Liquid-cooled cable and processing method of liquid-cooled cable

Abstract

The invention relates to a liquid cooling cable and a processing method of the liquid cooling cable, the liquid cooling cable comprises a main core wire, a first sheath and a second sheath, the first sheath sleeves the main core wire, the outer surface of part of the main core wire is in contact with the inner surface of the first sheath, the outer surface of the first sheath is provided with a heat insulation groove, and the heat insulation groove is communicated with the first sheath. The heat insulation groove corresponds to the contact part of the outer surface of the main core wire and the inner surface of the first sheath; the second sheath is sleeved outside the first sheath. When the main core wire is electrified and heated, the heat insulation groove corresponds to the area with the highest temperature rise, air in the heat insulation groove can serve as an effective heat insulation medium, heat conducted from the area with the highest temperature rise on the first sheath to the second sheath is reduced, and therefore the temperature of the second sheath is effectively reduced, the temperature of the second sheath is prevented from exceeding the standard, and user experience is improved; moreover, the sum of the thickness of the first sheath and the thickness of the second sheath can be equal to the thickness of the sheath of a common cable, so that the diameter of the liquid-cooled cable is prevented from being increased.

Description

Technical Field

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

[0002] Cables of devices such as charging guns usually use immersion liquid cooling to dissipate heat. In actual operation, some conductors may be attached to the inner surface of the liquid cooling tube. If the position where the conductor is attached to the liquid cooling tube happens to be attached to the inner surface of the cable sheath, the cable sheath will rise, affecting the user experience.

[0003] Especially when the ambient temperature of the charging gun is high or the charging gun is working at a high current, the temperature of the cable sheath may exceed the standard. Summary of the invention

[0004] Based on this, it is necessary to provide a liquid-cooled cable and a processing method for the liquid-cooled cable to address the above problems, so as to reduce the temperature of the cable sheath.

[0005] The present invention first provides a liquid-cooled cable, comprising: a main core wire; a first sheath, which is sleeved on the outside of the main core wire, and a portion of the outer surface of the main core wire contacts the inner surface of the first sheath, and the outer surface of the first sheath is provided with a heat insulation groove, and the heat insulation groove corresponds to the portion where the outer surface of the main core wire contacts the inner surface of the first sheath; and a second sheath, which is sleeved on the outside of the first sheath.

[0006] In the above-mentioned liquid-cooled cable, when the main core wire is energized and heated, the part where the inner surface of the first sheath and the outer surface of the main core wire contact is usually the area with the highest temperature rise on the first sheath. The insulation groove corresponds to the area with the highest temperature rise. The air in the insulation groove can serve as an effective insulation medium to improve the insulation performance between the first sheath and the second sheath, reduce the heat conducted from the area with the highest temperature rise on the first sheath to the second sheath, thereby effectively reducing the temperature of the second sheath, preventing the temperature of the second sheath from exceeding the standard, and improving the user experience; and the sum of the thickness of the first sheath and the second sheath can be equal to the thickness of the outer skin of a general cable, avoiding increasing the diameter of the liquid-cooled cable. The liquid-cooled cable has a simple structure and low cost.

[0007] In one embodiment, the number of the main core wires is at least two, and the main core wires are twisted together; the number of the thermal insulation grooves is at least two, and they are arranged in a one-to-one correspondence with the main core wires, and each of the thermal insulation grooves is spiral.

[0008] Such an arrangement ensures that each heat-insulating groove can provide heat-insulating effect to the main core wire corresponding thereto.

[0009] In one embodiment, the cross-section of the thermal insulation groove is triangular or crescent-shaped.

[0010] With such arrangement, both the triangle and the crescent shape can improve the structural strength of the heat insulation groove, and prevent the heat insulation groove from being deformed by extrusion, causing the inner surface of the second jacket to contact the bottom wall of the heat insulation groove and affecting the heat insulation effect.

[0011] In one embodiment, the liquid cooling cable also includes a Mylar component, which is covered on the notch of the insulation groove; or, the liquid cooling cable also includes a plastic tube, which is embedded in the insulation groove, and the cross-sectional shape of the plastic tube is the same as the cross-sectional shape of the insulation groove.

[0012] With such arrangement, the Mylar element can support the inner surface of the second sheath, and the plastic tube can support the inner surface of the second sheath and the bottom wall of the insulation groove, so as to improve the structural strength of the insulation groove and protect the insulation groove.

