Gas-liquid separation type overcharge cable based on phase change cooling liquid

Abstract

The invention discloses a gas-liquid separation type overcharge cable based on phase change cooling liquid, which belongs to the technical field of charging cables and comprises a charging wire, a cooling ring pipe, a liquid inlet pipe and an outer protective sleeve. The periphery of the charging wire is tightly coated with an insulating layer; the cooling ring pipe comprises a cooling inner pipe and a cooling outer pipe; the cooling inner pipe is sleeved outside the insulating layer of the charging wire; a cooling channel is formed between the cooling inner pipe and the cooling outer pipe; a separation structure is arranged in the cooling outer pipe and is used for separating the cooling channel into a gas channel and a liquid channel, so that gas and liquid generated after phase change of the phase change cooling liquid are separated; the outer side of the cooling outer pipe is wrapped with the outer protective sleeve in the circumferential direction, and a cavity is formed between the outer protective sleeve and the outer circumferential wall of the cooling outer pipe. The liquid inlet pipe is used for conveying phase change cooling liquid to the cooling channel through the cavity. According to the invention, the gasification efficiency of the phase change cooling liquid and the heat dissipation effect on the charging wire can be guaranteed, and the situation of local overheating of the charging wire is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of charging cables, and specifically relates to a gas-liquid separation supercharging cable based on phase-change coolant. Background Art

[0002] With the increasing electrification of contemporary society, the demand for power transmission in various fields is becoming increasingly stringent, and various types of equipment are also moving towards high-current operation. Whether it is large-scale production equipment in the industrial field, 5G base stations and data center servers and communications equipment, or rechargeable batteries in the new energy vehicle field, they all have a large demand for high-power power transmission. They all require charging cables that can provide high-power, continuous and stable power supply, which places increasingly high demands on charging cables.

[0003] For example, in the field of industrial production, large industrial electric equipment such as automated cranes and electric forklifts consume huge amounts of electricity during high-intensity operations and require high-power charging to meet the equipment's operating requirements. However, when charging, traditional cables will generate heat due to their own resistance, which in turn affects charging efficiency, resulting in limited charging speed, extended equipment downtime for charging, and reduced production efficiency. In recent years, although liquid cooling technology has been used to dissipate heat from cables, this method generally chooses to enclose liquid cooling pipes on the outside of the charging cable to dissipate heat to improve charging efficiency. However, the coolant currently used is a single-phase coolant, which has relatively low heat dissipation efficiency and is difficult to meet the needs of rapid heat dissipation in high-power charging scenarios. In order to meet the heat dissipation requirements during charging, a larger liquid cooling channel must be designed to achieve a large flow of coolant circulation. This will cause the overall structure of the liquid-cooled charging cable to be bloated and its flexibility to deteriorate, which is not conducive to wiring and operation in actual use.

[0004] Gas-liquid phase change coolant is a coolant that absorbs a large amount of latent heat to dissipate heat by utilizing the phase change of the coolant at a specific temperature. It has the following advantages: First, when the phase change coolant vaporizes near the boiling point, the latent heat absorbed is much greater than the sensible heat absorbed by the liquid when the temperature rises by the same amount. For example, the specific heat capacity of ethylene glycol aqueous solution at 50°C is about 3.65*10 3 J / (kg·℃), while the latent heat of electronic fluoride liquid is 6.9*10 4 J / (kg·℃), which means that in areas where the cable generates a lot of heat, the phase change coolant can quickly absorb the heat and carry it away through phase change, greatly improving the heat dissipation efficiency; secondly, the phase change process occurs in a relatively fixed temperature range, which can minimize the fluctuation of the cable's operating temperature and maintain the cable temperature stable; thirdly, the powerful heat dissipation capacity of the phase change coolant can make the cable design more compact. Compared with single-phase coolant, it can reduce the coolant circulation flow requirements and the size of the coolant channel, making it easier to use in practice.

