WO2020020262A1 - 一种传输线缆以及电器设备 - Google Patents

一种传输线缆以及电器设备 Download PDF

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Publication number
WO2020020262A1
WO2020020262A1 PCT/CN2019/097597 CN2019097597W WO2020020262A1 WO 2020020262 A1 WO2020020262 A1 WO 2020020262A1 CN 2019097597 W CN2019097597 W CN 2019097597W WO 2020020262 A1 WO2020020262 A1 WO 2020020262A1
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WIPO (PCT)
Prior art keywords
power transmission
conductive layer
transmission cable
transmission line
layer
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PCT/CN2019/097597
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English (en)
French (fr)
Inventor
申英强
刘逸飞
刘靖
Original Assignee
中申(宁波)电力科技有限公司
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Publication of WO2020020262A1 publication Critical patent/WO2020020262A1/zh

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/02Disposition of insulation
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00Power cables
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00Power cables
    • H01B9/02Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00Power cables
    • H01B9/04Concentric cables

Definitions

  • the present invention relates to the technical field of power transmission, and in particular, to a transmission cable and electrical equipment.
  • a power cable is generally made of one or more mutually insulated conductors and an outer insulating protective layer, which transmits power from one place to another.
  • the cable has the characteristics of internal current and external insulation.
  • the inner conductors of the existing power cables are generally arranged side by side, for example, the phase wires 11 and the neutral wires 12 insulated from each other, and the outer sides of the phase wires 11 and the neutral wires 12 are covered.
  • phase line 11 has an exposed point
  • the human body, the phase line 11 and the ground form a conductive circuit, which is likely to cause electric shock
  • the phase line 11 and the neutral line 12 There are naked points.
  • the human body is in contact with two naked points at the same time, the human body and the two naked points form a conductive loop, which is likely to cause an electric shock, thereby causing the transmission cable to be more prone to electric shock.
  • the technical problem to be solved by the present invention is to overcome the defect of high possibility of electric shock of a transmission cable in the prior art.
  • the present invention provides a transmission cable, including:
  • a first insulation layer is coated on the outside of each of the first power transmission lines
  • the conductive layer is coated on the outside of all the first insulating layers; wherein the conductive layer is used for power transmission.
  • a second power transmission line is further provided in the cladding area of the conductive layer, the second power transmission line is connected to the conductive layer, and an axial extension direction of the second power transmission line and the Mentioned conductive layer The axial direction is the same.
  • the number of the first power transmission lines is three, which are respectively used for transmitting three-phase power; the conductive layer and the second power transmission line are neutral lines.
  • the number of the first power transmission lines is one.
  • a second insulating layer is coated on the outside of the conductive layer.
  • the conductive layer is a braided mesh layer; wherein the conductive layer includes a plurality of wires, and all the wires form the braided mesh layer.
  • a cross-sectional area of the conducting wire is the same as a cross-sectional area of the first power transmission line.
  • the present invention also provides an electrical device, including the transmission cable according to any one of the above, and an electrical device body; the transmission cable is used to transmit electrical energy to the electrical device body.
  • the transmission cable adopts a mutually insulated first power transmission line and a conductive layer covering the outside of the first power transmission line for power transmission, which can avoid simultaneous contact of the human body Human injury caused by the first power transmission lines arranged in parallel avoids the possibility of electric shock caused by the transmission cables.
  • the transmission cable provided in the embodiment of the present invention is further provided with a second power transmission line connected to the conductive layer in the cladding area of the conductive layer to improve the conductive performance of the conductive layer to ensure that it can be applied. Used in electrical equipment or power systems with large current transmission.
  • the transmission cable provided by the embodiment of the present invention can improve the insulation of the transmission cable from the outside by providing a second insulating layer on the outside of the conductive layer, and avoid the occurrence of an electric shock accident.
  • the transmission cable provided by the embodiment of the present invention reduces the possibility of disconnection of the conductive layer by forming a mesh layer on the conductive layer, that is, covering a plurality of wires on the outside of the first insulating layer, thereby The exposure possibility of the first power transmission line on the innermost side of the transmission cable can be reduced, and the human body is prevented from contacting the wire layer and the first power transmission line at the same time.
  • the transmission cable provided by the embodiment of the present invention can better ensure power transmission by setting the cross-sectional area of the wire to be the same as the cross-sectional area of the first power transmission line.
  • FIG. 1 is a specific schematic structural diagram of a transmission cable in the prior art
  • FIG. 2 is a specific schematic structural diagram of a transmission cable in an embodiment of the present invention.
  • FIG. 3 is another specific schematic structural diagram of a transmission cable according to an embodiment of the present invention.
  • FIG. 4 is another specific schematic structural diagram of a transmission cable in an embodiment of the present invention.
  • FIG. 5 is another specific schematic structural diagram of a transmission cable according to an embodiment of the present invention.
  • FIG. 6 is another specific schematic structural diagram of a transmission cable according to an embodiment of the present invention.
  • FIG. 1 11-phase line; 12-neutral line; 13-insulation layer;
