JP2622592B2 - Top heat type heat pipe - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention transfers heat as latent heat of a working fluid by causing a working fluid sealed in a closed vessel to evaporate and condense and flow inside the closed vessel. The present invention relates to a heat pipe, and particularly to a heat pipe for transferring heat from a high position to a low position.

2. Description of the Related Art As is well known, a non-condensable gas such as air is exhausted from inside a closed vessel such as a heat pipe or a closed pipe,
After that, a condensable fluid such as water or chlorofluorocarbon is sealed as a working fluid, and when heat is applied from the outside, the working fluid inside evaporates, and the steam flows to places with low temperature and pressure to release heat and condense. As a result, the working fluid transports heat as its latent heat. Then, the condensed working fluid is returned to the so-called evaporating section where evaporation is caused by heat from the outside, and as a result, the working fluid continuously repeats evaporation and condensation and returns to the evaporating section, thereby continuously transferring heat. Do. Therefore, in the heat pipe,
The working fluid vapor flows due to the pressure difference inside the closed vessel, but the working fluid in the liquid phase needs to be returned to the evaporating section by some pressure. A wick such as that described above is provided, and the working fluid in the liquid phase is returned to the evaporator by the capillary pressure generated on the surface side. Further, when the thermosiphon is configured to transfer heat only upward, the working fluid in the liquid phase is returned to the evaporating unit at a lower position by gravity.
As a more specific structure, a pump driven by electric power supplied from the outside is arranged inside the sealed container, or a turbine driven by working fluid steam and a pump connected to the turbine are arranged inside the sealed container,
There is conventionally known a configuration in which a working fluid in a liquid phase is forcibly recirculated to an evaporator by these pumps.

Problems to be Solved by the Invention However, when heat is transferred from a high position to a low position by a heat pipe, it is necessary to reflux the working fluid in a liquid phase upward against the gravity inside the heat pipe. However, when the pressure for this purpose is obtained by the capillary pressure in the wick, there is a disadvantage that since the capillary pressure that can be generated is relatively low, the reflux height of the liquid-phase working fluid is low, and the heat transfer distance is short. In addition, in the configuration in which the working fluid in the liquid phase is pumped upward by pumping force instead of the capillary pressure by the wick, the reflux height of the working fluid in the liquid phase can be increased, and the height difference between the high temperature part and the low temperature part is considerable Although heat transfer can be performed, if a pump is provided inside the heat pipe, the configuration is inevitably complicated, and the heat pipe itself must be effective. In the case where the pump is driven by the above power, a special power source is required. Further, if the pump is driven by a turbine built in the heat pipe, a problem that the configuration is further complicated arises.

The present invention has been made in view of the situation of steam, and uses vibration to reliably transfer heat even when the height difference when transferring heat from a high position to a low position is large. It is an object of the present invention to provide a heat pipe having a simple structure.

Means for Solving the Problems To achieve the above object, each invention of this application is
The rotary plate is configured to be rotated upward from a substantially horizontal state by vibrations applied from the outside, so that the liquid-phase working fluid on the upper surface side is caused to fly upward. More specifically, the invention described in claim 1 is a heat pipe in which a working fluid that transports heat as latent heat by performing evaporation and condensation inside a vacuum-evacuated closed container is provided. Attached to a vibrating body that performs vibrations including vertical vibrations, one end of which is arranged in a high-temperature portion at a high position, and the other end is arranged in a low-temperature portion at a low position, and Inside the closed container,
A rotary plate is mounted so as to be rotatable upward from a substantially horizontal state about an axis extending along a substantially horizontal direction.

The invention described in claim 2 is a heat pipe in which a working fluid that transports heat as latent heat by performing evaporation and condensation by enclosing the inside of a vacuum-evacuated closed container is enclosed by at least a vertical vibration. And a vibrator including a vibrator, one end of which is disposed in a high-temperature section at a high position, and the other end is disposed in a low-temperature section at a low position. A slide block having a through hole vertically penetrated therein is movably accommodated in the vertical direction, and the upper end of the slide block is pivoted from a substantially horizontal state to an upward direction about a substantially horizontal axis. A free rotating plate is provided.