[0005] However, when using phase-change coolant to dissipate heat for the charging cable, the phase-change coolant will generate gas due to the phase change caused by heat. The gas leaves the liquid surface and gathers at the top of the cooling pipe. However, as the cooling time increases, a gas layer will form on the top of the cooling pipe, hindering the liquid part in the pipe from further changing phase to gas and escaping from the liquid surface, resulting in a slowdown in the gasification rate, and thus reducing the overall heat exchange performance of the phase-change coolant. In order to meet the heat exchange performance, the circulating pump needs to increase the power to promote the flow of coolant, which consumes a lot of energy. In addition, due to the different flow characteristics of gas and liquid, the heat transfer efficiency of the gas phase is much lower than that of the liquid phase. The presence of a gas-liquid mixture will also cause uneven temperature throughout the cable, resulting in local overheating of the cable, further affecting the heat dissipation performance and safety of use. Therefore, there is an urgent need to provide a gas-liquid separation supercharging cable that can solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to address the above-mentioned shortcomings by providing a gas-liquid separation supercharging cable based on phase-change coolant. This is intended to solve the problem that when the phase-change coolant is used to cool the charging cable, the gas-liquid mixture produced by the phase change hinders the liquid from vaporizing, thus affecting the heat dissipation effect of the charging cable and causing local overheating of the charging cable. To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A gas-liquid separation supercharging cable based on phase-change coolant, comprising a charging conductor, a cooling ring tube, a liquid inlet pipe and an outer protective sleeve; the outer circumference of the charging conductor is tightly covered with an insulating layer; the cooling ring tube comprises a cooling inner tube and a cooling outer tube; the cooling inner tube is sleeved on the outer side of the insulating layer of the charging conductor; a cooling channel is formed between the cooling inner tube and the cooling outer tube; a separation structure is provided in the cooling outer tube to separate the cooling channel into a gas channel and a liquid channel, so that the gas and liquid generated after the phase change of the phase-change coolant are separated; the outer protective sleeve is circumferentially wrapped around the outside of the cooling outer tube, and a cavity is formed between the outer protective sleeve and the outer peripheral wall of the cooling outer tube; the liquid inlet pipe is used to transport the phase-change coolant to the cooling channel through the cavity.

[0007] Furthermore, the cooling outer tube includes a first outer tube section and a second outer tube section arranged in sequence and connected along the flow direction of the coolant; the second outer tube section includes a second expanded diameter section and a second diameter section; the cross-section of the second expanded diameter section is a trapezoidal shape that is narrow in front and wide in the back; the inner diameter of the first outer tube section is smaller than the inner diameter of the second diameter section; the separation structure is arranged inside the second outer tube section, so that the cooling channel formed between the cooling inner tube and the second outer tube section is separated into a gas channel and a liquid channel.

[0008] Furthermore, the separation structure includes at least a first partition extending horizontally along the flow direction of the phase change coolant; the first partition is laterally arranged above the interior of the second diameter section to separate the interior of the second diameter section into upper and lower parts, forming a gas channel and a liquid channel located below the gas channel respectively.

[0009] Furthermore, the first separator is provided with a plurality of rectangular gas-liquid separation membranes spaced apart along the length direction.

[0010] Furthermore, the separation structure also includes a second partition; the second partition is laterally arranged above the interior of the second expanded diameter section and extends obliquely upward along the flow direction of the phase change coolant; the end of the second partition is connected to the front end of the first partition, so that the interior of the entire second outer tube section is divided into upper and lower parts, forming a gas channel and a liquid channel located below the gas channel respectively.

[0011] Furthermore, the inclination angle of the second partition is between 10° and 60°.

