Self-regenerating bridge-type heat pipe and method for manufacturing the same

Abstract

The present invention provides a self-regenerating bridge-type heat pipe and a method for manufacturing the same, which can reduce the filling rate of the working fluid in a sealed channel while suppressing dry-out, and can also be used in high-temperature environments. [Solution] A self-regenerating bridge-type heat pipe 1 is provided, comprising a sealed channel 2 made of any of the metals copper, stainless steel, iron, titanium, nickel, tin, or zinc, or a ceramic, which is folded and extended multiple times between a heating section H and a cooling section C, and a working fluid 3 sealed within the sealed channel 2 that is heated and vaporized in the heating section H and cooled and condensed in the cooling section C, thereby mainly utilizing latent heat to transport heat from the heating section H to the cooling section C. The sealed channel 2 is made with a channel surface 2a manufactured to worsen wettability with the working fluid 3, and a predetermined amount of the working fluid 3 having a boiling point of 100°C or higher in an atmospheric pressure environment is sealed inside.

Description

Technical Field

[0001] The present invention relates to a self-regenerating bridge-type heat pipe capable of transporting heat from a heating section to a cooling section by utilizing the latent heat and sensible heat of a working fluid, and a method for manufacturing the same.

Background Art

[0002] A heat pipe is for transporting heat from a heating section to a cooling section mainly by utilizing the latent heat of a working fluid, and is recently becoming widely popular in industrial equipment and the like due to its high heat transport efficiency and heat responsiveness. A conventional heat pipe usually has a sealed flow path enclosing a working fluid inside, and heat can be transported from the heating section to the cooling section by vaporizing the working fluid in the heating section and condensing it in the cooling section.

[0003] Also, a heat pipe called a self-excited oscillation type heat pipe has a sealed flow path extending in multiple folds between a heating section and a cooling section, and water (distilled water) as a working fluid enclosed inside the sealed flow path moves between the heating section and the cooling section by self-excited oscillation, so an internal structure such as a wick is not required, and a small size and high heat transport can be achieved.

[0004] However, a heat pipe called a self-regenerating bridge-type heat pipe can achieve high heat transport even with a filling rate less than the optimum filling rate (40 to 60 vol%) of the working fluid of a self-excited oscillation type heat pipe. For example, as a self-regenerating bridge-type heat pipe, as disclosed in Patent Document 1, by manufacturing the flow path surface of the sealed flow path to be water-repellent, it is possible to suppress dry-out and reduce the filling rate (volume ratio) of the working fluid with respect to the sealed flow path.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

[0006] However, while the conventional self-regenerating bridge-type heat pipe described above can reduce the filling rate of the working fluid into the sealed channel while suppressing dry-out due to the water-repellent treatment of the channel surface, the sealed channel is made of aluminum, which leads to a significant decrease in strength in high-temperature environments, and thus it cannot be used in high-temperature environments such as 200°C or higher.

[0007] The present invention has been made in view of these circumstances, and aims to provide a self-regenerating bridge-type heat pipe and a method for manufacturing the same that can reduce the filling rate of the working fluid in a sealed channel while suppressing dry-out, and can also be used in high-temperature environments. [Means for solving the problem]

[0008] The invention described in claim 1 is a self-regenerating bridge-type heat pipe comprising a sealed channel made of any metal or ceramic, copper, stainless steel, iron, titanium, nickel, tin, or zinc, which is folded and extended multiple times between a heating section and a cooling section, and a working fluid sealed within the sealed channel that is heated and vaporized in the heating section and cooled and condensed in the cooling section, thereby utilizing latent heat to transport heat from the heating section to the cooling section, wherein the sealed channel is manufactured such that its surface is made to worsen its wettability with the working fluid, and the working fluid has a boiling point of 100°C or higher in an atmospheric pressure environment.

[0009] The invention described in claim 2 is characterized in that, in the self-regenerating bridge-type heat pipe described in claim 1, the sealed flow path is made of a ceramic material which is aluminum nitride, silicon carbide, alumina, silicon nitride, or zirconia.

[0010] The invention described in claim 3 is characterized in that, in the self-regenerating bridge-type heat pipe described in claim 1, the working fluid consists of water, lithium, sodium, potassium, or mercury.

[0011] The invention described in claim 4 is characterized in that, in the self-regenerating bridge-type heat pipe described in claim 1, the working fluid is filled to the sealed flow path at a volume ratio of 3% or more and less than 10%.