Therefore, in the heat pipe according to the first aspect of the present invention, the working fluid inside the closed vessel evaporates on the high-temperature portion located at a high position, and the portion disposed on the low-temperature portion located at a low position, The internal pressure is low, so that the vapor of the working fluid flows downward inside the sealed container, and then releases heat to the low-temperature portion and condenses. Then, the closed container receives vertical vibrations from the vibrating body, so that the rotating plate repeatedly rotates between a substantially horizontal state and an upwardly directed state, and at the same time, the liquid-phase working fluid is sprayed. And splatter upward. As a result, the working fluid is supplied to the upper surface of the turning plate, and the working fluid is caused to fly upwards of the closed container when the turning plate vigorously turns upward. That is, the working fluid is returned to the evaporating section, which is the upper part of the closed vessel, by the rotating plate jumping up the working fluid. Therefore, heat can be transported continuously from the upper part to the lower part.

In the heat pipe according to the second aspect of the present invention, the slide block is flipped up by the vertical vibration of the sealed container, and the rotary plate attached to the slide block is rotated upward. To do
The working fluid placed on the upper surface of the rotating plate is caused to fly to the evaporator, which is the upper part of the closed vessel, and returned to the evaporator. As a result, the heat transport from the upper part to the lower part is continuously performed.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic view showing the principle of an embodiment of the present invention, in which a sealed tube 1 is made of a material having a good thermal conductivity such as copper or stainless steel, and has inside thereof. A condensable fluid such as water or chlorofluorocarbon is sealed as the working fluid 2 in a state where non-condensable gas such as air is removed by vacuum degassing, and is configured as a heat pipe. The sealed tube 1 is vertically arranged on a vibrating body 3 which vibrates in an operating state such as an engine or a joint box of an automobile, and one end of the sealed tube 1 is arranged in a high temperature section 4 at a high position, and an evaporating section is provided. E, and the other end is disposed in the low-temperature section 5 at a lower position to form a condensing section C. On the lower part of the inner surface of the sealed tube 1, a turning plate 6 that is turned from a substantially horizontal state to an upward direction about a substantially horizontal axis is attached. That is, the rotating plate 6 is attached to the inner surface of the sealed tube 1 by the hinge 7, and the stopper 8 supports the free end of the rotating plate 6 in the stopped state from below and supports the rotating plate 6 in a substantially horizontal state. Is attached to a predetermined location on the inner surface of the sealed container 1. The rotating plate 6 is used for splashing the liquid-phase working fluid 2 as will be described later, and is made of a material having a large specific gravity such as copper so as to increase the inertia force. The weight is attached to the opposite part.

Therefore, in the above heat pipe, the temperature is high at the upper end and lower at the lower end, so that the working fluid 2 receives heat from the high temperature section 4 at the upper end of the sealed pipe 1 and evaporates, and the steam is After flowing to the lower end, the heat of the working fluid vapor is released to the low-temperature section 5 and the working fluid vapor condenses. That is, the working fluid 2 transports heat as latent heat from the upper end side to the lower end side. In order to prevent the flow of the working fluid vapor from being hindered, it is preferable to provide the rotating plate 6 with a ventilation structure, or to provide a ventilation passage for bypassing the rotating plate 6 and allowing the working fluid vapor to flow downward. The condensed working fluid 2 accumulates at the lower end of the sealed tube 1.
, And vibrates up and down, so that the liquid-phase working fluid 2 splashes up inside the sealed tube 1 and splashes upward. It turns repeatedly. As a result, the liquid-phase working fluid 2 supplied to the bottom of the sealed tube 1 is placed on the rotating plate 6 little by little, and the rotating plate 6 is rotated upward, so that the operation on the upper surface side is performed. Fluid 2 is caused to fly upward. That is, the working fluid 2 in the liquid phase is converted into the closed
Is returned to the evaporator E, which is the upper end of the evaporator. Then, the working fluid 2 evaporates again due to heat input from the outside, and the steam flows to the condensing section C, thereby transporting heat as latent heat.

FIG. 2 shows an embodiment of the invention described in claim 2;
The example shown here is configured to more effectively utilize the vertical vibrations received by the sealed tube 1. That is, the sealed tube 1
A liquid reservoir 9 is formed along the inner peripheral surface of the upper end of the liquid crystal, and a working fluid 2 in a liquid phase is formed on a portion of the inner peripheral surface of the sealed tube 1 above the liquid reservoir 9 by a capillary pressure of a wire mesh or the like. There is a wick 10 for pumping water. In addition, sealed tube 1
A liquid supply pipe having a lower end opening near the bottom of the sealed tube 1 and an upper end opening facing the liquid reservoir 9 inside
11 are held and arranged by a retainer (not shown) so as to extend in the vertical direction. That is, the liquid supply pipe 11 is bent at the upper end and opened to the liquid reservoir 9.
A slide block 12 made of a material having a specific gravity greater than that of the working fluid 2 is accommodated in a portion of the liquid supply pipe 11 extending upward from the bottom of the sealed pipe 1 so as to be vertically movable. The slide block 12 has a through hole 13 penetrating from the bottom surface to the upper surface, and a rotating plate 14 is attached to the upper surface by a hinge 15 so as to open and close the open end of the through hole 13. Other configurations such as the sealing pipe 1 attached to the vibrating body 3 are the same as those of the heat pipe shown in FIG.

