Low consumption and intelligent safe gas-supply system using gas tanks

1. A low consumption and intelligent safe gas-supply system using gas tanks, wherein said system comprises at least two gas tanks and gas tank valves installed on the at least two gas tanks, a charge valve with a check valve, at least two gas-filled parallel unit pipes, a high pressure sensor, at least two gas-supply parallel unit pipes, a gas-filled conduit, a gas-supply main conduit, a reset pressure sensor, at least two solenoid valves each with a check valve with a solenoid valve with a gas conduit passage that can be cut-off in a reverse direction, and an electronic control module (ECM); an output gas conduit passage of the charge valve with check valve is connected to one end of every gas-filled parallel unit pipe through said gas-filled conduit, the other end of every gas-filled parallel unit pipe is connected to a check valve gas conduit passage which is at one end of the one solenoid valve with check valve, one end of every gas-supply parallel unit pipe is connected to a solenoid valve gas conduit passage at said end of one solenoid valve with check valve or the other end of another check valve whose one end is connected to said solenoid valve gas conduit passage, the other end of the solenoid valve with check valve is connected to the gas tank valve through conduit, the other end of the gas-supply parallel unit pipe is connected to the gas-supply main conduit; control signals export from the ECM are input to every solenoid valve with check valve; the reset pressure sensor is installed on the gas conduit between the solenoid valve with check valve and the gas tank valve with pressure relief device, and its output is input to the ECM; the high pressure sensor is installed on the gas-supply main conduit after the gas-supply parallel unit pipe, and its output is input to the ECM, then the ECM opens the solenoid valves with check valve in sequence according to the output of the high pressure sensor, so the gas tanks supply gas in sequence until gas-supply in the last gas tank is over; at the same time, according to the output of the reset pressure sensor, the ECM automatically resets and stores the number of the gas tank which is supplying gas, so that when the system is power up, gas-supply begins from said gas tank.

2. The low consumption and intelligent safe gas-supply system using gas tanks as claimed in claim 1 , wherein: the solenoid valve of said solenoid valve with check valve can be closed in reverse direction, the check valve gas conduit passage at one end of said solenoid valve with check valve is connected to the gas-filled parallel unit pipe, and the solenoid valve gas conduit passage at said end of said solenoid valve with check valve is connected to the gas-supply parallel unit pipe, the other end of said solenoid valve with check valve is connected to the gas tank; said solenoid valve with check valve is consisted of a pilot solenoid valve with check valve and another check valve whose one end is connected to the solenoid valve gas conduit passage at one end of the pilot solenoid valve with check valve, and the other end of said another check valve which is connected to said end of said pilot solenoid valve with check valve is connected to the gas-supply parallel unit pipe, and the other end of said pilot solenoid valve is connected to the gas tank.

3. The low consumption and intelligent safe gas-supply system using gas tanks as claimed in claim 1 , wherein in that a pressure regulator is connected to the gas-supply main conduit which is set after said high pressure sensor, decompressing high-pressure gas to low-pressure gas.

4. The low consumption and intelligent safe gas-supply system using gas tanks as claimed in claim 3 , wherein a low-pressure sensor is installed on the gas-supply main conduit after said pressure regulator, and its output is connected to the ECM to monitor whether the pressure regulator works normally and execute closing for protection.

5. The low consumption and intelligent safe gas-supply system using gas tanks as claimed in claim 4 , wherein when the output pressure of said pressure regulator is beyond a design range but within +10%, the low-pressure sensor will export a signal to the ECM, and the ECM will give an alarm; when the output pressure of the said pressure regulator exceeds a design range more than +10%, the ECM will cut off all actuating coil signals of the solenoid valve with check valve and give an alarm, so that all the gas tanks are in the closed state.

6. The low consumption and intelligent safe gas-supply system using gas tanks as claimed in claim 1 , wherein gas filters are installed on both said gas-filled conduit and gas-supply main conduit, which are used to filter gas and prevent function components on the gas-filled conduit and gas-supply main conduit from breaking down.

7. The low consumption and intelligent safe gas-supply system using gas tanks as claimed in claim 1 , wherein an overflowing protection device is installed on the gas-supply main conduit, when a gas flux in the gas-supply main conduit exceeds a design value, at that time for further safe protection, an overflowing valve immediately opens, and exports a signal to the ECM, which closes the solenoid valve with check valve on the gas tank conduit which is supplying gas at the moment.

8. The low consumption and intelligent safe gas-supply system using gas tanks as claimed in claim 1 , wherein there are also solenoid valves included in said gas-supply main conduit, wherein a high-pressure solenoid valve is set before a pressure regulator and a low-pressure solenoid valve is set after the pressure regulator, whose outputs are exported to the ECM.

9. The low consumption and intelligent safe gas-supply system using gas tanks as claimed in claim 1 , wherein a temperature sensor is installed on the gas conduit which connects one end of solenoid valve of a first of said solenoid valve with check valve to the gas-supply parallel unit pipe, whose output exports to the ECM, wherein said ECM modifies the left gas volume in the gas tank according to the gas temperature of the gas tanks and conduit which is detected by the temperature sensor, which makes the system measure a left gas volume more accurately.

10. The low consumption and intelligent safe gas-supply system using gas tanks as claimed in claim 1 , wherein said electronic control module (ECM) includes a microprocessor circuit, a actuating coil driving circuit and a voltage-stabilizing circuit; when power-on, according to the memory, the microprocessor circuit judges which gas tank is currently used from the at least two gas tanks and transmit a signal to the actuating coil driving circuit of the solenoid valve with check valve on this conduit, so as to open the solenoid valve and the corresponding gas tank start to supply gas; during the gas-supply process, the microprocessor circuit will receive the signal detected by the high-pressure sensor, close the gas-supply tank according to logic judgment, open the next gas tank, and store the new gas tank number; when all the gas tanks are filled, the microprocessor circuit will reset the gas tank number, and store the gas tank number after restoration; the voltage-stabilizing circuit provides stable and reliable power supply for every circuit of the ECM.

11. The low consumption and intelligent safe gas-supply system using gas tanks as claimed in claim 10 , wherein said microprocessor also has self-detection function, and can open the gas tanks one by one and check signals detected by the pressure sensors, if the set requirement is not met, give an alarm.

12. The low consumption and intelligent safe gas-supply system using gas tanks as claimed in claim 10 , wherein said microprocessor also has a function of controller area network (CAN) communication and a function of modifying a gas volume display; through a CAN transceiver, the microprocessor circuit can send an out alarm signal, a gas tank closed signal and the current total volume of the left gas to other circuits which have CAN communication function outside this system, and receive command of opening all the gas tanks, command of closing all the gas tanks and self-detection command from other CAN circuits.