Cable and electric equipment

Abstract

The utility model relates to a cable and electric equipment, and the cable comprises a cable wire which is used for achieving the transmission of electric energy and / or signals. The cooling pipe is used for conveying a cooling working medium; the sheath is used for surrounding the cable and / or the cooling pipe to at least form an in-sheath space; the soaking layer is arranged in the in-sleeve space; wherein the soaking layer is in contact with at least one of the plurality of cables so as to transfer heat of the contacted cable to the soaking layer. The cable and the electric equipment have the beneficial effects that the cooling efficiency is improved by arranging the soaking layer in contact with the cable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cables, and in particular to a cable and an electrical equipment. BACKGROUND

[0002] The cable often has power lines for transmitting electric energy in a main loop and control lines for transmitting signals; the cable generates a large amount of heat when transmitting a large current.

[0003] In the related art, a cooling pipe is arranged inside the cable, so that the cable is cooled by a cooling working medium in the cooling pipe.

[0004] However, in the related art, no effective heat transfer path is provided for the cables except for the direct contact between the cables and the contact between the cooling pipe and the cables, so that part of the cables form a high-temperature area that cannot exchange heat with the remaining part. CONTENT OF THE UTILITY MODEL

[0005] The present application provides a cable, which improves the cooling efficiency of the cable to at least partially solve the above technical problems.

[0006] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, a cable is provided, comprising:

[0007] Cables for realizing the transmission of electric energy and / or signals;

[0008] A cooling pipe for realizing the transmission of a cooling working medium;

[0009] A sheath for surrounding the cables and / or the cooling pipe to form at least an inner space of the sheath; and

[0010] A heat equalizing layer arranged in the inner space of the sheath;

[0011] The heat equalizing layer is in contact with at least one of the plurality of cables to transfer the heat of the contacted cable to the heat equalizing layer.

[0012] Optionally, in some embodiments of the present application, the heat equalizing layer is in contact with all of the plurality of cables to transfer the heat of the contacted cable to the heat equalizing layer.

[0013] Optionally, in some embodiments of the present application, the heat equalizing layer is made of a conductor material to serve as a protective conductor of the cable.

[0014] Optionally, in some embodiments of the present application, the heat equalizing layer is in contact with the cooling pipe to transfer the heat of the cable to the cooling pipe through the heat equalizing layer.

[0015] Optionally, in some embodiments of the present application, the cooling pipe comprises:

[0016] a liquid inlet pipe for introducing the cooling medium into the cable; and

[0017] a liquid outlet pipe for leading the cooling medium out of the cable.

[0018] Optionally, in some embodiments of the present application, the cable comprises a power line for transmitting electric energy.

[0019] Optionally, in some embodiments of the present application, the liquid inlet pipe is in contact with the power line to transfer heat between the power line and the liquid inlet pipe.

[0020] Optionally, in some embodiments of the present application, the liquid inlet pipe is arranged in parallel with the power line so that the liquid inlet pipe and the power line have the same extension direction.

[0021] Optionally, in some embodiments of the present application, a plurality of the power lines are arranged at different positions around the liquid inlet pipe.

[0022] Optionally, in some embodiments of the present application, the liquid inlet pipe is arranged between two of the power lines.

[0023] Optionally, in some embodiments of the present application, the plurality of the power lines are symmetrically arranged relative to the liquid inlet pipe.

[0024] Optionally, in some embodiments of the present application, the liquid inlet pipe is arranged at the center of the cable.

[0025] Optionally, in some embodiments of the present application, the liquid outlet pipe is provided in two.

[0026] Optionally, in some embodiments of the present application, the liquid inlet pipe is arranged between two of the liquid outlet pipes.

[0027] Optionally, in some embodiments of the present application, the outer radius R L of the liquid inlet pipe and the outer radius R d of the power line satisfy the formula:

[0028] R L = 0.5 × D Li + d Li ,

[0029] R d = 0.5 × D d ,

[0030]

[0031] wherein D LiD is the inner diameter of the inlet pipe, d Li D is the wall thickness of the inlet pipe d D is the diameter of the power line, x is the total number of the cable and the cooling pipe in contact with the inlet pipe.