  • FIG. 2-FIG. 6 1- first power transmission line; 2-first insulating layer; 3-conductive layer; 4-second insulating layer; 5-second power transmission line
  • the electrical equipment in the present invention may be a power tool, a home appliance, or an electrical equipment in a public facility, etc., as long as the structure of the transmission cable in the electrical equipment is The first power transmission line, the first insulation layer, and the covering structure of the conductive layer, and the first power transmission line is the same as the conductive layer When it is used for power transmission, it belongs to the protection scope of the present invention.
  • An embodiment of the present invention provides a transmission cable, as shown in FIG. 2, including a first power transmission line 1, a first insulating layer 2 and a conductive layer 3.
  • the first insulating layer 2 is coated on the outside of the first power transmission line 1, and the conductive layer 3 is coated on the outside of the first insulating layer 2.
  • the first insulating layer 2 is used to implement the first power transmission line 1 and the conductive layer 3. Reliable insulation.
  • the first power transmission line 1 is used as a phase line (L), and the conductive layer 3 is used as a neutral line (N); or, the first power transmission line 1 is used as a neutral line (N), and the conductive layer 3 Used as a phase line (L), that is, a single-phase power transmission can be realized through a transmission cable of a sheath structure.
  • the transmission cable adopts the first power transmission line 1 insulated from each other and the conductive layer 3 covering the outside of the first power transmission line 1 for power transmission, which can avoid human injury caused by the human body's simultaneous contact with the first power transmission lines arranged in parallel and avoid The possibility of electric shock caused by the transmission cable is avoided.
  • the first power transmission line 1 of the transmission cable is disposed coaxially with the conductive layer 3.
  • a second insulating layer 4 is further coated on the outside of the conductive layer 3, so as to achieve reliable insulation between the conductive layer 3 and the outside.
  • the conductive layer 3 may be selected from copper or other conductive materials, and it is only necessary to ensure that the conductive layer 3 can conduct electricity.
  • the conductive layer 3 is a braided mesh layer.
  • the conductive layer 3 includes a plurality of wires, and the braided mesh layer is formed by crossing the wires.
  • the conductive layer 3 is provided with a mesh layer, that is, a number of wires are coated on the outside of the first insulating layer 2 to reduce the possibility of disconnection of the conductive layer 3, thereby reducing the first innermost part of the transmission cable.
  • the possibility of exposure of the power transmission line 1 prevents a human body from contacting the wire layer 3 and the first power transmission line 1 at the same time.
  • the cross-sectional area of the wires forming the braided layer is the same as the cross-sectional area of the first power transmission line 1, which facilitates power transmission.
  • An embodiment of the present invention further provides a transmission cable for three-phase power transmission.
  • the first power transmission line 1 in the transmission cable 1 The number is three.
  • the first insulating layer 2 covers the outside of each first power transmission line 1, and the conductive layer 3 covers all the first insulating layers 2.
  • the three first power transmission lines 1 in FIG. 4 are respectively used for transmitting three-phase voltages U, V, and W, and the wire layer 3 is used for Represents the neutral line N.
  • the transmission cable in this embodiment uses the first power transmission line 1 insulated from each other and the conductive layer 3 covering the outside of the first power transmission line 1 for power transmission. Specifically, the transmission cable in this embodiment uses the outermost conductive layer 3 as a neutral wire, which avoids the use of a separate neutral wire, so that three-phase four-wire can be implemented in the same cable.
  • This transmission cable can avoid human injury caused by the human body's simultaneous contact with the first power transmission lines that are set in parallel (that is, the original transmission cables use mutually insulated phase lines and neutral lines). The safety of the electrical equipment is improved.
  • the specific number of the first power transmission line 1 on the innermost side of the transmission cable may be specifically set according to the actual situation; further, other internal parts of the transmission cable may also be set according to the actual situation
  • the functional layer only needs to ensure that the outer conductive layer 3 and the first power transmission line 1 are used for power transmission at the same time.
  • An embodiment of the present invention further provides a transmission cable. As shown in FIG. 5, different from the embodiment shown in FIG. 2, a second power transmission line 5 is further provided in the covering area of the conductive layer 3 The second power transmission line 5 is connected to the conductive layer 3, and the axial extension direction of the second power transmission line 5 is parallel to the axial extension direction of the conductive layer 3.
  • the second power transmission line 5 connected to the conductive layer 3 is further provided in the cladding area of the conductive layer 3, so as to improve the conductive performance of the conductive layer 3 to ensure that it can be applied to electrical equipment or large current transmission Power system.
  • An embodiment of the present invention further provides a transmission cable.
  • a second power transmission line 5 is further provided in the covering area of the conductive layer 3
  • the second power transmission line 5 is connected to the conductive layer 3, and the axial extension direction of the second power transmission line 5 is parallel to the axial extension direction of the conductive layer 3.
  • An embodiment of the present invention further provides an electrical device, including a transmission cable in any of the embodiments shown in FIG. 2 to FIG. 6 and an electrical device body; wherein the transmission cable is used to transmit electrical energy to the electrical device body .
  • the electrical device may be a home appliance, a power tool, or a home appliance. It can be electrical equipment in public facilities and so on.
  • the electrical equipment is an angle grinder.
  • the electrical equipment is a water heater.