[0013] In one of the embodiments, the liquid-cooled cable further includes a porous thermal insulation member, and the porous thermal insulation member is filled in the thermal insulation groove.

[0014] With such arrangement, the porous thermal insulation element can reduce radiation heat exchange and gas molecule movement, thereby enhancing the thermal insulation effect.

[0015] In one embodiment, the main core wire includes a first liquid cooling tube and a conductor. The first liquid cooling tube is provided with a first channel for filling with cooling liquid, and the conductor is inserted into the first channel.

[0016] With such an arrangement, the coolant flowing in the first channel can take away the heat generated by the conductor in the first liquid cooling tube, so as to ensure the heat dissipation performance of the liquid cooling cable.

[0017] In one embodiment, the liquid-cooled cable further includes a second liquid-cooling tube inserted into the first sheath, the second liquid-cooling tube is provided with a second channel for filling with cooling liquid, and the cooling liquid in the second channel flows in the opposite direction to the cooling liquid in the first channel.

[0018] In this arrangement, one of the first channel and the second channel is a liquid inlet channel, and the other is a liquid outlet channel, so that the coolant in each first channel can evenly dissipate heat for the conductor passing through the first channel, and the second liquid cooling tube plays a cooling and heat dissipation role to improve the performance and service life of the liquid cooling cable.

[0019] The present invention also provides a method for processing a liquid cooling cable, comprising the steps of: Preparing the main core wire; Preparing a first sheath outside the main core wire; Processing a heat-insulating groove on the outer surface of the first sheath corresponding to a portion where the outer surface of the main core wire and the inner surface of the first sheath are in contact; A second sheath is prepared outside the first sheath.

[0020] In this way, machining the insulation groove on the outer surface of the first sheath can improve the insulation performance between the first sheath and the second sheath, effectively reducing the temperature of the second sheath; and the sum of the thickness of the first sheath and the second sheath can be equal to the thickness of the outer skin of a general cable, avoiding increasing the diameter of the liquid-cooled cable.

[0021] In one embodiment, in the step of machining the heat-insulating groove on the outer surface of the first sheath corresponding to the portion in contact with the outer surface of the main core wire and the inner surface of the first sheath, the step further includes: Wrapping a thermal test paper on the outer surface of the first sheath; energizing the main core wire; According to the color change area of ​​the thermosensitive test paper, a high temperature area is marked on the outer surface of the first sheath; Remove the thermal test paper; A heat-insulating groove is processed in the high-temperature area on the outer surface of the first jacket.

[0022] With such an arrangement, the temperature change of the first sheath can be intuitively displayed through the thermosensitive test paper, so as to accurately and conveniently determine the area with the highest temperature rise on the first sheath.

[0023] In one embodiment, before the step of preparing the second sheath outside the first sheath, the method further comprises the following steps: Covering the notch of the thermal insulation groove with a Mylar piece; or, A plastic tube having the same cross-sectional shape as that of the heat insulation groove is embedded in the heat insulation groove.

[0024] With such arrangement, the Mylar piece and the plastic tube can be flush with the heat insulation groove, so as to facilitate processing of the second sheath outside the first sheath. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of a liquid cooling cable according to an embodiment of the present invention; Figure 2 The present invention provides Figure 1 A schematic diagram of the enlarged structure at A in the middle; Figure 3 The present invention provides Figure 1 Three-dimensional diagram of the processing process of liquid cooling cable Figure 1 ; Figure 4 The present invention provides Figure 1 Three-dimensional diagram of the processing process of liquid cooling cable Figure 2 ; Figure 5 The present invention provides Figure 1 Cross-sectional view of the processing process of the liquid cooling cable Figure 1 ; Figure 6 The present invention provides Figure 1 Cross-sectional view of the processing process of the liquid cooling cable Figure 2 ; Figure 7 The present invention provides Figure 1 Cross-sectional view of the processing process of the liquid cooling cable Figure 3 ; Figure 8 The present invention provides Figure 1 Cross-sectional view of the processing process of the liquid cooling cable Figure 4 ; Fig. 9 The present invention provides Figure 8 A schematic diagram of the enlarged structure at B in the middle; Fig.10 The present invention provides Fig. 9 The cross section of the middle heat insulation groove is a schematic diagram of a triangle structure; Fig.11 A flowchart of a method for processing a liquid-cooled cable according to an embodiment of the present invention; Fig.12 The present invention provides Fig.11 A flow chart of machining the thermal insulation groove on the outer surface of the first jacket.