[0032] Optionally, in some embodiments of the present application, the outlet pipe is in contact with the uniform heating layer to transfer heat between the outlet pipe and the uniform heating layer.

[0033] Optionally, in some embodiments of the present application, the outlet pipe is arranged between the uniform heating layer and the inlet pipe; and / or

[0034] The uniform heating layer is arranged between the inlet pipe and the outlet pipe.

[0035] Optionally, in some embodiments of the present application, a sandwich space is formed between the sheath and the uniform heating layer, and the outlet pipe is arranged in the sandwich space.

[0036] Optionally, in some embodiments of the present application, the outlet pipe extends in a manner of winding the uniform heating layer.

[0037] Optionally, in some embodiments of the present application, the outlet pipe extends along a spiral line winding the uniform heating layer.

[0038] Optionally, in some embodiments of the present application, the inner diameter D Lo satisfies the following formula:

[0039] D Lo = D - [D Li + 2 × (d Li + D d + 2d Lo + h1 + h2)].

[0040] D Li D is the inner diameter of the inlet pipe, d Li D is the wall thickness of the inlet pipe, d Lo D is the wall thickness of the outlet pipe, D d D is the diameter of the power line, h1 is the thickness of the uniform heating layer, h2 is the thickness of the sheath, and D is the overall diameter of the cable.

[0041] Optionally, in some embodiments of the present application, the cable further comprises: a support body arranged around the cooling pipe and / or the power line to support the cooling pipe and / or the power line.

[0042] Optionally, in some embodiments of the present application, the support body is arranged between the cooling pipe and the power line.

[0043] Optionally, in some embodiments of the present application, the cable further comprises a control line for transmitting signals.

[0044] Optionally, in some embodiments of the present application, the control line is arranged between two power lines.

[0045] Optionally, in some embodiments of the present application, the control line is arranged between two power lines.

[0046] Optionally, in some embodiments of the present application, the heat equalizing layer is configured to have a sleeve structure.

[0047] Optionally, in some embodiments of the present application, the cable and the heat equalizing layer have the same extension direction.

[0048] Optionally, in some embodiments of the present application, the power line has a circular cross section, and the heat equalizing layer is tangent to the outer contour of the power line.

[0049] According to a second aspect of the present application, there is provided an electrical device comprising the cable as described above.

[0050] The present application has the beneficial effect of providing a heat equalizing layer in contact with the internal cable to avoid local overheating of the cable, thereby improving the uniformity of the cooling effect of the cable.

[0051] More specifically, some embodiments of the present application can have the following specific beneficial effects:

[0052] The heat equalizing layer is used as a protective conductor of the cable, reducing the size occupied by the additional structure;

[0053] Multiple power lines are used to contact the liquid inlet pipe to form a new heat transfer path;

[0054] The support body and the low-voltage cable are arranged in the gap between the power line and the liquid inlet pipe, increasing the space utilization of the cable.

[0055] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0057] For a more complete understanding of the present application and the advantages thereof, reference is now made to the following descriptions taken in connection with the accompanying drawings in which like numbers represent like parts.

[0058] Figure 1 is a cross-sectional schematic view of a cable provided in an exemplary embodiment of the present application;

[0059] Figure 2 is a cross-sectional schematic view of another cable provided in an exemplary embodiment of the present application;

[0060] Figure 3 is a cross-sectional schematic view of another cable provided in an exemplary embodiment of the present application;

[0061] Figure 4 is a structural schematic view of a liquid outlet pipe provided in an exemplary embodiment of the present application;

[0062] Figure 5 is a distribution schematic view of a control line provided in an exemplary embodiment of the present application;

[0063] Figure 6 is a distribution schematic view of another control line provided in an exemplary embodiment of the present application;

[0064] Figure 7 is a structural schematic view of an electric device provided in an exemplary embodiment of the present application.

