Liquid cooling cable

Abstract

The present invention is a liquid-cooled cable, comprising a liquid-cooling channel and at least one group of wire cores with a fan-shaped cross section, wherein the liquid-cooling channel comprises an inner liquid-cooling channel and an outer liquid-cooling channel, and at least one group of connecting channels, wherein the outer liquid-cooling channel is connected to the inner liquid-cooling channel through the connecting channel, and a cooling medium flows inside the liquid-cooling channel; the wire cores are arranged at the outer periphery of the inner liquid-cooling channel and the inner periphery of the outer liquid-cooling channel, and the connecting channel is arranged in the radial direction of the liquid-cooled cable and separates each of the wire cores. The present invention adds liquid-cooling channels inside and outside the wire cores to ensure the cooling effect of the cable to the greatest extent, thereby improving the current-carrying capacity and service life of the cable.

Description

Technical Field

[0001] The present invention relates to the field of cable technology, and in particular to a liquid cooling cable. Background Art

[0002] Cables generally include conductors, insulation, and sheaths. When transmitting current, the conductor will generate heat due to its own resistance. At present, the charging speed of new energy vehicles is slow. Using high-power charging to increase the charging speed is the future development trend. The greater the power, the greater the heat of the cable itself. Increasing the wire diameter will increase the weight of the cable. In addition, long-term use will accelerate the aging of the cable and affect the service life of the cable.

[0003] Therefore, the inventor, relying on many years of experience and practice in related industries, proposes a liquid cooling cable to overcome the defects of the prior art. Summary of the invention

[0004] The purpose of the present invention is to provide a liquid-cooled cable to overcome the problems existing in the prior art. The present invention adds liquid cooling channels inside and outside the wire core to ensure the cooling effect of the cable to the greatest extent, thereby improving the current carrying capacity of the cable, reducing the weight of the cable and extending the service life of the cable.

[0005] The objective of the present invention is achieved in this way. A liquid-cooled cable comprises a liquid-cooling channel and at least one group of wire cores with a fan-shaped cross-section, wherein the liquid-cooling channel comprises an inner liquid-cooling channel and an outer liquid-cooling channel, and at least one group of connecting channels, wherein the outer liquid-cooling channel is connected to the inner liquid-cooling channel through the connecting channel, and a cooling medium flows inside the liquid-cooling channel; the wire cores are arranged on the outer periphery of the inner liquid-cooling channel and the inner periphery of the outer liquid-cooling channel, and the connecting channel is arranged in the radial direction of the liquid-cooling cable and separates the wire cores.

[0006] In a preferred embodiment of the present invention, the external liquid cooling channel includes a first tube body and a second tube body; the first tube body is sleeved on the outside of the second tube body; the external liquid cooling channel also includes at least one first supporting structure, and the first supporting structure connects the inner wall of the first tube body and the outer wall of the second tube body.

[0007] In a preferred embodiment of the present invention, each of the connecting channels has a first conducting hole and a second conducting hole at both ends, the first conducting hole is arranged through the tube wall of the second tube body, and the second conducting hole is arranged through the tube wall of the inner liquid cooling channel.

[0008] In a preferred embodiment of the present invention, each of the first supporting structures is a plurality of groups of columnar structures; and / or each of the first supporting structures is a strip-shaped plate-like body, and the strip-shaped plate-like body is provided with through holes.

[0009] In a preferred embodiment of the present invention, each of the connecting channels has two sets of side walls, and the two sets of side walls are arranged in a manner of rotating around the central axis of the inner liquid cooling channel; or, the two sets of side walls are arranged in a manner parallel to the central axis of the inner liquid cooling channel.

[0010] In a preferred embodiment of the present invention, at least one of the wire cores is sheathed with an insulating layer.

[0011] In a preferred embodiment of the present invention, a plurality of the wire cores are arranged along the radial direction of the liquid-cooling cable.

[0012] In a preferred embodiment of the present invention, the liquid cooling cable further comprises an outer sheath layer, and the outer sheath layer is arranged at the outermost periphery of the liquid cooling cable.

[0013] In a preferred embodiment of the present invention, the liquid-cooled cable also includes a shielding structure, and the shielding structure is sheathed on the outer periphery of the first tube body; and / or, at least one of the wire cores is sheathed with an insulating layer, and at least one of the insulating layers is sheathed with the shielding structure.

[0014] In a preferred embodiment of the present invention, the liquid cooling cable further comprises an inner sheath, the inner sheath is sheathed on the outer circumference of the first tube body, and the shielding structure is sheathed on the outer circumference of the inner sheath.

[0015] In a preferred embodiment of the present invention, the internal liquid cooling channel also includes at least one group of second supporting structures, the second supporting structures support and connect the inner wall of the internal liquid cooling channel, the second supporting structure is a strip-shaped plate-like body, and a plurality of groups of through holes are arranged on the strip-shaped plate-like body; and / or the second supporting structure is a plurality of groups of columnar structures.

[0016] In a preferred embodiment of the present invention, the ratio of the sum of the inner cavity cross-sectional area of ​​the inner liquid-cooling channel and the wire core cross-sectional area is 2% to 60%.

[0017] In a preferred embodiment of the present invention, the ratio of the sum of the inner cavity cross-sectional area of ​​the external liquid-cooling channel and the wire core cross-sectional area is 2% to 60%.

[0018] In a preferred embodiment of the present invention, the ratio of the distance between the two side walls of the connecting channel to the circumference of the inner liquid-cooling channel is 5% to 45%.

[0019] In a preferred embodiment of the present invention, the ratio of the total circumferential width of the first support structure to the circumference of the external liquid-cooling channel is 4% to 54%.

[0020] In a preferred embodiment of the present invention, the ratio of the total circumferential width of the second support structure to the inner diameter of the inner liquid-cooling channel is 3% to 20%.

[0021] In a preferred embodiment of the present invention, a liquid cooling circulation pump is further included, wherein the liquid cooling circulation pump is connected to the liquid cooling channel via a connecting pipe, and the liquid cooling circulation pump is used to circulate and cool the cooling medium in the liquid cooling channel.