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Abstract

本发明涉及电力传输技术领域,提供一种传输线缆以及电器设备,传输线缆包括至少一根第一电力传输线,第一绝缘层以及导电层;每根所述第一电力传输线的外侧包覆有第一绝缘层;所述导电层包覆在所有所述绝缘层的外侧;其中,所述导电层用于电力传输。该传输线缆采用相互绝缘的第一电力传输线以及包覆在第一电力传输线外侧的导电层进行电力传输,能够避免人体同时接触并行设置的第一电力传输线所导致的人体伤害,避免了该传输线缆所导致的触电可能性。

Description

一种传输线缆以及电器设备 技术领域
[0001] 本发明涉及电力传输技术领域, 具体涉及一种传输线缆及电器设备。
背景技术
[0002] 5见有电器设备中最主要的组成部分为电力电缆, 以实现电力传输。 其中, 电力 电缆一般由一根或多根相互绝缘的导体和外包绝缘保护层制成, 将电力从一处 传输到另一处的导线。 电缆具有内通电, 外绝缘的特征。 具体地, 如图 1所示, 现有的电力电缆其内部的导体一般采用并排设置, 例如, 相互绝缘的相线 11和 中性线 12, 以及包覆在相线 11和中性线 12外侧的绝缘层 13。
[0003] 然而, 上述技术方案中电器设备的电力电缆中, 若相线 11出现裸露点时, 人体 、 相线 11以及大地形成导电回路, 容易造成触电; 若相线 11以及中性线 12中各 出现裸露点, 当人体同时与两个裸露点接触时, 人体与两个裸露点形成导电回 路, 容易造成触电, 从而导致该传输线缆较易发生触电可能性。
发明概述
技术问题
问题的解决方案
技术解决方案
[0004] 本发明要解决的技术问题在于克服现有技术中的传输线缆的触电可能性高的缺 陷。
[0005] 鉴于此, 本发明提供一种传输线缆, 包括:
[0006] 至少一根第一电力传输线、 第一绝缘层以及导电层;
[0007] 每根所述第一电力传输线的外侧包覆有第一绝缘层;
[0008] 所述导电层包覆在所有所述第一绝缘层的外侧; 其中, 所述导电层用于电力传 输。
[0009] 可选地, 所述导电层的包覆区域内还设置有第二电力传输线, 所述第二电力传 输线与所述导电层连接且所述第二电力传输线的轴向延伸方向与所述导电层的 轴向延伸方向相同。
[0010] 可选地, 所述第一电力传输线的数量为三根, 分别用于传输三相电; 所述导电 层以及所述第二电力传输线为中性线。
[0011] 可选地, 所述第一电力传输线的数量为一根。
[0012] 可选地, 所述导电层外侧包覆有第二绝缘层。
[0013] 可选地, 所述导电层为编制网状层; 其中, 所述导电层包括若干导线, 所有所 述导线形成所述编制网状层。
[0014] 可选地, 所述导线的横截面积与所述第一电力传输线的横截面积相同。
[0015] 本发明还提供一种电器设备, 包括上述任一项所述的传输线缆, 以及电器本体 ; 所述传输线缆用于向所述电器本体传输电能。
[0016] 本发明技术方案, 具有如下优点:
[0017] 1.本发明实施例提供的电器设备传输线缆, 该传输线缆采用相互绝缘的第一电 力传输线以及包覆在第一电力传输线外侧的导电层进行电力传输, 能够避免人 体同时接触并行设置的第一电力传输线所导致的人体伤害, 避免了该传输线缆 所导致的触电可能性。
[0018] 2.本发明实施例提供的传输线缆, 通过在导电层的包覆区域内还设置与导电层 连接的第二电力传输线, 用于提高导电层的导电性能, 以保证其能够应用于大 电流传输的电器设备或电力系统中。
[0019] 3.本发明实施例提供的传输线缆, 通过在导电层外侧设置第二绝缘层, 能够提 高该传输线缆与外界的绝缘性, 避免了触电事故的发生。
