JP3462592B2 - Gas supply device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas supply apparatus, and more particularly, to a gas supply apparatus in which a gas filling time in a tank to be filled is made constant according to a capacity of the tank to be filled. The present invention relates to a gas supply device. 2. Description of the Related Art For example, as a gas supply device for supplying compressed natural gas (CNG) or the like obtained by compressing natural gas to another tank, there is a device as disclosed in Japanese Utility Model Laid-Open No. 4-64699. . The apparatus of this publication employs a method of rapidly filling a compressed gas, in which a gas whose pressure has been increased to a predetermined pressure or more by a compressor is temporarily stored in a gas supply tank, and then stored in the gas supply tank. Gas is injected into a fuel tank (filled tank) of an automobile, and the fuel tank is filled until a predetermined pressure is reached. Further, in the above-mentioned apparatus, constant pressure increase control is performed based on a pressure value detected by a pressure sensor provided on the gas supply apparatus side, and the control is not related to the remaining amount or the residual pressure before filling the fuel tank. Instead, the gas from the gas supply tank was filled by the pressure control valve by the constant pressure increase control until the gas reached the target filling pressure. Accordingly, the supply pressure supplied to the fuel tank increases at a constant rate, and the pressure of the fuel tank increases due to the gas filling, and the control pressure by the pressure control valve increases to increase the filling pressure of the fuel tank. To the target filling pressure. [0005] However, in the gas supply device having the above-described structure, constant pressure increase control is performed based on a pressure value detected by a pressure sensor provided on the gas supply device side. Since the gas is supplied to the fuel tank by the constant pressure rise control, the flow rate of the gas supplied to the fuel tank is not constant.For example, regardless of the pressure of the fuel tank, the gas from the gas supply tank is filled into the fuel tank. Therefore, the flow rate of the gas supplied to the fuel tank tends to fluctuate. For this reason, in the conventional gas supply device, the filling pressure of the fuel tank can be increased at a fixed rate. If the flow rate changes rapidly, accurate flow rate measurement cannot be performed. Therefore, if the flow rate of the gas supplied to the fuel tank fluctuates due to a change in pressure, the measurement accuracy varies, and a measurement error is likely to occur. Therefore, an object of the present invention is to provide a gas supply device that solves the above-mentioned problems. According to the present invention, there is provided a gas supply tank for storing a compressed gas, and a gas supply tank having one end connected to the gas supply tank and the other end connected to a tank to be filled. A pipe, valve means provided in the gas supply pipe, pressure detection means provided in the gas supply pipe to detect a pressure filled in the tank to be filled, and an end of the gas supply pipe While reading the pressure value detected by the pressure detecting means in a state where the portion is connected to the connection portion of the filling tank, estimating means for estimating the capacity of the filling tank,
Control means for adjusting the valve opening of the valve means so that the flow rate supplied to the filling tank is optimized according to the capacity of the filling tank estimated by the estimation means. And The capacity of the tank to be filled is estimated based on the pressure value detected by the pressure detecting means, and the flow rate supplied to the tank to be filled is determined according to the capacity of the tank to be filled estimated by the estimating means. By adjusting the valve opening degree of the valve means so as to be optimal, it becomes possible to perform a constant filling of the gas supplied to the filling tank. FIG. 1 and FIG. 2 show an embodiment of a gas supply apparatus according to the present invention. In FIG. 1, a gas supply device 1 is installed at, for example, 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 gas supply device 1 is generally for compressing city gas to a predetermined pressure to generate a pressurized gas, and for supplying the gas compressed by the pressure generation unit 4 to the fuel tank 3. Dispenser unit 5
And more. The pressure generating unit 4 includes a branch line 1 connected to a medium-pressure line 10 before city gas or the like is branched to homes.
1, a multi-stage compressor 12 for compressing gas is provided. The compressor 12 is provided with, for example, a plurality (three or four) of cylinders for compressing gas,
The gas compressed by the previous cylinder is pressurized to a higher pressure by the next cylinder, and the medium pressure pipe 1
The gas supplied from 0 is compressed stepwise. Further, a check valve 14 for preventing backflow of gas generated by the compressor 12 is provided in the high-pressure line 13 drawn from the compressor 12.