[0012] Furthermore, the separation structure includes a gas-liquid separation tube and a first gas-liquid separation membrane extending along the flow direction of the phase-change coolant; the gas-liquid separation tube is arranged in the second diameter section and is coaxial with the second diameter section; the inner diameter of the gas-liquid separation tube is larger than the outer diameter of the cooling inner tube and smaller than the inner diameter of the second diameter section; the first gas-liquid separation membrane is a cylindrical gas-liquid separation membrane; one end of the first gas-liquid separation membrane is connected to the inner wall at the entrance of the second expanded diameter section, and the other end is connected to the front end of the gas-liquid separation tube to separate the inside and outside of the second outer tube section to form a relatively sealed gas channel and liquid channel; the gas channel is circumferentially wrapped around the outside of the liquid channel.

[0013] Furthermore, a plurality of second gas-liquid separation membranes are arranged on the gas-liquid separation tube at intervals along the length direction.

[0014] Furthermore, the cooling inner tube and the cooling outer tube are eccentrically arranged; the cooling inner tube is offset downward relative to the axis of the cooling outer tube.

[0015] Furthermore, the liquid inlet pipe is arranged in the cavity; the outlet of the liquid inlet pipe is connected to the inside of the cavity; the cavity is connected to the inlet of the cooling channel; and the outer peripheral wall of the liquid inlet pipe is also covered with a second insulating layer.

[0016] The beneficial effects of the present invention are: 1. The present invention provides a separation structure to separate the cooling channel into a gas channel and a liquid channel, allowing the gas-liquid mixture formed during the heat dissipation process of the phase-change coolant to be separated. This significantly reduces the pressure on the liquid in the liquid channel, ensures the vaporization efficiency of the liquid portion of the phase-change coolant, and thus ensures the cooling effect of the liquid portion on the charging conductor. It also prevents uneven temperatures in different parts of the tube due to the different heat dissipation efficiencies of the gas and liquid phases, thereby avoiding local overheating of the charging conductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the cross-sectional structure of the supercharging cable of the present invention, with the separated structure not shown; Figure 2This is a schematic diagram of the overall structure of the cooling outer tube of the present invention; Figure 3 is a schematic cross-sectional structural diagram of an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of an embodiment of the present invention Figure 1 ; Figure 5 This is a schematic diagram of the structure of an embodiment of the present invention Figure 2 ; Figure 6 is a schematic cross-sectional structural diagram of another embodiment of the present invention; Figure 7 is a structural diagram of another embodiment of the present invention; Figure 8 2 is a schematic diagram of the cross-sectional structure of the supercharging cable of the present invention, wherein the cooling inner tube and the cooling outer tube are eccentrically designed; In the accompanying drawings: 1. Charging wire; 2. Cooling ring pipe; 3. Liquid inlet pipe; 4. Outer protective sleeve; 5. Cooling channel; 6. Cavity; 8. Auxiliary wire; 11. Insulation layer; 21. Cooling inner tube; 22. Cooling outer tube; 51. Gas channel; 52. Liquid channel; 71. First partition; 72. Second partition; 73. Gas-liquid separation tube; 74. First gas-liquid separation membrane; 221. First outer tube section; 222. Second outer tube section; 2221. Second expanded diameter section; 2222. Second diameter section; 711. Rectangular gas-liquid separation membrane; 731. Second gas-liquid separation membrane. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0019] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0020] In the description of the present invention, "plurality" means two or more.

[0021] In the description of the present invention, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features not being in direct contact with each other but being in contact with each other via another feature therebetween.

[0022] In the description of the present invention, “on”, “above” and “above” a first feature of a second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0023] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," and "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.

