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 low-temperature environments below 0°C. [Solution] A self-regenerating bridge-type heat pipe 1 comprises a sealed channel 2 made of a metal or ceramic base material, which is folded and extended multiple times between a heating section H and a cooling section C, and a working fluid 3 sealed in a predetermined amount within the sealed channel 2, which 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 applying a process to the channel surface 2a that worsens the wettability with the working fluid 3, and the working fluid 3 has a freezing point of less than 0°C in an atmospheric pressure environment.

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 has been recently widely used in industrial equipment and the like due to its high heat transport efficiency and high heat responsiveness. A conventional heat pipe usually has a sealed flow path in which a working fluid is enclosed, 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] In addition, a heat pipe called a self-excited vibration type heat pipe has a sealed flow path that is folded back and extended a plurality of times between a heating section and a cooling section, and water (distilled water) as a working fluid enclosed in the sealed flow path moves between the heating section and the cooling section by self-excited vibration, 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 the self-excited vibration 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 dryout 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 manufacturing of the channel surface of the sealed channel, it has the problem that water, which has a freezing point of 0°C at atmospheric pressure, is sealed as the working fluid, so the water freezes at 0°C and it cannot be used in low-temperature environments below 0°C.

[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 low-temperature environments below 0°C. [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 a metal or ceramic base material, 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 sealed within it has a freezing point of less than 0°C 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 any of the following metals as a base material: aluminum, copper, stainless steel, iron, titanium, nickel, tin, or zinc.

[0010] The invention described in claim 3 is a self-regenerating bridge-type heat pipe described in claim 1, characterized in that the sealed flow path is made of a ceramic material which is aluminum nitride, silicon carbide, alumina, silicon nitride, or zirconia.

[0011] The invention described in claim 4 is a self-regenerating bridge-type heat pipe described in claim 1, characterized in that the working fluid consists of helium, nitrogen, neon, ammonia, methanol, ethanol, acetone, a predetermined refrigerant, or a fluorine-based specialized fluid.

[0012] The invention described in claim 5 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%.

[0013] The invention described in claim 6 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.

[0014] The invention described in claim 7 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.

[0015] The invention described in claim 8 is applied to a cooling device having a self-regenerating bridge-type heat pipe according to any one of claims 1 to 7, and comprising a cooler for housing a desired object to be cooled and a coolant for housing a coolant that can be cooled, wherein the heating section is formed in the cooler for housing and the cooling section is formed in the coolant for housing.

[0016] The invention described in claim 9 is characterized in that, in the self-regenerating bridge-type heat pipe described in claim 8, the cooler and coolant compartments of the cooling device are mounted on an electric vehicle, and the cooler and coolant compartments each have separate doors.

[0017] The invention described in claim 10 is a method for manufacturing a self-regenerating bridge-type heat pipe, comprising a sealed channel made of a metal or ceramic base material, 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, 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 freezing point of less than 0°C in an atmospheric pressure environment is sealed inside. [Effects of the Invention]

[0018] According to the invention described in claims 1 and 10, the sealed channel is manufactured such that the channel surface is made to worsen wettability with the working fluid, and a working fluid with a freezing point below 0°C 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 dryout, and it can also be used in low-temperature environments below 0°C.

[0019] According to the invention described in claim 2, since the sealed channel is made of any of the following metals as a base material, an inexpensive sealed channel made of metal suitable for heat transport can be used.

[0020] According to the invention described in claim 3, 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.

[0021] According to the invention described in claim 4, the working fluid consists of helium, nitrogen, neon, ammonia, methanol, ethanol, acetone, a predetermined refrigerant, or a fluorine-based specialized fluid, so that heat can be transported without the working fluid freezing even in low-temperature environments below 0°C.

[0022] According to the invention described in claim 5, since the filling rate of the working fluid with respect to the sealed flow path is 3% or more and less than 10% in terms of volume ratio, it is possible to reduce the filling rate of the working fluid with respect to the sealed flow path while suppressing dryout.

[0023] According to the invention described in claim 6, 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 general-purpose surface treatment.

[0024] According to the invention described in claim 7, since the sealed flow path is made to have deteriorated wettability based on evaluation by the contact angle measurement method, liquid recovery time method or liquid removal diameter method, it is possible to surely make the wettability of the sealed flow path deteriorated by general-purpose evaluation.

[0025] According to the invention described in claim 8, it is applied to a cooling device having a cold storage for accommodating a desired object to be cryopreserved and a coolant storage for accommodating a coolant that can be cooled. The heating part is formed in the cold storage, and the cooling part is formed in the coolant storage. Therefore, it is possible to effectively cool the object to be cryopreserved by the cooling device.

