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Capacitive sensor system

  • US 8,049,518 B2
  • Filed: 09/13/2005
  • Issued: 11/01/2011
  • Est. Priority Date: 09/17/2004
  • Status: Active Grant
First Claim
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1. Capacitive sensor system provided for a door (21) of a refrigeration appliance, the capacitive sensor system being arranged for detecting properties of a capacitance (42) between an antenna device and an earth plane (23), wherein the antenna device comprises a first (26) and a second portion (39) which are movable in relation to each other, the second portion (39) being connected to and electrically parallel with the first portion (26), and the two portions being arranged in parallel in relation to said capacitance (42) for capacitive influence from a small portion of a human body, wherein the first portion (26) being an electrical conductive door part of said door (21), the electrical conductive door part being a liner forming said door, and the second portion (39) being an electrical conductive device arranged at a rest position for the door (21), wherein said door is arranged to close at least one compartment opening of the appliance.

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