JPH0612367Y2 - Two-phase flow heat absorber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a two-phase flow heat absorber used for cooling a spacecraft or equipment installed in a space station.

[Prior Art] Conventionally, as shown in FIGS. 6 to 8, when a device 2 installed in a spacecraft or a space station 1 is cooled, in order to prevent a temperature rise inside the spacecraft or the space station 1. Two-phase flow heat absorber 3
It is considered that the device 2 is cooled by a two-phase flow exhaust heat loop in which a heat medium is circulated between the heat dissipation condenser 4 and the heat dissipation condenser 4.

In the above apparatus, the device 2 is placed on the heat absorbing plate 7 of the two-phase flow heat absorber 3.
A heat generating element such as the like is placed, heat insulating materials 8a and 8b are arranged around the device 2 and the two-phase flow heat absorber 3, and the device 2 is connected to the device 2 through the heat insulating materials 8a and 8b by the frame-shaped reduction fixing device 9. The two-phase flow heat absorber 3 is fixed under pressure, and the condensed and liquefied heat medium is flown into the liquid flow path 10 of the two-phase flow heat absorber 3 from the pipe line 5.

The heat medium permeates the wick material 11 from the liquid flow path 10, travels in the wick material 12 formed in a cauldron shape from the wick material 11 by a capillary phenomenon, and reaches the groove 13 provided on the back surface of the heat absorbing plate 7,
The heat of the device 2 evaporates and vaporizes by cooling the device 2.

The vaporized heat medium flows into the heat radiating condenser 4 from the pipe 6, releases the heat absorbed from the device 2 to the outer space, and then is condensed and liquefied again.

[Problems to be Solved by the Invention] However, since the above-mentioned two-phase flow heat absorber 3 has the projection 15 on the bottom plate 14 for forming the liquid flow path 10, the bottom plate of the two-phase flow heat absorber 3 is formed. It is necessary to provide a groove 16 capable of fitting with the protrusion 15 in the heat insulating material 8b which is in contact with 14, but prevents the condensed and liquefied heat medium flowing in the liquid flow path 10 from absorbing heat other than that of the device 2. For this reason, it is necessary to maintain accuracy so that no gap is created in the fitting portion between the protrusion 15 and the groove 16, and therefore a high processing technique is required when forming the groove 16.

In addition, when the two-phase flow heat absorber 3 is attached and detached for maintenance and inspection, the two-phase flow heat absorber 3 cannot be easily attached and detached because the fitting between the protrusion 15 and the groove 16 is strong.

The present invention solves the above-mentioned problems, and an object of the present invention is to provide a flat two-phase flow heat absorber.

[Means for Solving the Problems] Among the present inventions, the first invention is a hollow-structured flat-plate-like container 19 having a heat absorbing plate 17 on one side and a bottom plate 18 parallel to the heat absorbing plate 17 on the other side. And a liquid flow path partition wall 20 provided inside the container 19 so as to face the three sides of the container 19 in the circumferential direction and contact the heat absorbing plate 17 and the remaining one side of the container 19 of the bottom plate 18, respectively. A liquid flow path 21 extending along three circumferential sides of the container 19 to be formed, the heat absorbing plate 17, the bottom plate 18, and one circumferential side of the container 19 where the liquid flow path 21 is not formed and the liquid flow. Road bulkhead 20
And a pair of vapor flow path partition walls 22 and 22 parallel to the center line of the container 19 provided inside the liquid flow path partition wall 20 so as to contact with
A vapor flow path 23 formed between the heat absorbing plate 17 and the bottom plate 18
From the liquid flow path partition wall 20 to the vapor flow path partition wall, which are arranged at approximately equal intervals so as to contact the heat absorbing plate 17 and the bottom plate 18, in each space surrounded by the liquid flow path partition wall 20 and the vapor flow path partition wall 22. A plurality of bar-shaped wick members 24 extending toward 22, and wick members 29 disposed between adjacent wick members 24, 24 so as to contact the wick members 24, 24 and the bottom plate 18, respectively. ,container
A fluid supply conduit communicating with the fluid passage 21 from the outside of 19
32, and a fluid discharge conduit 33 that communicates from the vapor flow path 23 to the outside of the container 19, and the adjacent wick members 24, 2
Vaporization part 2 formed by 4 and endothermic plate 17 and wick material 29
A plurality of grooves 25 are provided on the heat absorbing plate 17 that forms the top of 7, and a communication port 28 that connects the permeation portion 26 made of the wick material 29 and the fluid flow path 21 is bored in the liquid flow path partition wall 20, The vaporizer 27
A communication hole (30) that communicates with the steam flow path (23) is formed in the steam flow path partition wall (22).