[0022] As described above, the liquid cooling cable of the present invention has the following beneficial effects:

[0023] 1. In the liquid-cooled cable provided by the present invention, liquid cooling channels are added inside and outside the core to ensure the cooling effect of the cable to the greatest extent, thereby improving the current carrying capacity and service life of the cable; the outer sheath layer can effectively protect its internal structure;

[0024] 2. In the liquid-cooled cable provided by the present invention, the wire core is arranged into a fan-shaped shape, and each fan-shaped wire core is arranged around the outer wall of the circular inner liquid-cooling channel. Compared with arranging the circular wire core of the same cross-sectional area around the outer wall of the inner liquid-cooling channel, the cable diameter obtained by arranging the fan-shaped wire core around the outer wall of the circular inner liquid-cooling channel is smaller, which is convenient for miniaturized production of the cable, reduces the weight of the cable, facilitates storage management, and moves the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0026] Figure 1 : It is a cross-sectional schematic diagram when the outer periphery of each core of the liquid-cooled cable of the present invention is covered with an insulating layer and a shielding structure, and an inner sheath, a shielding structure and an outer sheath layer are arranged on the outer side of the external liquid cooling channel.

[0027] Figure 2 : It is a cross-sectional schematic diagram of the liquid-cooled cable of the present invention in which an insulating layer and a shielding structure are coated on the outer periphery of each wire core, and a shielding structure and an outer sheath layer are arranged on the outer side of the external liquid cooling channel.

[0028] Figure 3 : It is a cross-sectional schematic diagram of the liquid-cooled cable of the present invention when an insulating layer is coated on the outer periphery of the wire core, and a shielding structure and an outer sheath layer are arranged on the outer side of the external liquid cooling channel.

[0029] Figure 4 : It is a cross-sectional schematic diagram when the outer periphery of the core of the liquid-cooled cable of the present invention is covered with an insulating layer and an inner sheath, a shielding structure and an outer sheath layer are arranged on the outer side of the external liquid cooling channel.

[0030] Figure 5 : It is a cross-sectional schematic diagram when the outer periphery of each core of the liquid-cooled cable of the present invention is covered with an insulating layer and a shielding structure and an outer sheath layer is arranged on the outer side of the external liquid cooling channel.

[0031] Figure 6: It is a cross-sectional schematic diagram of a liquid-cooled cable of the present invention in which an insulating layer and a shielding structure are coated on the outer periphery of a core and an inner sheath, a shielding structure and an outer sheath layer are arranged on the outer side of an external liquid cooling channel.

[0032] Figure 7 : It is a cross-sectional schematic diagram of a liquid-cooled cable of the present invention in which an insulating layer and a shielding structure are coated on the outer periphery of a core and a shielding structure and an outer sheath layer are arranged on the outer side of an external liquid cooling channel.

[0033] Figure 8 : It is a cross-sectional schematic diagram when multiple cores of the liquid-cooled cable of the present invention are arranged along the radial direction of the liquid-cooled cable and an inner sheath, a shielding structure and an outer sheath layer are arranged on the outer side of the outer liquid cooling channel.

[0034] Fig. 9 : It is a cross-sectional schematic diagram when each core of the liquid-cooled cable of the present invention is in a semicircular sector shape and an inner sheath, a shielding structure and an outer sheath layer are arranged on the outer side of the outer liquid cooling channel.

[0035] Fig.10 : It is a cross-sectional schematic diagram of the liquid-cooled cable of the present invention comprising a wire core and an inner sheath, a shielding structure and an outer sheath layer are arranged on the outer side of the outer liquid cooling channel.

[0036] Fig.11 : It is a schematic structural diagram when the first supporting structure of the present invention is a strip-shaped plate-like body.

[0037] Fig.12 : It is a cross-sectional schematic diagram of the liquid-cooled cable of the present invention, in which two adjacent wire cores form a semicircular sector and an inner sheath, a shielding structure and an outer sheath layer are arranged on the outer side of the outer liquid cooling channel.

[0038] In the figure:

[0039] 100. Liquid cooling cable;

[0040] 1. Wire core;

[0041] 2. Internal liquid cooling channel; 21. Second supporting structure;

[0042] 3. External liquid cooling channel; 31. First tube body; 32. Second tube body; 331. Columnar structure; 332. Strip plate body; 333. Through hole;

[0043] 4. connecting channel; 41. first conducting hole; 42. second conducting hole;

[0044] 5. Insulation layer;

[0045] 6. Outer sheath layer;

[0046] 7. Shielding structure;

[0047] 8. Inner sheath. DETAILED DESCRIPTION

[0048] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0049] The specific embodiments of the present invention described herein are only used to explain the purpose of the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be considered to belong to the scope of the present invention. It should be noted that when an element is referred to as "arranged on" another element, it can be directly on the other element or there can also be a central element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a central element at the same time. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation method.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0051] like Figures 1 to 12 As shown, the present invention provides a liquid-cooled cable 100, including a liquid-cooling channel and at least one group of wire cores 1 with a fan-shaped cross section, the liquid-cooling channel including an inner liquid-cooling channel 2 and an outer liquid-cooling channel 3, and at least one group of connecting channels 4, the outer liquid-cooling channel 3 is connected to the inner liquid-cooling channel 2 through the connecting channel 4, and a cooling medium flows inside the liquid-cooling channel; the wire core 1 is arranged on the outer periphery of the inner liquid-cooling channel 2 and the inner periphery of the outer liquid-cooling channel 3, and the connecting channel 4 is arranged in the radial direction of the liquid-cooled cable and separates the wire core 1. The inner liquid-cooling channel 2 and the outer liquid-cooling channel 3 are made of materials with strong thermal conductivity.

[0052] In the liquid-cooled cable provided by the present invention, liquid cooling channels are added inside and outside the cable core to ensure the cooling effect of the cable to the greatest extent, thereby improving the current carrying capacity and service life of the cable.

[0053] By providing the connecting channel 4, the cross sections around the longitudinal direction of the fan-shaped wire core 1 can be liquid-cooled to ensure the cooling effect of the cable to the greatest extent, thereby improving the current carrying capacity and service life of the cable.