[0025] Example 1: See attached Figure 1 , Attachment Figure 5A gas-liquid separation supercharging cable based on phase-change coolant comprises a charging conductor 1, a cooling ring tube 2, a liquid inlet pipe 3 and an outer protective sleeve 4; the outer periphery of the charging conductor 1 is tightly covered with an insulating layer 11; the cooling ring tube 2 comprises a cooling inner tube 21 and a cooling outer tube 22; the cooling inner tube 21 is sleeved outside the insulating layer 11 of the charging conductor 1; a cooling channel 5 is formed between the cooling inner tube 21 and the cooling outer tube 22; a separation structure is provided in the cooling outer tube 22 to separate the cooling channel 5 into a gas channel 51 and a liquid channel 52, so that the gas and liquid generated after the phase change coolant change are separated; the outer protective sleeve 4 is circumferentially wrapped around the outer side of the cooling outer tube 22, and a cavity 6 is formed between the outer peripheral wall of the cooling outer tube 22; the liquid inlet pipe 3 is used to transport the phase-change coolant to the cooling channel 5 through the cavity 6. As can be seen from the above structure, the charging conductor 1 is used to connect to the positive or negative pole of an external power source. In actual use, two gas-liquid separation supercharging cables can be used to connect the positive and negative poles of the power source respectively to power the electrical appliances. The outer periphery of the charging conductor 1 is tightly coated with an insulating layer 11, which provides insulation protection for the charging conductor 1. The liquid cooling tube assembly includes two cooling loops 2, each corresponding to the charging conductor 1. The cooling loops 2 are mounted around the outer periphery of the insulating layer 11 of the corresponding charging conductor 1 to dissipate heat for the corresponding charging conductor 1. The cooling loops 2 include an inner cooling tube 21 and an outer cooling tube 22. The outer cooling tube 22 is mounted around the outer periphery of the inner cooling tube 21, and a cooling channel 5 is formed between the outer circumferential wall of the inner cooling tube 21 and the inner circumferential wall of the outer cooling tube 22 for the coolant to pass through. Because the phase change coolant heats up during the heat dissipation process, an endothermic reaction occurs when it reaches near the boiling point and vaporizes, causing the phase change coolant to change from a pure liquid state to a gas-liquid mixed state. The outer cooling tube 22 is equipped with a separation structure, dividing the cooling channel 5 into a gas channel 51 and a liquid channel 52. This structure separates the gas generated by the phase-change coolant after the phase change, allowing the gas accumulated at the top of the outer cooling tube 22 to be discharged outward from the gas channel 51 along the direction of the liquid flow. This significantly reduces the pressure on the liquid in the liquid channel 52, ensuring gasification efficiency and, consequently, the heat dissipation performance of the phase-change coolant. Furthermore, by separating the gas and liquid phases, the charging lead 1 is partially immersed and cooled by the liquid, ensuring uniform heat dissipation across the charging lead 1 and preventing localized overheating. The outer protective sleeve 4 circumferentially wraps around the outer cooling tube 22 and forms a cavity 6 with the outer wall of the cooling tube 22. The liquid inlet pipe 3 is used to deliver the phase-change coolant to the cooling channel 5 through the cavity 6. The outer protective sleeve 4 accommodates and protects the charging lead 1, the cooling ring 2, and the liquid inlet pipe 3. The liquid inlet pipe 3 delivers the phase-change coolant to the cooling channel 5 through the cavity 6. The phase-change coolant first flows into the cavity 6 through the liquid inlet pipe 3 , and then enters the cooling channel 5 through the cavity 6 to dissipate heat from the charging wire 1 .

