JP6845778B2 - Self-excited oscillating heat pipe with check valve and its main assembly - Google Patents

Description

The present invention relates to an assembly that is a main component for forming a self-excited oscillating heat pipe (OHP) provided with a check valve, and a self-excited oscillating heat pipe with a check valve using the assembly.

<< Reference 1 >> Japanese Unexamined Patent Publication No. 2017-67305 "Heat Transport System"
<< Reference 2 >> Japanese Unexamined Patent Publication No. 2017-40384 "Self-excited oscillating heat pipe and electronic device including the heat pipe"
<< Reference 3 >> Japanese Unexamined Patent Publication No. 2008-298342 "Manufacturing method of check valve, self-excited vibration heat pipe, heat generating device, check valve, self-excited vibration and heat pipe"
<< Reference 4 >> Yoshiro Miyazaki "Study of Self-Excited Vibration Heat Pipe" Fukui University of Technology Research Bulletin No. 37 2007 (http://crf.flib.u-fukui.ac.jp/dspace/bitstream/10461/3205) /1/KJ00004766986.pdf)
<< Reference 5 >> Hideyuki Fukuya et al. "Research on check valve for OHP" 57th Space Science and Technology Association Lecture Meeting October 9-11, 2013 << Reference 6 >> Junichi Mori et al. "For long-life OHP Reliability evaluation of check valve "59th Space Science and Technology Association Lecture Meeting October 7-9, 2015

Documents 1 and 2 disclose in detail the operating principle and basic configuration of the self-excited oscillating heat pipe. Documents 3 to 6 disclose in detail a self-excited oscillating heat pipe provided with a check valve. As disclosed in Documents 3 to 6, in a self-excited oscillating heat pipe with a check valve, the structure of the check valve, its manufacture, and its durability are major technical issues.

=== Conventional technology and its problems ===
As described in Documents 1 to 6, conventionally, for example, a heat pipe tube (metal thin tube) having an outer diameter of about 1 mm is bent into a predetermined form, and heat is transferred from a heating area to a cooling area. It constitutes a transporter (self-excited vibration heat pipe OHP). In the self-excited vibration heat pipe with a check valve in which a plurality of check valves are arranged at predetermined positions in the flow passage of the working fluid, as described in Documents 3 to 6, the heat pipe tube through which the working fluid flows. A check valve is incorporated in the (metal thin tube).

As disclosed or suggested in Documents 3 to 6, a heat transporter (self-excited vibration heat pipe with a check valve) is configured by bending a metal thin tube incorporating a check valve at a required point into a predetermined form. With the basic design of checking, the manufacturing technology around the check valve is not easy, it is difficult to stably build a check valve with low forward flow resistance and high check performance at low cost, and it is also durable. There was also a problem.

=== Innovation of invention ===
In the present invention, the basic technical idea of constructing a self-excited vibration heat pipe with a check valve using a metal thin tube is completely abandoned, and the flow path pattern of the working fluid and the check valve structure are provided in the metal plate. Inspired by the innovation of building in, he created the invention of the assembly specified by the following items (1) to (11).

(1) An assembly for a self-excited vibration heat pipe with a check valve, which is configured by integrally combining a first metal plate, a second metal plate, and a valve component. (2) A first metal plate and a second The metal plates are joined and fixed in close contact with each other, and at least the groove formed in the pattern on the joint surface of the first metal plate creates a space for a pipeline pattern for the flow of working fluid at the joint between the first metal plate and the second metal plate. (3) The pipeline pattern is a main flow path formed from a heating area to a cooling area in the first metal plate, and a plurality of main flow paths arranged at intervals. (4) The valve parts shall be every other of the plurality of main flow paths, including the adjacent communication path and the start-to-end communication path that connect these main flow paths like a single stroke to form one circulation flow path. It is incorporated in the middle of the main flow path and constitutes a check valve that allows the working fluid to flow in a predetermined direction in the main flow path in which it is incorporated. (5) The pipeline is located at a predetermined portion of the pipeline pattern. Externally open work holes for injecting working fluid into the pattern are communicatively formed.
(6) In the first metal plate, a groove having a rectangular cross section that serves as the pipeline pattern is formed on one side, and a second metal plate that is thinner than the first metal plate and has no groove is joined to the one side of the first metal plate. Be fixed
(7) The valve component constituting one check valve includes a ball serving as a valve body, a valve seat component whose valve hole is opened and closed by the ball, and a stopper component that regulates the movement of the ball. thing
(8) In the valve component constituting one check valve, the ball is housed in a groove serving as the main flow path and is located between the valve seat component and the stopper component.
(9) The valve seat component is fixed to a cylindrical valve seat mounting portion having a circular recess formed at the bottom of the groove at a predetermined position of the groove serving as the main flow path.
(10) The stopper part, the at a predetermined position of the main flow channel and becomes a groove, the recess of the circular formed in the bottom of the groove is fixed to a cylindrical stopper mounting portion and the bottom surface (11) wherein The valve seat component and the stopper component each have a disk-shaped pedestal formed in the recess at one end in the depth direction of the groove, and the second metal at the other end in the depth direction of the groove. A surface in contact with the board is formed

A self-excited oscillating heat pipe with a check valve can be constructed by injecting a working fluid into the pipeline pattern of the assembly configured as described above to close the working hole.