[0054] In the liquid-cooled cable provided by the present invention, the wire core is arranged into a fan-shaped shape, and each fan-shaped wire core is arranged around the outer wall of the circular inner liquid cooling channel. Compared with arranging a circular wire core of the same cross-sectional area around the outer wall of the inner liquid cooling channel, the cable diameter obtained by arranging the fan-shaped wire core around the outer wall of the circular inner liquid cooling channel is smaller, which is convenient for miniaturized production of the cable, reduces the weight of the cable, facilitates warehouse management, and moves the cable.

[0055] In specific implementation, assuming that the radius of the circular inner liquid cooling channel is r, the annular area S1 formed by four fan-shaped wire cores with a radius of 2r and an angle of 90° around the outer wall of the circular inner liquid cooling channel is S=[(2r) 2 -r 2 ]π, the area of ​​each fan-shaped wire core S2=[(2r) 2 -r 2 ]π / 4=0.25[(2r) 2 -r 2 ]π; if the cross-sectional area of ​​the circular core is S2, the radius of the circular core is R 2 =0.25[(2r) 2 -r 2 ]π / π=0.75r 2 , so R = 0.866r, diameter d = 1.732r, so, if the circular wire core of the same cross-sectional area is arranged around the outer wall of the circular inner liquid-cooling tube, the distance from the central axis of the circular inner liquid-cooling tube to the farthest distance of the circular wire core from the wall of the inner liquid-cooling tube is r+d=r+1.732r=2.732r; compared with the cable formed by surrounding the outer wall of the circular inner liquid-cooling tube with the fan-shaped wire core of the same cross-sectional area, the distance from the central axis of the circular inner liquid-cooling tube to the farthest distance of the circular fan-shaped wire core from the wall of the inner liquid-cooling tube is 2r. It can be seen that compared with the arrangement of the circular wire core of the same cross-sectional area around the outer wall of the inner liquid-cooling channel, the cable obtained by arranging the fan-shaped wire core around the outer wall of the circular inner liquid-cooling channel has a smaller diameter.

[0056] The liquid cooling channel material contains one or more of polyvinyl chloride, polyethylene, polyamide, polytetrafluoroethylene, tetrafluoroethylene / hexafluoropropylene copolymer, ethylene / tetrafluoroethylene copolymer, polypropylene, polyvinylidene fluoride, polyurethane, polyterephthalic acid, polyurethane elastomer, styrene block copolymer, perfluoroalkoxy alkane, chlorinated polyethylene, polyphenylene sulfide, polystyrene, silicone rubber, cross-linked polyolefin, ethylene-propylene rubber, ethylene / vinyl acetate copolymer, chloroprene rubber, natural rubber, styrene-butadiene rubber, nitrile rubber, butadiene rubber, isoprene rubber, ethylene-propylene rubber, chloroprene rubber, butyl rubber, fluororubber, polyurethane rubber, polyacrylate rubber, chlorosulfonated polyethylene rubber, chloroether rubber, chlorinated polyethylene rubber, chlorosulfur rubber, styrene-butadiene rubber, butadiene rubber, hydrogenated nitrile rubber, polysulfide rubber, cross-linked polyethylene, polycarbonate, polysulfone, polyphenylene oxide, polyester, phenolic resin, urea formaldehyde, styrene-acrylonitrile copolymer, polymethacrylate, and polyoxymethylene resin.

[0057] In specific implementation, the cooling medium can be selected from castor oil, coconut oil, corn oil, cottonseed oil, linseed oil, olive oil, palm oil, peanut oil, grape seed oil, rapeseed oil, safflower oil, sunflower oil, soybean oil, high oleic acid variants of various vegetable oils, decene-4-acid, decene acid, laureate acid, lindera aeruginosa acid, tetradecene acid, spermaceti acid, crude oleic acid, palmitoleic acid, celery acid, oleic acid, octadecene acid, gadoleic acid, giant whale acid, cetyl ester acid, erucic acid, and nervonic acid, glycerol, transformer oil, axle oil, internal combustion engine oil or compressor oil; additives can also be added to the cooling oil, and the additives are selected from one or more of antioxidants, pour point depressants, corrosion inhibitors, antibacterial agents, and viscosity modifiers. Cooling oil has the advantages of sensitive thermal balance, super heat conduction, ultra-wide operating temperature range, no boiling, low pressure in the cooling system, no need to add antifreeze in low temperature environment, and avoids corrosion damage such as cavitation, scaling, electrolysis, etc. In specific implementation, as long as the coolant can cool the cable, it is within the scope of protection of the present invention and is not particularly limited here.

[0058] Further, if Figures 1 to 10 As shown, the external liquid cooling channel 3 includes a first tube body 31 and a second tube body 32; the first tube body 31 is sleeved outside the second tube body 32; the external liquid cooling channel 3 also includes at least one first support structure, the first support structure connects the inner wall of the first tube body and the outer wall of the second tube body. The first support structure can ensure the stability of the external liquid cooling channel 3 and ensure that the coolant flows smoothly in the external liquid cooling channel 3.

[0059] Further, if Figures 1 to 10As shown, each connecting channel 4 has a first conducting hole 41 and a second conducting hole 42 at both ends, the first conducting hole 41 penetrates the tube wall of the second tube body 32, and the second conducting hole 42 penetrates the tube wall of the inner liquid cooling channel 2. In this way, the inner liquid cooling channel 2 and the outer liquid cooling channel 3 are connected. The present invention does not specifically limit the connection method of the connecting channel 4, and only needs to realize the connection between the inner liquid cooling channel 2 and the outer liquid cooling channel 3.

[0060] Further, if Fig.11 As shown, each first supporting structure is a plurality of groups of columnar structures 331; and / or, each first supporting structure is a strip plate-like body 332, and the strip plate-like body 332 is provided with a through hole 333; through the provision of a plurality of groups of columnar structures 331, and / or, the strip plate-like body 332 with a through hole 333, the stability of the structure of the external liquid cooling channel 3 is increased, and the internal part of the external liquid cooling channel 3 is made integrally connected, and the cooling medium flows through the entire external liquid cooling channel 3 without restriction.

[0061] Furthermore, each connecting channel 4 has two sets of side walls, and the two sets of side walls are arranged in a manner of rotating around the central axis of the inner liquid cooling channel; or the two sets of side walls are arranged in a manner of being parallel to the central axis of the inner liquid cooling channel. There is no special limitation on the arrangement of the two sets of side walls of each connecting channel 4, as long as it meets the production requirements and user needs.

