Improvement relating to heating blankets and the like

Improvement relating to heating blankets and the like

  • CN 1,133,355 C
  • Filed: 12/02/1998
  • Issued: 12/31/2003
  • Est. Priority Date: 12/05/1997
  • Status: Active Grant
First Claim
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1. , a kind of elongated heating element that is used for electric blanket comprises:

  • the one-level conductor along the longitudinal extension of element, is used to electric blanket that heat is provided;

    Secondary conductor, same longitudinal extension along element;

    Be positioned at the fuse layer between the firsts and seconds conductor;

    its material is selected and structural design makes it have negative temperature characteristic; and

    have an electronic control component;

    electronic control component is used to detect the resistance change of fuse layer;

    so that a kind of means to be provided;

    change the power supply output that first conductor of heat is provided to electric blanket;

    thereby the protection fuse layer is not damaged;

    heating element also comprises a fusing testing circuit;

    be used to detect the fusing of fuse layer, and be used for breaking down and the fuse layer temperature is raised to and cuts off the electricity supply automatically to the output of one-level conductor when being higher than rated temperature when control system.

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