Turnbuckle type edge leakage proof hydrogen sensor outer housing structure

Abstract

The invention discloses a turnbuckle type anti-side leakage hydrogen sensor outer shell structure which belongs to the air sensor field. The outer shell of the invention uses the turnbuckle type structure. The outer shell of the sensor and a flow combine plate are separately designed. The sandwich structure of a membrane electrode of two flow combine plates is positioned in the concave groove of the anode end of the outer shell, the cathode end of the outer shell is screwed in the concave groove of the anode end to close the shell body of the outer shell, and the flow combine plates and the membrane electrode are correspondingly clamped tightly. The structure of the sensor is screwed tightly and closed with each point stressed evenly, prevents the membrane electrode from being damaged andreduces contact resistance; furthermore the structure effectively prevents the tested air from side leaking without using two side sealing rings of the membrane electrode, simplifies the structure ofthe sensor, reduces production cost and improves the test precision. Moreover, the different materials of the outer shell and the flow combine plate can avoid a short circuit and the use of an independent flow combine plate facilitates the maintenance and replacement of components.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, in particular to a novel side leakage-proof, short-circuit-proof and easy-to-maintain housing structure for a fuel cell gas sensor. Background technique [0002] The electrochemical hydrogen sensor is a measuring device that converts the electrocatalytic reaction of the component hydrogen to be measured on the electrode into an electrical signal, so as to obtain the hydrogen content according to the strength of the electrical signal. The working principle of the device is the working principle of the fuel cell. Its internal core component is the membrane electrode (Membrane Electrode Assembly, referred to as MEA). Conductive materials such as carbon paper have evenly dispersed catalysts that initiate electrochemical reactions. Usually, the proton exchange membrane and the carbon paper sandwiched on both sides are hot-pressed to form a membrane electrode. [0003] In fuel cell sensors the an...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the housing structure of the fuel cell gas sensor is not fixed and easy to leak or has a complex structure and high cost.

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