[0062] Further, if Figures 1 to 7 As shown, at least one wire core 1 is sheathed with an insulating layer 5. By sheathing the insulating layer 5 on the outer periphery of the wire core 1, the wire core 1 can be protected and the safety when using the liquid-cooled cable can be increased.

[0063] In a specific implementation, the insulating layer contains one or more of polyvinyl chloride, polyethylene, polyamide, polytetrafluoroethylene, tetrafluoroethylene / hexafluoropropylene copolymer, ethylene / tetrafluoroethylene copolymer, polypropylene, polyvinylidene fluoride, polyurethane, polyterephthalic acid, polyurethane elastomer, styrene block copolymer, perfluoroalkoxy alkane, chlorinated polyethylene, polyphenylene sulfide, polystyrene, silicone rubber, cross-linked polyolefin, ethylene-propylene rubber, ethylene / vinyl acetate copolymer, chloroprene rubber, natural rubber, styrene-butadiene rubber, nitrile rubber, butadiene rubber, isoprene rubber, ethylene-propylene rubber, chloroprene rubber, butyl rubber, fluororubber, polyurethane rubber, polyacrylate rubber, chlorosulfonated polyethylene rubber, chloroether rubber, chlorinated polyethylene rubber, chlorosulfur rubber, styrene-butadiene rubber, butadiene rubber, hydrogenated nitrile rubber, polysulfide rubber, cross-linked polyethylene, polycarbonate, polysulfone, polyphenylene ether, polyester, phenolic resin, urea formaldehyde, styrene-acrylonitrile copolymer, polymethacrylate, and polyformaldehyde resin.

[0064] Further, if Figure 8As shown, multiple cores 1 are arranged along the radial direction of the liquid cooling cable. In specific implementation, by arranging multiple cores 1 along the radial direction of the liquid cooling cable, while keeping the cross-sectional area of ​​each core 1 unchanged and the number of cores 1 unchanged, compared with arranging each core 1 with the same cross-sectional area as the above cores 1 along the radial direction of the liquid cooling cable alone, arranging multiple cores 1 along the radial direction of the liquid cooling cable can reduce the farthest distance from the central axis of the liquid cooling cable on each core 1, thereby reducing the cross-sectional area of ​​the liquid cooling cable, facilitating use and increasing application scenarios.

[0065] In a specific implementation, when multiple cores 1 are arranged along the radial direction of the liquid-cooling cable, an insulating layer 5 should be added on the outside of the core 1 to ensure that the multiple cores 1 arranged radially are insulated from each other and are not connected.

[0066] In a specific implementation, when a plurality of wire cores 1 are arranged along the radial direction of the liquid-cooled cable, liquid cooling channels may also be arranged between the radially arranged wire cores 1, which can further ensure the cooling effect of the cable.

[0067] Further, if Figures 1 to 10 As shown, the liquid cooling cable 100 further includes an outer sheath layer 6, which is arranged at the outermost periphery of the liquid cooling cable. The outer sheath layer 6 can effectively protect its internal structure and extend the service life of the liquid cooling cable.

[0068] Further, if Figures 1 to 10 As shown, the liquid-cooled cable 100 further includes a shielding structure 7, and the first tube body 31 is sheathed with the shielding structure 7; and / or, at least one core 1 is sheathed with an insulating layer 5, and at least one insulating layer 5 is sheathed with a shielding structure 7. The shielding structure 7 can conduct part of the heat outward to ensure the cooling effect on the core, and isolate the electromagnetic field in the core 1 from the external electromagnetic field to reduce interference to the outside world.

[0069] In this embodiment, the shielding structure 7 is a metal shielding layer, which is used to conduct heat radially outward and reduce interference to the outside world. The shielding structure 7 can be a metal belt, a metal wire, a conductive plastic or a conductive rubber, and the shielding structure 7 adopts one or more of wrapping, longitudinal wrapping, braiding, oblique wrapping, metal armoring or extrusion processing methods.

[0070] Furthermore, the thickness of the shielding structure 7 sheathed on the outside of the insulating layer 5 of the wire core 1 or the shielding structure 7 sheathed on the outer periphery of the first tube body 31 is greater than or equal to 38 μm, and the thickness of the corresponding shielding structure 7 sheathed on the outer periphery of the first tube body 31 or the shielding structure 7 sheathed on the outside of the insulating layer 5 of the wire core 1 is less than 38 μm.

[0071] The thickness of the shielding structure 7 sleeved outside the insulation layer 5 of the core 1 or the shielding structure 7 sleeved outside the first tube 31, and the thickness of the corresponding shielding structure 7 sleeved outside the first tube 31 or the shielding structure 7 sleeved outside the insulation layer 5 of the core 1 can be obtained according to needs and a limited number of experiments. Preferably, the thickness of one shielding sleeve is greater than or equal to 38μm, and the thickness of the other shielding sleeve corresponding to it is less than 38μm. In order to verify the influence of the thickness of the shielding sleeve on the current carrying capacity of the shielding sleeve, the inventors selected different thicknesses of the shielding structure 7 sleeved outside the insulation layer 5 of the core 1 or the shielding structure 7 sleeved outside the first tube 31, and tested the shielding performance of the liquid cooling cable respectively. In this embodiment, the shielding performance value of the liquid cooling cable is greater than 40dB, which is an ideal value.

[0072] During implementation, an insulating layer 5 and a shielding structure 7 are provided on the outside of each wire core 1 to test the shielding performance value of the liquid cooling cable.

[0073] The shielding performance value test method is: the test instrument outputs a signal value for the liquid cooling cable (this value is test value 2), and a detection device is set on the outside of the liquid cooling cable, and this detection device detects a signal value (this value is test value 1). Shielding performance value = test value 2-test value 1.