A high-pressure gas accumulator (gas supply tank) 16 is connected to an end of a branch pipe 15 branched from the high-pressure pipe 13. Incidentally, the high-pressure gas accumulator 16 is generally called a gas accumulator in literatures and the like. The high-pressure gas accumulator 16 stores a high-pressure gas compressed by the compressor 12,
The gas compressed to 50 kgf / cm ² is stored. The high-pressure line 13 is provided with an on-off valve 17 composed of an electromagnetic valve and a pressure transmitter 18. The pressure transmitter 18 has a high pressure line 1 therein.
A pressure sensor for detecting the pressure of the gas flowing through the pressure sensor 3 is provided, and a detection signal corresponding to the pressure of the gas is transmitted to the control circuit 19. The on-off valve 1 is controlled by a command from the control circuit 19.
The valve 7 is closed when the gas compressed by the compressor 12 is supplied to the high-pressure gas accumulator 16 to prevent the gas from flowing out to the dispenser unit 5, and the gas in the high-pressure gas accumulator 16 is supplied to the fuel tank. When 3 is charged, the valve is opened. When the pressure of the high-pressure gas accumulator 16 reaches a predetermined pressure (in this embodiment, 250 kgf / cm ² ), the on-off valve 17 is closed, and the pressure generating unit 4 is in a standby state in which the filling operation can be performed. Becomes Reference numeral 20 denotes a recovery tank for temporarily storing the gas recovered via the recovery pipe 41 after gas filling is completed, as will be described later. This collection tank 20
Is provided with a pressure switch 21 which is turned on when the internal pressure reaches a predetermined pressure and outputs a detection signal to the control circuit 35. The recovery tank 20 has a capacity that is sufficiently large with respect to the amount of gas remaining in the detachable coupler 42 described later. Therefore, after the fuel tank 3 is completely filled with gas, the gas in the detachable coupler 42 is instantaneously discharged to the collection tank 2.
0, and the pressure inside the detachable coupler 42 is reduced to substantially the atmospheric pressure. Further, in the present embodiment, the tip of the collection pipe 41 is connected to the collection tank 20. However, the present invention is not limited to this. For example, when the tip of the collection pipe 41 is sufficiently separated from the dispenser unit 5, You may make it open. The pressure generating unit 4 and the dispenser unit 5 are connected via a gas supply line 28. The gas supply line 28 extending into the dispenser unit 5 is provided with a gas supply line 2 comprising an electromagnetic valve.
A gas supply opening / closing valve (valve means) 29 for opening / closing 8, a primary pressure transmitter 30 for detecting a primary pressure of gas supplied from the pressure generating unit 4, and measuring a gas flow rate flowing through a gas supply pipe 28. Coriolis-type mass flow meter 31, a pressure control valve 32 for controlling the pressure of gas supplied to the downstream side to a predetermined pressure, and a secondary for detecting a secondary pressure of gas discharged from the pressure control valve 32 A pressure transmitter 33 and an emergency disconnection coupler 34 that separates when pulled by a predetermined force or more are provided. The mass flow meter 31 is a vibratory mass flow meter that vibrates a sensor tube through which gas passes and outputs a measurement signal corresponding to a phase difference between the inflow side and the outflow side due to Coriolis force. In addition, since the measurement accuracy of the mass flow meter 31 decreases due to changes in temperature and pressure, if the flow rate fluctuates rapidly due to pressure fluctuations, the flow measurement accuracy decreases and the filling accuracy of the fuel tank 3 decreases. I will. The opening degree of the gas supply opening / closing valve 29 is controlled by a command from the control circuit 35 so that the filling flow rate into the fuel tank 3 becomes an optimum flow rate, as will be described later. Therefore, the filling flow rate to the fuel tank 3 is controlled to a predetermined flow rate, and the constant filling control is performed. Therefore, since the gas filling flow rate is stable,
The flow measurement accuracy by the mass flow meter 31 is improved, and more accurate gas filling can be performed. The memory 36 has a capacity estimation program for estimating the capacity of the fuel tank 3 based on the pressure value detected by the secondary pressure transmitter 33,
The filling flow rate to the fuel tank 3 is calculated based on the capacity of
A control program for controlling the opening degree of the gas supply opening / closing valve 29 is stored. The primary pressure transmitter 30 and the secondary pressure transmitter 33
Means that a detection signal corresponding to the pressure detected at each mounting position is transmitted to the control circuit 35. Also, mass flow meter 3
Numeral 1 is configured to accurately measure the flow rate of a relatively high-pressure gas, and transmits a flow rate measurement signal (flow rate pulse) to the control circuit 35. One end of a high-pressure gas supply tube 37 that can withstand high-pressure gas is connected to the emergency disconnecting coupler 34,
The other end of the high-pressure gas supply tube 37 is connected to the inflow port a of the three-way valve 38. Further, a supply hose 39 having flexibility is connected to the filling port b of the three-way valve 38. At the end of the supply hose 39, a detachable coupler 40 is provided. Detachable coupler 40
Is connected to the detachable coupler 42 on the side of the fuel tank 3 before gas filling, and is separated from the detachable coupler 42 after gas filling of the fuel tank 3 is completed. The exhaust port c of the three-way valve 38 is provided with a recovery pipe 41 for releasing the residual gas in the detachable coupler 40 to the outside in order to enable the detaching operation of the detachable coupler 40 after the gas filling is completed.
