JPH08100895A - Gas supply device - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a gas supply device configured to fill more gas into a tank to be filled in a short time. A gas supply device 1 includes a pressure generation unit 4 for increasing city gas to a predetermined pressure, a dispenser unit 5 for supplying gas compressed by the pressure generation unit 4 to a fuel tank 3, and these pressure generation units. 4, and a control device 6 for controlling each device of the dispenser unit 5. Variable gas accumulator 13 or high pressure gas accumulator 14
The gas supplied from is cooled by the cooler 40 and filled in the fuel tank 3. The cooler 40 cools the gas flowing through the gas supply pipeline 19 by utilizing the cooling action that occurs when the gas branched from the gas supply pipeline 19 undergoes adiabatic expansion. Then, the gas used for cooling is collected in the snubber tank 50 and reused.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas supply device, and more particularly to a gas supply device configured to fill a tank to be filled with compressed gas.

[0002]

2. Description of the Related Art For example, as a gas supply device for supplying compressed natural gas (CNG) obtained by compressing natural gas to another tank, there is a device as disclosed in Japanese Utility Model Laid-Open No. 4-64699. The device of the publication uses a method of rapidly filling compressed gas, and temporarily stores in a gas supply tank a gas whose pressure has been raised to a predetermined pressure or higher (for example, 250 kgf / cm ² ) by a compressor, and The gas stored in the gas supply tank is supplied to the fuel tank (filled tank) of the automobile so that the inside of the fuel tank has a predetermined pressure (for example, 200 kgf / c).
It is designed to be filled until it reaches m ² ).

The amount of gas supplied to a fuel tank of an automobile is measured by a flow meter arranged in a gas supply line,
The filling pressure of the fuel tank can be detected by a pressure transmitter that outputs a signal corresponding to the pressure. Therefore, the mass actually filled can be calculated from the pressure and density filled in the fuel tank.

[0004]

In the above gas supply device, the gas compressed to a high pressure of, for example, 250 kgf / cm ² is filled in the fuel tank, so that the temperature of the compressed gas is considerably high. The tank is filled with hot gas. However, the temperature of the fuel tank gradually decreases to room temperature when time elapses after the gas filling of the fuel tank is completed.

Then, since the gas in the fuel tank contracts as the temperature decreases, the pressure in the fuel tank decreases as the temperature of the fuel tank decreases. Therefore, since the temperature of the gas is high at the time of gas filling, the amount of gas filled in the fuel tank is reduced accordingly. For example, when the gas is rapidly filled in a short time, the temperature of the gas becomes higher than usual and the actual amount (Mass) will decrease. Further, when the gas is filled while gradually increasing the pressure, more gas can be filled, but the filling time becomes long and the waiting time for the customer is actually too long, which is difficult to realize.

Therefore, an object of the present invention is to provide a gas supply device which solves the above problems.

[0007]

SUMMARY OF THE INVENTION The present invention provides a gas supply tank for storing compressed gas, and a gas supply line having one end connected to the gas supply tank and the other end connected to a filled tank. A cooler provided in the gas supply pipeline for cooling the gas supplied from the gas supply tank; a gas supply on-off valve disposed in the gas supply pipeline; and the gas supply tank connected to the tank to be filled. Pressure detection means for detecting the pressure of the gas supply pipeline, a flow meter for measuring the amount of gas filled in the tank to be filled via the gas supply pipeline, and the gas supply opening / closing valve are opened. Control means for filling the gas cooled by the cooler into the filling tank and closing the gas supply opening / closing valve when the pressure of the filling tank reaches a target pressure. .

[0008]

According to the present invention, by opening the gas supply on-off valve and filling the gas cooled by the cooler into the filling tank, it is possible to fill more gas into the filling tank in a short time. It will be possible.

[0009]

1 and 2 show an embodiment of the gas supply device according to the present invention.

In FIG. 1, the gas supply device 1 is installed, for example, in a gas supply station for supplying compressed natural gas (CNG) obtained by compressing city gas to a predetermined pressure to a fuel tank (filled tank) 3 of an automobile 2. ing. The compressed natural gas is an example, and the gas handled by the gas supply device 1 is not limited to this, and includes other gases that are compressed and used in a high pressure range from atmospheric pressure to about 200 atm.

