Pressure responsive control circuit for an electrolysis-type hydrogen generator.

摘要

1,165,512. Electrolytically producing hydrogen. NATIONAL DISTILLERS & CHEMICAL CORP. May 10, 1968 [May 10, 1967], No. 22363/68. Heading C7B. [Also in Division G3] A gauge responsive to the pressure of hydrogen produced by an electrolysis generator has a photoelectric pick-off and associated transistor relay circuit which controls the electric supply to the generator to maintain the pressure constant. As shown, direct voltage derived through rectifiers 58 from a transformer 40 is applied between anode 14 and cathode 16 of an electrolysis cell 12 which, when supplied with water at 22, produces oxygen at the anode which is taken off at 26, and hydrogen at the cathode, which is collected by a funnel 20 and taken off at 28. Variations of hydrogen pressure with demand, e.g. by flame detection apparatus (not shown) for atmosphere contamination, are detected by a manometer 30 the liquid in which influences the amount of light transmitted from a lamp 34 to a photo-cell 36. The arrangement is such that when hydrogen pressure falls below a value determined by the positioning of the lamp-cell combination along manometer 30, a transistor operated relay 98 is actuated to short circuit a resistor 48 and increase the supply to transformer 40 so that the rate of hydrogen generation is increased. Addition of differential and integral components of control is referred to. Operation of a switch 52 permits manual control of the rate of hydrogen generation by adjustment of an auto-transformer 78. A relay 60 associated with an auxiliary cathode 18 detects fall of water level below this cathode and operates a warning lamp, 70. An air pump 74 is provided to draw samples of air into the flame detection apparatus.