[0012] The invention described in claim 5 is characterized in that, in the self-regenerating bridge-type heat pipe described in claim 1, the wettability of the flow channel surface of the sealed flow channel is deteriorated in any of the following steps: flow channel manufacturing step, chemical surface treatment step, or physical surface treatment step.

[0013] The invention described in claim 6 is characterized in that, in the self-regenerating bridge-type heat pipe described in claim 1, the sealed flow path is configured such that its wettability is deteriorated based on evaluation by the contact angle measurement method, the liquid recovery time method, or the liquid removal diameter method.

[0014] The invention described in claim 7 is applied to a power generation device having a nuclear battery that generates heat by the nuclear decay of a radioactive element and a thermoelectric element that can generate electricity due to a temperature difference, in a self-regenerating bridge-type heat pipe described in any one of claims 1 to 6, wherein the heating section absorbs the heat of the thermoelectric element inside the power generation device, and the cooling section is formed outside the power generation device.

[0015] The invention described in claim 8 is characterized in that, in the self-regenerating bridge-type heat pipe described in claim 7, the power generation device is mounted on a space probe or artificial satellite, and the cooling unit is formed on the outside of the space probe or artificial satellite.

[0016] The invention described in claim 9 is a method for manufacturing a self-regenerating bridge-type heat pipe, comprising a sealed channel made of any metal or ceramic, copper, stainless steel, iron, titanium, nickel, tin, or zinc, and extending multiple times in a folded manner between a heating section and a cooling section, and a working fluid sealed within the sealed channel that is heated and vaporized in the heating section and cooled and condensed in the cooling section, thereby utilizing latent heat to transport heat from the heating section to the cooling section, characterized in that the surface of the sealed channel is manufactured to worsen its wettability with the working fluid, and then a predetermined amount of the working fluid having a boiling point of 100°C or higher in an atmospheric pressure environment is sealed inside. [Effects of the Invention]

[0017] According to the invention described in claims 1 and 9, the sealed channel is made of any metal or ceramic material of copper, stainless steel, iron, titanium, nickel, tin, or zinc, and the channel surface is manufactured to worsen wettability with the working fluid. Furthermore, a predetermined amount of working fluid with a boiling point of 100°C or higher in an atmospheric pressure environment is sealed inside. This makes it possible to reduce the filling rate of the working fluid into the sealed channel while suppressing dry-out, and it can also be used in high-temperature environments.

[0018] According to the invention described in claim 2, the sealed channel is made of a ceramic material which is aluminum nitride, silicon carbide, alumina, silicon nitride, or zirconia, so an inexpensive ceramic sealed channel suitable for heat transport can be used.

[0019] According to the invention described in claim 3, since the working fluid consists of water, lithium, sodium, potassium, or mercury, the working fluid can be moved between the heating and cooling sections even in a high-temperature environment, making it possible to use the device in a high-temperature environment.

[0020] According to the invention described in claim 4, the working fluid is filled to a closed channel at a volume ratio of 3% or more and less than 10%, so that the filling ratio of the working fluid to the closed channel can be reduced while suppressing dryout.

[0021] According to the invention described in claim 5, since the wettability of the flow path surface of the sealed flow path is deteriorated in any of the flow path manufacturing process, chemical surface treatment process or physical surface treatment process, it is possible to surely deteriorate the wettability with the working fluid on the flow path surface of the sealed flow path by a general-purpose surface treatment.

[0022] According to the invention described in claim 6, since the wettability of the sealed flow path is deteriorated based on an evaluation by a contact angle measurement method, a liquid recovery time method or a liquid removal diameter method, it is possible to surely make the wettability of the sealed flow path deteriorated by a general-purpose evaluation.

[0023] According to the invention described in claim 7, since the heating part absorbs the heat of the thermoelectric element inside the power generation device and the cooling part is formed outside the power generation device, it is possible to effectively cool the thermoelectric element by the power generation device.

[0024] According to the invention described in claim 8, since the power generation device is mounted on a space exploration vehicle or a satellite and the cooling part is formed outside the space exploration vehicle or the satellite, it is possible to efficiently release the heat transported from the heating part to the cooling part into the external outer space.