In the second aspect of the present invention, instead of providing the plurality of grooves 25 in the heat absorbing plate 17 forming the top of the vaporizing section 27 in the first aspect, a second portion of the heat absorbing plate 17 is formed in the top of the vaporizing section 27. A wick material 35 having a required thickness is fixed, and the wick material 35 is brought into contact with each of the bar-shaped wick materials 24.

[Operation] Among the present inventions, the first invention is such that when a condensed and liquefied heat medium flows into a liquid flow path formed in a flat plate-like container, the heat medium permeates the wick material and also causes a rod-like shape due to capillary action The inside of the wick material reaches the groove at the top of the vaporizing chamber, evaporates and vaporizes and absorbs heat.

In a second aspect of the present invention, when a condensed and liquefied heat medium is flown into a liquid flow path formed in a flat plate-shaped container, the heat medium permeates the wick material fixed to the bottom plate and causes a capillary phenomenon. It travels inside the wick material in the shape of a wand and penetrates into the wick material fixed to the lower surface of the heat absorbing plate, evaporates and vaporizes and absorbs heat.

Since the device of the present invention is flat, the two-phase flow heat absorber can be easily thermally shielded from the outside without special processing of the heat insulating material.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 show one embodiment of the first invention of the present invention, and the parts denoted by the same reference numerals as those in FIG. 7 represent the same things.

The heat absorbing plate 17 and the bottom plate 18 are arranged in parallel, and the heat absorbing plate 17 and the bottom plate are arranged.
A container 19 having a flat plate shape is formed by hermetically sealing the periphery of the container 18 and a partition wall 20 is provided inside the container 19 to extend on three sides in the circumferential direction to form a liquid flow path 21. A partition wall 22 extending in a direction parallel to the center line of the container 19 is provided in the container to form a steam flow path 23, and the container 19 is provided on the lower surface of the endothermic plate 17 forming the top of the steam flow path 23.
A plate-shaped buffer plate 34 extending along the center line is fixed.

In the space between the liquid flow channel 21 and the vapor flow channel 23, a required number of cauldron-shaped wick materials 24 are inserted so that the top and the base of the wick material 24 can contact the heat absorbing plate 17 and the bottom plate 18, respectively.

The wick material 29 having the required thickness is replaced with the wick material 24 described above.
The bottom plate 18 is fixed to the bottom plate 18 so that it can come into contact with the bottom plate 18, and the permeation part 26 is formed on the bottom plate 18 side, and the vaporization part 27 is formed on the heat absorption plate 17 side. Groove of required shape 25
Provide multiple.

A communication port 28 is opened in the lower part of the partition wall 20 to communicate the liquid flow path 21 and the permeation part 26, and a communication port 30 is opened in the upper part of the partition wall 22 to communicate the vaporization part 27 and the vapor flow path 23. Two-phase flow heat absorber 31
To form.

The liquid flow passage 21 is connected to a liquid supply conduit 32 communicating with a heat radiating condenser outlet (not shown), and the vapor flow passage 23 is connected to a heat radiating condenser inlet (not shown) with a liquid discharge conduit 33.
Connect.

According to the above configuration, as shown in FIG. 4, the two-phase flow heat absorber
A heat generating body such as the device 2 is placed on the heat absorbing plate 17 of 31, the heat insulating materials 8a and 8b are arranged around the device 2 and the two-phase flow heat absorber 3, and the heat insulating material is provided by the frame-shaped pressing down fixing device 9. Device 2 via 8a, 8b
And the two-phase flow heat absorber 31 are pressed and fixed.