[0074] Table 1: Effect of the thickness of the shielding structure 7 sheathed outside the insulating layer 5 of the wire core 1 or the shielding structure 7 sheathed outside the first tube 31 on the shielding performance

[0075]

[0076] It can be seen from Table 1 that when the test frequency exceeds 5MHz, the thickness of the shielding structure 7 sheathed outside the insulation layer 5 of the core 1 or the shielding structure 7 sheathed on the outer periphery of the first tube 31 is less than 38μm, and the shielding performance value of the liquid cooling cable is qualified. When the test frequency is less than 5MHz, the thickness of the shielding structure 7 sheathed outside the insulation layer 5 of the core 1 or the shielding structure 7 sheathed on the outer periphery of the first tube 31 is greater than 38μm, and the shielding performance value of the liquid cooling cable is qualified. Therefore, the thickness of the shielding structure 7 sheathed outside the insulation layer 5 of the core 1 or the shielding structure 7 sheathed on the outer periphery of the first tube 31 adopts different thickness values, which can shield the interference signal of the full frequency and ensure the shielding performance of the liquid cooling cable. Therefore, the inventor sets the thickness of the shielding structure 7 sheathed outside the insulation layer 5 of the core 1 or the shielding structure 7 sheathed on the outer periphery of the first tube 31 to be greater than or equal to 38μm, and the corresponding thickness of the shielding structure 7 sheathed on the outer periphery of the first tube 31 or the shielding structure 7 sheathed outside the insulation layer 5 of the core 1 is less than 38μm.

[0077] Further, if Figure 1 , Figure 4 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 As shown, the liquid cooling cable 100 further includes an inner sheath 8 . The outer periphery of the first tube body 31 is provided with the inner sheath 8 . The outer periphery of the inner sheath 8 is provided with a shielding structure 7 .

[0078] By providing the inner sheath 8, the liquid cooling channel can be protected to prevent the liquid cooling channel from being damaged; at the same time, providing the shielding structure 7 outside the inner sheath 8 can improve the stability of the shielding structure 7 and prevent the shielding structure 7 from being damaged.

[0079] The material of the inner sheath or the outer sheath contains one or more of polyvinyl chloride, polyethylene, polyamide, polytetrafluoroethylene, tetrafluoroethylene / hexafluoropropylene copolymer, ethylene / tetrafluoroethylene copolymer, polypropylene, polyvinylidene fluoride, polyurethane, polyterephthalic acid, polyurethane elastomer, styrene block copolymer, perfluoroalkoxy alkane, chlorinated polyethylene, polyphenylene sulfide, polystyrene, silicone rubber, cross-linked polyolefin, ethylene-propylene rubber, ethylene / vinyl acetate copolymer, chloroprene rubber, natural rubber, styrene-butadiene rubber, nitrile rubber, butadiene rubber, isoprene rubber, ethylene-propylene rubber, chloroprene rubber, butyl rubber, fluororubber, polyurethane rubber, polyacrylate rubber, chlorosulfonated polyethylene rubber, chloroether rubber, chlorinated polyethylene rubber, chlorosulfur rubber, styrene-butadiene rubber, butadiene rubber, hydrogenated nitrile rubber, polysulfide rubber, cross-linked polyethylene, polycarbonate, polysulfone, polyphenylene oxide, polyester, phenolic resin, urea formaldehyde, styrene-acrylonitrile copolymer, polymethacrylate, and polyoxymethylene resin.

[0080] Furthermore, the inner liquid cooling channel 2 also includes at least one group of second supporting structures 21, the second supporting structures 21 support and connect the inner wall of the inner liquid cooling channel 2, the second supporting structure 21 is a strip-shaped plate-like body 332, and a plurality of groups of through holes 333 are arranged on the strip-shaped plate-like body; and / or the second supporting structure 21 is a plurality of groups of columnar structures.

[0081] In specific implementation, the second support structure 21 is provided to prevent the inner walls of the inner liquid cooling channel from contacting each other due to external force, resulting in the blockage of the inner liquid cooling channel pipeline and the inability of the cooling medium in the inner liquid cooling channel to flow.

[0082] Furthermore, the ratio of the inner cavity cross-sectional area of ​​the inner liquid-cooling channel 2 to the sum of the cross-sectional areas of the wire core 1 is 2% to 60%.

[0083] In order to verify the influence of the ratio of the inner cavity cross-sectional area of ​​the inner liquid-cooling channel 2 to the sum of the cross-sectional areas of the wire core 1 on the temperature rise of the liquid-cooling cable, the inventor selected a liquid-cooling cable with the same structure, an external liquid-cooling channel 3 with the same cross-sectional area, and a matching wire core 1 with the same sum of cross-sectional areas. During the experiment, a temperature rise experiment was carried out using liquid-cooling cables with different ratios of the inner cavity cross-sectional area of ​​the inner liquid-cooling channel 2 to the sum of the cross-sectional areas of the wire core 1.

[0084] The experimental method of temperature rise is to use liquid cooling cables with different ratios of the inner cavity cross-sectional area of ​​the inner liquid cooling channel 2 to the sum of the cross-sectional areas of the wire core 1 in a closed environment, conduct the same current, record the temperature of the liquid cooling cable before power-on and the temperature of the liquid cooling cable when the temperature is stable after power-on, and take the absolute value of the difference. In this embodiment, a temperature rise of less than 50K is a qualified value.

[0085] Table 2: Effect of the ratio of the inner cross-sectional area of ​​the inner liquid cooling channel 2 to the sum of the cross-sectional areas of the core 1 on the temperature rise of the liquid cooling cable

[0086]

[0087] It can be seen from Table 2 that when the ratio of the inner cavity cross-sectional area of ​​the inner liquid-cooling channel 2 to the sum of the cross-sectional area of ​​the core 1 is less than 2%, due to the small cross-sectional area inside the inner liquid-cooling channel 2, the volume of the cooling medium flowing inside is also small, and the heat generated by the core due to the conduction current cannot be taken away in time, causing the temperature of the liquid-cooled cable to be very high, resulting in a temperature rise of the liquid-cooled cable greater than 50K, and the temperature rise value is unqualified; when the ratio of the inner cavity cross-sectional area of ​​the inner liquid-cooling channel 2 to the sum of the cross-sectional area of ​​the core 1 is greater than or equal to 2%, the volume proportion of the cooling medium inside the inner liquid-cooling channel 2 is relatively It is relatively large and can promptly take away the heat generated by the wire core due to the conduction current. The temperature rise of the liquid-cooled cable is less than 50K. However, as the ratio of the inner cavity cross-sectional area of ​​the inner liquid-cooling channel 2 to the sum of the cross-sectional areas of the wire core 1 continues to increase by 60%, the temperature rise tends to stabilize and no longer has a trend of continuing to decline. However, at this time, due to the large cross-sectional area inside the inner liquid-cooling channel 2, the outer diameter of the liquid-cooling cable will also be large, and the outer diameter of the liquid-cooling cable at this time will be larger than the outer diameter of an ordinary cable without a liquid-cooling channel with the same conduction current. There is no practical optimization significance for using a liquid-cooled cable. Therefore, the inventor chooses a ratio of the inner cavity cross-sectional area of ​​the inner liquid-cooling channel 2 to the sum of the cross-sectional areas of the wire core 1 of 2% to 60%.

