POLYMERIC RESISTANCE HEATING ELEMENT
    4.
    发明公开
    POLYMERIC RESISTANCE HEATING ELEMENT 失效
    聚合物阻力

    公开(公告)号:EP0800752A1

    公开(公告)日:1997-10-15

    申请号:EP95944248.0

    申请日:1995-12-28

    IPC分类号: H05B3 H05B1

    CPC分类号: H05B3/04 H05B3/48 H05B3/82

    摘要: Polymeric heating elements (10) and water heaters containing these elements utilize heating elements (10) which include an electrically conductive resistance material (14) capable of heating fluid when energized. The elements (14) are helically wound and insulated and protected by a polymer layer (30) integrally disposed over the resistance material (14). The elements (10) are lightweight, inexpensive, and minimize galvanic corrosion and lime deposition without sacrificing heating capacity.

    IMPROVED IMMERSION HEATING ELEMENT WITH HIGHLY THERMALLY CONDUCTIVE POLYMERIC COATING
    10.
    发明公开
    IMPROVED IMMERSION HEATING ELEMENT WITH HIGHLY THERMALLY CONDUCTIVE POLYMERIC COATING 失效
    有聚合物涂层的高的热导率的改进的浸入式加热器

    公开(公告)号:EP0945046A1

    公开(公告)日:1999-09-29

    申请号:EP97953245.0

    申请日:1997-12-02

    IPC分类号: H05B3

    摘要: Electrical resistance heating elements (100) are provided which are useful in heating fluid mediums, such as air and water. The heating elements include an element body (100) having a supporting surface (10) and a resistance wire (14) wound onto the supporting surface (10) which is connected to a pair of terminal end portions (16 and 12). Disposed over the resistance wire (14), and over most of the supporting surface (10), is a polymeric coating (30) which hermetically encapsulates and electrically insulates the resistance wire (14) from the fluids to be heated. This thermally-conductive polymer coating (30) has a thermal conductivity value of at least about 0.5 W/mK. Improved properties are preferably provided by ceramic powder, aluminum oxide and magnesium oxide, and glass fiber additives.