JPH07286790A - Top heat type thermosiphon - Google Patents

Abstract

PURPOSE:To make external power unnecessary by a thermosiphon and permit the same to be used as a top heat type. CONSTITUTION:In a top heat type thermosiphon used as a top heat type, operating liquid A is sealed into a sealed pipe 2, the upper part of the pipe 2 is used as an evaporating section 3 by arranging a heating unit 5 and the lower part of the same is used as a condensing section 4 by arranging the tank 6 of cooling water W. A liquid reservoir 11 is provided at the inner periphery of the evaporating section 3 at the upper part of the pipe 2, the operating liquid A in the condensing unit 4 can be supplied into the liquid reservoir 11 through a liquid returning pipe 13 equipped with a pump 14 and a turbine 15, inserted into the cooling water supplying pipe 7 of the water tank 6, is connected to the pump 14 so that the pump is driven continuously by the rotation of the turbine 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermosiphon which can be used in a top heat mode in which heat is transferred from the top to the bottom, and more particularly to a thermosiphon having means for returning condensed working fluid from the bottom to the top. .

[0002]

2. Description of the Related Art Conventionally, a thermosyphon as a heat transporting means only encloses a working fluid in a vacuumed state in a sealed pipe, and the condensed working fluid recirculates only by gravity. Is configured. Therefore, when the pipe is used, it is always installed such that the evaporating section at one end of the pipe is located at the bottom and the condensing section at the other end is located at the top. Then, by absorbing heat in the lower evaporation section, the working fluid evaporates and moves to the upper condensation section for heat transport, and the working fluid that radiates heat and condensed in the condensation section returns to the lower evaporation section by gravity. In this way, the working fluid is circulated while changing the phase and heat is transported from the bottom to the top so that it operates in a bottom heat system.

[0003]

By the way, in the above-mentioned prior art, since the thermosiphon is of a bottom heat type in which the working fluid is circulated by gravity, conversely, the evaporating section is located above the condensing section. This is not applicable when the is placed underneath and used in the top heat mode. There is a heat pipe that can carry out bidirectional heat transfer, and when used in the top heat type, the condensed working fluid is refluxed from the bottom to the top using the capillary force of the wick and the osmotic pressure of the osmosis membrane. can do. But in the case of heat pipes,
There is a limit to the reflux of the hydraulic fluid by the capillary force of the wick, and the height of the top heat is, for example, up to about 30 cm.

The present invention has been made in view of the above circumstances and eliminates the need for external power by a thermosiphon.
It is intended to be usable in top heat mode.

[0005]

In order to achieve the above-mentioned object, the present invention is designed so that a working liquid is enclosed in a hermetically sealed pipe, and the upper portion of the pipe is arranged as a vaporizing portion and the lower portion is In a top-heat type thermosiphon used in a top-heat system by arranging it in a cooling water tank as a condensing part, a liquid pool is provided in the inner circumference of the evaporation part above the pipe, and the pipe is connected to the liquid pool. A pump for supplying the working fluid in the condensing part from the lower end of the pump is provided through the liquid return pipe, and the turbine and the pump inserted in the liquid feed pipe connected to the water tank are continuously pumped by the rotation of the turbine. It is characterized in that it is configured to drive.

[0006]

According to the present invention having the above-described structure, the pump is driven without using external power by rotating the turbine by utilizing the cooling water in the water tank arranged in the condenser section under the pipe of the thermosiphon. Then, by driving the pump and the liquid return pipe, the liquid-phase working fluid accumulated in the condensation section at the lower part of the pipe is conveyed to the liquid pool at the evaporation section at the upper part of the pipe, and thus the working fluid of the liquid continuously flows from bottom to top. Is forced to return to. Then, the working fluid in the liquid reservoir is evaporated by the heating section and flows to the condenser section at the lower portion of the pipe to circulate, whereby heat is transferred from the top to the bottom in a top heat manner.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. The configuration of the top heat type thermosiphon will be described with reference to FIGS. 1 and 2. Thermosiphon 1 is
The pipe 2 is hermetically sealed and vacuum degassed, and the phase-changeable condensable hydraulic fluid A is enclosed in the pipe 2. As a top-heat type, a heating unit 5 is arranged in the vicinity of the upper portion of a pipe 2 which is erected substantially vertically to form an evaporation unit 3. Further, below the pipe 2, a water tank 6 having a supply pipe 7 and a discharge pipe 8 for the cooling water W is installed to serve as a condensing unit 4,
In the return system path from the condensing section 4 to the evaporating section 3, a forced recirculation means 10 for the working fluid A utilizing the flow of the cooling water W is provided.

The forced return means 10 is a pipe 2 of the evaporator 3.
A partition member having a V-shaped cross section is attached to the inner periphery of the liquid reservoir 11 to form a liquid reservoir 11, and a restriction plate 12 for restricting evaporation of the hydraulic fluid A is attached to an upper opening of the liquid reservoir 11. Further, the liquid return pipe 13 is once taken out of the pipe 2 from the lower end of the pipe 2 of the condensing part 4, and then inserted through the inside of the pipe 2 upward and communicated with the liquid reservoir 11 at the upper end. 2 A pump 14 is attached to a portion exposed to the outside.