Plan view and cross-sectional view of the first metal plate (metal thick plate 1) Top view and side view of the second metal plate (thin metal plate 2) An exploded perspective view of a main part showing the relationship between the metal thick plate 1 and the metal thin plate 2 and the valve parts. Detailed view of the check valve incorporated in the groove of the flow path pattern Front view, side view, and plan view showing details of valve seat parts

Embodiment of the invention

=== Metal thick plate 1 and metal thin plate 2 ===
In the illustrated embodiment, the first metal plate is the thick metal plate 1 shown in FIG. 1, and the second metal plate is the thin metal plate 2 shown in FIG. The external dimensions of the metal thick plate 1 and the metal thin plate 2 are the same, for example, about 100 mm × 140 mm. The thickness dimension of the metal thick plate 1 is about 3 mm, and the thickness dimension of the metal thin plate 2 is about 1 mm. As the metal thick plate 1 and the metal thin plate 2, for example, aluminum or an aluminum alloy is suitable.

=== Grooves that form a flow path pattern ===
In one embodiment, the groove serving as the flow path pattern for flowing the working fluid is formed on one side of the metal thick plate 1, and the groove is not formed on the side of the metal thin plate 2. The flow path pattern is as shown in FIG. 1, and is the main flow path 3 formed from the heating area to the cooling area in the metal plate 1, and 10 lines arranged in parallel at predetermined intervals. Includes the main flow path 3 of the above, an adjacent connecting path 4 and a connecting path 5 from beginning to end, which form one circulation flow path by connecting these main flow paths 3 like a single stroke.

In one embodiment, the heating area is a portion of a metal plate 1 in which ten main flow paths 3 are connected by a U-shaped adjacent connecting path 4, for example, a portion near the upper side, and is referred to as a cooling area. Is the portion near the lower side on the opposite side of the metal plate 1. The opposite may occur depending on the direction of the check valve.

A groove extending from the center of the connecting path 5 to the lower side of the metal plate 1 is formed in a portion near the lower side of the metal plate 1, and this is a work hole 6a. A groove extending from the central U-shaped adjacent connecting path 4 to the upper side of the metal plate 1 is formed in a portion near the upper side of the metal plate 1, and this is a work hole 6b.

In order to form the groove of the above-mentioned pattern on one side of the metal thick plate 1, cutting using an end mill or the like is suitable, but other techniques such as press working, laser machining, and etching machining can also be adopted. Is. The cross-sectional shape of the groove is not limited to the rectangle as shown in FIG. 3, and may be a groove having a U-shaped cross section or a groove having a V-shaped cross section.

=== Check valve ===
A check valve having the configurations shown in FIGS. 3 and 4 is incorporated in the middle of every other main flow path 3 out of the 10 main flow paths 3 in the metal thick plate 1, and in that state, the metal thick plate 1 The thin metal plate 2 is brought into close contact with one side and fixed. That is, the upper opening surface of the groove is closed by the metal thin plate 2, and the flow path pattern by the groove is enclosed in the joint portion between the metal thick plate 1 and the metal thin plate 2. Various joining techniques can be adopted for joining and fixing the metal thick plate 1 and the metal thin plate 2, for example, diffusion welding, vacuum brazing, resistance welding, electron beam welding, adhesives, screwing, etc. The technology of the above may be appropriately adopted and implemented.

In one embodiment shown in FIGS. 3 to 5, the valve components constituting the check valve are the ball 8 serving as the valve body, the valve seat component 9 whose valve hole is opened and closed by the ball 8, and the movement of the ball 8. It is composed of a stopper component 10 that regulates. A cylindrical portion serving as a valve seat mounting portion 11 and a cylindrical portion serving as a stopper mounting portion 12 are widened in the groove central portion of the main flow path 3 in which the check valve is incorporated, and the valve seat component is formed in the valve seat mounting portion 11. 9 is mounted, and the stopper component 10 is mounted on the stopper mounting portion 12. The ball 8 is housed in the groove of the main flow path 9 so as to be located between the valve seat component 9 and the stopper component 12, and can be freely moved between the component 11 and the component 12.