It is connected to the. The other end of the collection pipe 41 is connected to the above-described collection tank 20, and supplies the residual gas in the detachable coupler 40 to the collection tank 20. The three-way valve 38 is switched by a manual operation by an operator after gas filling so that the filling port b and the exhaust port c are communicated and the inflow port a is shut off. Further, the three-way valve 38 is switched so that the inflow port a and the filling port b are communicated with each other and the exhaust port c is shut off before the gas filling. The emergency disconnecting coupler 34 is provided inside the emergency disconnecting coupler 34, when the vehicle 2 is started while the detachable coupler 40 is still connected to the detachable coupler 42 on the fuel tank 3 side. A check valve (not shown) closes to prevent gas leakage. The detachable coupler 40 and the detachable coupler 42
Means that a check valve (not shown) is provided inside each, and when not connected to each other, the check valve closes,
When the detachable coupler 40 and the detachable coupler 42 are connected, each check valve is displaced to the valve-opening position and becomes in a communication state with each other. Reference numeral 43 denotes a display for displaying the flow rate and supply pressure of the gas filled in the fuel tank 3. The control device 35 is connected to each of the above-mentioned devices, and is connected to a start button 51, a display 52, an alarm device 53, a filling display lamp 54, and a gas release lamp 55. The control circuit 35 calculates the flow rate by integrating the flow rate pulses output from the mass flow meter 31 based on the respective programs registered in advance, and calculates the flow rate. The gas supply opening / closing valve 29, the primary pressure transmitter 30, The operation control of the mass flow meter 31, the pressure control valve 32, and the secondary pressure transmitter 33 is executed.
The control circuit 35 and the control circuit 19 exchange control signals with each other, and control each device in cooperation with each other. A pipe 44 connected to the fuel tank 3 of the automobile 2 filled with high-pressure gas has a detachable coupler 42 to which the detachable coupler 40 of the dispenser unit 5 is coupled from the upstream side, and a gas filled gas. A manual opening / closing valve 45 that is opened by manual operation at the time of operation and a check valve 46 that prevents the gas filled in the fuel tank 3 from flowing back are provided. Next, before describing the processing executed by the control circuit 35, a gas filling operation in the gas supply device 1 having the above configuration will be described. When filling the fuel tank 3 of the automobile 2 with gas, the operator first connects the detachable coupler 40 of the dispenser unit 5 to the detachable coupler 42 of the automobile 2. Then, the operator opens the manual opening / closing valve 45 of the automobile 2 and performs a switching operation so that the inflow port a and the filling port b of the three-way valve 38 communicate with each other. Next, when the filling start button 51 is turned on, the on-off valve 17 is opened and the gas supply on-off valve 29 is opened. Accordingly, the high-pressure gas stored in the high-pressure gas accumulator 16 is supplied to the gas supply line 28, the high-pressure gas supply hose 37, the detachable couplers 40 and 42, and the line 4
The fuel tank 3 is filled through the fuel tank 4. Then, the control circuit 35 controls the valve opening of the gas supply opening / closing valve 29 based on the residual pressure of the fuel tank 3 to fill the fuel tank 3 with a fixed amount of gas. When the fuel tank 3 reaches a full state, the on-off valve 17 is closed and the gas supply on-off valve 29 is closed. The gas filling amount that has passed through the gas supply line 28 is measured by the mass flow meter 31, and a flow pulse corresponding to the gas filling amount is output to the control circuit 35. Thus, the control circuit 35 determines the supply pressure detected by the secondary pressure transmitter 33 and the mass flow meter 31
The amount of gas filling the fuel tank 3 is calculated on the basis of the number of flow rate pulses supplied from the controller 3 and displayed on the display 43. When gas filling into the fuel tank 3 is completed,
After closing the manual on-off valve 45 on the side of the automobile 2, the operator
The three-way valve 38 is switched so that the filling port b communicates with the exhaust port c and the inflow port a is shut off.