[0088] Furthermore, the ratio of the inner cavity cross-sectional area of ​​the external liquid-cooling channel 3 to the sum of the cross-sectional areas of the wire core 1 is 2% to 60%.

[0089] In order to verify the influence of the ratio of the inner cavity cross-sectional area of ​​the external liquid-cooling channel 3 to the sum of the cross-sectional areas of the wire core 1 on the temperature rise of the liquid-cooling cable, the inventor selected liquid-cooling cables with the same structure, internal liquid-cooling channels 2 with the same cross-sectional area, and matching wire cores with the same sum of cross-sectional areas. During the experiment, liquid-cooling cables with different ratios of the inner cavity cross-sectional area of ​​the external liquid-cooling channel 3 to the sum of the cross-sectional areas of the wire core 1 were used to conduct temperature rise experiments.

[0090] The experimental method of temperature rise is to use liquid cooling cables with different ratios of the inner cavity cross-sectional area of ​​the outer liquid cooling channel 3 to the sum of the cross-sectional areas of the wire core 1 in a closed environment, conduct the same current, record the temperature of the liquid cooling cable before power-on and the temperature of the liquid cooling cable when the temperature is stable after power-on, and take the absolute value of the difference. In this embodiment, a temperature rise of less than 50K is a qualified value.

[0091] Table 3: Effect of the ratio of the inner cavity cross-sectional area of ​​the external liquid cooling channel 3 to the sum of the cross-sectional areas of the core 1 on the temperature rise of the liquid cooling cable

[0092]

[0093] It can be seen from Table 3 that when the ratio of the inner cavity cross-sectional area of ​​the external liquid-cooling channel 3 to the sum of the cross-sectional area of ​​the core 1 is less than 2%, due to the small cross-sectional area inside the external liquid-cooling channel 3, the volume of the cooling medium flowing inside is also small, and the heat generated by the core due to the conduction current cannot be taken away in time, resulting in a high temperature of the liquid-cooled cable, causing the temperature rise of the liquid-cooled cable to be greater than 50K, and the temperature rise value is unqualified; when the ratio of the inner cavity cross-sectional area of ​​the external liquid-cooling channel 3 to the sum of the cross-sectional area of ​​the core 1 is greater than or equal to 2%, the volume proportion of the cooling medium inside the external liquid-cooling channel 3 is relatively The liquid cooling cable is large and can promptly take away the heat generated by the conducting current of the core 1. The temperature rise of the liquid cooling cable is less than 50K. However, as the ratio of the inner cavity cross-sectional area of ​​the external liquid cooling channel 3 to the sum of the cross-sectional areas of the core 1 continues to increase by 60%, the temperature rise tends to stabilize and no longer has a trend of continuing to decline. However, at this time, due to the large cross-sectional area inside the external liquid cooling channel 3, the outer diameter of the liquid cooling cable will also be large, and the outer diameter of the liquid cooling cable at this time will be larger than the outer diameter of an ordinary cable without a liquid cooling channel with the same conducting current. There is no practical optimization significance for using liquid cooling cables. Therefore, the inventor chooses a ratio of the inner cavity cross-sectional area of ​​the external liquid cooling channel 3 to the sum of the cross-sectional areas of the core 1 of 2% to 60%.

[0094] Furthermore, the ratio of the distance between the two side walls of the connecting channel 4 to the circumference of the inner liquid-cooling channel 2 is 5% to 45%.

[0095] In order to verify the influence of the ratio of the distance between the two side walls of the connecting channel 4 to the circumference of the inner liquid cooling channel 2 on the temperature rise of the liquid cooling cable, the inventor selected liquid cooling cables with the same structure. During the experiment, temperature rise experiments were carried out using liquid cooling cables with different ratios of the distance between the two side walls of the connecting channel 4 to the circumference of the inner liquid cooling channel 2.

[0096] The experimental method of temperature rise is to use liquid cooling cables with different ratios of the distance between the two side walls of the connecting channel 4 to the circumference of the inner liquid cooling channel 2 in a closed environment, conduct the same current, record the temperature of the liquid cooling cable before power-on and the temperature of the liquid cooling cable when the temperature is stable after power-on, and take the absolute value of the difference. In this embodiment, a temperature rise of less than 50K is a qualified value.

[0097] Table 4: Effect of the ratio of the distance between the two side walls of the connecting channel 4 to the circumference of the inner liquid cooling channel 2 on the temperature rise of the liquid cooling cable

[0098]

[0099] It can be seen from Table 4 that when the ratio of the distance between the two side walls of the connecting channel 4 to the circumference of the inner liquid cooling channel 2 is less than 5%, since the connecting channel 4 cannot well realize the circulation of the cooling medium between the inner liquid cooling channel 2 and the outer liquid cooling channel 3, the volume of the cooling medium flowing inside the connecting channel 4 is also very small, and the heat generated by the wire cores 1 on both sides of the connecting channel 4 due to the conduction current cannot be taken away in time, resulting in a very high temperature of the liquid cooling cable, causing the temperature rise of the liquid cooling cable to be greater than 50K, and the temperature rise value is unqualified; the distance between the two side walls of the connecting channel 4 accounts for the inner liquid cooling When the ratio of the circumference of channel 2 is greater than or equal to 45%, the volume of the cooling medium inside the connecting channel 4 accounts for a relatively large proportion, which can well realize the circulation of the cooling medium between the inner liquid cooling channel 2 and the outer liquid cooling channel 3, and can promptly take away the heat generated by the wire cores on both sides of the connecting channel 4 due to the conduction current 1. The temperature rise of the liquid cooling cable is less than 50K, but as the distance between the two side walls of the connecting channel 4 accounts for 45% of the circumference of the inner liquid cooling channel 2, the temperature rise tends to stabilize and no longer has a trend of continuing to decline. At this time, if the ratio continues to increase, it is meaningless. Therefore, the inventor needs to set the distance between the two side walls of the connecting channel 4 to 5% to 45% of the circumference of the inner liquid cooling channel 2.