[0065] BRIEF DESCRIPTION OF DRAWINGS

[0066] 1. an electric device;

[0067] 10. a cable;

[0068] 100. a cable; 110. a power line; 120. a support body; 130. a control line bundle; 131. a control line;

[0069] 200. a cooling pipe; 210. a liquid inlet pipe; 220. a liquid outlet pipe;

[0070] 300. a sheath;

[0071] 400. a uniform heating layer. DETAILED DESCRIPTION

[0072] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0073] In the related art, large current charging usually uses a dedicated high-power charging cable, but as the charging current increases, the heat generated by the charging cable also increases. To solve this problem, the related art mostly uses liquid-cooled cables. In these liquid-cooled cables, the cooling efficiency of the liquid-cooled cable is low due to the uneven distribution of the cables inside the liquid-cooled cable, which further leads to the problem of local overheating of the liquid-cooled cable. In addition, these liquid-cooled cables have problems such as bending and winding during use. Due to the large size of the wire core and cooling pipeline of the liquid-cooled cable, the cable 10 is difficult to bend, and even the problem of core breakage may occur.

[0074] Referring to Figure 1 As shown in FIG. 1, according to a first aspect of the present application, the present application provides a cable 10, comprising a cable 100, a cooling pipe 200, a heat equalizing layer 400 and a sheath 300, wherein the cable 100 is used to realize the transmission of electric energy and / or signal; the cooling pipe 200 is used to realize the transmission of cooling medium; the sheath 300 is used to surround the cable 100 and / or the cooling pipe 200 to form at least an inner space; the heat equalizing layer 400 is arranged in the inner space, wherein the heat equalizing layer 400 is in contact with at least one of the plurality of cables 100 to transfer the heat of the contacted cable 100 to the heat equalizing layer 400, and in some more specific embodiments, the heat equalizing layer 400 is in contact with all of the plurality of cables 100 to transfer the heat of all of the contacted cables 100 to the heat equalizing layer.

[0075] In some embodiments of the present application, the heat equalizing layer 400 is configured to have a sleeve structure, and the heat equalizing layer 400 has the same extension direction as the cable 100. By arranging the heat equalizing layer 400, the heat generated by the cable 100 can be absorbed and evenly distributed, which is beneficial to enhance the heat dissipation effect of the surface of the cable 10, and the heat transfer between the heat equalizing layer 400 and the sheath 300 can also make the temperature of the surface of the sheath 300 more uniform, improving the comfort of the user when holding the cable 10.

[0076] In some embodiments of the present application, the heat equalizing layer 400 is made of a metal material, and specifically, the material of the heat equalizing layer 400 can be any one of copper, aluminum, silver, tinned copper or silver-plated copper. By arranging the metal heat equalizing layer 400 with certain flexibility, the cable 10 can have certain bending ability; by the metal material, the heat generated by the cable 100 can also be fully absorbed and evenly distributed, enhancing the heat dissipation effect of the surface of the cable 10. Specifically, even if the temperature of the internal conductor of the cable 100 is uneven, the uneven temperature is transmitted to the heat equalizing layer 400. Since the heat equalizing layer 400 is metal, after absorbing the internal heat, the heat equalizing layer 400 itself will also be uniformly heated, causing the temperature of the cable 10 to rise uniformly.

[0077] In some specific embodiments, the sheath 300 can be made of polyurethane, cross-linked polyethylene, fluoroplastic, or polyimide, etc. which have excellent insulation, heat resistance, and chemical corrosion resistance, and have certain mechanical strength. At the same time, the sheath 300 has a certain thickness, which can protect the cables inside the sheath 300.

[0078] It should be noted that, in some embodiments of the present application, the heat conduction layer 400 is made of a conductor material to serve as a protective conductor of the cable 10. More specifically, the heat conduction layer 400 is a ground wire inside the cable 10. Therefore, although the heat conduction layer 400 has conductivity in the present application, the heat conduction layer 400 itself is not electrified during the operation of the cable 10. Through this arrangement, the cable 10 does not need to use an additional ground wire, compared with the cable 10 in the related art, the cable 10 of the present application can significantly reduce the cross-sectional size of the cable 10, while also enhancing the heat dissipation effect.

[0079] Referring to Figure 2 It should be noted that, in some embodiments of the present application, the heat conduction layer 400 is in contact with the cooling pipe 200 to transfer the heat of the cable 100 to the cooling pipe 200 through the heat conduction layer 400.