Brief Description of Drawings

[0025] [Figure 1] Schematic diagram showing a self-regenerating bridge type heat pipe (one with both ends of the sealed flow path closed) according to an embodiment of the present invention [Figure 2] Schematic diagram showing a self-regenerating bridge type heat pipe (one with both ends of the sealed flow path connected) according to an embodiment of the present invention [Figure 3] Schematic diagram showing a power generation device to which the self-regenerating bridge type heat pipe is applied [Figure 4] Schematic diagram showing a space exploration vehicle or a satellite equipped with a power generation device to which the self-regenerating bridge type heat pipe is applied [Figure 5] Table showing substances used as the working fluid of the self-regenerating bridge type heat pipe [Figure 6]Plan view showing a self-regenerating bridge-type heat pipe used in an experiment to demonstrate the technical advantages of the present invention. [Figure 7] Cross-sectional view along line VII-VII in Figure 6 [Figure 8] Graph showing experimental results (net heat supply - thermal resistance) to demonstrate the technical advantages of the present invention. [Figure 9] Graph showing experimental results (temperature history when using water with a filling rate of 4%) to demonstrate the technical advantages of the present invention. [Figure 10] Graph showing experimental results (temperature history when using water with a filling rate of 6%) to demonstrate the technical advantages of the present invention. [Figure 11] Graph showing experimental results (temperature history when using water with a filling rate of 8%) to demonstrate the technical advantages of the present invention. [Figure 12] Graph showing experimental results (temperature history when using water with a filling rate of 10%) to demonstrate the technical advantages of the present invention. [Modes for carrying out the invention]

[0026] Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. The self-regenerating bridge-type heat pipe 1 according to this embodiment is capable of transporting heat from a heating section to a cooling section using the latent heat and sensible heat (mainly latent heat) of the working fluid. As shown in Figure 1, it comprises a sealed channel 2 that is folded and extended multiple times between the heating section H and the cooling section C, and a working fluid 3 sealed within the sealed channel 2 that is capable of transporting heat from the heating section H to the cooling section C.

[0027] The sealed channel 2 consists of a tubular member formed by bending a metal or ceramic base material, and its interior is a continuous channel capable of holding the working fluid 3 in a sealed state. Furthermore, the sealed channel 2 is depressurized while the working fluid 3 is sealed inside at a predetermined filling rate, so that the working fluid 3 can move between the heating section H and the cooling section C under depressurized conditions. In this embodiment, the sealed channel 2 is closed at both ends, but as shown in Figure 2, it may be configured with both ends connected.

[0028] The sealed channel 2 according to this embodiment is made of any of the following metals: copper (Cu), stainless steel (SUS), iron (Fe), titanium (Ti), nickel (Ni), tin (Sn), or zinc (Zn), or any of the following ceramics: aluminum nitride (AlN), silicon carbide (SiC), alumina (Al2O3), silicon nitride (SiN), or zirconia (ZrO2).

[0029] The working fluid 3 is heated and vaporized in the heating section H (the high-temperature section) and cooled and condensed in the cooling section C (the low-temperature section that is not heated), allowing heat to be transported from the heating section H to the cooling section C mainly using latent heat. That is, as shown in Figure 1, when heat is transported by the self-regenerating bridge-type heat pipe 1, the working fluid 3 inside the sealed flow path 2 becomes two phases: vapor 3c (vaporized working fluid 3) and liquefied working fluid 3. The liquefied working fluid 3 exists in the form of liquid slag 3a (a pool of working fluid 3), bridge 3b (a thin liquid film in the form of liquid slag), or droplet 3d (small droplet-shaped working fluid 3).

[0030] The sealed flow path 2 is divided almost alternately into a flow path where liquid slug 3a is present and a flow path where liquid slug 3a is not present. The bridge 3b regenerated in the heating section H vaporizes (evaporates or boils) by absorbing heat. Due to the pressure difference on both sides of the bridge 3b created by this vaporization, the bridge 3b moves to the cooling section C, accompanied by the surrounding steam 3c. The bridge 3b that has moved to the cooling section C combines with the liquid slug 3a accumulated in the cooling section C, is cooled and releases sensible heat, while the steam 3c that has moved to the cooling section C is cooled and condenses, mainly releasing latent heat.

[0031] Furthermore, in the cooling section C, liquid slag 3a separates as droplets 3d, or cooled vapor 3c condenses to form droplets 3d, and these adhere to the channel surface 2a of the sealed channel 2. Since the channel surface 2a of the sealed channel 2 is manufactured with poor wettability, the droplets 3d repel each other due to surface tension and move from the cooling section C to the heating section H along both the channel surface 2a where liquid slag 3a is present and the channel surface 2a where liquid slag 3a is not present. Then, some of the droplets vaporize during the movement, and the droplets 3d that have moved from both the channel where liquid slag 3a is present and the channel where liquid slag 3a is not present repeatedly combine in the heating section H, regenerating the bridge 3b. By repeating the above process, continuous heat transport is made possible.