[0026] The cooling outer tube 22 includes a first outer tube section 221 and a second outer tube section 222, which are arranged in sequence and connected along the flow direction of the coolant. The second outer tube section 222 includes a second expanded diameter section 2221 and a second diameter section 2222. The cross-section of the second expanded diameter section 2221 is a trapezoidal shape that is narrow in front and wide in the back. The inner diameter of the first outer tube section 221 is smaller than the inner diameter of the second diameter section 2222. The separation structure is disposed within the second outer tube section 222, separating the cooling channel 5 formed between the cooling inner tube 21 and the second outer tube section 222 into a gas channel 51 and a liquid channel 52. As can be seen from the above structure, the cooling outer tube 22 includes a first outer tube section 221 and a second outer tube section 222, which are connected to each other and arranged in sequence along the flow direction of the coolant. The second outer tube section 222 includes a second expanded diameter section 2221 and a second diameter section 2222. The length of the first outer tube section 221 is adaptively set based on the actual phase change of the phase-change coolant. After the phase-change coolant flows through the first outer tube section 221 to initially dissipate heat from the charging lead 1, it undergoes a phase change due to heat absorption, generating a gas-liquid mixture. This gas-liquid mixture then expands the diameter of the cooling outer tube 22 as it flows through the second diameter-expanding section 2221. This expansion reduces the flow rate of the gas-liquid mixture, facilitating subsequent gas-liquid separation. When the gas-liquid mixture enters the second diameter section 2222, the cooling channel 5 formed between the cooling inner tube 21 and the second outer tube section 222 is separated by a separation structure into a gas channel 51 and a liquid channel 52. This allows the gas-liquid mixture formed during the heat dissipation process of the phase-change coolant to undergo gas-liquid separation here, with the majority of the gas entering the gas channel 51, significantly reducing the pressure on the liquid in the liquid channel 52 and ensuring the gasification efficiency of the coolant. The charging wire 1 is located in the liquid channel 52 and is always partially immersed and cooled by the liquid, which can ensure the cooling effect and prevent uneven temperature in different parts of the tube due to different heat dissipation efficiencies of the gas phase and the liquid phase, thereby avoiding local overheating.

[0027] Example 2: See attached Figures 1 to 5. Based on the first embodiment, this embodiment provides a separation structure. The separation structure includes at least a first partition 71 extending horizontally along the flow direction of the phase-change coolant; the first partition 71 is transversely arranged above the interior of the second diameter section 2222 to separate the interior of the second diameter section 2222 from top to bottom, forming a gas channel 51 and a liquid channel 52 located below the gas channel 51, respectively. From the above structure, it can be seen that the first partition 71 is transversely arranged above the interior of the second diameter section 2222 to separate the interior of the second diameter section 2222 from top to bottom. When the gas-liquid mixture formed by the phase-change coolant enters the second diameter section 2222, because the gas will gather at the top of the pipe, most of the gas will enter the gas channel 51 formed by the upper surface of the first partition 71 and the outer peripheral wall of the second diameter section 2222, thereby achieving separation from the liquid part flowing into the liquid channel 52 below.

[0028] The first separator 71 is provided with a plurality of rectangular gas-liquid separation membranes 711 spaced apart along its length. As can be seen from the above structure, although the gas-liquid mixture formed by the phase-change coolant undergoes a gas-liquid separation by passing through the first separator 71, the liquid portion of the phase-change coolant in the second diameter section 2222 continues to dissipate heat for the charging conductor 1 and continuously forms gas through phase change. Therefore, a plurality of rectangular gas-liquid separation membranes 711 are spaced apart along the length of the first separator 71. The rectangular gas-liquid separation membranes 711 can be made of a hydrophobic and breathable polymer material membrane. In the direction of phase-change coolant delivery, the gas continuously generated by the phase-change coolant due to heat absorption passes through the rectangular gas-liquid separation membranes 711 and enters the gas channel 51, while the liquid remains in the liquid channel 52 to soak the charging conductor 1. This significantly reduces the impact on the liquid vaporization efficiency of the phase-change coolant and ensures effective heat dissipation.

[0029] The separation structure also includes a second baffle 72; the second baffle 72 is laterally disposed above the interior of the second expanded diameter section 2221 and extends obliquely upward along the flow direction of the phase-change coolant; the end of the second baffle 72 is connected to the front end of the first baffle 71, thereby dividing the interior of the entire second outer tube section 222 into upper and lower sections, forming a gas channel 51 and a liquid channel 52 located below the gas channel 51. As can be seen from the above structure, the end of the second baffle 72 is connected to the front end of the first baffle 71, thereby dividing the interior of the entire second outer tube section 222 into upper and lower sections, forming a gas channel 51 located at the upper portion of the second outer tube section 222 and a liquid channel 52 located at the lower portion of the second outer tube section 222, respectively, for separating the gas and liquid in the gas-liquid mixture. The purpose of the second baffle 72 disposed obliquely upward in the second expanded diameter section 2221 is to guide the gas in the gas-liquid mixture formed by the phase-change coolant into the gas channel 51 formed at the upper portion of the second outer tube section 222.