[0027] Figure numerals: 1, main core wire; 11, first liquid cooling tube; 111, first channel; 12, conductor; 2, first sheath; 21, insulation groove; 3, second sheath; 4, second liquid cooling tube; 41, second channel; 5, Mylar component. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0029] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used 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 in the specification of this application includes any and all combinations of one or more related listed items.

[0033] Cables for devices such as charging guns usually use immersion liquid cooling for heat dissipation. The national standard has clear requirements for the cable sheath temperature of the charging gun, and the cable sheath temperature should not exceed 77°C under any conditions. In the actual working process, some conductors may be attached to the inner surface of the liquid cooling tube. If the position where the conductor is attached to the liquid cooling tube happens to be attached to the inner surface of the cable sheath, it will cause the cable sheath to rise, affecting the user experience. In particular, when the ambient temperature of the charging gun is high or the charging gun is working at a high current, the temperature of the cable sheath may exceed the standard.

[0034] In the relevant existing technology, some cables increase the thickness of the liquid cooling tube and the outer skin or add thermal insulation materials inside the outer skin to reduce the temperature of the outer skin. However, the thermal insulation effect of the above-mentioned thermal insulation method is limited, and it will also increase the diameter of the cable, which still affects the user experience.

[0035] In order to solve the above problems, Figures 1 to 10 As shown, the present invention first provides a liquid-cooled cable to reduce the temperature of the cable sheath.

[0036] like Figure 1 , Figure 4 and Figure 5 As shown, specifically, the liquid-cooled cable includes a main core wire 1, a first sheath 2 and a second sheath 3, wherein: the first sheath 2 is sleeved on the outside of the main core wire 1, a portion of the outer surface of the main core wire 1 is in contact with the inner surface of the first sheath 2, and an insulation groove 21 is provided on the outer surface of the first sheath 2, and the insulation groove 21 corresponds to the portion where the outer surface of the main core wire 1 and the inner surface of the first sheath 2 are in contact; the second sheath 3 is sleeved on the outside of the first sheath 2.

[0037] The portion where the outer surface of the main core wire 1 contacts the inner surface of the first sheath 2 is the portion where the outer surface of the main core wire 1 and the inner surface of the first sheath 2 are tangent. The heat insulation groove 21 corresponds to the portion where the outer surface of the main core wire 1 and the inner surface of the first sheath 2 contact, which means that the projection of the heat insulation groove 21 on the outer surface of the main core wire 1 at least partially overlaps with the portion where the outer surface of the main core wire 1 and the inner surface of the first sheath 2 contact.

[0038] In the liquid-cooled cable provided by the embodiment of the present invention, when the main core wire 1 is energized and heated, the portion where the inner surface of the first sheath 2 and the outer surface of the main core wire 1 contact is usually the area on the first sheath 2 with the highest temperature rise. Since the insulation groove 21 corresponds to the portion where the outer surface of the main core wire 1 and the inner surface of the first sheath 2 contact, that is, the insulation groove 21 corresponds to the area with the highest temperature rise, and the thermal conductivity of air is only about 10% of the thermal conductivity of the first sheath 2 and the second sheath 3, the air in the insulation groove 21 can serve as an effective insulation medium to improve the thermal insulation performance between the first sheath 2 and the second sheath 3, and reduce the heat conducted from the area with the highest temperature rise on the first sheath 2 to the second sheath 3, thereby effectively reducing the temperature of the second sheath 3, preventing the temperature of the second sheath 3 from exceeding the standard, and improving the user experience; and the sum of the thickness of the first sheath 2 and the second sheath 3 can be equal to the thickness of the outer skin of a general cable, avoiding increasing the diameter of the liquid-cooled cable, and the liquid-cooled cable has a simple structure and low cost.

[0039] It should be noted that, in actual use, since the first sheath 2 deviates from the area with the highest temperature rise by 2mm to 3mm, the temperature of the first sheath 2 can drop by more than 10°C. Therefore, the heat conducted from other areas on the first sheath 2 to the second sheath 3 is generally low, and will not cause the temperature of the second sheath 3 to exceed the standard.