[0020] 4.本发明实施例提供的传输线缆, 通过将导电层设置层编制网状层, 即在第一 绝缘层的外侧包覆若干导线, 降低了导电层断线的可能性, 从而能够减小传输 线缆最内侧的第一电力传输线暴露的可能性, 避免了人体同时接触导线层与第 一电力传输线。
[0021] 5.本发明实施例提供的传输线缆, 通过将导线的横截面积设置成与第一电力传 输线的横截面积相同, 能够较好地保证电力传输
发明的有益效果
对附图的简要说明 附图说明
[0022] 为了更清楚地说明本发明具体实施方式或现有技术中的技术方案, 下面将对具 体实施方式或现有技术描述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图是本发明的一些实施方式, 对于本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
[0023] 图 1为现有技术中传输线缆的一个具体示意的结构图;
[0024] 图 2为本发明实施例中传输线缆的一个具体示意的结构图;
[0025] 图 3为本发明实施例中传输线缆的另一个具体示意的结构图;
[0026] 图 4为本发明实施例中传输线缆的另一个具体示意的结构图;
[0027] 图 5为本发明实施例中传输线缆的另一个具体示意的结构图;
[0028] 图 6为本发明实施例中传输线缆的另一个具体示意的结构图。
[0029] 附图标记:
[0030] 图 1 : 11-相线; 12 -中性线; 13 -绝缘层;
[0031] 图 2 -图 6: 1-第一电力传输线; 2 -第一绝缘层; 3 -导电层; 4 -第二绝缘层; 5 -第 二电力传输线
发明实施例
本发明的实施方式
[0032] 下面将结合附图对本发明的技术方案进行清楚、 完整地描述, 显然, 所描述的 实施例是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施例 , 本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例 , 都属于本发明保护的范围。
[0033] 在本发明的描述中, 需要说明的是, 术语“第一”、 “第二”、 “第三”仅用于描述 目的, 而不能理解为指示或暗示相对重要性。
[0034] 此外, 下面所描述的本发明不同实施方式中所涉及的技术特征只要彼此之间未 构成冲突就可以相互结合。
[0035] 需要说明的是,本发明中的电器设备可以是电动工具,也可以是家用电器,也可以 是公共设施中的电器设备等等,只要是该电器设备中的传输线缆的结构为第一电 力传输线、 第一绝缘层以及导电层的包覆结构, 且第一电力传输线与导电层同 时用于电力传输, 都属于本发明的保护范围。
实施例
[0036] 本发明实施例提供一种传输线缆, 如图 2所示, 包括一根第一电力传输线 1、 第 一绝缘层 2以及导电层 3。 其中, 第一绝缘层 2包覆在第一电力传输线 1的外侧, 导电层 3包覆在第一绝缘层 2的外侧, 第一绝缘层 2用于实现第一电力传输线 1与 导电层 3的可靠绝缘。
[0037] 具体地, 第一电力传输线 1用作相线 (L), 导电层 3用作中性线 (N) ; 或者, 第一 电力传输线 1用作中性线 (N), 导电层 3用作相线 (L), 即通过包覆结构的一根传输 线缆即可实现单相电的传输。 该传输线缆采用相互绝缘的第一电力传输线 1以及 包覆在第一电力传输线 1外侧的导电层 3进行电力传输, 能够避免人体同时接触 并行设置的第一电力传输线所导致的人体伤害, 避免了该传输线缆所导致的触 电可能性。
[0038] 此外, 如图 2所示, 该传输线缆的第一电力传输线 1与导电层 3同轴设置。
[0039] 在本实施例的一些可选实施方式中, 如图 3所示, 在导电层 3的外侧还包覆有第 二绝缘层 4, 用于实现导电层 3与外界的可靠绝缘。 可选地, 导电层 3可以选用铜 , 或其他导电材料, 只需保证导电层 3能够导电即可。