[0030] The second partition plate 72 has an inclination angle between 10° and 60°. As can be seen from the above structure, the inclination angle of the second partition plate 72 relative to the horizontal plane is between 10° and 60°, and is adjusted based on the actual phase change of the phase-change coolant to ensure effective gas-liquid separation. Specifically, the inclination angle of the second partition plate 72 relative to the horizontal plane can preferably be 15°, 30°, 45°, etc.

[0031] Example 3: See attached Figures 1 and 2 , Attachment Figures 6 and 7 . On the basis of embodiment one, this embodiment also provides another separation structure. The separation structure includes a gas-liquid separation tube 73 and a first gas-liquid separation membrane 74 extending along the flow direction of the phase-change coolant; the gas-liquid separation tube 73 is arranged in the second diameter section 2222 and is coaxial with the second diameter section 2222; the inner diameter of the gas-liquid separation tube 73 is larger than the outer diameter of the cooling inner tube 21 and smaller than the inner diameter of the second diameter section 2222; the first gas-liquid separation membrane 74 is a cylindrical gas-liquid separation membrane; one end of the first gas-liquid separation membrane 74 is connected to the inner wall at the entrance of the second expanded diameter section 2221, and the other end is connected to the front end of the gas-liquid separation tube 73 to separate the inside and outside of the second outer tube section 222 to form a relatively sealed gas channel 51 and liquid channel 52; the gas channel 51 is circumferentially wrapped around the outside of the liquid channel 52. As can be seen from the above structure, the gas-liquid separation tube 73 is coaxially arranged in the second diameter section 2222, and the inner diameter of the gas-liquid separation tube 73 is larger than the outer diameter of the cooling inner tube 21, so that a cooling channel 5 is formed between the cooling inner tube 21 and the second diameter section 2222. The first gas-liquid separation membrane 74 is cylindrical, and the first gas-liquid separation membrane 74 can specifically adopt a hydrophobic and breathable polymer material membrane to allow the gas in the gas-liquid mixture formed by the phase change coolant to pass through. One end of the first gas-liquid separation membrane 74 is connected to the inner wall at the entrance of the second expanded diameter section 2221, and the other end is connected to the front end of the gas-liquid separation tube 73 to separate the inside and outside of the second outer tube section 222, forming a relatively sealed gas channel 51 and liquid channel 52, as shown Figure 7 As shown, the gas channel 51 is circumferentially wrapped around the outside of the liquid channel 52. When the gas-liquid mixture formed by the phase-change coolant enters the second expanded diameter section 2221, it will diffuse into the gas channel 51 through the cylindrical first gas-liquid separation membrane 74, while the liquid portion continues to remain in the liquid channel 52, continuing to soak the charging wire 1 and dissipate heat for it.

[0032] Multiple second gas-liquid separation membranes 731 are spaced apart along the length of the gas-liquid separation tube 73. As can be seen from the above structure, the gas-liquid mixture formed by the phase-change coolant undergoes a gas-liquid separation in the second expanded diameter section 2221 through the first gas-liquid separation membrane 74. However, in the second diameter section 2222, the liquid portion of the phase-change coolant continues to dissipate heat for the charging lead 1 and continuously forms gas through phase change. Therefore, multiple second gas-liquid separation membranes 731 are spaced apart along the length of the gas-liquid separation tube 73. The second gas-liquid separation membranes 731 are also made of a hydrophobic and breathable polymer material. In the direction of phase-change coolant delivery, the gas continuously generated by the phase-change coolant due to heat absorption passes through the second gas-liquid separation membranes 731 and enters the gas channel 51, significantly minimizing the impact on the liquid vaporization efficiency of the phase-change coolant and ensuring effective heat dissipation.