[0026] According to the invention described in claim 9, the cold storage and the coolant storage of the cooling device are mounted on an electric vehicle, and the cold storage and the coolant storage are each formed with a separate door. Therefore, when the door of the coolant storage is opened and closed to replace the coolant, it is possible to maintain the closed state of the door of the cold storage and suppress the temperature in the cold storage from decreasing.

Brief Description of the Drawings

[0027] [Figure 1] Schematic diagram showing a self-regenerating bridge type heat pipe (a type in which both ends of a sealed flow path are closed) according to an embodiment of the present invention [Figure 2] Schematic diagram showing a self-regenerating bridge type heat pipe (a type in which both ends of a sealed flow path are connected) according to an embodiment of the present invention [Figure 3]A schematic diagram showing a cooling system to which the self-regenerating bridge-type heat pipe is applied. [Figure 4] A schematic diagram showing an electric vehicle equipped with a cooling system to which the self-regenerating bridge-type heat pipe is applied. [Figure 5] Table showing the substances used as working fluids in 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 ethanol) to demonstrate the technical superiority of the present invention. [Figure 10] 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 11] 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 12] 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 13] 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]

[0028] 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.

[0029] 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.

[0030] The sealed channel 2 according to this embodiment is made of any of the following metals: aluminum (Al), 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).

[0031] 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).

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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 freezing point of less than 0°C 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 consists of helium (He), nitrogen (N2), neon (Ne), ammonia (NH3), methanol (CH3OH), ethanol (C2H5OH), acetone (C3H6O), a predetermined refrigerant (tetrafluoromethane, dichlorodifluoromethane, tetrafluoroethane, dichlorotrifluoroethane, trichlorotrifluoroethane), or a specialized fluorinate fluid.

[0036] The self-regenerating bridge-type heat pipe 1 according to this embodiment comprises a sealed channel 2 made of a metal or ceramic base material and extended in multiple folds 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 transporting heat from the heating section H to the cooling section C mainly using latent heat. The sealed channel 2 is manufactured by first applying a manufacturing process to the channel surface 2a that worsens its wettability with the working fluid 3, and then sealing a predetermined amount of the working fluid 3, which has a freezing point of less than 0°C in an atmospheric pressure environment.

[0037] However, the self-regenerating bridge-type heat pipe 1 according to this embodiment can be applied to a cooling device 6 having a cooler 4 for housing a desired object to be cooled W and a coolant storage 5 for housing a heat-dissipating coolant R, as shown in Figure 3. In such a cooling device 6, a door D1 is formed in the cooler 4 for loading and unloading the object to be cooled W, and a door D2 is formed in the coolant storage 5 for loading and unloading the coolant R.

[0038] In this embodiment, the self-regenerating bridge-type heat pipe 1 has its sealed flow path 2 arranged horizontally or in a similar manner, spanning the cold storage compartment 4 and the coolant compartment 5, with a heating section H located in the cold storage compartment 4 and a cooling section C located in the coolant compartment 5. Since the heat transfer by the working fluid 3 does not depend on gravity, the self-regenerating bridge-type heat pipe 1 can be arranged horizontally in the flow path direction. As a result, the working fluid 3 moves within the sealed flow path 2, absorbing heat from the object to be cooled W by the heating section H in the cold storage compartment 4 and then transporting that heat to the cooling section C in the coolant compartment 5 for cooling by the coolant R.

[0039] Furthermore, the cooling device 6 equipped with the self-regenerating bridge-type heat pipe 1 as described above can be mounted on an electric vehicle 7, as shown in Figure 4. When the cooling device 6 is installed on the electric vehicle 7 in this way, the door D1 of the refrigerated storage compartment 4 can be placed outside the electric vehicle 7, while the door D2 of the coolant storage compartment 5 can be placed inside the electric vehicle 7, allowing the items to be kept cool W inside the refrigerated storage compartment 4 to be loaded and unloaded from outside the vehicle.

[0040] According to the self-regenerating bridge-type heat pipe 1 of this embodiment, the surface of the sealed channel 2 is manufactured to worsen the wettability with the working fluid 3, and the working fluid 3, which has a freezing point of less than 0°C 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 low-temperature environments below 0°C.

[0041] Furthermore, if the sealed channel 2 is made of any of the following metals as its base material, an inexpensive metal sealed channel 2 suitable for heat transport can be used. In addition, if the sealed channel 2 is made of any of the following ceramics as its base material, an inexpensive ceramic sealed channel 2 suitable for heat transport can be used.

[0042] In addition, since the working fluid 3 according to this embodiment consists of helium, nitrogen, neon, ammonia, methanol, ethanol, acetone, a predetermined refrigerant, or a fluorine-based specialized fluid, the working fluid 3 can transport heat without freezing even in low-temperature environments below 0°C. 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.