[0040] like Figure 2 As shown, the number of main core wires 1 is at least two, and each main core wire 1 includes a first liquid cooling tube 11 and a conductor 12. The first liquid cooling tube 11 is provided with a first channel 111 for filling the coolant, and the conductor 12 is arranged in the first channel 111. The two ends of the liquid cooling cable are respectively used to connect with the charging gun and the charging pile (not shown in the figure). The charging pile is provided with a power supply and a cooling device. Part of the conductor 12 is electrically connected to the positive electrode of the power supply, and the remaining conductor 12 is electrically connected to the negative electrode of the power supply. In one embodiment, the coolant in the cooling device can flow to the charging gun through the first channel 111 of at least one of the first liquid cooling tubes 11, and the coolant in the charging gun can flow back to the cooling device through the first channels 111 of the remaining first liquid cooling tubes 11, that is, at least one of the first channels 111 is a liquid inlet channel, and the remaining first channels 111 are liquid outlet channels, so as to realize the circulation of the coolant, and the coolant flowing in the first channel 111 can take away the heat generated by the conductor 12 in the first liquid cooling tube 11, so as to ensure the heat dissipation performance of the liquid cooling cable.

[0041] like Figure 2 As shown, in another embodiment, since the temperature of the coolant rises after flowing through the liquid inlet channel and the charging gun, the heat exchange capacity may be weakened when flowing through the liquid outlet channel. Therefore, the liquid-cooled cable also includes a second liquid cooling tube 4 inserted into the first sheath 2, and the second liquid cooling tube 4 is provided with a second channel 41 for filling the coolant, and the coolant in the second channel 41 flows in the opposite direction to the coolant in the first channel 111. That is, one of the first channel 111 and the second channel 41 is the liquid inlet channel, and the other is the liquid outlet channel. Taking the second channel 41 as the liquid inlet channel and the first channel 111 as the liquid outlet channel as an example, the coolant in the cooling device can flow to the charging gun through the second channel 41 of the second liquid cooling tube 4, and the coolant in the charging gun can be diverted to the first channel 111 of each first liquid cooling tube 11, and flow back to the cooling device through each first channel 111 to realize the circulation of the coolant. Thus, the coolant in each first channel 111 can evenly dissipate heat for the conductor 12 passing through the first channel 111, and the second liquid cooling tube 4 can also cool and dissipate heat for other structures in the liquid-cooled cable, such as the first sheath 2, the second sheath 3, and the main core wire 1, so as to improve the performance and service life of the liquid-cooled cable. The number of the second liquid cooling tubes 4 can be one, two, or more.

[0042] Furthermore, the liquid cooling cable also includes other cables (not shown) inserted into the first sheath 2, and the other cables include at least one of a signal line, a control line, and a ground line. The signal line is used to transmit signals between the charging pile and the device connected to the charging gun, the control line is used to control the operation of the device, and the ground line is used to introduce leakage current into the ground to ensure the safety of the device.

[0043] like Figure 3 to Figure 4 As shown, each main core wire 1 is twisted with each other, and the number of the heat-insulating grooves 21 is at least two, and they are arranged one-to-one with the main core wires 1, and each heat-insulating groove 21 is spiral. After each main core wire 1 is twisted with each other, each main core wire 1 is spiral, and the part of each main core wire 1 in contact with the inner surface of the first sheath 2 is also spiral. Therefore, setting each heat-insulating groove 21 in a spiral shape can ensure the accuracy of the opening position of the heat-insulating groove 21, and ensure that each heat-insulating groove 21 can have a heat-insulating effect on the main core wire 1 corresponding thereto. In addition, when the liquid-cooling wire includes the second liquid-cooling tube 4 and other cables, the second liquid-cooling tube 4 and other cables are also twisted with each main core wire 1 to form a cable body.

[0044] like Figures 9 and 10 As shown, the cross section of the heat insulation groove 21 can be Fig.10 The triangle shown or Fig. 9 The crescent shape shown. Both the triangle and the crescent shape can improve the structural strength of the thermal insulation groove 21, and prevent the thermal insulation groove 21 from being squeezed and deformed, causing the inner surface of the second sheath 3 to contact the bottom wall of the thermal insulation groove 21 and affect the thermal insulation effect. Preferably, on the cross section of the liquid-cooled cable, the maximum depth dimension of the thermal insulation groove 21 corresponds to the portion that contacts the outer surface of the main core wire 1 and the inner surface of the first sheath 2, so that the position where the thermal insulation groove 21 has the best thermal insulation effect corresponds to the highest temperature rise point on the first sheath 2. Among them, the maximum depth dimension of the thermal insulation groove 21 refers to the vertex of the triangular thermal insulation groove 21 facing the side of the main core wire 1 or the midpoint of the crescent-shaped thermal insulation groove 21.