[0040] 在本实施例的另一些可选实施方式中, 导电层 3为编制网状层, 具体地, 该导 电层 3包括若干导线, 通过导线的交叉编制形成编制网状层。 通过将导电层 3设 置层编制网状层, 即在第一绝缘层 2的外侧包覆有若干导线, 降低了导电层 3断 线的可能性, 从而能够减小传输线缆最内侧的第一电力传输线 1暴露的可能性, 避免了人体同时接触导线层 3与第一电力传输线 1。
[0041] 在本实施例的另一些可选实施方式中, 形成编制网状层的导线的横截面积与第 一电力传输线 1的横截面积相同, 便于电力的传输。 可选地, 导线的横截面积与 第一电力传输线 1的横截面积之间也可以存在预设范围内的偏差。
[0042] 本发明实施例还提供了一种传输线缆, 用于三相电的传输, 如图 4所示, 与图 2 所示实施例不同的是, 传输线缆内第一电力传输线 1的数量为三根。 其中, 第一 绝缘层 2包覆在每根第一电力传输线 1的外侧, 导电层 3包覆所有第一绝缘层 2。 图 4中的三根第一电力传输线 1分别用于传输三相电压 U、 V以及 W, 导线层 3用于 表示中性线 N。
[0043] 本实施例中的传输线缆采用相互绝缘的第一电力传输线 1以及包覆在第一电力 传输线 1外侧的导电层 3进行电力传输。 具体地, 本实施例中的传输线缆采用包 覆在最外侧的导电层 3用作中性线, 避免了单独中性线的使用, 从而能够实现在 同一根线缆中实现三相四线制的电力传输, 该传输线缆能够避免人体同时接触 并行设置的第一电力传输线(即, 原有的传输线缆采用相互绝缘且并行设置的相 线以及中性线)所导致的人体伤害, 提高了该电器设备的安全性。
[0044] 此外, 需要说明的是, 该传输线缆最内侧的第一电力传输线 1的具体设置根数 , 可以根据实际情况进行具体设置; 进一步地, 传输线缆内部也可以根据实际 情况设置其他功能层, 只需保证包覆在外侧导电层 3与第一电力传输线 1同时用 于电力传输即可。
[0045] 本发明实施例还提供了一种传输线缆, 如图 5所示, 与图 2所示实施例不同的是 , 在导电层 3的包覆区域内还设置有第二电力传输线 5 , 该第二电力传输线 5与导 电层 3连接, 且第二电力传输线 5的轴向延伸方向与导电层 3的轴向延伸方向平行
[0046] 通过在导电层 3的包覆区域内还设置与导电层 3连接的第二电力传输线 5 , 用于 提高导电层 3的导电性能, 以保证其能够应用于大电流传输的电器设备或电力系 统中。
[0047] 该传输线缆的具体结构细节请参照图 2所示实施例的描述, 在此不再赘述。
[0048] 本发明实施例还提供了一种传输线缆, 如图 6所示, 与图 4所示实施例不同的是 , 在导电层 3的包覆区域内还设置有第二电力传输线 5 , 该第二电力传输线 5与导 电层 3连接, 且第二电力传输线 5的轴向延伸方向与导电层 3的轴向延伸方向平行
[0049] 本发明实施例还提供了一种电器设备, 包括图 2至图 6任一所述实施例中的传输 线缆, 以及电器本体; 其中, 该传输线缆用于向电器本体传输电能。
[0050] 具体地, 传输线缆的结构细节, 请参照图 2至图 6所示实施例的描述, 在此不再 赘述。
[0051] 可选地, 该电器设备可以是家用电器, 可以是电动工具,也可以是家用电器,也 可以是公共设施中的电器设备等等。
[0052] 作为本发明的一种可选实施方式, 该电器设备为角磨机。
[0053] 作为本发明的另一种可选实施方式, 该电器设备为热水器。
[0054] 显然, 上述实施例仅仅是为清楚地说明所作的举例, 而并非对实施方式的限定 。 对于所属领域的普通技术人员来说, 在上述说明的基础上还可以做出其它不 同形式的变化或变动。 这里无需也无法对所有的实施方式予以穷举。 而由此所 引伸出的显而易见的变化或变动仍处于本发明创造的保护范围之中。