Since the bottom plate 18 of the two-phase flow heat absorber 31 is formed flat, it is easy to perform the two-phase flow heat absorber without special processing on the heat insulating material 8b.
31 can be thermally shielded from the outside.

When the equipment 2 is cooled, the condensed liquefied heat medium is supplied to the pipe 32.
It is made to flow into the liquid flow path 21.

The heat medium is pressurized by a pump (not shown), permeates the wick material 29 from the communication port 28, and travels inside the wick material 24 formed in a cauldron shape from the wick material 29 by the capillary phenomenon to the heat absorbing plate 17. It flows into the groove 25 provided.

On the other hand, the heat absorbing plate 17 is heated by the heat of the device 2 that is pressed and fixed to the heat absorbing plate 17, and the heat medium that has flowed into the groove 25 is evaporated and vaporized by absorbing the heat of the device 2.

The vaporized heat medium flows into the vapor flow path 23 through the communication port 30, flows into the heat dissipation condenser (not shown) through the conduit 33, releases the heat absorbed from the device 2 to outer space, and then condenses. Liquefied.

At this time, the buffer plate 34 allows the vaporized heat medium on the left and right to communicate with each other through the communication port 30.
When they flow into the steam flow path 23, they are opposed to each other and are prevented from interfering with each other.

When performing maintenance and inspection of the two-phase flow heat absorber 31, the pressure reduction fixing device 9 is opened, the pressure reduction fixation of the device 2 and the two-phase flow heat absorber 31 is released, and the heat insulating material 8 and the device 2 are moved to The flow heat absorber 31 is removed.

Since the bottom plate 18 of the two-phase flow heat absorber 31 and the upper surface of the heat insulating material 8b are formed flat, the two-phase flow heat absorber 31 can be easily removed.

Further, since the liquid temperature of the condensed and liquefied heat medium flowing in the liquid flow path 21 extending in the three circumferential directions inside the container 19 is lower than the temperature of the evaporated and vaporized heat medium in the vaporization section 27 by a few ten degrees, the container 19 It is possible to reduce heat radiation from the peripheral portion to the outside.

Further, the vaporizing section is added to the condensed and liquefied heat medium flowing in the liquid channel 21.
The heat in 27 can be absorbed through the partition wall 20 to preheat the heat medium to near the saturation temperature.

FIG. 5 shows an embodiment of the second invention of the present invention,
In the figure, the parts denoted by the same reference numerals as in FIGS. 1 to 4 represent the same things.

In this embodiment, a groove 25 is formed on the lower surface of the heat absorbing plate 17 that forms the top of the vaporizing section 27.
Instead of providing the wick material 35, the wick material 35 is fixed to the lower surface of the heat absorbing plate 17, and the lower surface of the wick material 35 is formed in a cauldron shape.
Abut on the top of the.

According to the above-mentioned configuration, the condensed and liquefied heat medium that has penetrated into the wick material 29 advances through the inside of the wick material 24 formed in the shape of a rod from the wick material 29 by the capillary phenomenon, and the wick material 35
Penetrate into.

On the other hand, since the heat absorbing plate is heated as in the first embodiment of the first invention, the heat medium that has penetrated into the wick material 35 is vaporized.

As described above, this embodiment can also achieve the same operation as that of the first embodiment of the invention.

The two-phase flow heat absorber of the present invention is not limited to the above-mentioned embodiment, and is used as a heat dissipation condenser for allowing gas to flow into the vapor flow path of this device and causing liquid to flow out to the liquid flow path. It goes without saying that various modifications such as the above can be made without departing from the scope of the present invention.

[Effects of the Invention] As described above, according to the two-phase flow heat absorber of the present invention,
The following advantageous effects can be achieved.

1) Since the bottom plate of the two-phase flow heat absorber has a flat shape, there is no need to perform special processing on the heat insulating material, and the two-phase flow heat absorber can be easily attached to and detached from the heat insulating material. It is possible to improve the thermal shielding property of the.