[0043] 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.

[0044] However, when applied to a cooling device 6 having a refrigerator 4 for housing the desired object to be cooled W and a coolant storage 5 for housing a heat-dissipating coolant R, the heating section H is formed in the refrigerator 4 and the cooling section C is formed in the coolant storage 5, so that the cooling device 6 can effectively cool the object to be cooled W. In particular, the refrigerator 4 and coolant storage 5 of the cooling device 6 are mounted on an electric vehicle 7, and the refrigerator 4 and coolant storage 5 each have separate doors (D1 and D2), so when opening and closing the door D2 of the coolant storage 5 to replace the coolant R, the closed state of the door D1 of the refrigerator 4 can be maintained, and a drop in temperature inside the refrigerator 4 can be suppressed.

[0045] 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 an aluminum block 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 rectangular cross-section consisting of a square with dimension a = 1.26 mm, 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%.

[0046] Furthermore, the air in the sealed channel 2 was discharged to reduce the pressure, and water (distilled water), ethanol, acetone, or butanol (1-butanol) was sealed into the sealed channel 2 as the working fluid 3. The filling ratio of the working fluid 3 in the sealed channel 2 was set to 3-10% water and 10% other substances by volume. The filling ratio (volume ratio FR) of the working fluid 3 is 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.

[0047] Furthermore, the surface 2a of the sealed channel 2 is surface-treated (anodized), and as a result, based on evaluation by the contact angle measurement method, the contact angle for water is 80° or more.

[0048] Then, the heating section H was heated by a heater, and the relationship between the net heat supply (W) and thermal resistance (K / W) for each working fluid 3 was measured, yielding the results shown in Figure 8. This shows that for all working fluids 3, the thermal resistance (K / W) gradually decreases as the net heat supply (W) increases. 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.

[0049] Next, in the sealed channel 2 according to this embodiment, ethanol with a volume ratio of 10% 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 the temperature history was experimented on, yielding the results shown in Figure 9. From this, it can be seen that the heating section temperature and the cooling section temperature remained at almost the same temperature, indicating that intense heat transport is occurring from the heating section H to the cooling section C. Furthermore, according to Figure 9, it can be seen that the temperature difference between the heating section H and the cooling section C was 1.3K after 10,000 seconds of experimental time.

[0050] 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 10 to 13. Specifically, Figure 10 shows the temperature history when water with a volume ratio of 4% filling rate was used, Figure 11 shows the temperature history when water with a volume ratio of 6% filling rate was used, Figure 12 shows the temperature history when water with a volume ratio of 8% filling rate was used, and Figure 13 shows the temperature history when water with a volume ratio of 10% filling rate was used.

[0051] 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 freezing point below 0°C in an atmospheric pressure environment are used.

[0052] Although this embodiment has been described above, the present invention is not limited thereto. For example, other working fluids with a freezing point below 0°C in an atmospheric pressure environment may be used as the working fluid 3, or other materials such as metal or ceramic 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]

[0053] This invention can be applied to other forms as long as they are in the same spirit as the present invention. [Explanation of Symbols]

[0054] 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. Cooler 5 Coolant storage 6 Cooling device 7 Electric Vehicles H heating section C Cooling section W Items to be kept cold R Coolant Doors D1 and D2

Claims

1. A sealed channel made of metal or ceramic as the base material, which 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, which has a freezing point below 0°C 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 flow path is made of any of the following metals as a base material: aluminum, copper, stainless steel, iron, titanium, nickel, tin, or zinc.

3. 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.

4. The self-regenerating bridge-type heat pipe according to claim 1, characterized in that the working fluid consists of helium, nitrogen, neon, ammonia, methanol, ethanol, acetone, a predetermined refrigerant, or a fluorine-based specialized fluid.

5. 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.

6. 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.

7. 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.

8. A refrigerator for storing the desired items to be kept cold, A coolant storage compartment for containing a coolant that can be cooled, Applicable to cooling devices having, The self-regenerating bridge-type heat pipe according to any one of claims 1 to 7, characterized in that the heating section is formed in the cooler and the cooling section is formed in the coolant section.

9. The self-regenerating bridge-type heat pipe according to claim 8, characterized in that the cooler and coolant compartments of the cooling device are mounted on an electric vehicle, and the cooler and coolant compartments each have separate doors.

10. A sealed channel made of metal or ceramic as the base material, which 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 the wettability with the working fluid, and then a predetermined amount of the working fluid having a freezing point of less than 0°C in an atmospheric pressure environment is sealed inside.

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