[0045] like Figures 7 and 8 As shown, in one embodiment, the liquid-cooled cable further includes a Mylar component 5, which is covered on the notch of the heat-insulating groove 21. The Mylar component 5 can support the inner surface of the second sheath 3 to improve the structural strength of the heat-insulating groove 21 and protect the heat-insulating groove 21, so that when the second sheath 3 is processed and in the use of the liquid-cooled cable, the shape of the heat-insulating groove 21 can always remain unchanged, preventing the heat-insulating groove 21 from being deformed by extrusion, causing the inner surface of the second sheath 3 to contact the bottom wall of the heat-insulating groove 21 and affecting the heat-insulating effect. In another embodiment, the liquid-cooled cable further includes a plastic tube (not shown), which is embedded in the heat-insulating groove 21, and the cross-sectional shape of the plastic tube is the same as the cross-sectional shape of the heat-insulating groove 21. Similarly, the plastic tube can also support the inner surface of the second sheath 3 and the bottom wall of the heat-insulating groove 21 to improve the structural strength of the heat-insulating groove 21 and protect the heat-insulating groove 21.

[0046] Furthermore, due to the diameter limitation of the liquid-cooled cable, the thickness of the first sheath 2 is limited, so the depth dimension of the insulation groove 21 is relatively small, and there is radiation heat exchange in the liquid-cooled cable during operation, and the air in the insulation groove 21 may have limited insulation effect on the radiation heat exchange. Therefore, the liquid-cooled cable also includes a porous insulation member (not shown), which is filled in the insulation groove 21. The porous insulation member can reduce the radiation heat exchange and the movement of gas molecules, thereby enhancing the insulation effect. Among them, the porous insulation member can be a porous insulation material such as polyurethane foam, polystyrene foam, or phenolic foam. Structures such as the Mylar member 5 or the plastic tube in the insulation groove 21 can prevent the porous insulation member from being over-extruded and affecting the insulation effect of the porous insulation member. When a plastic tube is embedded in the insulation groove 21, the porous insulation member is filled in the plastic tube.

[0047] like Figures 5 to 8 and Fig.11 As shown, an embodiment of the present invention further provides a method for processing a liquid cooling cable, comprising the steps of: S100. Prepare the main core wire 1; S200. Preparing a first sheath 2 outside the main core wire 1; S300. Processing a heat-insulating groove 21 on the outer surface of the first sheath 2 corresponding to the portion in contact with the outer surface of the main core wire 1 and the inner surface of the first sheath 2; S400 . Prepare a second sheath 3 outside the first sheath 2 .

[0048] In step S100, a conductor 12 is first prepared, and a first liquid cooling tube 11 is wrapped around the conductor 12. The conductor 12 can be made of a high-purity copper conductor material, such as a copper wire braid, a thick copper conductor or a twisted copper conductor. The first liquid cooling tube 11 can be made of a soft insulating material with low hardness, high thermal conductivity, high temperature resistance and no chemical reaction with the coolant, such as a cross-linked polyolefin part or a thermally conductive silicone rubber part. The specific preparation method of the main core wire 1 is the same as the existing preparation method of the main core wire 1, and will not be described in detail here. In addition, while preparing the main core wire 1, the second liquid cooling tube 4 and other cables such as signal lines, control lines, and grounding lines can also be prepared. After step S100, the main core wires 1, the second liquid cooling tube 4 and other cables can also be twisted together to form a cable body.

[0049] like Figure 3 and Figure 5As shown, in step S200, after the main core wire 1 is prepared, a first sheath 2 is prepared outside the main core wire 1, and the first sheath 2 can be processed by extrusion molding. Among them, the thickness of the first sheath 2 needs to be greater than the depth of the required insulation groove 21, and less than the overall thickness of the required sheath. When the liquid-cooled cable also includes a second liquid-cooling tube 4 and other cables, the first sheath 2 is prepared outside the cable body formed by twisting the main core wires 1, the second liquid-cooling tube 4 and other cables together.