That is, the three-way valve 38 collects the gas remaining in the detachable couplers 40 and 42 and the supply hose 39 through the collection conduit 41 in the collection tank 20 and decompresses the gas, thereby enabling the detachment operation of the detachable coupler 40. . Further, the operator separates the detachable coupler 40 of the dispenser unit 5 from the detachable coupler 42 of the automobile 2. This completes a series of gas filling operations. Here, the processing executed by the control circuit 35 of the gas supply device 1 having the above configuration will be described. FIG. 2 is a main flowchart executed during the gas filling operation. FIG. 3 shows a predetermined time (for example, 1
It is activated by a timer interrupt every 0 msec). The operator operates the gas supply line 2 as described above.
The detachable coupler 40 provided at the end of the fuel tank 8 is connected to the detachable coupler 42 of the fuel tank 3, and thereafter, the manual on-off valve 45 is opened. Then, the operator turns on the start button 51. In FIG. 2, the control circuit 35 determines in step S1
(Hereinafter, “step” is omitted), variables are initialized, and in S2, the control system is initialized. In S2, an interrupt process of FIG. 3 described later is executed. At S3, a message prompting the user to prepare for filling the fuel tank 3 with gas is displayed on the display 52. Subsequently, in S4, the detachable coupler 40 of the dispenser unit 5 is connected to the detachable coupler 42 of the automobile 2 to check whether or not a preparation OK signal is input from a gas filling preparation OK button (not shown). Therefore, the preparation O from the gas filling preparation OK button is performed.
When the K signal is input, the process proceeds to S5, and a message urging the start of gas filling of the fuel tank 3 is displayed on the display 52. Then, in S6, it is checked whether a start signal from the start button 51 has been input. When a start signal is input from the start button 51, the process proceeds to S7, where a message indicating that the fuel tank 3 is being filled with gas is displayed on the display 52. Then, in S8, it is checked whether a flow pulse from the mass flow meter 31 has been input. When the flow pulse is input from the mass flow meter 31, the process proceeds to S9, where the control processing of the filling operation is executed.
Then, when the gas filling process to the fuel tank 3 is completed,
Proceeding to S10, a message that the gas filling of the fuel tank 3 has been completed is displayed on the display 52. Then, in S11, the gas filling data (filling amount, filling pressure, gas filling amount, date, etc.) into the fuel tank 3 is output and stored in the data file of the memory 36. In S12, the processing of the main flowchart of the gas filling operation is ended. Next, the gas filling interruption processing of FIG. 3 will be described. In the figure, at S21, the pressure detection signal (analog signal) detected by the primary pressure transmitter 30 and the secondary pressure transmitter 33 is converted into a digital signal. Then, the process proceeds to S22, where an input signal from each device is read. In S23, it is checked whether the filling flag is on. If the filling flag is ON in S23, the process proceeds to S24, and it is checked whether a filling stop signal has been input. If the charging flag is OFF in S23, the process proceeds to S25, and the on-off valve 1
7. Close the gas supply on-off valve 29. Further, when the filling stop signal is input in S24, the process proceeds to S26, in which the end flag is turned on, the restart flag is turned on, the filling flag is turned off, and the on-off valve 17 and the gas supply on-off valve 29 are closed. Let it. Also, S2
If the filling stop signal is not input in step S4, S27
And check if the gas filling is stopped or the gas filling is full. In S27, when the gas filling emergency stop or the gas filling is performed, the process proceeds to S28, where the end flag is turned on, the filling flag is turned off, and the on-off valve 17 and the gas supply on-off valve 29 are closed. If it is determined in step S27 that the emergency stop of gas charging or the gas filling is not to be performed, step S2 is executed.