On the other hand, in water pipes and the like, a technique for generating electricity by rotating a turbine by utilizing a pressure difference due to water pressure has already been established. Therefore, in order to use this technique, the turbine 15 is inserted inside the supply pipe 7 of the cooling water W so as to rotate due to the pressure difference accompanying the flow of the cooling water W, and the turbine 15 generates electric power by the rotation. It is connected to the generator 16. The generator 16 is connected to the pump 14 so as to be driven by the generated electric power, so that the pump 14 can be continuously driven without external power.

Next, the operation of this embodiment will be described. First, in the condensing part 4 of the thermosiphon 1, the cooling water W is supplied to the water tank 6 through the supply pipe 7 at a predetermined water pressure, and the cooling water W is continuously discharged from the water tank 6 through the discharge pipe 8. Then, the turbine 15 of the forced circulation means 10
Rotates and is generated by the generator 16, and the generated power is supplied to the pump 14 to continuously drive the pump.

In the condenser 4 at the lower part of the pipe 2, the working fluid A is condensed by the cooling water W in the water tank 6 and accumulated in a liquid state. Therefore, the working fluid A of the liquid in the condensing part 4 is successively continuously conveyed upward by the drive of the pump 14 and the liquid return pipe 13, and is returned to the liquid reservoir 11 of the evaporating part 3 above the pipe 2 so that it is always full. It will be accumulated. In this way, by utilizing the flow of the cooling water W of the condenser section 4 below the pipe 2, the liquid working fluid A is continuously forcedly refluxed from the lower condenser section 4 to the upper evaporator section 3.

On the other hand, in the evaporation section 3 above the pipe 2, by being heated by the heating section 5, the working fluid A accumulated in the liquid reservoir 11 absorbs heat and evaporates, and the vapor is gradually cooled by the regulation plate 12. Overflow. Then, the overflowed steam flows toward the condensing unit 4 having a low temperature and radiates heat to the cooling water W of the water tank 6 to be condensed and become a liquid. By repeating this cycle, the hydraulic fluid A circulates vertically inside the pipe 2 while changing its phase, and is continuously heat-transferred from the upper evaporation section 3 to the lower condensation section 4 in a top heat manner. In the water tank 6, the transported water heats the cooling water W, and hot water is taken out through the discharge pipe 8. So this warm water,
It can be used for various purposes such as air conditioning and hot water supply.

Although the embodiment of the present invention has been described above, the turbine of the cooling water supply pipe of the water tank may be mechanically connected to the pump to be driven.

[0014]

As described above, according to the present invention, in the thermosiphon, the liquid reservoir is provided on the inner circumference of the evaporation portion at the upper part of the pipe, and the liquid return pipe equipped with the pump is provided from the lower end of the pipe to the liquid reservoir. Since the turbine and the pump, which are connected to each other so as to be able to supply the working fluid of the liquid in the condensing part and are inserted in the cooling water supply pipe of the water tank, are configured to continuously drive the pump by the rotation of the turbine, the pipe The liquid working fluid can be continuously forcibly refluxed from the lower condensing section to the upper evaporating section, and can be used in a top heat system. Further, since the pump is forcedly recirculated, the height of the top heat can be further increased, and the applicable range is expanded. Furthermore, since the pump is driven by utilizing the flow of cooling water supplied to the water tank of the condenser, external power is not required.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a top heat type thermosiphon according to the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG.

[Explanation of symbols]

1 ... Thermo siphon, 2 ... Pipe, 3 ... Evaporator,
4 ... Condensing part, 5 ... Heating part, 6 ... Water tank, 7 ... Cooling water supply pipe, 10 ... Forced reflux means, 11 ... Liquid reservoir 13 ... Liquid return pipe, 14 ... Pump, 15 ... Turbine.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masao Shiraishi, 1-2, Namiki, Tsukuba, Ibaraki Prefecture Institute of Mechanical Engineering, Institute of Industrial Technology (72) Inventor, Mikiyuki Ono, 1-5-1, Kiba, Koto-ku, Tokyo In stock company Fujikura (72) Inventor Masataka Mochizuki 1-5-1, Kiba, Koto-ku, Tokyo Inside stock company Fujikura (72) Inventor Koichi Masuko 1-5-1, Kiba, Koto-ku, Tokyo Fujikura stock company (72) Inventor Yuji Saito 1-5-1 Kiba, Koto-ku, Tokyo Inside Fujikura Stock Company

Claims (1)

[Claims] 1. A working fluid is enclosed in a closed pipe, and an upper portion of the pipe is arranged in a heating portion to serve as an evaporation portion.
In the top heat type thermosiphon used for top heat type by arranging the lower part in the water tank for cooling water, the liquid pool is provided in the inner circumference of the evaporation part at the upper part of the pipe and A pump for supplying the working fluid in the condensing part from the lower end of the pipe through a liquid return pipe is provided, and the turbine and the pump inserted in the liquid feed pipe connected to the water tank are continuously rotated by the rotation of the turbine. A top-heat type thermosiphon, which is characterized in that it is configured to drive a pump.