Therefore, in the heat pipe shown in FIG. 2, when heat is input to the evaporating section E from the outside, the working fluid 2 dispersed by the wick 10 evaporates from the liquid reservoir 9 and the vapor has a temperature and It flows to the condensing part C side where the pressure is low, where it radiates heat and condenses. As a result, a liquid pool is formed at the bottom of the sealed tube 1, and in a state where the closed tube 1 is stopped, the slide block 12 is in a state of being immersed in the liquid pool. When the sealed tube 1 vibrates up and down together with the vibrator 3 in this state, the slide block 12 is flipped up and rises inside the liquid supply tube 11. At the same time, the rotating plate 14 attached to the slide block 12 rotates upward as shown by a broken line in FIG. As a result, a part of the liquid-phase working fluid 2 stored at the bottom of the closed pipe 1 is pushed upward inside the liquid supply pipe 11 by the slide block 12 and is caused to fly further upward by the rotating plate 14. . That is, the slide block 12 and the rotating plate 14 pump the liquid-phase working fluid 2 from the bottom of the sealed tube 1 to the liquid reservoir 9 on the side of the evaporating section E. Each time the slide block 12 is flipped up inside the liquid supply pipe 11 due to the vertical vibration of the closed pipe 1, the working fluid 2 condensed by radiating heat passes through the inside of the liquid supply pipe 11, resulting in a liquid storage section Reflux to 9. Therefore, as a whole, the heat pipe continuously transfers heat from the high-temperature portion 4 at a high position to the low-temperature portion 5 at a low position.

Effect of the Invention As described above, in the top heat type heat pipe of the present invention, the action of transporting the heat from the high position to the low position and causing the working fluid in the liquid phase to reflux against the gravity,
Since the rotating plate or the slide block forcibly jumps up the working fluid by the vibration given from the outside, heat transfer in a so-called top heat mode can be performed without requiring any special external power. In addition, the height difference between the high-temperature part and the low-temperature part during the heat transport is a height at which the working fluid in the liquid phase can be recirculated by the rotating plate or the slide block. It is possible to perform heat transfer in a top heat mode with a great difference in height. Further, the heat pipe of the present invention has a simple structure because no drive mechanism such as a pump is provided inside the sealed pipe, and can be manufactured easily and at low cost. Since the rotating plate and the slide block are moved up and down by the vibration of a vibrating body such as an automobile engine, a special driving device is not required. can do.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing in principle one embodiment of the invention described in claim 1, and FIG. 2 is a schematic diagram showing in principle one embodiment of the invention described in claim 2. 1 ... closed tube, 2 ... working fluid, 3 ... vibrating body, 4 ...
High temperature section, 5 low temperature section, 6, 14 rotating plate, 12 slide block, 13 through hole, E evaporation section, C condensation section.

Claims (2)

(57) [Claims] 1. A heat pipe in which a working fluid for transporting heat as latent heat by performing evaporation and condensation by evaporating and condensing inside a vacuum-evacuated closed container is enclosed, wherein the closed container performs vibration including at least vertical vibration. Attached to the vibrating body, one end thereof is disposed in a high-temperature section at a high position, and the other end is disposed in a low-temperature section at a low position. A top heat type heat pipe characterized in that a rotary plate is mounted so as to be rotatable from an almost horizontal state to an upward direction about an axis along the axis. 2. A heat pipe in which a working fluid for transporting heat as latent heat by evaporating and condensing is enclosed in an evacuated closed container, wherein the closed container performs vibration including at least vertical vibration. Attached to the vibrating body, one end thereof is disposed in a high-temperature section at a high position, and the other end is disposed in a low-temperature section at a low position. A rotating block having a through hole formed therein is movably accommodated in a vertical direction, and a rotating plate is provided at the upper end of the sliding block so as to be rotatable upward from a substantially horizontal state about a substantially horizontal axis. The top heat type heat pipe characterized by having a.