The gas supply device 1 generally comprises a pressure generating unit 4 for increasing the city gas to a predetermined pressure, a dispenser unit 5 for supplying the gas compressed by the pressure generating unit 4 to the fuel tank 3, and these pressures. The control unit 6 controls each device of the generation unit 4 and the dispenser unit 5.

The pressure generating unit 4 temporarily supplies the gas from a medium pressure pipeline (not shown), to which city gas is fed at a medium pressure (pressure higher than the pressure used at home), to a snubber tank 50 described later. The gas from the upstream pipe 7 connected to the snubber tank 50 is stored and compressed by the multistage compressor 8. This compressor 8 has, for example, a plurality of cylinders (3 or 4) for compressing gas.
It is provided so that the gas compressed by the cylinder of the previous stage is pressurized to a higher pressure by the cylinder of the next stage.
The gas supplied from the medium pressure line is compressed stepwise.

Further, the compressor 8 has a variable pressure line 9
And the high-pressure pipeline 10 are connected in parallel, and check valves 11 and 12 that prevent compressed gas from flowing back to the compressor 8 are arranged in the pipelines 9 and 10, respectively. The variable pressure pipe 9 and the high pressure pipe 10 are respectively provided with a variable pressure gas accumulator 13,
It is connected to the high pressure gas pressure accumulator 14. The variable pressure gas accumulator 13 and the high pressure gas accumulator 14 are generally referred to as gas accumulators in the literature.

In this embodiment, when the maximum pressure of the fuel tank 3 is 200 kgf / cm ² , the maximum pressure of the variable pressure gas accumulator 13 and the high pressure gas accumulator 14 is 250 kgf / cm ^2.
Set to cm ² . Therefore, the compressor 8 compresses the city gas (about 5 to 8 kgf / cm ² ) supplied from the medium pressure line to bring the pressures of the variable pressure gas accumulator 13 and the high pressure gas accumulator 14 to the above set pressure.

Further, a discharge pipe line 15 for discharging the gas from the variable pressure gas pressure accumulator 13 and the high pressure gas pressure accumulator 14,
On-off valves 17, 18 made of solenoid valves are arranged at 16. In addition, in FIG. 3 and later, the on-off valves 17 and 18 are set to V _{PA1,
Represented} as V _PA2 .

The discharge pipes 15 and 16 communicate with the gas supply pipe 19, and the variable pressure gas accumulator 13 and the high pressure gas accumulator 14 are connected to the fuel tank 3 via the gas supply pipe 19. To be done.

Further, the gas supply conduit 19 is provided with a cooler 4 for cooling the gas flowing through the gas supply conduit 19 in order from the upstream side.
0, a gas supply opening / closing valve 20 including an electromagnetic valve, a variable pressure gas pressure accumulator 13, and a primary pressure transmitter (pressure detecting means) 21 for detecting the pressure of the supply gas supplied from the high pressure gas pressure accumulator 14.
A mass flow meter 22 for measuring the amount of gas supplied to the fuel tank 3, a pressure control valve 23 for adjusting the gas pressure supplied to the fuel tank 3 to a predetermined pressure, and a supply supplied to the fuel tank 3. A secondary pressure transmitter (pressure detecting means) 24 for measuring gas pressure and a manual three-way valve 25 are provided.

As shown in FIG. 2, the cooler 40 has a box-shaped heat insulating chamber 41 made of a heat insulating material and a metal housing 42 housed inside the heat insulating chamber 41. The inside of the housing 42 is a cooling chamber 42a, and a cooling pipe (cooling conduit) 43 wound in a coil shape is provided in the cooling chamber 42a in order to enhance the cooling effect.

Both ends of the cooling pipe 43 are connected to and connected to the gas supply pipe line 19, respectively. Therefore, as will be described later, the gas supplied from the variable pressure gas pressure accumulator 13 or the high pressure gas pressure accumulator 14 at the time of gas filling passes through the cooling pipe 43 and is supplied downstream.