[0100] Furthermore, the ratio of the total circumferential width of the first support structure to the circumference of the external liquid-cooling channel 3 is 4% to 54%.

[0101] When the first supporting structure is a strip plate-like body 332, in order to verify the influence of the ratio of the total circumferential width of the first supporting structure to the circumference of the external liquid cooling channel 3 on the temperature rise of the liquid cooling cable, the inventor selects liquid cooling cables with the same structure. During the experiment, liquid cooling cables with different ratios of the total circumferential width of the first supporting structure to the circumference of the external liquid cooling channel 3 are used to conduct temperature rise experiments.

[0102] The experimental method of temperature rise is to use liquid cooling cables with different ratios of the circumferential total width of the first support structure to the circumference of the external liquid cooling channel in a closed environment, conduct the same current, record the temperature of the liquid cooling cable before power-on and the temperature of the liquid cooling cable when the temperature is stable after power-on, and take the absolute value of the difference. In this embodiment, a temperature rise of less than 50K is a qualified value, and at the same time, it is necessary to ensure that the external liquid cooling channel does not deform; if the external liquid cooling channel 3 is deformed, it is also unqualified.

[0103] Table 5: Effect of the ratio of the total circumferential width of the first support structure to the circumference of the outer liquid cooling channel 3 on the temperature rise of the liquid cooling cable

[0104]

[0105] It can be seen from Table 5 that when the ratio of the total circumferential width of the first support structure to the circumference of the outer liquid-cooling channel 3 is less than 4%, the outer liquid-cooling channel 3 is deformed and there is no need to perform a temperature rise test on it. When the ratio of the total circumferential width of the first support structure to the circumference of the outer liquid-cooling channel 3 is greater than 54%, since the first support structure accounts for a large proportion, the cooling medium flowing in the outer liquid-cooling channel 3 accounts for a small proportion, and the heat generated by the wire cores on both sides of the outer liquid-cooling channel 3 due to the conduction current cannot be taken away in time, resulting in a very high temperature of the liquid-cooling cable, resulting in a temperature rise of the liquid-cooling cable greater than 50K, and the temperature rise value is unqualified; therefore, the inventors choose the ratio of the total circumferential width of the first support structure to the circumference of the outer liquid-cooling channel 3 to be 4% to 54%.

[0106] Furthermore, the ratio of the total circumferential width of the second support structure 21 to the inner diameter of the inner liquid-cooling channel 2 is 3% to 20%.

[0107] When the second supporting structure 21 is a strip-shaped plate-like body 332, in order to verify the influence of the ratio of the total circumferential width of the second supporting structure 21 to the inner diameter of the inner liquid-cooling channel 2 on the temperature rise of the liquid-cooling cable, the inventor selected liquid-cooling cables with the same structure. During the experiment, liquid-cooling cables with different ratios of the circumferential width of the second supporting structure 21 to the inner diameter of the inner liquid-cooling channel 2 were used to conduct temperature rise experiments.

[0108] The experimental method of temperature rise is to use liquid cooling cables with different ratios of the circumferential total width of the second support structure 21 to the inner diameter of the inner liquid cooling channel in a closed environment, conduct the same current, record the temperature of the liquid cooling cable before power-on and the temperature of the liquid cooling cable when the temperature is stable after power-on, and take the absolute value of the difference. In this embodiment, a temperature rise of less than 50K is a qualified value, and it is necessary to ensure that the inner liquid cooling channel 2 does not deform; if the inner liquid cooling channel 2 is deformed, it is also unqualified.

[0109] Table 6: Effect of the ratio of the total circumferential width of the second support structure 21 to the inner diameter of the inner liquid cooling channel 2 on the temperature rise of the liquid cooling cable

[0110]

[0111] It can be seen from Table 6 that when the ratio of the circumferential width of the second support structure 21 to the circumference of the inner liquid-cooling channel 2 is less than 3%, although the temperature rise of the liquid-cooling cable is less than 50K, the production difficulty is relatively large due to the small ratio of the circumferential width of the second support structure 21 to the inner diameter of the inner liquid-cooling channel 2. When the ratio of the total circumferential width of the second support structure 21 to the circumference of the inner liquid-cooling channel 2 is greater than 20%, the temperature rise of the liquid-cooling cable is greater than 50K, so the temperature rise value is unqualified; therefore, the ratio of the circumferential width of the second support structure 21 to the inner diameter of the inner liquid-cooling channel is 3% to 20%.

[0112] Furthermore, the liquid-cooled cable 100 also includes a liquid-cooled circulation pump, which is connected to the liquid-cooled channel through a connecting pipe, and is used to circulate and cool the cooling medium in the liquid-cooled channel. The cooling medium is used to take away the heat generated by the cable core 1 during operation, and the heat in the cooling medium can be quickly dissipated to the external environment through the liquid-cooled circulation pump, thereby ensuring the normal use of the liquid-cooled cable.

[0113] The specific embodiments are as follows:

[0114] like Figure 1 As shown, each core of the liquid-cooling cable of the present invention is covered with an insulating layer and a shielding structure on the periphery, and an inner sheath, a shielding structure and an outer sheath layer are arranged on the outer side of the external liquid-cooling channel.

[0115] like Figure 2 As shown, each core of the liquid-cooling cable of the present invention is covered with an insulating layer and a shielding structure on the periphery, and a shielding structure and an outer sheath layer are arranged on the outer side of the external liquid-cooling channel.

[0116] like Figure 3 As shown, the outer periphery of the core of the liquid-cooling cable of the present invention is covered with an insulating layer, and a shielding structure and an outer sheath layer are arranged on the outer side of the external liquid-cooling channel.