[0080] More specifically, the cooling pipe 200 includes a liquid inlet pipe 210, wherein the liquid inlet pipe 210 is used to introduce a cooling working medium into the cable 10. It should be noted that, in some embodiments of the present application, the cooling working medium can be a mixture of ethylene glycol and water or other non-insulating solutions. The cable 100 includes a power line 110 for transmitting electrical energy. The liquid inlet pipe 210 is in contact with the power line 110 to transfer heat between the power line 110 and the liquid inlet pipe 210.

[0081] It should be noted that the power line 110 of the present application is a direct current high voltage line inside the cable 10, in the related art, the direct current high voltage line inside the cable 10 usually includes a positive direct current line and a negative direct current line, compared with the power line 110 in the related art, the power line 110 of the present application can have a smaller diameter while having more quantity, through this arrangement, the heat generation of the power line 110 can be dispersed, and the heat exchange can be fully carried out through the contact of the power line 110 with the liquid inlet pipe 210 and the heat conduction layer 400, which is conducive to improving the overall heat dissipation efficiency of the cable 10.

[0082] In some embodiments, the liquid inlet pipe 210 is arranged side by side with the power line 110 so that the liquid inlet pipe 210 and the power line 110 have the same extension direction, a plurality of power lines 110 are arranged at different positions around the liquid inlet pipe 210, in the radial direction of the cable 10, the liquid inlet pipe 210 is arranged between two power lines 110, and the plurality of power lines 110 are symmetrically arranged relative to the liquid inlet pipe 210. Through the above arrangement, the liquid inlet pipe can be in contact with each power line throughout.

[0083] It should be noted that the radial direction and the circumferential direction of the present application are relative to the central axis of the cable, which is generally a straight line in the natural state of the cable 10, i.e., the axial direction of the present application, but in the specific laying, the central axis can be a curve with the bending of the cable 10, at which time a point of the central axis on a cross section of the cable 10 can be taken as the center to define the radial direction and the circumferential direction of the present application. Of course, the radial direction and the circumferential direction of the present application only represent relative positional relationships.

[0084] More specifically, referring to FIG. 1, the cable 10 includes a plurality of power lines 110, a liquid inlet pipe 210, a liquid outlet pipe 220, a heat uniformizing layer 400, and a sheath 300. Figure 2 As shown, the liquid inlet pipe 210 is arranged at the center of the cable 100, on the basis of which the cable 100 of the present application includes a plurality of power lines 110 with the same diameter and uniformly arranged outside the liquid inlet pipe 210, each power line 110 is in contact with the liquid inlet pipe 210, and each power line 110 is also in contact with the heat uniformizing layer 400. By arranging the liquid inlet pipe 210 at the center of the cable 100, the liquid inlet pipe 210 can be in sufficient contact with other cables in the cable 100, thereby enhancing the heat dissipation effect of the cooling pipe 200. In addition, the liquid inlet pipe 210 of the present application is located at the center of the cable 100 and also at the center of the cable 10, and the liquid inlet pipe 210 is in contact with each power line 110, which can effectively take away the heat generated by each power line 110.

[0085] As shown in FIG. 1, the cable 10 includes a plurality of power lines 110, a liquid inlet pipe 210, a liquid outlet pipe 220, a heat uniformizing layer 400, and a sheath 300. Figure 2 As shown in FIG. 1, the cable 10 includes a plurality of power lines 110, a liquid inlet pipe 210, a liquid outlet pipe 220, a heat uniformizing layer 400, and a sheath 300.

[0086] It should be noted that in some cables 10 with small current carrying capacity, the liquid outlet pipe 220 is arranged between the heat uniformizing layer 400 and the liquid inlet pipe 210, i.e., the liquid outlet pipe 220 can be arranged in the cable 100, and the liquid outlet pipe 220 is in contact with the liquid inlet pipe 210, the power lines 110, and the heat uniformizing layer 400. In some specific examples, the outer diameter of the liquid outlet pipe 220 can be the same as that of the power lines 110, so that the heat uniformizing layer 400 can be in uniform contact with each power line 110. Through this arrangement, the heat generated by the power lines 110 is mainly taken away by the liquid inlet pipe 210, and the remaining heat is absorbed by the heat uniformizing layer 400 and taken away by the liquid outlet pipe 220 and the natural convection of the sheath 300 and air.

