GAS SENSOR

摘要

A protector includes an inside protector having an inside peripheral wall and a front end wall in a front end side thereof and a tubular outside protector which surrounds the inside protector. In an outside peripheral wall of the outside protector, a plurality of outside introducing ports through which an external part of the outside protector communicates with a gas separating chamber are formed at equal intervals along a circumferential direction. The outside introducing ports are formed at positions nearer to the front end side than positions where inside introducing ports of the inside protector are formed. The outside introducing ports extend in the circumferential direction of the outside peripheral wall and formed in shapes of lateral holes in which opening lengths in the circumferential direction are larger than opening lengths in the direction perpendicular to the circumferential direction.

主权项

1. A gas sensor including:
a sensing element which extends in an axial direction and has in a front end side a detecting part configured to detect a specific gas component in gas to be detected; a metal shell which surrounds and holds a periphery of the sensing element in a radial direction under a state that the detecting part is allowed to protrude from a front end part of the metal shell; an inside protector which includes an inside peripheral wall, a front end wall provided at a front end side of the inside protector, inside introducing ports formed at positions opposed to the sensing element on the inside peripheral wall to introduce the gas to the inner part of the inside protector and an opening end part provided at a base end side of the inside protector, the opening end part being fixed to the front end part of the metal shell under a state that the detecting part is accommodated so as to directly face an inner part of the inside protector; and an outside protector which includes an outside peripheral wall that surrounds the inside peripheral wall with a cavity provided between the inside peripheral wall and the outside peripheral wall and includes outside introducing ports formed on the outside peripheral wall to introduce the gas into the cavity, wherein either the plurality of inside introducing ports or the plurality of outside introducing ports are provided in a circumferential direction of at least one of the inside peripheral wall and the outside peripheral wall and are formed in shapes of lateral holes in which opening lengths in the circumferential direction are larger than opening lengths in the direction perpendicular to the circumferential direction.