The gas supply line 19 upstream of the cooler 40 is also provided.
A cooling gas supply pipeline 44 for supplying the cooling gas to the cooling chamber 42a is branched into the cooling gas supply pipeline 44, and the cooling gas supply opening / closing valve (V _C ) 4 including an electromagnetic valve is provided in the cooling gas supply pipeline 44.
5 are provided. Further, a throttle 46 that reduces the amount of gas supplied to the cooling chamber 42a is provided at the end of the cooling gas supply pipe 44 that communicates with the cooling chamber 42a.

Therefore, when the cooling gas supply opening / closing valve 45 is opened by a command from the control device 6, the compressed gas is supplied to the cooling chamber 42a via the cooling gas supply pipe line 44, and at this time, it is cooled by the throttle 46. Since the amount of gas supplied to the chamber 42a is reduced, the pressure in the cooling chamber 42a is considerably lower than the pressure in the gas supply pipeline 19.

Therefore, the throttle 46 of the cooling gas supply line 44 is
The gas that has passed through and is ejected into the cooling chamber 42a having a low pressure undergoes adiabatic expansion. That is, adiabatic expansion is a change in which energy does not enter and leave the system. In adiabatic expansion of gas, the gas performs work due to an increase (expansion) in volume, so the temperature of the gas decreases.

As described above, the gas jetted into the cooling chamber 42a undergoes adiabatic expansion to lower the temperature and deprive the surface temperature of the cooling pipe 43. The gas flowing in the cooling pipe 43 cooled by the adiabatic expansion of the gas is supplied to the gas supply opening / closing valve 20 in a state in which the gas is cooled and the temperature thereof is lowered.

Therefore, the cooler 40 has the gas supply pipeline 1 in the process of adiabatically expanding the gas supplied from the variable pressure gas pressure accumulator 13 or the high pressure gas pressure accumulator 14 as a gas supply tank.
The cooling pipe 43, which serves as a cooling pipe communicating with 9, is cooled. Therefore, the cooler 40 does not need a power source and the cooler 40 does not need to have an explosion-proof structure.

Further, the gas that has cooled the cooling pipe 43 of the cooler 40 is the variable pressure gas accumulator 13 or the high pressure gas accumulator 1
Reflux to 4. Therefore, the gas used for cooling can be reused without being wasted.

Therefore, since the gas filled in the fuel tank 3 is supplied as the low temperature gas cooled by the cooler 40 having the above-mentioned structure, the temperature increase in the fuel tank 3 during the gas filling can be suppressed. Therefore, even if the maximum filling pressure is the same as in the conventional case, the fuel tank 3 can be filled with a larger amount of gas than in the conventional case due to the temperature decrease of the gas. Moreover, since the supplied gas is cooled, the temperature rise of the fuel tank 3 is moderated even if it is rapidly filled, and the gas is filled in a shorter time than before until the pressure in the fuel tank 3 reaches the target pressure. You can

Further, the cooling gas supplied to the cooling chamber 42a flows out to the cooling gas recovery pipeline 47 which is located on the opposite side of the cooling gas supply pipeline 44 and communicates with the downstream side. The cooling gas recovery pipe line 47 communicates with a recovery pipe line 48 described later. A check valve 49 is provided downstream of the recovery pipe 48.
The cooling gas discharged from the cooling chamber 42a is connected to the snubber tank 50 of the compressor 8 via the cooling gas recovery pipe line 47 and the recovery pipe line 48 and is collected in the snubber tank 50.

Therefore, the gas used for cooling is supplied from the snubber tank 50 to the compressor 8 again, and is reused and is not wasted.

Further, the gas supply line 1 downstream of the cooler 40
A tubular heat insulating material 51 is wound around the outer peripheries of 9, 26. Therefore, the gas cooled by the cooler 40 is prevented from being heated by the heat from the outside while flowing through the gas supply pipe line 19 by the heat insulating material 51, and the fuel cooled at the low temperature is kept at the low temperature. The tank 3 is filled.