[0087] As shown in FIG. 1, the cable 10 includes a plurality of power lines 110, a liquid inlet pipe 210, a liquid outlet pipe 220, a heat uniformizing layer 400, and a sheath 300. Figure 3As shown, in some embodiments of the present application, the liquid outlet pipe 220 can also be arranged between the heat uniform layer 400 and the sheath 300 and be attached to the heat uniform layer 400 to meet the heat dissipation requirement of the cable 10 with large current carrying capacity. In this embodiment, a sandwich space is formed between the sheath 300 and the heat uniform layer 400, and the liquid outlet pipe 220 is arranged in the sandwich space, and in addition, the sandwich space also has a certain gap. In some cooling pipes 200 with only one inlet and one outlet, only one liquid inlet pipe 210 and one liquid outlet pipe 220 can be arranged. When the cable 10 is working, the heat generated by the power line 110 is mainly taken away by the liquid inlet pipe 210 in contact with the inner side, and another part of the heat is transmitted to the outer heat uniform layer 400 and then taken away by the outer liquid outlet pipe 220. In some other embodiments, one liquid inlet pipe 210 and two liquid outlet pipes 220 can also be arranged in the cable 10, and in order to ensure uniform temperature distribution, the liquid inlet pipe 210 can be arranged between the two liquid outlet pipes 220 in the radial direction of the cable 10. In addition, in some embodiments, according to specific needs, more than two liquid outlet pipes can also be arranged, which is not limited in the present application.

[0088] Referring to Figure 4 As shown, in some examples of the present application, the liquid outlet pipe 220 extends in the form of winding the heat uniform layer 400, and more specifically, the liquid outlet pipe 220 extends along a spiral line winding the heat uniform layer 400. The spiral liquid outlet pipe 220 can increase the amount of cooling liquid inside the cable 10 and make the cooling pipe have sufficient time to exchange heat with the power line 110, but the spiral liquid outlet pipe 220 also increases the flow time of the cooling liquid in the cable 10, so the size of the liquid outlet pipe 220 also needs to be considered.

[0089] Specifically, in some embodiments, the inner diameter D Lo satisfies the following formula:

[0090] D Lo = D - [D Li + 2 x (d Li + D d + 2d Lo + h1 + h2)],

[0091] wherein D Li is the inner diameter of the liquid inlet pipe 210, d Li is the wall thickness of the liquid inlet pipe 210, D Lo is the inner diameter of the liquid outlet pipe 220, d Lo is the wall thickness of the liquid outlet pipe 220, D d is the diameter of the power line 110, h1 is the thickness of the heat uniform layer 400, and h2 is the thickness of the sheath 300.

[0092] When the wire diameter of the cable 10 is large, the liquid outlet pipe 220 is spirally wound on the outer wall of the heat equalizing layer 400 to take away the heat on the outside and prevent the temperature of the sheath 300 from being too high, which is conducive to increasing the human-machine comfort. In addition, the spiral pipe can offset the stress by deforming along the length direction of the cable 10 when the cable 10 is bent, which is conducive to improving the softness of the cable 10.

[0093] It can be understood that the outer radius of the liquid inlet pipe 210 in the present application is R L = 0.5 x D Li + d Li , the outer diameter of the power line 110 is R d = 0.5 x D d , and the total number of the cable lines and the cooling pipe 200 in contact with the liquid inlet pipe 210 is x. Therefore, the outer radius R L of the liquid inlet pipe 210 and the outer radius R d of the power line 110 satisfy the formula:

[0094]

[0095] It should be noted that in the related art, the power line 110 includes positive lines and negative lines, and the number of the two is the same. Although the number of the power line in the present application is large and the size is small, the number of the power line 110 can also be set to an even number according to the positive lines and the negative lines in the related art, that is, x is an even number. It can be understood that the number of the power line 110 can also be set to an odd number, which is not limited in the present application. In addition, the diameter of the liquid inlet pipe 210 and the diameter of the power line 110 can be flexibly adjusted according to the above formula, as long as the outer tangent circle of the liquid inlet pipe 210 and the outer tangent circle of each power line 110 in the periphery are in contact with each other to ensure uniform heat exchange between the liquid inlet pipe 210 and the power line 110.