Proceeds to 9, the differential pressure between the secondary pressure P _out detected by the primary pressure P _in the secondary pressure transmitter 33 detected by the primary pressure transmitter 30 to check whether it is 1MPa or less. [0058] In S29, when the differential pressure between the secondary pressure P _out detected by the primary pressure P _in the secondary pressure transmitter 33 detected by the primary pressure transmitter 30 is 1MPa or less, S30 The charging flag is turned off, and the pressure control valve 32, the on-off valve 17, the gas supply on-off valve 29
Is closed. [0059] However, in S29, the primary pressure is detected by the primary pressure transmitter 30 P _in the secondary pressure transmitter 3
The differential pressure with the secondary pressure P _out detected by 3 is 1 MPa
If not, the process proceeds to S31, in which gas filling control described later is performed. In the next step S32, detected values such as gas filling pressure and flow rate are output. Then, in S33, the valve opening of the gas supply on-off valve 29 is output to a D / A converter (not shown). After that, the detected values such as the gas filling pressure and flow rate are stored in the data file of the memory 36 in S34.
Further, the process proceeds to S35, where the number of times of execution of the interrupt of the timer is incremented. This completes a series of gas filling interrupt processing. Next, the gas filling control process executed in S31 will be described with reference to FIG. [0063] In FIG. 4, in S41, second secondary pressure detected by the pressure transmitter 33 P _{ou t} is checked whether the specified pressure (target fill pressure) or less. If the pressure in the fuel tank 3 is equal to or lower than the specified pressure (target charging pressure) in S41, the process proceeds to S42, and it is checked whether a specified time has elapsed from the start of gas filling of the fuel tank 3. S4
In 2, if the specified time has not elapsed from the start of gas filling of the fuel tank 3, the calculation accuracy of the capacity of the fuel tank 3 is not stable in the initial stage of filling, so the process proceeds to S43 and constant pressure increase control is performed. That is, in S43, the target filling pressure is confirmed, and the gas filling time until the target filling pressure is reached and the pressure rise rate are calculated. In step S44, the pressure control is performed so that the pressure increase rate is constant based on the differential pressure between the target filling pressure and the current pressure charged in the fuel tank 3 detected by the secondary pressure transmitter 33. The valve opening of the valve 32 is adjusted. In the next step S45, the flow rate pulse from the mass flow meter 31 is integrated to obtain the integrated flow rate of the gas filling the fuel tank 3, and the secondary pressure P _out detected by the secondary pressure transmitter 33 is obtained. The capacity of the fuel tank 3 is calculated based on the rate of increase of. Note that the capacity of the fuel tank 3 is determined by (integrated flow rate / rising pressure). In S42, if the specified time has elapsed since the start of gas filling of the fuel tank 3,
Proceeding to S46, constant flow rate control is performed. That is, the fuel tank 3
Is calculated and the flow rate according to the capacity of the fuel tank 3 is compared with the current flow rate, and the opening degree of the gas supply opening / closing valve 29 is adjusted so that the flow rate of the gas charged into the fuel tank 3 becomes constant. adjust. When the pressure of the fuel tank 3 reaches the specified pressure (target filling pressure), the process proceeds to S47, where the fuel tank 3
The filling of the gas into is completed. As described above, the constant pressure increase control is performed until a predetermined time elapses from the start of gas filling of the fuel tank 3, and the constant flow rate control is performed after the predetermined time elapses. Therefore, the gas filling time can be shortened. Since the flow rate is stabilized by the constant flow rate control, the measurement accuracy by the mass flow meter 31 is enhanced, and the gas filling amount in the fuel tank 3 can be measured more accurately. Next, a modification of the gas filling control process executed in S31 will be described with reference to FIG. [0069] In FIG. 5, in S51, second secondary pressure detected by the pressure transmitter 33 P _{ou t} is checked whether the specified pressure (target fill pressure) or less. If the pressure in the fuel tank 3 is equal to or lower than the specified pressure (target charging pressure) in S51, the process proceeds to S52, in which the previous pressure is added to the pressure increase rate per unit time to calculate the current target pressure. In S53, if the current pressure is lower than the target pressure, the process proceeds to S54, where pressure increase control is performed. That is, in S54, the valve opening of the pressure control valve 32 is adjusted so that the differential pressure between the target pressure and the current pressure becomes zero. In S55, the optimum flow rate of the gas to be charged into the fuel tank 3 is calculated based on the integrated flow rate and the rising pressure, and stored in the memory 36. If the current pressure is higher than