[0032] In this embodiment, the sealed channel 2 is manufactured such that its channel surface 2a is made to worsen its wettability with the working fluid 3. Specifically, the sealed channel 2 has its wettability worsened in one of the following processes: channel manufacturing process, chemical surface treatment process (coating, oxidation treatment, or plating, etc.), or physical surface treatment process (sandblasting or plasma treatment, etc.). For example, its wettability is worsened based on evaluation by contact angle measurement method, liquid recovery time method, or liquid removal diameter method.

[0033] Furthermore, the sealed channel 2 according to this embodiment is sealed with a predetermined amount (a small amount relative to the volume of the sealed channel 2) of working fluid 3 having a boiling point of 100°C or higher in an atmospheric pressure environment. Preferably, the filling rate of the working fluid 3 in relation to the sealed channel 2 is 3% or more and less than 10% by volume. As shown in Figure 5, such working fluid 3 is water (H2O), lithium (Li), sodium (Na), potassium (K), naphthalene (C) 10 It is said to consist of H8 or mercury (Hg).

[0034] The self-regenerating bridge-type heat pipe 1 according to this embodiment is made of a base material of any metal such as copper, stainless steel, iron, titanium, nickel, tin, or zinc, or a ceramic, and comprises a sealed channel 2 that is folded and extended multiple times between a heating section H and a cooling section C, and a working fluid 3 that is sealed in the sealed channel 2 and is heated in the heating section H to vaporize and cooled in the cooling section C to condense, thereby transporting heat from the heating section H to the cooling section C mainly using latent heat. The sealed channel 2 is manufactured by first manufacturing the channel surface 2a in such a way that it worsens the wettability with the working fluid 3, and then sealing a predetermined amount of the working fluid, which has a boiling point of 100°C or higher in an atmospheric pressure environment.

[0035] However, the self-regenerating bridge-type heat pipe 1 according to this embodiment can be applied to a power generation device 6 having a nuclear battery F that generates heat through the nuclear decay of a radioactive element and a thermoelectric element G that can generate electricity due to the temperature difference, as shown in Figure 3. In such a power generation device 6, the thermoelectric element G is disposed between the nuclear battery F and the heating section H of the self-regenerating bridge-type heat pipe 1, and electricity can be generated due to the temperature difference between the nuclear battery F and the heating section H.

[0036] In this embodiment, the self-regenerating bridge-type heat pipe 1 has a sealed flow path 2 that spans both the interior 4 and exterior 5 of the power generation device 6, with a heating section H located inside 4 and a cooling section C located outside 5. As a result, the working fluid 3 moves within the sealed flow path 2, absorbing and cooling the heat from the thermoelectric element G heated by the nuclear battery F by the heating section H, and then transporting that heat to the cooling section C outside 5 for heat dissipation.

[0037] Furthermore, as shown in Figure 4, the power generation device 6 equipped with the self-regenerating bridge-type heat pipe 1 can be mounted on a space probe or satellite 7 that can supply power to a power generation system S via a capacitor K. Because heat transfer by the working fluid 3 does not depend on gravity, the self-regenerating bridge-type heat pipe 1 can be used in outer space (a weightless environment). In this way, when the power generation device 6 is installed on a space probe or satellite 7, the cooling section C can be formed on the outside of the space probe or satellite 7, allowing heat to be dissipated into outer space.

[0038] According to the self-regenerating bridge-type heat pipe 1 of this embodiment, the sealed channel 2 is made of a base material of any metal such as copper, stainless steel, iron, titanium, nickel, tin, or zinc, or a ceramic, and the surface of the channel 2a is processed to worsen the wettability with the working fluid 3. Furthermore, a predetermined amount of working fluid 3 with a boiling point of 100°C or higher in an atmospheric pressure environment is sealed inside. This makes it possible to reduce the filling rate of the working fluid 3 into the sealed channel 2 while suppressing dry-out, and it can also be used in high-temperature environments.

