JP2542912Y2 - Long heat pipe with inclined arrangement - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pipe which is installed and used with an evaporating section inclined.

[0002]

2. Description of the Related Art Some long heat pipes have conventionally used a corrugated pipe as a pipe container. The use of a corrugated pipe makes it possible to produce a long heat pipe at low cost. At the same time, flexibility is imparted to improve the transportability, and a large-diameter heat pipe can be manufactured. Further, when the heat pipe using the corrugated pipe is installed vertically, the recirculating hydraulic fluid flows uniformly in the circumferential direction in the corrugated pipe, so that the evaporation becomes uniform.

[0003]

However, when the evaporator is operated in a state where the evaporator is inclined, if the heat pipe has a small diameter, a wick is provided on the inner peripheral surface of the pipe, so that the entire evaporator is provided. The working fluid can be supplied sufficiently. However, in the case of a large-diameter heat pipe, as shown in FIG. 2, when the heat pipe is inclined, the hydraulic fluid F returns to a low place. Cannot be supplied sufficiently, and only the lower portion 1a evaporates and the upper portion 1b is in a dry-out state.

The present invention has been made in view of the above circumstances, and has as its object to provide a long heat pipe that can be efficiently operated by evaporating from the entire evaporating section even in an inclined state. I have.

[0005]

SUMMARY OF THE INVENTION The present invention provides the above-described object.
In order to achieve
The whole or a part of the evaporator is inclined with respect to the horizontal plane.
In a long heat pipe operated in the
A flexible cylindrical member is placed inside the inclined tube of the projecting part.
As it is inserted, its columnar member is
A plurality of radially projecting spacers
Keep a gap around the inner wall
And the gap is filled with hydraulic fluid
It is characterized by the following.

[0006]

[0007]

As described above, of the evaporating section arranged at an angle ,
By inserting a cylindrical member into the part,
The volume, that is, the volume of the gap
And therefore a relatively small amount of hydraulic fluid
Are filled. As a result, the entire inner wall of the evaporator
Because it is in contact with the hydraulic fluid, partial drying of the evaporation section
And the decrease in heat transport due to it
You. In addition, the columnar member is evaporated by the spacer.
Is held in the central part of the
Flow of bubbles generated by boiling of the working fluid
Road is secured. As a result, the boiling and evaporation of the working fluid is smooth
In this respect, a decrease in the heat transport capacity is also prevented.

In addition, since it has a columnar member,
Bending from shrinking part to evaporating part, and cylindrical in that direction
When inserting a member with a cylindrical shape, the cylindrical member
Can be bent and inserted together, heat pipe
Workability is improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG.

The large-diameter, long heat pipe 11 is used as a facility for pumping underground heat to the ground and releasing it into the atmosphere in an underground cold storage facility or the like, thereby lowering the underground temperature around the storage space. those are, uses a corrugated pipe 11a as a container tube, the evaporation portion 11b is formed on the lower side to be buried in the ground of a single tube, also condensing portion on the upper side which is extended on the ground 11c is made form the condensation unit 11
c is vertically extended to the ground, and the underground evaporator 11b
Is bent substantially at the center of the entire length so that the lower end side thereof has a predetermined inclination, and is formed in the shape of a "<" .

A cylindrical member 12 made of foamed resin is provided inside the evaporating portion 11b buried underground in an inclined state.
Gap of a predetermined size is formed between the but are inserted, by a spacer 12a which is formed out collision a plurality of radially from near both ends of the cylindrical member 12, the container tube 11a inner surface of the evaporation portion 11b It is provided as follows. Cylindrical member 12 is working fluid F in the evaporator section 11b which is inserted in this is, is filled so as to fill the inclined portion, by the volume portion of the cylindrical member 12 is inserted to fill The hydraulic fluid F has been reduced. A wick 13 is provided on the inner peripheral surface of a vertical portion of the evaporating portion 11b buried underground near the condensing portion 11c, and only the lower end of the wick 13 has the hydraulic fluid F.
It is provided to be immersed in. Further, a plurality of disk-shaped heat radiation fins 14 are provided substantially horizontally on the outer periphery of the condensing portion 11c extending vertically to the ground.