2) Since the liquid flow path is provided in the circumferential direction inside the container, the heat radiated from the two-phase flow heat absorber to the outside is reduced by the condensed and liquefied heat medium whose liquid temperature is lower than the temperature in the vaporization chamber flowing through the liquid flow path. can do.

3) The heat absorption function of the heat absorption plate is the main purpose of dissipating heat outside the container, so it is suitable for cooling large equipment and installing a radiator at a remote location.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the first invention of the present invention, FIG. 2 is a view taken along the line II-II in FIG. 1, and FIG. 3 is a view taken along the line III-III in FIG. FIGS. 4 and 5 are sectional views showing the pressure-bonding of the two-phase flow heat absorber of the first invention to the equipment and the heat insulating material, and FIG. 5 is an explanatory view showing an embodiment of the second invention of the invention. , Sixth
FIG. 7 is an explanatory view showing a conventional two-phase flow heat absorber, FIG. 7 is a cross-sectional view showing the pressure-bonding of the conventional two-phase flow heat absorber and equipment and heat insulating material, and FIG. It is a circuit diagram of the cooling device of the equipment installed in the existing space station. In the figure, 17 is a heat absorbing plate, 18 is a bottom plate, 19 is a container, 20 is a fluid channel partition, 21 is a fluid channel, 22 is a vapor channel partition, 23 is a vapor channel, and 24, 29 and 35 are wick materials. Reference numeral 25 is a groove, 26 is a permeation portion, 27 is a vaporization portion, 28 and 30 are communication ports, 29 is a wick material, 32 is a fluid supply pipeline, and 33 is a fluid discharge pipeline.

Claims (2)

[Scope of utility model registration request] 1. A heat absorbing plate (17) on one side and the heat absorbing plate (1) on the other side.
A hollow-structured plate-like container (19) having a bottom plate (18) parallel to 7), and the heat absorbing plate (17) and the bottom plate (18) facing the three sides in the circumferential direction of the container (19). ) The liquid flow path partition wall provided in the container (19) so as to contact the remaining one side of the container (19).
A liquid channel (21) extending along the three circumferential sides of the container (19) formed by (20), the heat absorbing plate (17), the bottom plate (18), and the liquid channel of the container (19). 1 in the circumferential direction where (21) is not formed
A pair of vapor channel partition walls (22), (22), which are parallel to the center line of the container (19) provided inside the liquid channel partition wall (20) so as to contact the sides and the liquid channel partition wall (20), respectively. 22) Steam flow path formed between
(23), the heat absorbing plate (17), the bottom plate (18), and the liquid flow path partition (2
0) and the vapor flow path partition wall (22) in each space surrounded by the liquid flow path partition wall (20) so as to abut the heat absorption plate (17) and the bottom plate (18) A plurality of bar-shaped wick materials (24) extending toward the vapor flow path partition wall (22), and the wick materials (24), (24) and the bottom plate between the adjacent wick materials (24), (24). (1
8) Wick material (2
9), a fluid supply conduit (32) communicating from the outside of the container (19) to the fluid flow path (21), and the vapor flow path (23) to the container (1
9) a fluid discharge conduit (33) communicating with the outside, and a vaporization section formed by the adjacent wick members (24), (24), the heat absorbing plate (17) and the wick member (29). A plurality of grooves (25) are provided in the heat absorbing plate (17) forming the top of (27), and a communication port that connects the permeation part (26) made of the wick material (29) and the fluid flow path (21).
(28) is formed in the liquid channel partition (20), and the communication port (30) for communicating the vaporization section (27) and the vapor channel (23) is provided with the vapor channel partition (2).
A two-phase flow heat absorber characterized by being provided in 2). 2. The two-phase flow heat absorber according to claim 1, wherein a plurality of grooves (25) are formed in the heat absorbing plate (17) forming the top of the vaporizing part (27).
Instead of providing the heat absorbing plate (17), a wick material (35) having a required thickness is fixed to a portion forming the top of the vaporizing part (27) of the heat absorbing plate (17), and the wick material (35) is formed into a bar-shaped wick material. A two-phase flow heat absorber characterized by being brought into contact with each of (24).