Returning to FIG. 1, the structure of the gas supply device 1 will be described.

In FIG. 1, a three-way valve 25 has ports a, b and c, a gas filling hose 26 connected to the gas supply line 19 is connected to the port a, and a connection coupler 28 is connected to the port b. Are connected. Further, a low pressure pipe 27 communicating with the low pressure side (opened to the atmosphere in this embodiment) is connected to the c port.

The mass flowmeter 22 is a vibrating mass flowmeter that vibrates a sensor tube through which gas passes and outputs a measurement signal corresponding to the phase difference between the inflow side and the outflow side due to the Coriolis force to the control device 6. The pressure resistance structure allows accurate measurement of the flow rate of relatively high pressure gas.

A connecting coupler 30 as a connecting portion to which the connecting coupler 28 is connected, and a manual on-off valve 31 for opening or closing the conduit 29 are connected to the conduit 29 drawn from the fuel tank 3. A check valve 32 for preventing the gas filled in the fuel tank 3 from flowing out is provided.

The connecting couplers 28 and 30 each have a built-in check valve therein. When the couplers 28 and 30 are connected, the check valves are switched to the open state, and the couplers 28 and 3 are connected.
In the state where 0 is separated, the check valve is closed to prevent outflow of gas.

The three-way valve 25 connects the port a and the port b in the gas filling mode by the operator's switching operation, and connects the port b and the port c in the gas outflow mode after the completion of the gas filling. To switch to.

The three-way valve 25 is switched after the gas filling is completed, and the residual gas pressure in the connecting couplers 28, 30 is released to the low pressure pipe line 27 to reduce the pressure in the connecting couplers 28, 30 to the atmospheric pressure. As a result, the pressure in the connecting couplers 28 and 30 is reduced to the extent that the connection releasing operation can be performed, so that the connection between the connecting coupler 28 and the connecting coupler 30 can be easily released.

The above-mentioned recovery conduit 48 is connected to the gas supply conduit 19 between the secondary pressure transmitter 24 and the three-way valve 25. A recovery valve 52, which is an electromagnetic valve, is provided in the recovery conduit 48 near the gas supply conduit 19.

When the recovery valve 52 is opened by a command from the control device 6, the residual gas pressure in the connecting couplers 28, 30 is recovered in the snubber tank 50 via the recovering conduit 48, and the recovering valve 52 is in the connecting couplers 28, 30. Is reduced to atmospheric pressure.

Therefore, in the gas supply device 1, the recovery valve (V
The residual gas pressure in the gas filling hose 26 and the connecting couplers 28, 30 can be automatically recovered in the snubber tank 50 by opening / closing the _k ) 52, and the connecting coupler 28, 30 can also be operated by switching the three-way valve 25. The residual gas pressure in 30 can be discharged to the low-pressure line 27.

Therefore, the recovery valve 52 is normally used,
When the recovery valve 52 fails, the three-way valve 25 can be manually switched.

The control device 6 is connected to each of the above devices, and is also connected to a start button 33, a display 34, an alarm device 35, a filling display lamp 36, and a gas discharge lamp 37. Further, in the memory 38 of the control device 6, as will be described later, it is confirmed that the manual opening / closing valve 31 of the fuel tank 3 is closed after the completion of the gas filling, and the inside of the connecting couplers 28, 30 is confirmed. And a degassing work program for releasing the residual gas of are stored.

Since the mass flow meter 22 is located upstream of the pressure control valve 23, the pressure supplied to the mass flow meter 22 is
The supply pressure from the variable pressure gas accumulator 13 and the high pressure gas accumulator 14 is always constant and does not change. Therefore, since the pressure supplied to the mass flowmeter 22 does not change rapidly, the temperature change is almost equal to the temperature change of the surrounding atmosphere. Therefore,
The mass flowmeter 22 can perform accurate flow rate measurement without being affected by sudden pressure fluctuations and temperature changes, and can maintain stable measurement accuracy.

Next, the process performed by the control device 6 will be described together with the gas filling work in the gas supply device 1 having the above-mentioned configuration.

