1. A liquid natural gas filling system comprising:
a first, low pressure vessel;
a second, high pressure vessel;
a third, high pressure vessel;
a plurality of conduits, each conduit in said plurality having a valve, extending between, and in fluid communication within said first, low pressure vessel and said at least one second, high pressure vessel;
a pressure building means coupled to said at least one second, high pressure vessel and structured to raise the pressure of a cryogenic liquid within said at least one second, high pressure vessel;
an outlet nozzle structured to be coupled to a use vessel, said outlet nozzle coupled via said plurality of conduits to, and in fluid communication with, said first, low pressure vessel, said second, high pressure vessel and said third, high pressure vessel; and
whereby a cryogenic liquid may be stored in said first, low pressure vessel at a low pressure, said cryogenic liquid at a low pressure may be further transferred to either said second, high pressure vessel or said third, high pressure vessel via said plurality of conduits, the pressure of said cryogenic liquid at a low pressure in said second, high pressure vessel or said third, high pressure vessel may be increased to a high pressure by actuating said pressure building means, and said cryogenic liquid at a high pressure in said second, high pressure vessel or said third, high pressure vessel may be transferred from said second, high pressure vessel or said third, high pressure to a use vessel via said plurality of conduits and said nozzle.
2. The liquid natural gas filling system of claim 1, wherein said pressure building means is a vaporizer.
3. The liquid natural gas filling system of claim 2, further comprising a pump assembly coupled to one conduit of said plurality of conduits and structured to accelerate the flow of fluid through said conduits.
4. The liquid natural gas filling system of claim 3, wherein said pump assembly is disposed on said nozzle conduit.
5. The liquid natural gas filling system of claim 2, wherein said plurality of conduits includes:
a first, low pressure vessel liquid outlet conduit coupled to, and in fluid communication with, said first, low pressure vessel;
a second, high pressure vessel liquid inlet conduit coupled to, and in fluid communication with, said second, high pressure vessel;
a second, high pressure vessel liquid outlet conduit coupled to, and in fluid communication with, said second, high pressure vessel;
said first, low pressure vessel liquid outlet conduit and said second, high pressure vessel liquid outlet conduit coupled, and in fluid communication, thereby forming a nozzle conduit; and
said nozzle conduit coupled to, and in fluid communication with, said nozzle;
said nozzle conduit coupled to, and in fluid communication with, said second, high pressure vessel liquid inlet conduit.
6. The liquid natural gas filling system of claim 5, wherein said plurality of conduits further includes:
a second, high pressure vessel vapor outlet conduit coupled to, and in fluid communication with, said second, high pressure vessel and said vaporizer; and
a vaporizer conduit coupled to, and in fluid communication with, said second, high pressure vessel liquid outlet conduit and said vaporizer.
7. The liquid natural gas filling system of claim 6, wherein said plurality of conduits includes:
a third, high pressure vessel liquid inlet conduit coupled to, and in fluid communication with, said third, high pressure vessel and said second, high pressure vessel liquid inlet conduit;
a third, high pressure vessel liquid outlet conduit coupled to, and in fluid communication with, said at least one second, high pressure vessel and said second, high pressure vessel liquid outlet conduit; and
said third, high pressure vessel liquid outlet conduit coupled to, and in fluid communication with, said nozzle conduit.
8. The liquid natural gas filling system of claim 1, wherein said plurality of conduits includes:
a first, low pressure vessel liquid outlet conduit coupled to, and in fluid communication with, said first, low pressure vessel;
a second, high pressure vessel liquid inlet conduit coupled to, and in fluid communication with, said second, high pressure vessel;
a second, high pressure vessel liquid outlet conduit coupled to, and in fluid communication with, said second, high pressure vessel;
said first, low pressure vessel liquid outlet conduit and said second, high pressure vessel liquid outlet conduit coupled to, and in fluid communication, thereby forming a nozzle conduit; and
said nozzle conduit coupled to, and in fluid communication with, said nozzle;
said nozzle conduit coupled to, and in fluid communication with, said second, high pressure vessel liquid inlet conduit.
9. The liquid natural gas filling system of claim 8, wherein said plurality of conduits further includes:
a second, high pressure vessel vapor inlet conduit coupled to, and in fluid communication with, said second, high pressure vessel and said vaporizer; and
a vaporizer conduit coupled to, and in fluid communication with, said second, high pressure vessel liquid outlet conduit and said vaporizer.
10. The liquid natural gas filling system of claim 9, wherein said pump assembly is disposed on said nozzle conduit.
11. The liquid natural gas filling system of claim 10, wherein said plurality of conduits includes:
a third, high pressure vessel liquid inlet conduit coupled to, and in fluid communication with, said third, high pressure vessel and said second, high pressure vessel liquid inlet conduit;
a third, high pressure vessel liquid outlet conduit coupled to, and in fluid communication with, said at least one second, high pressure vessel and said second, high pressure vessel liquid outlet conduit; and
said third, high pressure vessel liquid outlet conduit coupled to, and in fluid communication with, said nozzle conduit.
12. The liquid natural gas filling system of claim 1, further comprising an electronic control system, said electronic control system coupled to each valve on said plurality of conduits and structured to move said valves from a first, closed position to a second, open position.
