JPS6237690A - Heat pipe - Google Patents

Abstract

PURPOSE:To facilitate preservation of heat pipe by permitting detection of leakage of operating liquid sealed in a vessel. CONSTITUTION:Heat, generated from electronic instruments 9, is delivered by an internal fan 5 to a heat exchanger 4 and is dissipated by an external fan 6. The heat pipe, incorporated into the heat exchanger 4, is consisting of metallic pipes 1, whose upper ends are sealed and lower ends are connected to a leaked operating liquid receiving pan 7, attached to the lower part of the heat exchanger 4, by brazing or the like. The receiving pan 7 is connected to a sensor, located at the outside of a casing by a connecting pipe 8. When a part of the operating liquid leaks, the leaked operating liquid is collected to the receiving pan 7 through a path 3 and is guided to the outside of the casing. According to this method, the trouble of heat exchanger 4 may be found out in early period of the trouble and it may serve for the preservation of the instruments 9.

Description

[Detailed description of the invention] [Application field] The present invention relates to improvements in heat pipes.

[Prior art and its problems] For example, a control panel containing electronic equipment that is used under harsh dusty ambient conditions must have a sealed enclosure, and heat pipes are used as a method to remove the generated heat. A type heat exchanger is effective. However, since the heat pipe is a sealed housing, if the working fluid inside the heat pipe leaks, it cannot be removed to the outside, causing deterioration and damage to the electronic equipment. Furthermore, leakage of the working fluid results in a decrease in performance, and there is also the problem that the heat exchanger cannot be maintained. Furthermore, if a harmful working fluid leaks outside from a heat pipe heat exchanger for air conditioning, there is also the problem that it may affect the human body.

[Object of the Invention] An object of the present invention is to provide an improved heat pipe that is effective for maintenance and management.

[Summary of the invention] Key point 5 of the present invention is that the heat pipe is made of a metal tube with close contact waves rf1.
In addition, a working fluid passage extending in the longitudinal direction is provided at the boundary between the heat pipe and the metal tube, and if the working fluid leaks,
The working fluid can be led to the outside along the passage.

[Embodiment 1 of the invention Embodiments of the present invention will be described with reference to the drawings.

In the example shown in Fig. 1, a metal pipe 1 such as a steel pipe is provided with a plurality of grooves extending longitudinally around the entire inner circumference, and the vibrator 2 is inserted into the metal pipe 1 and swaged and handled so as not to reduce thermal conductivity. The metal tube 1 and the heat pipe 2 are brought into close contact with each other by means of a method such as the above, and a passage 3 extending in the longitudinal direction is formed at the interface, the cross section of which is shown in FIG.

FIGS. 3 and 4 show another example, and the difference from the example in FIG. The point is that the part is sealed.

In both examples, the passage 3 extends straight in the longitudinal direction, but it may also extend spirally. Further, although the passage 3 utilizes a groove provided on the inner surface of the metal tube 1, this may be configured by providing a similar groove on the outer surface of the container of the heat pipe 2, or Alternatively, the container of the heat pipe 2 may be constructed by corrugating the container.

FIG. 5 shows an example of application of the heat pipe according to the present invention. This is an example in which a heat pipe type heat exchanger 4 is used as a cooling method for a control panel 10 having a closed structure.

Electronic machine i! ! In this system, heat generated from the heat exchanger 19 is transferred to the heat exchanger 4 by an internal fan 5 and radiated by an external fan 6.

The heat pipe according to the present invention incorporated into the heat exchanger 4 includes:
The upper end side of the metal tube 1 is sealed and connected to a leakage hydraulic fluid receiver 7 attached to the lower part of the heat exchanger 4 by brazing or the like. The saucer 7 is connected to an external sensor via a connecting tube 8.

In such a configuration, if a part of the working fluid sealed in the container of the heat pipe 1 leaks for some reason, the working fluid will pass through the passage 3 and be collected in the saucer 7, and will be discharged to the outside. Since it is guided by the sensor of
It is possible to understand system functions and detect failures of the heat exchanger 4 at an early stage, which can be useful for equipment maintenance.

[Effects of the Invention] As described above, according to the present invention, it is possible to detect leakage of the working fluid sealed in the container, so maintenance of the heat pipe is easy, and a device using the heat pipe.

It is also effective for equipment maintenance. Furthermore, even if the hydraulic fluid is harmful to the human body, it can be detected without exposing it to the outside, which is also effective from a safety standpoint.

[Brief explanation of the drawing]

FIGS. 1 and 2 are cross-sectional views showing one embodiment of the P-1 pipe according to the present invention, FIGS. 3 and 4 are cross-sectional views showing another example of the present invention, and FIG. It is an explanatory view showing an example of use of the invention. 1: Metal pipe, 2: Heat pipe, 3: Leakage hydraulic fluid passage. Agent Patent Attorney Hiroshi Sato Fujio 10 '42 National Proposal 3 Preface 1 Vines 4I

Claims (2)

[Claims] (1) In a heat pipe formed by enclosing a working fluid as a heat transport medium in a closed tubular container, the heat pipe is closely covered with a metal tube, and the boundary between the heat pipe and the metal tube is covered in a longitudinal direction. A heat pipe characterized in that a passage for leakage hydraulic fluid is provided that extends into the heat pipe. (2) The heat pipe according to item 1 above, wherein one end of the metal tube is sealed.