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Anti-condensation system for refrigerator doors

  • US 4,127,765 A
  • Filed: 02/17/1978
  • Issued: 11/28/1978
  • Est. Priority Date: 02/17/1978
  • Status: Expired due to Term
First Claim
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1. For use with a refrigerator door having an electrically heated door frame including a door frame heating element and an electrically heated window including a window heating element to prevent condensation and frost from forming, apparatus for providing variable levels of heating, comprising:

  • switching means electrically connectable to the door frame electrical heating element and to the window electrical heating element for selectively altering the manner in which said door frame electrical heating element and said window electrical heating element are electrically interconnected from a series connection to a parallel connection, to alter the effective electrical resistance of the combination of said door frame and window electrical heating elements, whereby a plurality of levels of heating are selectively obtainable when the combination is connected across a voltage source of electrical current.

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