[0096] It should be noted that the number of turns of the liquid outlet pipe 220 is selected according to the softness of the cable 10 and the flow rate of the cooling pump. The softer the cable 10 is, the fewer the number of turns of the spiral is, and the smaller the flow rate of the cooling pump is, the greater the number of turns of the spiral is. The specific number of turns of the liquid outlet pipe 220 is not limited in the present application.

[0097] Referring to FIGS. Figure 5 and Figure 6 , in some embodiments of the present application, the cable 100 further includes a support body 120 for ensuring the relative position between the liquid inlet pipe 210 and the power line 110. It should be noted that the support body 120 is arranged in the gap between the liquid inlet pipe 210 and the two power lines 110 to increase the space utilization.

[0098] It should be noted that the support can be made of rigid or soft materials. More specifically, in some embodiments, when the support is made of a relatively rigid material with a certain shape, the support 120 can have a circular cross-section, and the radius R of the support 120 is... g Satisfying the formula:

[0099]

[0100] Among them, R G R is the maximum radius of the support body 120. L R is the outer radius of the inlet pipe 210. d Let D be the outer radius of the dynamic line 110. Li d is the inner diameter of the inlet pipe 210. Li D is the wall thickness of the inlet pipe 210. d x is the diameter of power line 110, and x is the number of cables 100.

[0101] It should be noted that the radius R of the support body 120 g It can be less than R G However, it cannot be greater than R. G When the radius of the support is less than R G When the inlet pipe 210 and the surrounding power line 110 are squeezed, they can slide slightly relative to each other, consuming the stress generated by the squeeze.

[0102] Reference Figure 5 As shown, in some embodiments of this application, the cable 100 further includes multiple control lines 131 for signal transmission. Specifically, in the circumferential direction of the cable, the control lines 131 are distributed between the two power lines 110, and the control lines 131 are evenly distributed in the gap between the heat dissipation layer 400 and the power lines 110. It should be noted that the control lines 131 are low-voltage wire bundles inside the cable 10, and the current flowing on them is very small, so their heat generation is negligible. More specifically, the outer diameter of the control lines 131 is smaller than the outer diameter of the power lines 110, and the control lines 131 are tangent to the power lines 110 and to both power lines 110. Through the above arrangement, the space utilization rate inside the cable 10 can also be increased.

[0103] Reference Figure 6As shown, in some embodiments of the present application, the plurality of control lines 131 included in the cable 100 can also be formed into control line bundles 130, i.e., in the circumferential direction of the cable 10, the control lines 131 are bundled between any two power lines 110, and the control line bundle 130 is in contact with the heat uniform layer 400 and / or the liquid inlet pipe 210. In this embodiment, the outer diameter of the control line bundle 130 can be the same as the outer diameter of the power line 110, or the outer diameter of the control line bundle 130 can be slightly smaller than the outer diameter of the power line 110, to ensure uniform contact between the heat uniform layer 400 and each power line 110.

[0104] It should be noted that in the calculation formula in some embodiments described above, when the control lines 131 are distributed in a dispersed manner in the cable 10, the value of x is the total number of the power lines 110 and the liquid outlet pipe 220; and when the control lines 131 are arranged in the form of the control line bundle 130 in the cable 10, the value of x is the total number of the power lines 110, the liquid outlet pipe 220 and the control line bundle 130.

[0105] It should be noted that in some embodiments of the present application, the power lines 110 have a circular cross-section, and the heat uniform layer 400 is tangent to the outer contour of the power lines 110. In addition, the spatial distribution of the power lines 110, the heat uniform layer 400, the cooling pipe 200, the support body 120 and the control lines 131 or control line bundles 130 inside the cable 10 should be as tangent as possible. Through this arrangement, when the cable 10 is bent, the stress can be offset by the overall deformation, preventing a single cable from being stressed, thereby increasing the service life of the cable 10.

