초록 ▼

Devices and methods for liquid fuel reverse purge on shutdown of turbines are provided. The device and method may utilize a liquid fuel reverse purge control system that includes an induction motor associated with a pump, together with fuel system solenoid valves, an electronic control unit and asso

Devices and methods for liquid fuel reverse purge on shutdown of turbines are provided. The device and method may utilize a liquid fuel reverse purge control system that includes an induction motor associated with a pump, together with fuel system solenoid valves, an electronic control unit and associated software logic. The device and method may alternative utilize a liquid fuel valve manifold including an assembly for mechanical reverse purging of liquid fuel from the atomizer fuel manifold and supply lines thereto, optionally together with an assembly for controlling the flow of the reverse-purged fuel through a re-circulation circuit used to preheat fuel prior to system start-up under cold conditions.

대표청구항 ▼

Devices and methods for liquid fuel reverse purge on shutdown of turbines are provided. The device and method may utilize a liquid fuel reverse purge control system that includes an induction motor associated with a pump, together with fuel system solenoid valves, an electronic control unit and asso

Devices and methods for liquid fuel reverse purge on shutdown of turbines are provided. The device and method may utilize a liquid fuel reverse purge control system that includes an induction motor associated with a pump, together with fuel system solenoid valves, an electronic control unit and associated software logic. The device and method may alternative utilize a liquid fuel valve manifold including an assembly for mechanical reverse purging of liquid fuel from the atomizer fuel manifold and supply lines thereto, optionally together with an assembly for controlling the flow of the reverse-purged fuel through a re-circulation circuit used to preheat fuel prior to system start-up under cold conditions. usion serving as a carrying handle formed on at least an upper part of said cleaner housing, whereby said main body including said protrusion forms an exterior shape of generally spherical or generally spherically polyhedral. 11. The electric vacuum cleaner as set forth in claim 4 wherein rotational axes of said wheels are canted upwardly with respect to the floor surface. 12. The electric vacuum cleaner as set forth in claim 4, wherein the center of gravity of said main body, rotatable about an axis of said wheels, is placed in a position rearward of and below said axis of said wheels so that a connecting port of said main body for connection of said hose to said main body tilts upwardly, when said hose is connected to said main body and said hose is disconnected from said main body. 13. The electric vacuum cleaner as set forth in claim 4, wherein: said cleaner housing contains a battery and a charge terminal, said charge terminal providing a charge to said battery; and said electric vacuum cleaner further comprises a charge stand for receiving said main body, said charge stand being provided with a charge terminal connector for charging said battery, and a guide alley on at least one end thereof for guiding the wheels of said electric vacuum cleaner onto said charge stand, thereby said charge terminal comes into connection with said charge terminal connector when said main body is moved into a position on said charge stand. 14. The electric vacuum cleaner as set forth in claim 18, wherein said charge stand includes a receiving apparatus for receiving and stabilizing any of said suction nozzle and said extension pipe. 15. The electric vacuum cleaner as set forth in claim 4, further comprising a battery housed in said main body. 16. The electric vacuum cleaner as set forth in claim 4, further comprising a power supply cord, said cleaner housing contains therein said electric blower and a cord-reel chamber for storing said power supply cord. 17. The electric vacuum cleaner as set forth in claim 4, further comprising a cord-reel stand for receiving a cord, a first end of said cord being connected to said main body. 18. The electric vacuum cleaner as set forth in claim 1, wherein said hose is provided with a connector pipe at one end for connection to said cleaner housing and an end pipe at another end for connection with said extension pipe, and at least one of said connector pipe and said end pipe is freely rotatable about a longitudinal axis thereof. 19. The electric vacuum cleaner as set forth in claim 1, further comprising a one or a plurality of batteries housed in said main body. 20. The electric vacuum cleaner as set forth in claim 19, wherein said electric blower and said battery are disposed respectively in an upper space and a lower space within said cleaner housing, and said battery is heavier than said electric blower. 21. The electric vacuum cleaner as set forth in claim 20, wherein the center of gravity of said main body is located towards either side with respect to a lateral center of said main body. 22. The electric vacuum cleaner as set forth in claim 21, wherein the center of gravity of said one or a plurality of batteries housed within said cleaner housing is located away from the lateral center of said main body, thereby the center of gravity of said main body is located towards either side with respect to said lateral center. 23. The electric vacuum cleaner as set forth in claim 1, further comprising a power supply cord, said cleaner housing contains therein said electric blower and a cord-reel chamber for storing said power supply cord. 24. The electric vacuum cleaner as set forth in claim 23 wherein said cord-reel chamber for storing said power supply cord is disposed above said electric blower, and said electric blower is heavier than said cord-reel chamber for storing said power supply cord. 25. The electric vacuum cleaner as set forth in claim 23, wherein: said cord-reel chamber for storing sa