Detector for infrared gas analyzer

The infrared gas analyzer detector uses welding and low-melting-point glass to join components, addressing the issues of prolonged maintenance and sensitivity degradation caused by epoxy resin adhesives, enhancing workability and sensitivity.

JP7865444B1Active Publication Date: 2026-05-26FUJI ELECTRIC CO LTD
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Patent Information

Application Number
JP2025189041
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2025-11-10
Publication Date
2026-05-26
Estimated Expiration
2045-03-21

AI Technical Summary

Technical Problem

The use of epoxy resin-based adhesives in infrared gas analyzers leads to prolonged high-temperature maintenance times, degassing, and sensitivity degradation due to gas adsorption, affecting workability and sensitivity over time.

Method used

The infrared gas analyzer detector employs a welding method using light energy to join infrared transmission windows with frames and a metal layer, and uses low-melting-point glass or solder as joining members to eliminate the need for organic adhesives, ensuring airtight seals and maintaining sensitivity.

Benefits of technology

This approach improves manufacturing workability and maintains sensitivity over a long period by reducing high-temperature maintenance times and preventing gas adsorption, while allowing for efficient mass production.

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Abstract

To improve work efficiency during manufacturing and maintain good sensitivity over the long term. [Solution] The infrared gas analyzer detector (20) comprises first to third infrared transmitting windows (21 to 23) that transmit infrared rays, a front gas chamber forming body (27) to which the infrared transmitting windows are joined to form first and second gas chambers (31, 32), and a sensor unit (60) housed in a containment space (62) communicating with each gas chamber to detect the concentration of the gas to be measured. The gas chamber forming body comprises a frame (81 to 83) to which the first to third infrared transmitting windows are joined, and a main body (34) that forms each gas chamber and to which the first to third frame (34) is joined. The infrared transmitting windows and the frame are joined at room temperature via metal layers (86, 88) formed in the joining regions of each.
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