[0106] During operation, the power lines 110 inside the cable 10 of the present application generate Joule heat due to their own resistance. The heat inside the power lines 110 goes in three ways:

[0107] Way one: mainly through the temperature rise of all materials such as the power lines 110 and the sheath 300 to absorb heat;

[0108] Way two: heat exchange with the cooling pipe 200, and the heat is carried away by the liquid;

[0109] Way three: heat is transmitted from the conductor to the outermost layer of the cable 10, and the sheath 300 of the cable 10 exchanges heat with the air.

[0110] The above three ways occur simultaneously and in different proportions.

[0111] In the initial heating stage of the cable 10, it mainly relies on heat absorption by itself, and when it reaches a steady state, the cable 10 no longer absorbs heat, and the temperature of the cable 10 no longer increases. At this time, heat is only carried away by way two and way three. The heat uniform layer 400 is located between the power lines 110 and the sheath 300, and if there is no heat uniform layer 400, i.e., the conductor is directly in contact with the sheath 300:

[0112] For the first path, no effect.

[0113] For the second path, the greater the contact area between the power line 110 and the cooling pipe 200, the faster the power line 110 dissipates heat, and the smaller the temperature rise of the power line 110 itself. That is, the power line 110 that contacts the cooling pipe 200 more has a lower temperature at steady state, and the power line 110 that contacts the cooling pipe 200 less has a higher temperature at steady state.

[0114] Ideally, the inner inlet pipe has the same contact area with each power line 110, but the outer outlet pipe has different contact areas with each power line 110, so that some power lines 110 have a high temperature and some power lines 110 have a low temperature. When heat is dissipated through the third path, the power line 110 with a high temperature will cause the temperature of the sheath 300 in contact with the power line 110 to be high, even higher than the standard. Ultimately, the outer surface of the sheath 300 has some places with a high temperature and some places with a low temperature. Local overheating will accelerate the aging and deformation. The present application absorbs the heat generated by the cable 100 and makes the heat distribution uniform by setting the heat equalizing layer 400, which is conducive to enhancing the heat dissipation effect of the surface of the cable 10. At the same time, the heat transfer between the heat equalizing layer 400 and the sheath 300 can also make the temperature of the surface of the sheath 300 more uniform, improving the comfort of the user when gripping the cable 10.

[0115] Referring to Figure 7 According to the second aspect of the present application, a power consuming device 1 is provided, which includes the above-mentioned cable 10. The power consuming device 1 has all the beneficial effects of the above-mentioned cable 10, which will not be repeated here.

[0116] The power consuming device can be a charging pile for charging a plug-in hybrid electric vehicle or a new energy vehicle, which is not limited in the present application.

[0117] It should be noted that in the cable 10 of the present application, the inlet pipe 210 and the outlet pipe 220 (or the outlet pipe 220) are connected inside the charging gun head, and an insulating material with strong heat exchange capacity is used as a carrier to connect the inlet pipe 210 and the outlet pipe 220 (or the outlet pipe 220) to the carrier. In some embodiments, the carrier can be a ceramic block or a ceramic sheet with a flow channel inside.

[0118] In the description of the present application, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0119] In the above embodiments, the description of each embodiment is focused on, and the part not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0120] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0121] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiment without departing from the technical solution content of the present application and in accordance with the technical essence of the present application still belongs to the scope of the technical solution of the present application.

Claims

1. A cable, characterized by Comprising: cables for transmitting electric power and / or signals; cooling pipes for transmitting cooling medium; a sheath for surrounding the cables and / or the cooling pipes to form at least a jacketed space; and a heat equalizing layer disposed in the jacketed space; wherein the heat equalizing layer is in contact with at least one of the cables to transfer heat of the contacted cable to the heat equalizing layer.

2. The cable according to claim 1, wherein: the heat equalizing layer is in contact with all of the cables to transfer heat of the contacted cables to the heat equalizing layer. wherein 3. The cable according to claim 1, wherein: the heat equalizing layer is made of a conductor material to serve as a protective conductor of the cable.