[0050] like Figure 3 , Figure 4 and Figure 6 As shown, in step S300, a heat insulation groove 21 corresponding to the portion in contact with the outer surface of the main core wire 1 and the inner surface of the first sheath 2 is processed on the first sheath 2, so that the heat insulation groove 21 corresponds to the area with the highest temperature rise on the first sheath 2. Therefore, during the operation of the liquid-cooled cable, the air in the heat insulation groove 21 can serve as an effective heat insulation medium, thereby improving the heat insulation performance between the first sheath 2 and the second sheath 3, reducing the heat conducted from the area with the highest temperature rise on the first sheath 2 to the second sheath 3, effectively reducing the temperature of the second sheath 3, preventing the temperature of the second sheath 3 from exceeding the standard, and improving the user experience.

[0051] like Fig.12 As shown, since the pitches of the helical lines formed by twisting the main core wires 1 with each other may be different, it is difficult to determine the contact position of the outer surface of the main core wire 1 and the inner surface of the first sheath 2 on the outer surface of the first sheath 2, that is, it is difficult to determine the area with the highest temperature rise on the outer surface of the first sheath 2. Therefore, in step S300, the steps are also included: S310. Wrap the thermal test paper on the outer surface of the first sheath 2; S320. Energize the main core line 1; S330. According to the color change area of ​​the thermal test paper, mark the high temperature area on the outer surface of the first sheath 2; S340. Remove the thermal test paper; S350. Processing a heat-insulating groove 21 in the high-temperature area of ​​the outer surface of the first jacket 2.

[0052] In step S310 to step S350, the thermal test paper changes color within a specific temperature range based on the characteristics of the thermal dye or thermal ink. The conductor 12 in the main core wire 1 is energized by a tool. When the conductor 12 heats up to a certain temperature, the heat is conducted to the first sheath 2 through the outer surface of the first liquid cooling tube 11 and the part in contact with the inner surface of the first sheath 2. The area corresponding to the area with the highest temperature rise on the thermal test paper and the first sheath 2 will change color first, so that the temperature change of the first sheath 2 can be intuitively displayed through the thermal test paper, so as to accurately and conveniently determine the area with the highest temperature rise on the first sheath 2. According to the color change area of ​​the thermal test paper, the high temperature area is marked on the outer surface of the first sheath 2. After removing the thermal test paper, the thermal insulation groove 21 is processed on the outer surface of the first sheath 2 according to the marked high temperature area. Among them, the depth, width and other dimensions of the thermal insulation groove 21 can be determined and adjusted according to the insulation requirements.

[0053] like Figure 8 As shown, in step S400, after the heat insulation groove 21 is processed, the second sheath 3 is prepared outside the first sheath 2, and the second sheath 3 can be processed by extrusion molding. The sum of the thickness of the first sheath 2 and the second sheath 3 can be equal to the thickness of the outer skin of a general cable, so as to avoid increasing the diameter of the liquid cooling cable.

[0054] like Figure 7 As shown, in one embodiment, before step S400, the method further includes the following steps: The notch of the heat-insulating groove 21 is covered with the Mylar member 5 .

[0055] The notch of the Mylar component 5 covering the heat insulation groove 21 can be flush with the heat insulation groove 21, so that the Mylar component 5 and the outer surface of the first sheath 2 can form a continuous surface, so that it is convenient to process the second sheath 3 by extrusion molding outside the first sheath 2. In addition, the Mylar component 5 can also support the inner surface of the second sheath 3 to improve the structural strength of the heat insulation groove 21 and protect the heat insulation groove 21, so that when the second sheath 3 is processed and in the use of the liquid-cooled cable, the shape of the heat insulation groove 21 can always remain unchanged, preventing the heat insulation groove 21 from being deformed by extrusion, causing the inner surface of the second sheath 3 to contact the bottom wall of the heat insulation groove 21 and affecting the heat insulation effect.

[0056] In another embodiment, before step S400, the method further includes the following steps: A plastic tube having the same cross-sectional shape as that of the heat insulation groove 21 is embedded in the heat insulation groove 21 .

[0057] Similarly, the plastic tube can also facilitate the processing of the second sheath 3 by extrusion molding outside the first sheath 2. In addition, the plastic tube can support the inner surface of the second sheath 3 and the bottom wall of the insulation groove 21 to improve the structural strength of the insulation groove 21 and protect the insulation groove 21, so that when processing the second sheath 3 and in the use of the liquid-cooled cable, the shape of the insulation groove 21 can always remain unchanged, preventing the insulation groove 21 from being squeezed and deformed, causing the inner surface of the second sheath 3 to contact the bottom wall of the insulation groove 21 and affecting the insulation effect.

