Gas sensor

Gas sensor

  • CN 104,181,213 A
  • Filed: 05/20/2014
  • Published: 12/03/2014
  • Est. Priority Date: 05/20/2013
  • Status: Active Application
First Claim
Patent Images

1. a gas sensor, it comprises:

  • Sensor element, it extends along axis direction, and has the test section for detection of the specific gas composition in detected gas in the front of this sensor element, and this sensor element has the protective seam of the Porous that covers this test section;

    The ceramic keeper of tubular, it makes the above-mentioned protective seam of ratio of the sensor element run through by the position of rear end side, and has the peripherad slotting perforation in footpath of surrounding this sensor element;

    AndBody shell, it has endoporus, this endoporus possesses the diameter holes of the front of being located at this endoporus and is located at the hole, large footpath that is greater than the diameter of this diameter holes than this diameter holes by the position of rear end side and diameter of this endoporus, this body shell is by making the part towards front end face of above-mentioned ceramic keeper be matched with footpath that end face backwards surrounds above-mentioned ceramic keeper towards periphery, this backwards end face the inside surface of above-mentioned diameter holes is connected with the inside surface in hole, above-mentioned large footpath;

    Wherein,In above-mentioned ceramic keeper, be formed with shrinkage pool, this shrinkage pool caves in towards rear end side towards front end face from above-mentioned, and is communicated with the front end of above-mentioned slotting perforation, and the diameter of this shrinkage pool be greater than this insert perforation diameter,The rearward end of above-mentioned protective seam is contained in above-mentioned shrinkage pool to establish apertured mode between this rearward end and the inner peripheral surface of above-mentioned shrinkage pool,Above-mentioned ceramic keeper the above-mentioned inner peripheral surface of above-mentioned shrinkage pool is located to the position that relies on radially inner side than the above-mentioned inside surface of above-mentioned diameter holes with the front-end edge entirety being connected towards front end face of above-mentioned shrinkage pool.

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