JPS61128094A - heat pipe - Google Patents

Abstract

PURPOSE:To enable transfer of heat for a long distance by holding the temperature of a main heat pipe about at a specified value, by a method wherein an inner pipe and an outer pipe are disposed to the inside and the outside of the main heat pipe. CONSTITUTION:An inner pipe 1, a main heat pipe 2 located outsidfe the inner heat pipe, and an outer heat pipe 3 situated outside the main pipe are concentrically located in order named. In a heat absorbing part, the inner pipe 1 is longmost, and theend part of the main heat pipe 2 located thereoutside is connected in an enclosed manner to the outer peripheral surface of the inner heat pipe 1 to form the heat absorbing part. Further, the end part of the shortmost outer heat pipe 3 is connected in an enclosed manner to the outer peripheral surface of the main heat pipe 2. In the radiating part, the main heat pipe 2 is longmost and wraps the inner heat pipe 1, and the end part of the outer heat pipe 3 located thereoutside is connected in an enclosed manner to the outer peripheral surface of the main heat pipe 2 to form the radiating part.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention particularly relates to a heat pipe that allows heat transfer over long distances.

(Prior Art and Problems to be Solved) Conventional heat pipes are composed of a single-walled pipe, such as a copper pipe or stainless steel pipe, in which a working liquid such as water or methanol is sealed inside a container with both ends sealed. When heat is transferred over a long distance using such a heat pipe, heat radiation or absorption occurs along the way, making it impossible to efficiently transfer the heat from the heat source to the destination remote location.

For this reason, the large-scale use of hot spring heat, sea water heat, etc. was limited due to distance, and was limited to within 100 meters at most.

(Means for Solving the Problems) The present invention solves the above-mentioned problems and provides a heat pipe that enables particularly long-distance heat transfer, and includes an inner heat pipe, an outer main heat pipe, and The outer heat pipes on the outside are arranged concentrically in order, and the inner heat vibe is the longest in the heat absorption part, and the end of the main heat pipe on the outside is hermetically connected to the outer peripheral surface of the inner heat pipe. The shortest end of the outer heat pipe is sealed and connected to the outer peripheral surface of the main heat pipe, and in the heat dissipation section, the main heat pipe encloses the inner heat pipe and the longest outer The heat pipe is characterized in that the end portion thereof is formed in a hermetically connected manner to the outer peripheral surface of the main heat pipe.

(Example) Broom 1 Figure 1 shows a longitudinal sectional view of an example of a heat pipe according to the present invention. (1) is an internal heat pipe, which is made up of a container (4) formed by sealing both ends of a copper pipe, stainless steel pipe, etc., and filling a working liquid such as water or methanol in the internal space (■), similar to conventional heat pipes. Similarly to the conventional method, a wick may be provided on the inner circumferential surface of the container (2) if necessary. Note that the heat pipe (1) is the longest (projects in the axial direction) in the heat absorption part, that is, the part A in the figure.

■ is the main heat pipe, and metal pipes such as copper pipes, stainless steel pipes, etc. are placed concentrically outside the inner heat pipe (1) at a distance from the inner heat pipe (1), and the inner heat pipe ( 1) The shorter end (2) is hermetically connected to the outer peripheral surface of the inner heat pipe (1). - The brave heat section, that is, the B section, has the longest protruding length, and its end W&■ is a pipe (e itself is sealed and contains the inner heat pipe (1), and the inner heat pipe (1)
A working liquid is sealed in the sealed space (g) between the main heat pipe (2) and the main heat pipe (2).

(3) is an external heat pipe, and a metal pipe QD such as a copper pipe or a stainless steel pipe is arranged concentrically at a distance from the main heat pipe Pipe ■Shorter than GZ on both ends
is hermetically connected to the outer periphery of the main heat pipe ■ to form a sealed space G between it and the main heat pipe ■, and the sealed space 03 is filled with a working fluid to connect the outer heat pipe ■. It consists of

If necessary, an external heat pipe configured in this way (
The outer surface of 31 is insulated with heat insulating material, except for the heat absorption part of each heat pipe and the heat radiation part of the main heat pipe ■. An M layer is provided.