3 to 4 are main flow charts executed during the gas filling work.

The worker attaches the connecting coupler 28 provided at the tip of the gas supply line 19 to the connecting coupler 30 of the fuel tank 3.
After that, the manual on-off valve 31 is opened.
The three-way valve 25 is normally set in a state where the a port and the b port are in communication with each other. Then, the operator confirms the connection work and the valve operation, and turns on the start button 33.

In FIG. 3, the control device 6 reads the pressure value from the secondary pressure transmitter 24 in step S1 (hereinafter “step” is omitted), and the connecting coupler 28 makes the connecting coupler 30.
Make sure you are connected to. That is, the connection coupler 2
When 8 and 30 are normally connected and the manual on-off valve 31 is open, the residual pressure of the fuel tank 6 is detected. If the connection couplers 28 and 30 are not properly connected, air is introduced from the connection coupler 28, so that atmospheric pressure is detected. In that case, the alarm device 35 is used.
A further alarm is issued and a message such as "coupler connection failure" is displayed on the display unit 28 to stop the apparatus.

Next, all solenoid valves, that is, the on-off valves 17, 1
8, it is confirmed that the gas supply on-off valve 20, the pressure control valve 23, the cooling gas supply on-off valve 45, and the recovery valve 52 are closed (S2), and the on-off valve 17 is opened (S).
3). As a result, the gas accumulated in the variable pressure gas accumulator 13 is supplied to the gas supply pipeline 19 via the pipeline 15.

In S4, the supply pressure P _in detected by the primary pressure transmitter 21 and the filling pressure P _out of the fuel tank 3 detected by the secondary pressure transmitter 24 (where the filling pressure P _out is the fuel tank 3). (Which is considered to be equivalent to the pressure of), (P _in −
It is checked whether P _out ) is greater than or equal to a preset specified value.

That is, when P _in -P _out is equal to or greater than the preset specified value, it is determined that the fuel tank 3 has a low pressure and can be filled.

Therefore, in S4, P _in -P _out
If is equal to or greater than the preset specified value, the process proceeds to S5, and the filling display lamp 36 is turned on to inform the operator that filling is possible. Then, the gas supply on-off valve 19 and the cooling gas supply on-off valve 45 are opened (S6), and the pressure control valve 23 is opened (S7).

With this, filling of the fuel tank 3 with gas is started. Then, when the cooling gas supply opening / closing valve 45 is opened, the compressed gas is supplied to the cooling chamber 42a via the cooling gas supply pipeline 44, and adiabatically expands. In this way, the gas ejected into the cooling chamber 42a undergoes adiabatic expansion to lower the temperature and deprive the surface temperature of the cooling pipe 43.

Since the gas filled in the fuel tank 3 is supplied as the low temperature gas cooled by the cooler 40, the temperature rise in the fuel tank 3 during gas filling can be suppressed. Therefore, the fuel tank 3 can be filled with a larger amount of gas than the conventional one due to the temperature decrease of the gas, the temperature rise of the fuel tank 3 is relieved even if the fuel is rapidly filled, and the gas is filled in a short time. be able to.

When P _in- P _out is less than the preset specified value _in S4, S5 to S10
The process is omitted and the process proceeds to S11 described later.

In the next step S8, the valve opening of the pressure control valve 23 is controlled to perform constant pressure increase control. Then, in S9, the filling pressure P _out detected by the secondary pressure transmitter 24 is 2
Check if it has reached 00 kgf / cm ² . if,
When the filling pressure P _out is 200 kgf / cm ² or less, the process proceeds to S10, and it is checked whether the differential pressure P _in- P _out is equal to or more than a preset specified value.

In S9, the secondary pressure transmitter 2
When the filling pressure P _out detected at 0 reaches 200 kgf / cm ² , the gas filling is completed, and the process proceeds to S11 to close the gas supply opening / closing valve 16 and the cooling gas supply opening / closing valve 45. Further, after closing the pressure control valve 19 in S12, S13
The on-off valve 13 on the variable pressure side is closed with. After that, the processing shifts to S24, which will be described later, and the processing from S24 onward is executed.