[0117] like Figure 4 As shown, the outer periphery of the core of the liquid-cooling cable of the present invention is covered with an insulating layer, and an inner sheath, a shielding structure and an outer sheath layer are arranged on the outer side of the external liquid-cooling channel.

[0118] like Figure 5 As shown, the outer periphery of each wire core of the liquid-cooling cable of the present invention is covered with an insulating layer and a shielding structure, and an outer sheath layer is arranged on the outer side of the outer liquid-cooling channel.

[0119] like Figure 6 As shown, the outer periphery of a core of the liquid-cooling cable of the present invention is covered with an insulating layer and a shielding structure, and an inner sheath, a shielding structure and an outer sheath layer are arranged on the outer side of the external liquid-cooling channel.

[0120] like Figure 7 As shown, the outer periphery of a core of the liquid-cooling cable of the present invention is covered with an insulating layer and a shielding structure, and the outer side of the external liquid-cooling channel is provided with a shielding structure and an outer sheath layer.

[0121] like Figure 8 As shown, the wire cores of the liquid cooling cable of the present invention are arranged in plurality along the radial direction of the liquid cooling cable, and an inner sheath, a shielding structure and an outer sheath layer are arranged outside the outer liquid cooling channel.

[0122] like Fig. 9 As shown, each wire core of the liquid cooling cable of the present invention is in a semicircular sector shape, and an inner sheath, a shielding structure and an outer sheath layer are arranged on the outer side of the outer liquid cooling channel.

[0123] like Fig.10As shown, the liquid-cooling cable of the present invention comprises a wire core, and an inner sheath, a shielding structure and an outer sheath layer are arranged on the outer side of an outer liquid-cooling channel.

[0124] like Fig.12 , which is a cross-sectional schematic diagram of the liquid-cooling cable of the present invention when two adjacent wire cores form a semicircular sector and an inner sheath, a shielding structure and an outer sheath layer are arranged on the outer side of the outer liquid-cooling channel.

[0125] As described above, the liquid cooling cable of the present invention has the following beneficial effects:

[0126] In the liquid-cooled cable provided by the present invention, liquid cooling channels are added inside and outside the wire core to ensure the cooling effect of the cable to the greatest extent; the outer sheath layer can effectively protect its internal structure; the liquid-cooled cable of the present invention has good heat dissipation effect of the wire core, thereby improving the current carrying capacity and service life of the cable.

[0127] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A liquid-cooled cable, comprising a liquid-cooling channel and a wire core having a fan-shaped cross section, characterized in that: The wire cores are arranged in a plurality along the radial direction of the liquid-cooling cable; the liquid-cooling channel comprises an inner liquid-cooling channel and an outer liquid-cooling channel, and at least one group of connecting channels, the outer liquid-cooling channel is connected with the inner liquid-cooling channel through the connecting channel, and a cooling medium flows inside the liquid-cooling channel; the wire cores are arranged on the outer periphery of the inner liquid-cooling channel and the inner periphery of the outer liquid-cooling channel, and the connecting channels are arranged in the radial direction of the liquid-cooling cable and separate the wire cores; The external liquid cooling channel comprises a first tube body and a second tube body; the first tube body is sleeved on the second tube body; the external liquid cooling channel further comprises at least one first supporting structure, the first supporting structure connecting the inner wall of the first tube body and the outer wall of the second tube body; Each of the connecting channels has a first conducting hole and a second conducting hole at both ends, the first conducting hole is arranged through the tube wall of the second tube body, and the second conducting hole is arranged through the tube wall of the inner liquid cooling channel; Each of the connecting channels has two sets of side walls, and the two sets of side walls are arranged in a manner of rotating around the central axis of the inner liquid cooling channel; or, the two sets of side walls are arranged in a manner of being parallel to the central axis of the inner liquid cooling channel; The ratio of the sum of the inner cavity cross-sectional area of ​​the inner liquid cooling channel and the wire core cross-sectional area is 2% to 60%; The ratio of the sum of the inner cavity cross-sectional area of ​​the external liquid cooling channel and the wire core cross-sectional area is 2% to 60%; The ratio of the distance between the two side walls of the connecting channel to the circumference of the inner liquid cooling channel is 5% to 45%.

2. The liquid cooling cable according to claim 1, characterized in that: Each of the first supporting structures is a plurality of groups of columnar structures; and / or each of the first supporting structures is a strip-shaped plate-shaped body, and the strip-shaped plate-shaped body is provided with through holes.

3. The liquid cooling cable according to claim 1, characterized in that: An insulating layer is sheathed around the outer periphery of at least one of the wire cores.

4. The liquid cooling cable according to claim 1, characterized in that: The liquid cooling cable further includes an outer sheath layer, and the outer sheath layer is arranged at the outermost periphery of the liquid cooling cable.

5. The liquid cooling cable according to claim 2, characterized in that: The liquid-cooling cable further comprises a shielding structure, which is sheathed on the outer periphery of the first tube body; and / or, an insulating layer is sheathed on the outer periphery of at least one of the wire cores, and the shielding structure is sheathed on the outer periphery of at least one of the insulating layers.

6. The liquid cooling cable according to claim 5, characterized in that: The liquid cooling cable further comprises an inner sheath, the inner sheath is sheathed on the outer periphery of the first tube body, and the shielding structure is sheathed on the outer periphery of the inner sheath.

7. The liquid cooling cable according to claim 1, characterized in that: The inner liquid cooling channel also includes at least one group of second supporting structures, which support and connect the inner wall of the inner liquid cooling channel, and the second supporting structure is a strip-shaped plate-like body, on which a plurality of through holes are arranged; and / or the second supporting structure is a plurality of columnar structures.

8. The liquid cooling cable according to claim 2, characterized in that: The ratio of the total circumferential width of the first support structure to the circumference of the external liquid-cooling channel is 4% to 54%.

9. The liquid cooling cable according to claim 7, characterized in that: The ratio of the total circumferential width of the second support structure to the inner diameter of the inner liquid-cooling channel is 3% to 20%.

10. The liquid cooling cable according to any one of claims 1 to 9, characterized in that: It also includes a liquid cooling circulation pump, which is connected to the liquid cooling channel through a connecting pipe, and is used to circulate and cool the cooling medium in the liquid cooling channel.

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