Next, the operation of this embodiment configured as described above will be described.
Is buried in the ground of the part to be cooled, the evaporating part 11b is heated by the heat of the surrounding soil, and the working fluid F is heated and boiled in the part in contact with the inner surface, and the steam is passed through the working fluid F The inclined part is moved upward in a bubble state. At this time, the columnar member 12 is provided inside the inclined portion, and a predetermined gap is secured between the outer periphery of the columnar member 12 and the inner surface of the evaporator 11b by the spacer 12a. Therefore, vapor bubbles can move smoothly. A wick 13 is provided on the inner surface of the evaporator 11b in a vertically disposed portion of the evaporator 11b close to the condenser 11c to form an effective evaporator surface exposed from the level of the hydraulic fluid F. , The evaporation efficiency is increased.

The vapor that has moved upward reaches the low-pressure low-temperature condensing section 11c on the upper end side of the heat pipe 11, where heat is deprived of the condensing section 11c and condensed. Return. At this time, the heat carried as latent heat by the steam is released from the tube wall of the condensing section 11c to the atmosphere via the radiation fins. Then, the working fluid F that has returned to the liquid phase descends along the inner surface of the condensing section 11c by gravity, and returns to the working fluid pool of the evaporating section 11b. In this way, the underground heat is pumped up by the heat pipe 11 to cool a predetermined range of soil, for example, the peripheral wall of the underground refrigeration facility.

In the above embodiment, since the corrugated pipe is used as the container pipe, the heat pipe can have flexibility. Therefore, the pipe can be transported in a straight line and bent into a predetermined shape on site. This has the effect of facilitating transportation.

[0015]

As described above, according to the present invention, in a long heat pipe used in a state where a long evaporating tube is inclined, a cylindrical member is formed in the evaporating tube, and a space is formed around the cylindrical member. And the working fluid was filled in the evaporating section, so that even if the large-diameter and long heat pipe was operated with its evaporating section inclined, it did not dry out, and the evaporating section did not dry out. Since the amount of the working fluid to be charged can be significantly reduced as compared with the volume, the cost can be reduced.

Further, a columnar part inserted into the evaporating tube
Because the material is flexible,
Insertion is easy, and the column
The process of bending the place becomes easy. And its columnar shape
The member is secured by a plurality of radially projecting spacers.
And kept separated from the inner wall of the evaporator.
The flow path of air bubbles generated by the boiling of the hydraulic fluid.
And the entire inner surface of the evaporator contacts the hydraulic fluid.
Heat transfer as a whole heat pipe
The transmission capacity can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view showing one embodiment of a long heat pipe of an inclined arrangement type according to the present invention.

FIG. 2 is a sectional side view showing an evaporating section of a conventional inclined arrangement type heat pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Heat pipe 11b Evaporation part 11c Condensing part 12 Columnar member 12a Spacer

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shinichi Sugihara 1-5-1, Kiba, Koto-ku, Tokyo Inside Fujikura Electric Wire Co., Ltd. (72) Inventor Masahiko Ito 1-5-1, Kiba, Koto-ku, Tokyo Fujikura Electric Wire (56) References JP-A-61-36692 (JP, A) JP-A-1-106776 (JP, U) JP-A-56-155255 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A long heat pipe comprising an evaporator and a condenser, wherein the evaporator is operated in a state where the whole or a part of the evaporator is inclined with respect to a horizontal plane, wherein the evaporator has an inclined pipe. The flexible cylindrical member is inserted
And the cylindrical member radiates to the outer periphery
Inner wall of the pipe by a plurality of spacers projecting in
Separated from the surface and maintained with a gap around it
It is inclined arrangement type long heat pipe, characterized that you hydraulic fluid in the portion of the gap has been filled.