In S10, when P _in −P _out ≧ specified value, the process returns to S8 and the processes of S8 to S10 are repeated. However, in S10, when P _in −P _out <specified value, the process proceeds to S14, the on-off valve 17 is closed, and S
At 15, the open / close valve 18 on the high pressure side is opened. This allows
The high-pressure gas accumulated in the high-pressure gas accumulator 14 is supplied to the gas supply pipeline 19 via the pipeline 16.

In S16 shown in FIG. 4, the primary pressure transmitter 2
1 between the supply pressure P _in detected by the secondary pressure transmitter 24 and the filling pressure P _out of the fuel tank 3 detected by the secondary pressure transmitter 24 (P
_in -P _out) to check whether a pre-set specified value or more. That is, as in the case of S4 described above, when P _in -P _out is equal to or greater than the preset specified value, it is determined that the fuel tank 3 has a low pressure and can be filled.

Therefore, in S16, P _in -P
_{If out} is equal to or greater than the preset specified value, S1
7, the valve opening of the pressure control valve 23 is controlled to perform constant pressure increase control. Further, in S16, P _in -P _out
<If it is a specified value, the gas supply pressure from the high pressure gas pressure accumulator 14 is close to the filling pressure P _out of the fuel tank 3 that has been completely filled by the variable pressure gas pressure accumulator 13, so it is determined that filling is not possible. Then, the process proceeds to S21 described later.

Then, in S18, it is checked whether the differential pressure between P _{in and} P _out is equal to or more than a preset specified value. If P _in −P _out ≧ specified value,
In S19, it is checked whether the filling pressure P _out detected by the secondary pressure transmitter 24 has reached 200 kgf / cm ² .

At S19, the filling pressure P _out is 200 kg.
If it is less than f / cm ^2, the process returns to S17 and the processes of S17 to S19 are repeated. However, in S19, the filling pressure P _out
When ≧ 200 kgf / cm ² , it is judged that the pressure in the fuel tank 3 has reached the target of 200 kgf / cm ² , and S20
Proceed to the gas supply on-off valve 20 and the cooling gas supply on-off valve 4
5 is closed.

In S18, P _in -P _out <
In the case of the specified value, the gas supply pressure from the high pressure gas pressure accumulator 14 is a value close to the filling pressure P _out of the fuel tank 3 that has been completely filled by the variable pressure gas pressure accumulator 13, so that When it is determined that the pressure has dropped significantly, the process proceeds to S21, an alarm is issued from the alarm device 35, and a message such as "There is an abnormality in the high pressure gas accumulator" is displayed on the display 34.

Further, after closing the pressure control valve 23 in S22, the opening / closing valve 18 on the high pressure side is closed in S23. Then, the filling display lamp 36 is turned off to notify the operator that the filling of the fuel tank 3 with the gas is completed (S2).
4).

After the filling of the fuel tank 3 with the gas is completed and the filling display lamp 36 is turned off, the control device 6 proceeds to S25 shown in FIG. 5 to open the recovery valve 52.

As a result, the gas remaining in the gas supply line 19, the gas filling hose 26 and the line 29 between the gas supply on-off valve 20 and the manual on-off valve 31 passes through the recovery line 48 and the snubber tank 50. Will be collected.

When the gas remaining downstream of the gas supply on-off valve 20 flows into the recovery conduit 48 and the pressure P _out detected by the secondary pressure transmitter 24 decreases (S26), the gas discharge lamp 37 is turned on. (S27).

When the pressure P _out detected by the secondary pressure transmitter 24 is reduced to almost atmospheric pressure (S2
8) Then, it is determined that the gas emission is completed, and the gas emission lamp 37 is turned off (S29). With this connection coupler 2
The pressure in 8, 30 is reduced to atmospheric pressure.

After that, the process proceeds to S30, and the recovery valve 52 is closed. This completes a series of gas filling processes.

In the above embodiment, the case where compressed natural gas (CNG) obtained by compressing city gas is supplied has been described as an example, but the present invention is not limited to this, and gas such as butane and propane may be supplied. Of course, it can be applied.