13. A method of filling a vehicle fuel tank with a cryogenic liquid comprising the steps of:
providing a first, low pressure vessel containing a cryogenic liquid at a low pressure, at least one second, high pressure vessel, a plurality of conduits, each conduit in said plurality having a valve, extending between, and in fluid communication within said first, low pressure vessel and said at least one second, high pressure vessel, a pressure building means coupled to said at least one second, high pressure vessel and structured to raise the pressure of a cryogenic liquid within said at least one second, high pressure vessel, and an outlet nozzle structured to be coupled to said vehicle fuel tank, said outlet nozzle coupled via said plurality of conduits to, and in fluid communication with, said first, low pressure vessel and said second, high pressure vessel;
transferring a quantity of cryogenic liquid at a low pressure from said first, low pressure vessel to said at least one second, high pressure vessel;
raising the pressure of the cryogenic liquid in said at least one second, high pressure vessel by actuating said pressure building means;
filling said vehicle fuel tank by transferring said cryogenic liquid at a high pressure from said at least one second, high pressure vessel to said vehicle fuel tank;
providing a third, high pressure vessel coupled via said conduits to said first, low pressure assembly, said vaporizer, and said nozzle;
transferring a quantity of cryogenic liquid at a low pressure from said first, low pressure vessel to said third, high pressure vessel;
raising the pressure of the cryogenic liquid in said third, high pressure vessel by actuating said pressure building means; and
filling another vehicle fuel tank by transferring said cryogenic liquid at a high pressure from said third, high pressure vessel to said vehicle fuel tank.
14. The method of claim 13 wherein, prior to said step of filling said vehicle fuel tank, the method includes the step of:
transferring a small quantity of low pressure cryogenic fluid from said first, low pressure vessel to said vehicle fuel tank.
15. The method of claim 13 wherein, prior to said step of transferring a quantity of cryogenic liquid at a low pressure from said first, low pressure vessel to said at least one second, high pressure vessel, the method includes the step of:
venting fluid from said at least one second, high pressure vessel.
16. The method of claim 15 wherein fluid vented from said at least one second, high pressure vessel is transferred to said first, low pressure vessel.
17. The method of claim 13 wherein, said method includes the further steps of:
providing a pump assembly structured to increase the speed of fluid transfer; and
pumping said cryogenic liquid at a high pressure from said at least one second, high pressure vessel to said vehicle fuel tank.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A memory power supply circuit configured for supplying power to two types of memories slots of a motherboard, comprising:
a slot detecting terminal configured to connect with a detecting pin of the motherboard which is used to detect the memory slots;
an electrical switch element having a first terminal, a second terminal connected to ground, and a third terminal;
a first resistor;
a second resistor and a third resistor connected in series between a first power supply and ground; and
a voltage output terminal connected to power input pins of the two types of memories slots, the slot detecting terminal connected to the first terminal of the electrical switch element, a third terminal of the electrical switch element connected to the voltage output terminal via the first resistor and connected to a node between the second and third resistors.
2. The memory power supply circuit as claimed in claim 1, wherein a current-limiting resistor is connected between the slot detecting terminal and the first terminal of the electrical switch element.
3. The memory power supply circuit as claimed in claim 1, wherein the electrical switch element is a PNP transistor, the first terminal is the base of the PNP transistor, the second terminal is the collector of the PNP transistor, and the third terminal is the source of the PNP transistor.
4. The memory power supply circuit as claimed in claim 1, wherein the first power supply is 3.3V, the resistance of the first resistor is 1.75 K\u03a9, the resistance of the second resistor is 1 K\u03a9, the resistance of the third resistor is 3.7 K\u03a9.
5. A memory power supply circuit configured for supplying power to two types of memories slots of a motherboard, comprising:
a slot detecting terminal configured to connect with a detecting pin of the motherboard which is used to detect the memory slots;
an electrical switch element having a first terminal, a second terminal connected to ground, and a third terminal;
a first resistor;
a second resistor and a third resistor connected in series between a first power supply and ground;
a voltage negative feedback circuit; and
a voltage output terminal connected to power input pins of the two types of memories slots, the slot detecting terminal connected to the first terminal of the electrical switch element, a third terminal of the electrical switch element connected to a first input terminal of the voltage negative feedback circuit via the first resistor and connected to a node between the second and third resistors, a second terminal of the voltage negative feedback circuit connected to the voltage output terminal.
6. The memory power supply circuit as claimed in claim 5, wherein the voltage negative feedback circuit includes an operational amplifier (op-amp), a first field-effect transistor (FET), and a second FET, the first input terminal of the voltage negative feedback circuit is the non-inverting input terminal of the op-amp, the second input terminal of the voltage negative feedback circuit is the inverting input terminal of the op-amp, the output terminal of the op-amp is connected to the gates of the first and second FETs, the drains of the first and second FETs are connected to the first power supply, the sources of the first and second FETs are connected to the inverting input terminal of the op-amp.
7. The memory power supply circuit as claimed in claim 5, wherein a current-limiting resistor is connected between the slot detecting terminal and the first terminal of the electrical switch element.
8. The memory power supply circuit as claimed in claim 5, wherein the electrical switch element is a PNP transistor, the first terminal is the base of the PNP transistor, the second terminal is the collector of the PNP transistor, and the third terminal is the source of the PNP transistor.
9. The memory power supply circuit as claimed in claim 5, wherein the first power supply is 3.3V, the resistance of the first resistor is 1.75 K\u03a9, the resistance of the second resistor is 1 K\u03a9, the resistance of the third resistor is 3.7 K\u03a9.
10. The memory power supply circuit as claimed in claim 5, wherein the voltage output terminal is connected to ground via a porcelain capacitor and connected to ground via an electrolytic capacitor.