=== Self-excited oscillating heat pipe with check valve (heat transporter) ===
As described above, the valve parts (ball 8, valve seat part 9, stopper part 10) are incorporated in the groove of the main flow path 3 of the metal thick plate 1, and the metal thin plate 2 is brought into close contact with the metal thick plate 1 to be joined and fixed. By doing so, the assembly according to the embodiment of the present invention is completed. After that, using the two working holes 6a and 6b, a predetermined amount of a predetermined working fluid is injected into the flow path pattern included in the assembly, and the working holes 6a and 6b are closed with appropriate plug parts. This completes a self-excited oscillating heat pipe with a check valve as a heat transporter.

In the heat transporter manufactured as described above, the working fluid in the flow path pattern flows from the heating area side of the joint of the metal thick plate 1 and the metal thin plate 2 to the cooling area side through the check valve. However, although the fluid flows from the cooling area side to the heating area side through the main flow path 3 having no check valve, it does not flow through the main flow path 3 having a check valve. That is, it operates as a self-excited oscillating heat pipe with a check valve, and efficiently transfers heat from the heating area side to the cooling area side.

=== Other embodiments ===
(A) The second metal plate is also made of a thick metal plate, a groove is formed therein, and the flow path pattern can be formed by combining with the groove on the first metal plate side.
(B) The valve seat part or the stopper part can be integrally built in the first metal plate or the second metal plate.

=== Effect of invention ===
In the present invention, since the flow path pattern of the working fluid and the check valve structure are built in the metal plate, it is extremely easy to manufacture the check valve with high precision, and the reverse of high performance and high durability. Check valve can be easily realized. Since the joint of the first metal plate and the second metal plate can function as a large-capacity heat sink of the heat transporter, it is possible to improve the capacity as the heat transporter.

1 ... Metal thick plate (1st metal plate), 2 ... Metal thin plate (2nd metal plate), 3 ... Main flow path, 4 ... Adjacent connecting path, 5 ... All-out connecting path, 6a / 6b ... Work hole, 8 ... Ball (Valve body), 9 ... Valve seat parts, 10 ... Stopper parts, 11 ... Valve seat mounting part, 12 ... Stopper mounting part.

Claims (3)

The assembly specified by the following items (1) to ( 11).
(1) An assembly for a self-excited vibration heat pipe with a check valve, which is configured by integrally combining a first metal plate, a second metal plate, and a valve component. (2) A first metal plate and a second metal plate is fixedly joined in close contact with each other, the space conduit pattern for the working fluid flow by patterned grooves in the bonding surface of the first metals plate at the junction of the first metal plate and the second metal plate (3) The pipeline pattern is a main flow path formed from a heating area to a cooling area in the first metal plate, and a plurality of main flow paths arranged at intervals. (4) Valve parts are every other of a plurality of main flow paths, including adjacent communication paths and start-end communication paths that connect these main flow paths like a single stroke to form one circulation flow path. It is incorporated in the middle of the main flow path and constitutes a check valve that allows the working fluid to flow in a predetermined direction in the main flow path in which it is incorporated. (5) The pipeline is located at a predetermined portion of the pipeline pattern. Externally open work holes for injecting working fluid into the pattern are communicatively formed.
(6) In the first metal plate, a groove having a rectangular cross section that serves as the pipeline pattern is formed on one side, and a second metal plate that is thinner than the first metal plate and has no groove is joined to the one side of the first metal plate. Be fixed
(7) The valve component constituting one check valve includes a ball serving as a valve body, a valve seat component whose valve hole is opened and closed by the ball, and a stopper component that regulates the movement of the ball. thing
(8) In the valve component constituting one check valve, the ball is housed in a groove serving as the main flow path and is located between the valve seat component and the stopper component.
(9) The valve seat component is fixed to a cylindrical valve seat mounting portion having a circular recess formed at the bottom of the groove at a predetermined position of the groove serving as the main flow path.
(10) The stopper part, the at a predetermined position of the main flow channel and becomes a groove, the recess of the circular formed in the bottom of the groove is fixed to a cylindrical stopper mounting portion and the bottom surface (11) wherein The valve seat component and the stopper component each have a disk-shaped pedestal formed in the recess at one end in the depth direction of the groove, and the second metal at the other end in the depth direction of the groove. A surface in contact with the board is formed The assembly according to claim 1 , which is specified by the following item ( 12).
( 12 ) There are two working holes, and communication is formed at two remote locations in the pipeline pattern. A self-excited oscillating heat pipe with a check valve in which a working fluid is injected into the pipeline pattern of the assembly according to claim 1 or 2 to close the working hole.

Images