[0033] Example 4: See attached Figures 1 to 8 On the basis of the first embodiment, and taking the separation structure described in any one of the second embodiment or the third embodiment, the following contents are also included: The inner cooling tube 21 and the outer cooling tube 22 are eccentrically arranged; the inner cooling tube 21 is offset downward relative to the axis of the outer cooling tube 22. As can be seen from the above structure, those skilled in the art can arrange the inner cooling tube 21 and the outer cooling tube 22 in a conventional coaxial arrangement. However, since the phase change coolant generates gas during the cooling process, causing the liquid level to drop, the inner cooling tube 21 and the outer cooling tube 22 can be further improved to an eccentric arrangement. Specifically, the inner cooling tube 21 is offset downward along the axis of the outer cooling tube 22. Even if the liquid level drops along the length of the charging conductor 1, the charging conductor 1 can still be immersed in the liquid, thereby maintaining the cooling effect.

[0034] Embodiment 5: See attached Figure 1 . On the basis of embodiment 1, the liquid inlet pipe 3 is arranged in the cavity 6; the outlet of the liquid inlet pipe 3 is connected to the inside of the cavity 6; the cavity 6 is connected to the inlet of the cooling channel 5; the outer wall of the liquid inlet pipe 3 is also covered with a second insulating layer. From the above structure, it can be seen that after the phase-change coolant is cooled by the external cooling device, it first flows into the cavity 6 through the liquid inlet pipe 3, and then enters the inlet of the cooling channel 5 from the cavity 6, supplies phase-change coolant to the inside of the cooling channel 5, soaks the charging wire 1 and dissipates heat. The outer wall of the liquid inlet pipe 3 is also covered with a second insulating layer, which is used to provide insulation protection for the liquid inlet pipe 3.

[0035] Example 6: Based on the first embodiment, preferably, the number of charging conductors 1 within the outer protective sleeve 4 can be changed to two. The two charging conductors 1 serve as the positive and negative power lines, are axially symmetrically arranged within the outer protective sleeve 4, and extend along the extension direction of the outer protective sleeve 4. The outer periphery of each charging conductor 1 is tightly covered with an insulating layer 11, and a cooling loop 2 is sleeved on the outer wall of the insulating layer 11. The two cooling loops 2 are also symmetrically arranged within the outer protective sleeve 4, and the two cooling loops 2 do not contact each other or the outer protective sleeve 4. The separation structure within the cooling loop 2 can specifically adopt the structure described in any of the first to fourth embodiments to ensure the gas-liquid separation effect of the phase change coolant, thereby ensuring the cooling effect on the charging conductor 1. The liquid inlet pipe 3 is arranged within the cavity 6 to supply the phase change coolant to the two cooling channels 5 formed between the two cooling loops 2 and the two charging conductors 1.

[0036] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A gas-liquid separation supercharging cable based on phase-change coolant, characterized by: The invention comprises a charging conductor (1), a cooling ring tube (2), a liquid inlet pipe (3) and an outer protective sleeve (4); the outer periphery of the charging conductor (1) is tightly covered with an insulating layer (11); the cooling ring tube (2) comprises a cooling inner tube (21) and a cooling outer tube (22); the cooling inner tube (21) is sleeved outside the insulating layer (11) of the charging conductor (1); a cooling channel (5) is formed between the cooling inner tube (21) and the cooling outer tube (22); a separation structure is provided in the cooling outer tube (22) for separating the cooling channel (5) into a gas channel (51) and a liquid channel (52), so that the gas and liquid generated after the phase change coolant change are separated; the outer protective sleeve (4) is circumferentially wrapped around the outer side of the cooling outer tube (22) and forms a cavity (6) between the outer peripheral wall of the cooling outer tube (22); the liquid inlet pipe (3) is used to transport the phase change coolant to the cooling channel (5) through the cavity (6).