As mentioned above, in a heat pipe constructed of triple tubes, each heat pipe (1) (2) absorbs heat in section A, and the heat travels parallel to the tube toward section B in the direction of the arrow. The heat of the main heat pipe (2) is radiated at the BIBS. The heat of the one-way heat pipe (1) and the external heat pipe (3+ is transferred to the main heat pipe ■, and compensates for the drop in temperature of the main heat pipe ■. Furthermore, an external heat pipe ■ is formed outside the main heat pipe ■. In addition, heat insulation! remains constant, allowing heat transfer over long distances.

In addition, in this embodiment, each heat pipe is preferably supported via a suitable spacer that does not inhibit the movement of the working fluid, and by corrugating the heat pipe, flexibility can be obtained, similar to the cable. Drum winding becomes possible, making it easier to create long heat pipes.

Furthermore, if the main heat pipe (■) and the outer heat pipe (3) require a lie/I line, they may be provided on the inner peripheral surface of the pipe as in the conventional method, but in this application, as shown in FIG.
As shown in (b), it can be provided on the outer circumferential surface of each of the container (4) of the inner heat vibrator (1) and the container (2) of the main heat pipe (2), so it can be implemented very easily.

Figure 2 (A) shows an example of a group wick Qcj, and it is only necessary to groove the outer surfaces of the container (4) of the inner heat pipe (1) and the container (6) of the main heat pipe (■), making it extremely easy to perform precise machining. Furthermore, it can be applied continuously to a long pipe.Furthermore, Fig. 2 (b) shows an example of a wick (Is') made of mesh or ultrafine fibers, which can be applied to the container (4) described above.
All you need to do is to place these fibers on the outer surface of the container (4) (a) and secure them with a band or the like on top of the container (4) (a). It can be applied to long pipes.

Also, depending on how the heat pipe is used or the type, it may be necessary to provide a wick only in a part of the pipe.In particular, in the heat pipe of the present invention, a wick is not required in the heat dissipation section of the main heat pipe (■); It is also extremely easy to provide a wick.

(Effects of the Invention) According to the heat pipe of the present invention described above, it has a triple tube structure in which the inner heat pipe and the outer heat pipe are arranged inside and outside the main heat pipe, so the outer heat pipe absorbs the heat of the main heat pipe. In addition to acting as a resistance, the heat of Ml can be transferred to the main heat pipe by the inner and outer heat pipes to keep it warm, so the temperature of the main heat pipe can be kept approximately constant and long-distance heat transfer is possible.

Furthermore, if a wick is required for the main heat pipe and the outer heat pipe, it is extremely easy to perform wick processing on the outer peripheral surfaces of the inner heat pipe and the main heat pipe, respectively, and it is possible to form a long pipe or a partial wick. is also easy.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of the heat pipe according to the present invention, and FIGS. 2(a) and 2(b) are explanatory diagrams of wick formation. 1...Inner heat pipe, 2...Main heat pipe, 3
...Outer heat pipe, (2) (6) (10...each heat pipe container, 5,9.13...closed space part,
! 0...fin, 14...thermal layer.

Claims (4)

[Claims] (1) An inner heat pipe, a main heat pipe on the outside of the inner heat pipe, and an outer heat pipe on the outer side of the inner heat pipe are arranged concentrically in order, and in the heat absorption part, the inner heat pipe is the longest and the end of the main heat pipe on the outside is the longest. is hermetically connected to the outer circumferential surface of the inner heat pipe, and the shortest end of the outer heat pipe is hermetically connected to the outer circumferential surface of the main heat pipe. A heat pipe characterized in that the pipe includes an inner heat pipe, and the longest end of the outer heat pipe is hermetically connected to the outer peripheral surface of the main heat pipe. (2) The heat pipe according to claim 1, wherein the wicks of the main heat pipe and the outer heat pipe are formed on the outer peripheral surfaces of the inner heat pipe and the main heat pipe, respectively. (3) The heat pipe according to claim 2, characterized in that the wick is formed only in necessary locations of the heat pipe, and is not particularly provided in the heat radiation section of the main heat pipe. (4) The heat pipe according to claim 1, wherein a heat insulating layer is formed on the outer surface of the outer heat pipe except for the heat absorption part of each heat pipe and the heat radiation part of the main heat pipe.