Claims

权利要求书
[权利要求 1] 一种传输线缆, 其特征在于, 包括:
至少一根第一电力传输线、 第一绝缘层以及导电层;
每根所述第一电力传输线的外侧包覆有第一绝缘层;
所述导电层包覆在所有所述第一绝缘层的外侧; 其中, 所述导电层用 于电力传输。
[权利要求 2] 根据权利要求 i所述的传输线缆, 其特征在于, 所述导电层的包覆区 域内还设置有第二电力传输线, 所述第二电力传输线与所述导电层连 接且所述第二电力传输线的轴向延伸方向与所述导电层的轴向延伸方 向相同。
[权利要求 3] 根据权利要求 2所述的传输线缆, 其特征在于, 所述第一电力传输线 的数量为三根, 分别用于传输三相电; 所述导电层以及所述第二电力 传输线为中性线。
[权利要求 4] 根据权利要求 1所述的传输线缆, 其特征在于, 所述第一电力传输线 的数量为一根。
[权利要求 5] 根据权利要求 1所述的传输线缆, 其特征在于, 所述导电层外侧包覆 有第二绝缘层。
[权利要求 6] 根据权利要求 1所述的传输线缆, 其特征在于, 所述导电层为编制网 状层; 其中, 所述导电层包括若干导线, 所有所述导线形成所述编制 网状层。
[权利要求 7] 根据权利要求 6所述的传输线缆, 其特征在于, 所述导线的横截面积 与所述第一电力传输线的横截面积相同。
[权利要求 8] 一种电器设备, 其特征在于, 包括权利要求 1所述的传输线缆, 以及 电器本体; 所述传输线缆用于向所述电器本体传输电能。
PCT/CN2019/097597 2018-07-27 2019-07-25 一种传输线缆以及电器设备 WO2020020262A1 (zh)

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