2. The gas-liquid separation supercharging cable based on phase change coolant according to claim 1 is characterized in that: The cooling outer tube (22) comprises a first outer tube section (221) and a second outer tube section (222) which are arranged in sequence and connected along the flow direction of the cooling liquid; the second outer tube section (222) comprises a second expanded diameter section (2221) and a second diameter section (2222); the cross section of the second expanded diameter section (2221) is a trapezoidal shape with a narrow front and a wide rear; the inner diameter of the first outer tube section (221) is smaller than the inner diameter of the second diameter section (2222); the separation structure is arranged inside the second outer tube section (222) so that the cooling channel (5) formed between the cooling inner tube (21) and the second outer tube section (222) is separated into a gas channel (51) and a liquid channel (52).

3. The gas-liquid separation supercharging cable based on phase change coolant according to claim 2 is characterized in that: The separation structure comprises at least a first partition (71) extending horizontally along the flow direction of the phase-change coolant; the first partition (71) is laterally arranged above the interior of the second diameter section (2222) to separate the interior of the second diameter section (2222) into upper and lower parts, respectively forming a gas channel (51) and a liquid channel (52) located below the gas channel (51).

4. The gas-liquid separation supercharging cable based on phase change coolant according to claim 3 is characterized in that: The first partition (71) is provided with a plurality of rectangular gas-liquid separation membranes (711) spaced apart along the length direction.

5. The gas-liquid separation supercharging cable based on phase change coolant according to claim 4 is characterized in that: The separation structure further includes a second partition (72); the second partition (72) is transversely arranged above the interior of the second expanded diameter section (2221) and extends obliquely upward along the flow direction of the phase-change coolant; the end of the second partition (72) is connected to the front end of the first partition (71), so that the interior of the entire second outer tube section (222) is divided into upper and lower parts, respectively forming a gas channel (51) and a liquid channel (52) located below the gas channel (51).

6. The gas-liquid separation supercharging cable based on phase change coolant according to claim 5 is characterized in that: The inclination angle of the second partition (72) is between 10° and 60°.

7. The gas-liquid separation supercharging cable based on phase change coolant according to claim 2 is characterized in that: The separation structure comprises a gas-liquid separation tube (73) extending along the flow direction of the phase-change cooling liquid and a first gas-liquid separation membrane (74); the gas-liquid separation tube (73) is arranged in the second diameter section (2222) and is coaxial with the second diameter section (2222); the inner diameter of the gas-liquid separation tube (73) is larger than the outer diameter of the cooling inner tube (21) and smaller than the inner diameter of the second diameter section (2222); the first gas-liquid separation membrane (74) is a cylindrical gas-liquid separation membrane; one end of the first gas-liquid separation membrane (74) is connected to the inner wall of the inlet of the second diameter expansion section (2221), and the other end is connected to the front end of the gas-liquid separation tube (73) to separate the inside and outside of the second outer tube section (222) to form a relatively sealed gas channel (51) and liquid channel (52); the gas channel (51) is circumferentially wrapped around the outside of the liquid channel (52).

8. The gas-liquid separation supercharging cable based on phase change coolant according to claim 7 is characterized in that: A plurality of second gas-liquid separation membranes (731) are arranged on the gas-liquid separation tube (73) at intervals along the length direction.

9. The gas-liquid separation supercharging cable based on phase change coolant according to any one of claims 3 to 8, characterized in that: The cooling inner tube (21) and the cooling outer tube (22) are eccentrically arranged; the cooling inner tube (21) is offset downward relative to the axis of the cooling outer tube (22).

10. The gas-liquid separation supercharging cable based on phase change coolant according to claim 1 is characterized in that: The liquid inlet pipe (3) is arranged in the cavity (6); the outlet of the liquid inlet pipe (3) is connected to the interior of the cavity (6); the cavity (6) is connected to the inlet of the cooling channel (5); and the outer peripheral wall of the liquid inlet pipe (3) is also covered with a second insulating layer.

Images