4. The cable according to claim 1, wherein: the heat equalizing layer is in contact with the cooling pipes to transfer heat of the cables to the cooling pipes through the heat equalizing layer. wherein, wherein:

5. The cable of claim 1, the cooling pipes comprise: an inlet pipe for introducing cooling medium into the cable; and an outlet pipe for leading cooling medium out of the cable.

6. The cable according to claim 5, wherein: the cables comprise power lines for transmitting electric power. wherein 7. The cable according to claim 6, wherein: the inlet pipe is in contact with the power lines to transfer heat between the power lines and the inlet pipe. wherein, 8. The cable according to claim 7, wherein: the inlet pipe is disposed in parallel with the power lines to have the same extension direction as the power lines. wherein 9. The cable according to claim 8, wherein: a plurality of the power lines are disposed at different positions around the inlet pipe. wherein 10. The cable according to claim 9, wherein: the inlet pipe is disposed between two of the power lines. wherein 11. The cable according to claim 10, wherein: the power lines are symmetrically disposed with respect to the inlet pipe. wherein 12. The cable according to claim 11, wherein: the inlet pipe is disposed at the center of the cable. wherein 13. The cable according to claim 6, wherein: the outlet pipe is provided in two. wherein 14. The cable according to claim 13, wherein: the inlet pipe is disposed between two of the outlet pipes. wherein 15. The cable according to claim 6, wherein:

16. The cable according to claim 6, wherein: wherein The outer radius R of the inlet pipe L The outer radius R of the power line d The formula is satisfied: R L = 0.5 x D Li + d Li , R d = 0.5 x D d , where D Li is the inner diameter of the liquid inlet pipe, d Li is the wall thickness of the liquid inlet pipe, D d is the diameter of the power line, and x is the total number of the cable and the cooling pipe in contact with the liquid inlet pipe. the outlet pipe is in contact with the heat equalizing layer to transfer heat between the outlet pipe and the heat equalizing layer. wherein, 17. The cable according to claim 16, wherein: the outlet pipe is disposed between the heat equalizing layer and the inlet pipe; and / or wherein, the heat equalizing layer is disposed between the inlet pipe and the outlet pipe.

18. The cable according to claim 17, wherein: a sandwiched space is formed between the sheath and the heat equalizing layer, and the outlet pipe is disposed in the sandwiched space. wherein, 19. The cable according to claim 18, wherein: the outlet pipe extends in a manner of winding around the heat equalizing layer. wherein ​ 20. The cable according to claim 19, wherein: wherein the liquid outlet tube extends along a helical line winding the uniform heating layer.

21. The cable according to claim 20, wherein: wherein The inner diameter D of the liquid outlet pipe Lo satisfies the following equation: D Lo = D - [D Li + 2 x (d Li + D d + 2d Lo + h1+ h2)], D Li is the inner diameter of the liquid inlet pipe, d Li is the wall thickness of the liquid inlet pipe, d Lo is the wall thickness of the liquid outlet pipe, D d is the diameter of the power line, h1 is the thickness of the heat equalizing layer, h2 is the thickness of the sheath, and D is the overall diameter of the cable.

22. The cable of any of claims 6 to 20, characterized by: further comprising: a support body disposed around the cooling tube and / or the power line to support the cooling tube and / or the power line.

23. The cable according to claim 22, wherein: wherein the support body is disposed between the cooling tube and the power line.

24. The cable according to any one of claims 6 to 20, wherein: wherein, the cable further comprises: a control line for transmitting a signal.

25. The cable according to claim 24, wherein: wherein the control line is dispersedly disposed between two of the power lines.

26. The cable according to claim 24, wherein: wherein, the control line is collectively disposed between two of the power lines.

27. The cable according to claim 1, wherein: wherein, the uniform heating layer is configured to have a sleeve structure.

28. The cable according to claim 1, wherein: wherein, the cable and the uniform heating layer have the same extension direction.

29. The cable according to claim 6, wherein: wherein the power line has a circular cross section, and the uniform heating layer is tangent to an outer contour of the power line.

30. An electrical device, comprising: a cable according to any one of claims 1 to 29.

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