초록 ▼

A pair of serially connected electrically operated computer controlled gas valves combine with a pressure sensor to output pressure regulated low pressure gas dispensed from a high pressure gas source and define a pressure regulation system of relatively simple construction, great versatility and of

A pair of serially connected electrically operated computer controlled gas valves combine with a pressure sensor to output pressure regulated low pressure gas dispensed from a high pressure gas source and define a pressure regulation system of relatively simple construction, great versatility and of heretofore unknown flexibility, well suited to remote control. The computer controlled valve controller selectively operates the valves in any and all of three operational modes, including the familiar Bang-Bang mode in which both valves operate simultaneously, a Bang-Wait mode in which both valves operate simultaneously for a precise time interval and thereafter close while the outlet gas pressure is checked, and a newly defined Burp mode. In the novel Burp mode, the valve closest to the high pressure gas source is first opened and closed to admit and capture a small volume of gas within inter-valve piping. Thereafter only the outlet valve is opened and closed to release that small volume of captured gas. Each small puff of gas captured and released during repetition of the cycle raises the outlet pressure ever so slightly until the desired pressure is sensed, thereby avoiding significant pressure overshoot.

대표청구항 ▼

[ What is claimed is:] [19.] A gas pressure regulator comprising in combination:first and second electromagnetic gas valves, each having a gas inlet and a gas outlet and each said first and second electromagnetic gas valves being operable, when energized, from a closed condition to an open condition

[ What is claimed is:] [19.] A gas pressure regulator comprising in combination:first and second electromagnetic gas valves, each having a gas inlet and a gas outlet and each said first and second electromagnetic gas valves being operable, when energized, from a closed condition to an open condition;said gas outlet of said first electromagnetic gas valve being connected to the gas inlet of said second electromagnetic gas valve to place said electromagnetic gas valves in series gas transmission relationship between said gas inlet of said first gas valve and said gas outlet of said second gas valve and to define there between a small inter-valve region for holding a limited quantity of gas when both said gas valves are in a closed condition;pressure sensor means for monitoring gas pressure at said gas outlet of said second electromagnetic gas valve and providing a sensor output representative of said outlet gas pressure; andprogrammable electrical controller means coupled to said sensor output and to said first and second gas valves for selectively controlling energization and de-energization of said first and second electromagnetic gas valves responsive to said sensor output of said pressure sensor means;said programmable electrical controller means including:Burp program means for energizing and deenergizing each of said first and second gas valves in sequence for so long as said outlet gas pressure is below a specified value, whereby each sequential energization and deenergization of said first and second gas valves admits a limited quantity of gas at said outlet for raising said outlet gas pressure;Bang-Wait program means for repeatedly energizing and deenergizing each of said first and second gas valves simultaneously for a prescribed interval for so long as said outlet gas pressure is below a specified value, whereby each energization and deenergization of said first and second gas valves admits a limited quantity of gas at said outlet for raising said outlet gas pressure; andBang-Bang program means for energizing said first and second gas valves simultaneously for so long as said outlet gas pressure is below a specified value and deenergizing said gas valves when said outlet gas pressure attains said specified valve, whereby each energization of said first and second gas valves admits a quantity of gas at said outlet for raising said outlet gas pressure;said programmable electrical controller means further including:selection means for individually selecting said specified value for each of said Burp program means, said Bang-Wait program means and said Bang-Bang program means:said selection means comprising:Burp program pressure selector means for selecting said specified value for said Burp program means;Bang-Wait pressure selector means for selecting said specified value for said Bang-Wait program means; andBang-Bang pressure selector means for selecting said specified value for said Bang-Bang program means; andwherein a specified value selected by said Bang-Bang pressure selector means comprises: P1;wherein a specified value selected by said Bang-Wait pressure selector means comprises: P2;wherein a specified value selected by said Burp program pressure selector means comprises: P3; andwherein P3 is greater than P2, which, in turn, is greater than P1.