[0058] Furthermore, before step S400, the method further includes the following steps: The thermal insulation groove 21 is filled with a porous thermal insulation member.

[0059] The porous insulation can reduce radiation heat exchange and gas molecule movement, thereby enhancing the insulation effect. The porous insulation can be a porous insulation material such as polyurethane foam, polystyrene foam, or phenolic foam. In addition, when it is necessary to cover the notch of the insulation groove 21 with the Mylar piece 5, the porous insulation is first filled in the insulation groove 21, and then the Mylar piece 5 is covered in the notch of the insulation groove 21; when it is necessary to embed a plastic pipe in the insulation groove 21, the porous insulation is first filled in the plastic pipe, and then the plastic pipe is embedded in the insulation groove 21.

[0060] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A liquid cooling cable, characterized in that: include: Main core wire (1); A first sheath (2) is sleeved outside the main core wire (1), a portion of the outer surface of the main core wire (1) is in contact with the inner surface of the first sheath (2), a heat insulation groove (21) is provided on the outer surface of the first sheath (2), and the heat insulation groove (21) corresponds to the portion where the outer surface of the main core wire (1) and the inner surface of the first sheath (2) are in contact; and The second sheath (3) is sleeved outside the first sheath (2).

2. The liquid cooling cable according to claim 1, characterized in that: The number of the main core wires (1) is at least two, and the main core wires (1) are twisted together; The number of the heat-insulating grooves (21) is at least two, and they are arranged in a one-to-one correspondence with the main core wires (1), and each of the heat-insulating grooves (21) is in a spiral shape.

3. The liquid cooling cable according to claim 1, characterized in that: The cross section of the heat insulation groove (21) is triangular or crescent-shaped.

4. The liquid cooling cable according to claim 1, characterized in that: The liquid cooling cable further comprises a Mylar component (5), wherein the Mylar component (5) covers the notch of the heat insulation groove (21); or, The liquid cooling cable also includes a plastic tube, which is embedded in the heat insulation groove (21), and the cross-sectional shape of the plastic tube is the same as the cross-sectional shape of the heat insulation groove (21).

5. The liquid cooling cable according to claim 1, characterized in that: The liquid cooling cable also includes a porous heat insulation member, and the porous heat insulation member is filled in the heat insulation groove (21).

6. The liquid cooling cable according to any one of claims 1 to 5, characterized in that: The main core wire (1) comprises a first liquid cooling tube (11) and a conductor (12); the first liquid cooling tube (11) is provided with a first channel (111) for filling with cooling liquid; the conductor (12) is inserted into the first channel (111).

7. The liquid cooling cable according to claim 6, characterized in that: The liquid cooling cable further comprises a second liquid cooling tube (4) inserted into the first sheath (2), the second liquid cooling tube (4) being provided with a second channel (41) for filling with cooling liquid, the cooling liquid in the second channel (41) flowing in the opposite direction to the cooling liquid in the first channel (111).

8. A method for processing a liquid cooling cable, characterized in that: Includes steps: Preparing a main core wire (1); Preparing a first sheath (2) outside the main core wire (1); A heat-insulating groove (21) is machined on the outer surface of the first sheath (2) to correspond to a portion of the outer surface of the main core wire (1) in contact with the inner surface of the first sheath (2); A second sheath (3) is prepared outside the first sheath (2).

9. The method for processing a liquid cooling cable according to claim 8, characterized in that: In the step of machining the heat-insulating groove (21) corresponding to the portion in contact with the outer surface of the main core wire (1) and the inner surface of the first sheath (2) on the outer surface of the first sheath (2), the following steps are also included: Wrapping a thermal test paper on the outer surface of the first sheath (2); Applying electricity to the main core wire (1); According to the color change area of ​​the thermosensitive test paper, a high temperature area is marked on the outer surface of the first sheath (2); Remove the thermal test paper; A heat-insulating groove (21) is machined in the high-temperature region on the outer surface of the first jacket (2).

10. The method for processing a liquid cooling cable according to claim 8, characterized in that: Before the step of preparing the second sheath (3) outside the first sheath (2), the method further comprises the following steps: The notch of the heat-insulating groove (21) is covered with a Mylar piece (5); or, A plastic tube having a cross-sectional shape identical to that of the heat insulation groove (21) is embedded in the heat insulation groove (21).

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