In the above embodiment, the gas diverted from the gas supply pipeline 19 is supplied to the cooler 40, and the gas flowing through the gas supply pipeline 19 is cooled by utilizing the adiabatic expansion of the gas. Of course, a cooler having a structure driven by a power source such as a cooler may be provided in the middle of the gas supply pipeline 19.

In the above embodiment, the case where the fuel tank 3 of the automobile 2 is filled with the compressed gas has been described as an example, but the present invention is not limited to this, and a device for supplying the compressed gas to another container or the like. Needless to say, the present invention can also be applied to a device configured to be installed in the middle of a pipeline for simply feeding compressed gas to another place.

In the above embodiment, the city gas is compressed from the medium pressure pipeline before the city gas is branched to the household. However, the present invention is not limited to this. You may make it take out gas from the pipeline of.

[0072]

As described above, according to the present invention, the gas cooled by the cooler is filled in the tank to be filled by opening the gas supply on-off valve, so that the temperature of the gas in the tank to be filled is reduced. It is possible to fill a larger amount of gas than before, and the temperature rise of the tank to be filled is alleviated even with rapid filling, and a large amount of gas can be filled in a short time.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of a gas supply device according to the present invention.

FIG. 2 is a vertical cross-sectional view showing an enlarged configuration of a cooler.

FIG. 3 is a flowchart for explaining a process executed by a control device during a gas filling operation.

FIG. 4 is a flowchart of a process executed subsequent to the process of FIG.

5 is a flowchart of a process executed subsequent to the process of FIG.

[Explanation of symbols]

 1 Gas Supply Device 3 Fuel Tank 4 Pressure Generation Unit 5 Dispenser Unit 6 Control Device 13 Variable Pressure Gas Accumulator 14 High Pressure Gas Accumulator 17, 18 Open / Close Valve 19 Gas Supply Pipeline 20 Gas Supply Open / Close Valve 21 Primary Pressure Transmitter 22 Mass flowmeter 23 Pressure control valve 24 Secondary pressure transmitter 25 Three-way valve 28,30 Connection coupler 31 Manual on-off valve 27 Low pressure pipe 40 Cooler 41 Insulation chamber 42 Housing 42a Cooling chamber 43 Cooling pipe 44 Cooling gas supply pipeline 45 Cooling Gas Supply Open / Close Valve 46 Throttle 47 Cooling Gas Recovery Pipeline 48 Recovery Pipeline 50 Snubber Tank 52 Recovery Valve

 ─────────────────────────────────────────────────── ─── Continuation of front page (71) Applicant 000003056 Tokiko Corporation 1-3-6 Fujimi, Kawasaki-ku, Kawasaki-shi, Kanagawa (72) Inventor Kazuo Kanai 6-9-6 Sodegaura, Narashino-shi, Chiba (72) Invention Akira Kobayashi, 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Prefecture, Osaka Gas Co., Ltd. (72) Inventor Manabu Hattori, 4-3 Kawanamoto-cho, Showa-ku, Nagoya, Aichi (72) Inventor, Tokio Yoshida 1-17-1 Chiyo, Hakata-ku, Fukuoka-shi, Fukuoka, Seibu Gas Co., Ltd. (72) Inventor Shigeru Nishiyama 1-3-6 Fujimi, Kawasaki-ku, Kanagawa Prefecture Tokiko Corporation

Claims (1)

[Claims] 1. A gas supply tank for storing compressed gas, a gas supply pipe having one end connected to the gas supply tank and the other end connected to a filling tank, and the gas supply pipe provided in the gas supply pipe. A cooler for cooling the gas supplied from the gas supply tank, a gas supply opening / closing valve arranged in the gas supply pipeline, and a pressure in the gas supply pipeline connected to the tank to be filled. Pressure detection means, a flow meter for measuring the gas filling amount filled in the tank to be filled via the gas supply pipeline, and a gas cooled by the cooler by opening the gas supply opening / closing valve And a control means for closing the gas supply on-off valve when the pressure in the tank to be filled reaches a target pressure.