| 摘要 |
PURPOSE:To detect automatically the life of a removing reagent of gaseous hydrogen generated especially from a closed circulation type absorption refrigerator with high accuracy, by forming a metallic oxide thin film on the inner surface of a ceramic tube as the removing reagent of gaseous hydrogen and detecting the variation of electric conductivity of this film. CONSTITUTION:A detector 5 for gaseous hydrogen removing reagent is obtained e.g. by forming a Cu thin film and heating said film at 500 deg.C in the atmosphere to form a CuO thin film 2 of 100-1,000Angstrom thickness on the inner surface of a ceramic tube 1 in the neighborhood of a gas exit 4 of a gaseous hydrogen removing reactor 3 in a hydrogen removing apparatus of a closed circulation type absorption refrigerator carrying out concentration of an aqueous LiBr solution, dilution of a cooling medium and heat exchange. This detector 5 is used by fixing with a packing 8 made of stainless steel on the exit 4 of the hydrogen removing apparatus. When the CuO in the reactor 3 loses the H2 removing capacity, the film 2 of the detector 5 becomes CuO Cu2O Cu and the face that the electric conductivity is varied is detected. The detection is carried out during unmanned operation of the refrigerator and safety operation is carried out by changing over the reactor 3 to a preliminary device 13 because 0.1ppm H2 concentration can be detected. |
