TennRich is a national high-tech enterprise specializing in the research, development, production, and sales of high-end customized wire harnesses. It is committed to providing global customers with "safe, reliable, and intelligent" wire harness solutions and is a core wire harness supplier in the automotive, new energy, home appliance, and medical industries.
Main uses
Power transmission
Transmitting electrical energy from the main power supply to various functional modules of the appliance, such as motors (washing machines, fans), compressors (refrigerators, air conditioners), heating elements (ovens, water heaters), and control boards.
Signal and control transmission
Transmitting low-voltage command signals and data signals between control boards, sensors (temperature and humidity, position), display panels, and operating buttons to achieve intelligent control.
Internal interconnection
Connecting various independent sub-components within the appliance to form a complete, functional system.
Basic Introduction
Household appliance cables are not ordinary wires; their design must strictly meet the specific requirements of household appliances.
1. Common Types and Structures
Household appliance cables are mainly divided into two categories: internal wiring and external power cords.
• Internal Wiring: Used inside the appliance casing.
◦ Single-core wire (PVC wire): The most common type, with a copper conductor covered by a polyvinyl chloride insulation layer. It is low-cost, flexible, and used for most internal low-voltage connections.
◦ Multi-core ribbon cable (rainbow cable/ribbon cable): Multiple insulated wires of different colors are arranged in parallel, making it easy to distinguish circuits. It is often used to connect control boards to displays, buttons, etc.
◦ Silicone high-temperature wire: The insulation layer is made of silicone rubber, resistant to high and low temperatures (-60℃ ~ +200℃), and extremely flexible. It is often used in high-temperature areas such as rice cookers, ovens, and near heating elements.
◦ Shielded wire: A metal braided layer or aluminum foil layer is added outside the insulation layer to prevent signal interference. It is often used to connect precision sensors or inverters.
◦ Freon-resistant wire: Special material insulation that resists corrosion from refrigerants (such as R134a, R410a), specifically used in the compressor circuits of refrigerators and air conditioners.
• External Power Cord (Power Cable): The cable connecting the appliance to the wall socket, requiring the highest standards.
◦ Usually three-core (live wire, neutral wire, ground wire), with mandatory safety certification marks such as CCC.
◦ The plug end conforms to national standards (such as Chinese national standard, US standard, European standard, etc.), and the equipment end mostly uses standard connectors such as IEC connectors.
2. Technical Standards and Certification
This is the lifeline of household appliance cables, directly related to user safety.
• Main Standards:
◦ China: Must pass CCC (China Compulsory Certification).
◦ International: UL (USA), VDE (Germany), PSE (Japan), KC (South Korea), etc.
• Key Test Items:
◦ Electrical performance: Conductor resistance, voltage resistance, insulation resistance.
◦ Mechanical performance: Flexibility, tensile strength, bending life. ◦ Environmental Performance: Flame retardancy (crucial!), high temperature resistance, low temperature resistance, oil resistance, acid and alkali resistance.
◦ Structural Inspection: The conductor cross-sectional area (wire diameter) must meet the nominal value, and the insulation thickness must meet the standard.
3. Core Materials and Characteristics
• Conductor: Usually oxygen-free copper or tinned copper. Tin plating prevents oxidation and improves solderability and corrosion resistance.
• Insulation Layer:
◦ PVC (Polyvinyl Chloride): General purpose, flame retardant, low cost.
◦ PE (Polyethylene): Good high-frequency characteristics.
◦ XLPE (Cross-linked Polyethylene): Good heat and chemical resistance.
◦ Silicone Rubber: High and low temperature resistance, flexible.
◦ TPE/TPU (Thermoplastic Elastomer): Environmentally friendly, recyclable, good feel.
• Sheath: Some wires have an additional sheath outside the insulation layer to provide extra mechanical and environmental protection.
Specifications
Applications
• Air Conditioner: Power cord (high power, with ground wire), internal wiring (connecting compressor, fan, control board), four-way valve wiring, refrigerant-resistant leads.
• Washing Machine: Power cord, motor connection wires (must withstand frequent bending and vibration), water level sensor, door switch wiring harness.
• Microwave/Oven: Extensive use of silicone high-temperature wires to connect the magnetron, heating element, and thermostat.
• Refrigerator: Refrigerant-resistant wires connect the compressor, and ordinary PVC wires connect the lighting and thermostat.
• Rice Cooker/Electric Pressure Cooker: High-temperature wires are used for the bottom heating plate, and ordinary ribbon cables are used for the top control section.
Contact
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Email: foreigntrade@tennrich.net
WhatsApp: +86 139 132 33900
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