JPS5918387A - Heat pipe - Google Patents

Abstract

PURPOSE:To enable to improve the efficiency of the heat pipe function by a structure wherein separate pipes, through one with wick therein of which liquid passes and through the other of which gas passes, are employed in order to realize smooth flows of the fluids. CONSTITUTION:The wick 2 is packed in the heat pipe main body 1. The pipe 5 for shifting gas connects to the main body 1 at the positions 6 and 7 respectively. Working fluid for setting a predetermined temperature is sealed in the pipe comprising the main body 1 and the pipe 5. When top heat mode is supposed here, evaporated working fluid, which flows down from an evaporator section 42 through a pipe 45, liquefied itself due to low ambient temperature at a lower liquefier section 41. Liquid 50 is led through a pipe 43 to the upper evaporator section 42 by means of a pump 44 in order to turn into upper liquid 51, resulting in repeating the circulation and consequently realizing the smooth flows of the respective fluids and the improvement of the efficiency of the heat pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to improving the performance of heat pipes.

In conventional heat pipes, a wick for moving a liquid working fluid and a space for moving a gaseous working fluid coexist within the same pipe.

This means that in a heat pipe where the direction in which the liquid flows and the direction in which the gas flows are opposite, each fluid acts to obstruct the flow of the other fluid. Furthermore, it is technically difficult to install the wick evenly along the inner surface of the heat pipe.

This invention solves the above-mentioned drawbacks of conventional heat pipes by separating liquid movement and gas movement, smoothing the flow of each fluid and increasing efficiency, and making it easy to attach a wick to the pipe. This is what I did.

That is, in FIG. 1, a wick (2) is packed inside a heat pipe body (1). Gas transfer pipe (
9 connects to (1) with (6 and (force), respectively.

(4) and (4) are spaces for vaporizing liquid and liquefying gas, respectively. With this structure, a working fluid at a predetermined temperature is sealed in this pipe.

In this way, the wick (2) in (1) can be packed uniformly inside the pipe, so like the wick of a conventional heat pipe, grooves are made on the inner periphery along the inner surface of the pipe, or wire mesh is uniformly packed inside the pipe. Difficult machining such as bluffing is not required, and a large cross-sectional area can be obtained.The pipe (1) with the wick through which the liquid passes and the pipe (51) where the gas passes are each passed through separately, so the flow of each fluid is reduced. is carried out smoothly.

Figure 2 shows the separation of liquid and gas in Figure 1 in the same pipe, with a partition wall (1
3), a space (14) is provided as a gas passage, and a wick (12) is filled on the opposite side of 2 to serve as a liquid passage. FIG. 3 shows a sectional view taken along the line AA in FIG.

In FIG. 4, the fluid separation in FIG. 1 is constructed by using a double pipe, and a wick (22) is inserted between an outer pipe (21) and an inner pipe (23).

(24) is a space for gas to pass through (25), and (26) are spaces for liquefaction and vaporization, respectively.

Figure 6 shows the gas passage and liquid passage in Figure 4 replaced with the outer pipe (61) and inner pipe (61).
Gas passes through the gap between 62), and liquid passes through the wick (57+) in the inner pipe (32).

Figure 8 shows a cross section of the heat pipe, through which the heat pipe passes.

By clearly separating the working fluid passages for liquid and gas in this way, each fluid flows smoothly without interfering with each other, and since the wick only needs to be packed in a predetermined space, it can be used as a pipe like a conventional heat pipe. This eliminates the need for difficult processing such as making fine grooves along the inner surface of the heat pipe or installing wire mesh, making it easy to manufacture, making the heat pipe as a whole easier and cheaper to manufacture.

FIG. 9 shows a further separation of the liquid and gas working fluid passages. In conventional heat pipes, the movement of the liquid working fluid is limited by capillary action, and the performance is particularly low in the dump heat mode. In other words, there are limits to the movement of liquid by capillary action. Assuming the top heat mode, in the lower liquefaction section (41) in Fig. 9, the vaporized working fluid that has flowed from the vaporization section (42) through the pipe (45) is liquefied at a low temperature on the outer periphery (5).
0). (50) passes through the pipe (43) and the pump (
44), the liquid enters the upper vaporization section (42) and becomes the upper liquid 7 (51), where the circulation is repeated. (diagonal) is a float.

(49) is the guide, (48) is the magnet attached to (49), and when the liquid level of (50) falls, an external reed switch (46) or proximity switch is activated to stop the pump (44). (52) is a screen for facilitating the liquefaction of the vaporized working fluid.

In this way, since this invention does not need to rely on capillary pressure to move the liquid working fluid, it can exceed the limits of conventional heat pipes and can demonstrate sufficient performance even with larger height differences. □Ability is not limited by force) and others, especially when there is a difference in height.

[Brief explanation of the drawing]

Figures 1 and 2 are longitudinal cross-sectional views, Figure 3 is a cross-sectional view from Figure 2 A-A, Figures 4 and 6 are longitudinal cross-sectional views, and Figure 5 is a cross-sectional view from Figure 4 B-B.
7 is a sectional view taken along line CO in FIG. 6, FIG. 8 is a sectional view, and FIG. 9 is a vertical sectional view.

Claims (1)

[Claims] 1. In a heat pipe formed by enclosing a wick and a working fluid, the passage for the liquid working fluid and the passage for the gaseous working fluid are separated into separate pipes, or within the pipe. Install a partition wall. Alternatively, by providing an inner pipe within the pipe to clearly separate and separate them, eliminating interference in the flow direction of the opposing liquid and gas phases of the working fluid, and thereby making the cross section of the dedicated pipe narrower. A heat pipe that has a structure that allows the wick to fully perform its functions, and that makes the installation of the wick that forms the capillary tube easier than conventional ones.2. It has a liquid transfer pipe that moves liquid working fluid using a pump, and a pipe that moves gaseous working fluid. It consists of a liquefaction chamber and a vaporization chamber that are connected by these, and the displacement of the liquid level in the liquefaction chamber is measured by the movement of a float with a magnet. The heat pipe consists of a system that controls the pump by activating a reed switch or a proximity switch.