[0039] Furthermore, if the sealed channel 2 is made of a ceramic material such as aluminum nitride, silicon carbide, alumina, silicon nitride, or zirconia, an inexpensive ceramic sealed channel 2 suitable for heat transport can be used. In addition, since the working fluid 3 according to this embodiment consists of water, lithium, sodium, potassium, or mercury, the working fluid can be moved between the heating and cooling sections even in high-temperature environments, making it possible to use it in high-temperature environments. In particular, since the filling rate of the working fluid 3 in the sealed channel 2 according to this embodiment is set to 3% or more and less than 10% by volume, it is possible to reduce the filling rate of the working fluid 3 in the sealed channel 2 while suppressing dry-out.

[0040] Furthermore, since the wettability of the sealed channel 2 according to this embodiment is deteriorated in any of the following processes: channel manufacturing process, chemical surface treatment process, or physical surface treatment process, the wettability of the sealed channel 2 can be reliably deteriorated by general surface treatment. Moreover, since the wettability of the sealed channel 2 according to this embodiment is deteriorated based on evaluation by contact angle measurement method, liquid recovery time method, or liquid removal diameter method, the wettability of the sealed channel 2 can be reliably deteriorated by general evaluation.

[0041] However, when applied to a power generation device 6 having a nuclear battery F that generates heat through the nucleus decay of radioactive elements and a thermoelectric element G that can generate electricity due to a temperature difference, the heating section H absorbs the heat from the thermoelectric element G inside the power generation device 6 4, and the cooling section C is formed outside the power generation device 6 5, so that the thermoelectric element G can be effectively cooled by the power generation device 6. In particular, when the power generation device 6 is mounted on a space probe or artificial satellite 7, and the cooling section C is formed on the outside of the space probe or artificial satellite 7, the heat transported from the heating section H to the cooling section C can be efficiently released into the outer space.

[0042] Next, we will describe experimental results demonstrating the technical advantages of the self-regenerating bridge-type heat pipe 1 according to this embodiment. In the experiment, as shown in Figures 6 and 7, a sealed channel 2 was formed by machining a block made of stainless steel with a vertical dimension α = 400 mm, a horizontal dimension β = 48 mm, and a thickness dimension γ = 2 mm. The surface 2a of the sealed channel 2 was then treated with anodizing to worsen its wettability. The sealed channel 2 had a circular cross-section with a diameter of dimension c, and the heating section H and cooling section C accounted for approximately 20% of the total area, while the intermediate insulating section accounted for approximately 60%.

[0043] Furthermore, the air in the sealed channel 2 was discharged to reduce the pressure, and water (distilled water) was sealed into the sealed channel 2 as the working fluid 3. The filling ratio of the working fluid 3 to the sealed channel 2 was set to 10% by volume. The filling ratio (volume ratio FR) of the working fluid 3 can be calculated using the following formula. FR = V / V0 × 100 However, V(mm 3 ) is the volume of the working fluid 3 filled in the sealed channel 2, V0 (mm³). 3 ) is the volume of the flow path in the sealed flow path 2.

[0044] Furthermore, the surface 2a of the sealed channel 2 has been surface-treated (anodized), and as a result, the contact angle is 80° or higher, based on evaluation by the contact angle measurement method.

[0045] Then, the heating section H was heated by a heater, and the relationship between the net heat supply (W) and thermal resistance (K / W) in the working fluid 3 (water) was measured, yielding the results shown in Figure 8. This shows that the thermal resistance (K / W) of the working fluid 3 decreases as the net heat supply (W) increases until the net heat supply reaches 14 (W) (however, it increases slightly at a net heat supply of 21 (W)). The thermal resistance (R) can be calculated using the following formula. R = Q / (Te - Tc) However, Te(°C) is the temperature in the heating section H, and Tc(°C) is the temperature in the cooling section C.

[0046] Next, in the sealed channel 2 according to this embodiment, water (distilled water) with volume ratios of 4, 6, 8, and 10% filling rates was sealed as the working fluid 3, and the temperature of the heating section H (heating section temperature (°C)) and the temperature of the cooling section C (cooling section temperature (°C)) were measured when the heating section H was heated, and experiments were conducted on the temperature history, yielding the results shown in Figures 9 to 12. Specifically, Figure 9 shows the temperature history when water with a volume ratio of 4% filling rate is used, Figure 10 shows the temperature history when water with a volume ratio of 6% filling rate is used, Figure 11 shows the temperature history when water with a volume ratio of 8% filling rate is used, and Figure 12 shows the temperature history when water with a volume ratio of 10% filling rate is used.

