of the present invention, and the device shown here is configured to continuously inject liquid into a large number of containers 1. That is, the hydraulic fluid 21 is accommodated inside the liquid injection 120, and an opening 22 for carrying in and an opening 23 for carrying out are formed in the upper part. In addition, a conveyor 2 consisting of a chain, belt, etc., carries a large number of containers 1 almost horizontally and runs continuously.
4 enters the liquid injection tank 20 through the carry-in opening 22, passes through the working fluid 21, and exits from the liquid injection tank 20 through the carry-out opening 23. Furthermore, each opening 22, 23 is provided with a shielding material 25, such as a rubber plate, which is pushed open by the running force of the conveyor 24 and closed by its own weight to maintain a predetermined airtight state.
26 are provided. Connected to the liquid injection tank 20 are a suction decompression pipe 27 that draws suction from the inside to create a vacuum pressure, and a liquid supply pipe 28 that supplies the working fluid 21.

In order to perform liquid injection with the above device, a sufficient amount of working fluid 21 is supplied into the liquid injection tank 20, and the inside of the liquid injection tank 20 is kept at a predetermined level by suctioning through the suction pressure reducing pipe 27. Set the vacuum level to
4 to continuously feed the container 1 on which the iE is placed into the liquid injection tank 20. When the container 1 is outside the liquid injection tank 2o, it communicates with the atmosphere through the nozzle 2, so the internal pressure is atmospheric pressure, and in that state it is conveyed into the liquid injection tank 120 by the conveyor 24. It is settled in the working fluid 21. Since the inside of the liquid injection tank 20 is set to a predetermined degree of vacuum, a pressure difference occurs between the inside of the container 1 settled in the working liquid 21 and the outside thereof, and as a result, a sudden air rush inside the container 1 occurs. is forcibly discharged, and accordingly, the working fluid 21 flows into the interior of the container 1 through the nozzle 2. Since the inflow amount is approximately proportional to the time that the container 1 is submerged in the liquid 21, by setting the running speed of the conveyor 24 to an appropriate speed determined experimentally, the container 1 is operated for an appropriate time. The hydraulic fluid 21 is allowed to settle in the liquid 21 and a predetermined amount of the working fluid 21 flows into the container 1. The container 1, which has been injected in this way, is transferred to the conveyor 2.
4 is continuously running, it is continuously carried out from the liquid injection tank 20. In addition, the openings 22, 23 for carrying in and carrying out through which the container 1 passes have shielding plates 25, 26 that are in constant contact with the container 1 or the conveyor 24 to limit the intrusion of sudden air to a minimum. The internal pressure of the liquid injection tank 20 is maintained at a predetermined degree of vacuum.

Therefore, according to the device shown in FIG. 2, the small diameter nozzle 2
The working fluid can be continuously and automatically injected into a large number of containers 1 to which the
It can be set appropriately depending on the degree of vacuum in the liquid injection tank 20 and the running speed of the conveyor 24.

Note that the container 1 into which the liquid has been injected by the method or device described above is heated in the subsequent process and the hydraulic liquid is poured into the container 1.
m, thereby completely exhausting the non-condensable gas inside, and then crushing and sealing the nozzle 2.
It is considered a heat pipe.

Effects of the Invention As is clear from the above explanation, the method of this invention has the following effects:
Because a container with a small-diameter nozzle attached is submerged in a hydraulic fluid whose pressure has been reduced to below atmospheric pressure, a pressure difference is created between the inside and outside of the container.As a result, the gas inside the container is replaced by the hydraulic fluid, and the liquid is injected. can be done. This type of operation does not limit the number of containers that can be submerged in the hydraulic fluid, and there is no need to connect special pipes to the containers.
Liquid injection can be performed efficiently. Furthermore, since the nozzle has a small diameter, it takes a certain amount of time for the working fluid to flow in, but according to experiments conducted by the present inventors, fluid injection can be completed in an extremely short time even when competing with the so-called heating and cooling method described above. was recognized, and work efficiency was improved by 85%.

Further, although the method of the present invention requires a pressure reducing means, the energy cost required for reducing the pressure is small and a special high degree of vacuum is not required, so running costs can be kept low. Furthermore, since the amount of liquid injected can be controlled relatively accurately depending on the degree of vacuum and the duration, it is also possible to obtain a high quality heat pipe.

Furthermore, according to the device of the present invention, the container is continuously lowered into the working fluid maintained at a predetermined degree of vacuum by the conveying means, and then taken out, so that the fluid injection operation can be automated and highly efficient. Furthermore, since processes that require a large amount of energy such as heating and cooling are not performed, liquid injection can be performed at low cost.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing a situation in which the method of the present invention is implemented, Fig. 2 is a partially sectional front view showing an example of the device of the invention, and Fig. 3 is a sectional view showing an example of a heat pipe container. It is. 1... Container, 2... Nozzle, 10.20.
...Liquid injection tank, 11.21...Working fluid, 22...
Carrying in opening, 23... Carrying out opening, 24...
・Conveyor, 25.26...Shielding plate, 14.27
...Suction pressure reducing pipe. Figure 1 Figure 3

Claims (2)

[Claims] (1) A heat pipe container sealed at one end and equipped with a small diameter nozzle at the other end is submerged in a sufficient amount of liquid-phase working fluid in a liquid injection tank, and the injection A method for pouring liquid into a heat pipe container, characterized in that at least a portion of the gas in the container is replaced with a liquid-phase working fluid by reducing the pressure inside the liquid tank. (2) A heat pipe container containing a liquid-phase working fluid and a heat pipe container with one end sealed and a small-diameter nozzle provided on the other end is placed approximately horizontally or with the nozzle facing upward, and A conveying means that continuously travels from the outside of the liquid tank to the outside of the liquid injection tank through the liquid-phase working fluid in the liquid injection tank, a place where the conveyance means enters the liquid injection tank, and a place where the conveyance means exits from the liquid injection tank. The container includes a shielding means for maintaining each opening in a predetermined airtight state in a state where the container and the transport means can pass through, and a depressurizing means for sucking air from inside the liquid injection tank to reduce the pressure. Features: Liquid injection device for heat pipe containers.