[0047] As a result, the heating section temperature and the cooling section temperature remain almost the same regardless of the filling density, indicating that intense heat transport is occurring from the heating section H to the cooling section C. In this experiment, water (distilled water) was sealed as the working fluid 3, but it is expected that a similar temperature history will occur even if other working fluids 3 with a boiling point of 100°C or higher in an atmospheric pressure environment are used.

[0048] Although this embodiment has been described above, the present invention is not limited thereto. For example, other working fluids with a boiling point of less than 100°C in an atmospheric pressure environment may be used as the working fluid 3, or other materials such as metal (excluding aluminum and those with similar high-temperature rigidity) or ceramics may be used as the base material for the sealed channel 2. Furthermore, the sealed channel 2 may have its wettability worsened by other surface manufacturing processes, as long as the wettability of its channel surface 2a with respect to the working fluid 3 is reduced. [Industrial applicability]

[0049] This invention can be applied to other forms as long as they are in the same spirit as the present invention. [Explanation of symbols]

[0050] 1. Self-regenerating bridge-type heat pipe 2 Sealed channel 2a Flow channel surface 3 Working fluid 3a Liquid slag 3b Bridge 3c steam 3D droplet 4 Inside 5 External 6. Power generation equipment 7. Space probes or artificial satellites H heating section C Cooling section F nuclear battery G Thermoelectric element K Capacitor S Power Generation System

Claims

1. The base material is one of the following metals or ceramics: copper, stainless steel, iron, titanium, nickel, tin, or zinc, and it has a sealed channel that is folded and extended multiple times between the heating section and the cooling section. A working fluid, sealed within the aforementioned sealed channel, which is heated in the heating section and vaporized, and then cooled in the cooling section and condensed, thereby utilizing latent heat to transport heat from the heating section to the cooling section, A self-regenerating bridge-type heat pipe equipped with, The sealed channel is characterized in that its channel surface is manufactured to worsen wettability with the working fluid, and the working fluid having a boiling point of 100°C or higher in an atmospheric pressure environment is sealed inside.

2. The self-regenerating bridge-type heat pipe according to claim 1, characterized in that the sealed channel is made of a ceramic material which is one of aluminum nitride, silicon carbide, alumina, silicon nitride, or zirconia.

3. The self-regenerating bridge-type heat pipe according to claim 1, characterized in that the working fluid consists of water, lithium, sodium, potassium, or mercury.

4. The self-regenerating bridge-type heat pipe according to claim 1, characterized in that the working fluid has a filling rate of 3% or more and less than 10% by volume relative to the sealed flow path.

5. The self-regenerating bridge-type heat pipe according to claim 1, characterized in that the wettability of the channel surface of the sealed channel is deteriorated in any of the following steps: channel manufacturing, chemical surface treatment, or physical surface treatment.

6. The self-regenerating bridge-type heat pipe according to claim 1, characterized in that the sealed channel is formed with deteriorated wettability based on evaluation by contact angle measurement method, liquid recovery time method, or liquid removal diameter method.

7. A nuclear battery that generates heat through the nuclear decay of radioactive elements, A thermoelectric element that can generate electricity from a temperature difference, Applicable to power generation equipment having, The self-regenerating bridge-type heat pipe according to any one of claims 1 to 6, characterized in that the heating section absorbs heat from the thermoelectric element inside the power generation device, and the cooling section is formed outside the power generation device.

8. The self-regenerating bridge-type heat pipe according to claim 7, characterized in that the power generation device is mounted on a space probe or artificial satellite, and the cooling unit is formed on the outside of the space probe or artificial satellite.

9. The base material is one of the following metals or ceramics: copper, stainless steel, iron, titanium, nickel, tin, or zinc, and it has a sealed channel that is folded and extended multiple times between the heating section and the cooling section. A working fluid, sealed within the aforementioned sealed channel, which is heated in the heating section and vaporized, and then cooled in the cooling section and condensed, thereby utilizing latent heat to transport heat from the heating section to the cooling section, A method for manufacturing a self-regenerating bridge-type heat pipe, comprising: A method for manufacturing a self-regenerating bridge-type heat pipe, characterized in that the sealed channel surface is manufactured to worsen wettability with the working fluid, and then a predetermined amount of the working fluid having a boiling point of 100°C or higher in an atmospheric pressure environment is sealed inside.

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