the target pressure in S53, the flow advances to S56 to perform constant flow control. That is, in S56, the optimal flow rate is compared with the current flow rate, and the opening degree of the gas supply opening / closing valve 29 is adjusted so that the fuel tank 3 can be filled with gas at the optimal flow rate. Then, when the pressure of the fuel tank 3 reaches the specified pressure (target filling pressure), the process proceeds to S47, and the filling of the fuel tank 3 with gas is completed. As described above, the current target pressure to be charged into the fuel tank 3 is obtained. When the current pressure is lower than the target pressure, the pressure increase control is performed. When the current pressure is higher than the target pressure, the target pressure is controlled. In addition, since the constant flow rate control is performed at the optimum flow rate, the gas filling time can be shortened, and the flow rate is stabilized by the constant flow rate control. Can be measured. In the above embodiment, the gas supply on-off valve 29
The gas filling flow rate to the fuel tank 3 was adjusted by controlling the valve opening degree, but the present invention is not limited to this, and a flow rate adjusting valve other than the gas supply opening / closing valve 29 is provided in the gas supply pipe 28 to adjust the flow rate. The valve opening of the valve may be adjusted. Further, in the above embodiment, the case where the compressed natural gas (CNG) obtained by compressing the city gas is supplied as an example, but the present invention is not limited to this, and it is also possible to supply the gas such as butane and propane. Of course, it can be applied. In the above-described embodiment, the case where the compressed gas is filled in the fuel tank 3 of the automobile 2 has been described as an example. However, the present invention is not limited to this, and the apparatus for supplying the compressed gas to another container or the like is not limited to this. Of course, the present invention can also be applied to an apparatus configured to be installed in the middle of a pipeline for supplying compressed gas to another place. In the above embodiment, the city gas is compressed from the medium pressure pipe 10 before branching to the home. However, the present invention is not limited to this. For example, the city gas is branched from the medium pressure pipe 10. Alternatively, the gas may be taken out from a household pipe. As described above, according to the present invention, the capacity of the tank to be filled is estimated based on the pressure value detected by the pressure detecting means, and the capacity of the tank to be filled estimated by the estimating means. The gas supplied to the tank to be filled can be filled at an optimum flow rate at a high speed, since the valve opening of the valve means is adjusted so that the flow rate supplied to the tank to be filled is optimized according to In addition to shortening the filling time of the gas and suppressing a change in the flow rate of the gas filling, the flow rate of the filled gas can be measured with high accuracy, so that the filling of the tank to be filled can be performed more accurately.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram of one embodiment of a gas supply device according to the present invention. FIG. 2 is a main flowchart of a process executed by a control device. FIG. 3 is a flowchart of an interrupt process. FIG. 4 is a flowchart of a process of gas filling control. FIG. 5 is a flowchart of a modified example of the gas filling control process. [Description of Signs] 1 Gas supply device 3 Fuel tank 4 Pressure generation unit 5 Dispenser unit 16 High pressure gas accumulator 18 Pressure transmitter 28 Gas supply line 29 Gas supply on-off valve 30 Primary pressure transmitter 31 Mass flow meter 32 Pressure Control valve 33 Secondary pressure transmitter 38 Three-way valve 35 Control circuits 40, 42 Detachable coupler

──────────────────────────────────────────────────続 き Continued on the front page (73) Patent holder 000110099 Tokiko Techno Corporation 3-9-27, Tsurumichuo, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Kazuo Kanai 6-9-6 Sodegaura, Narashino-shi, Chiba Prefecture (72) Inventor Akifumi Kobayashi 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka (72) Inside of Osaka Gas Co., Ltd. (72) Inventor Manabu Hattori 4-3-7, Kawanahonmachi, Showa-ku, Nagoya-shi, Aichi (72) Inventor Toki Yoshida Male 1-17-1, Chiyo, Hakata-ku, Fukuoka, Fukuoka Prefecture, Japan (72) Inventor Kazuhiro Ohara 1-6-3, Fujimi, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Tokiko Corporation (72) Kumagaya, Inventor Shinji 1-6-3 Fujimi, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Tokiko Co., Ltd. (72) Inventor Takuya Matsumoto 1-6, Fujimi, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture (56) References JP-A-6-213399 (JP, A) JP-A-4-224399 (JP, A) JP-A-58-46300 (JP, A) (58) Fields investigated ( Int.Cl. ⁷ , DB name) F17C 5/00-5/06 F17C 13/00-13/04 B60S 5/02

Claims (1)

(57) [Claim 1] A gas supply tank for storing compressed gas, and a gas supply pipe having one end connected to the gas supply tank and the other end connected to a tank to be filled. A valve means provided in the gas supply pipe; a pressure detection means provided in the gas supply pipe to detect a pressure filled in the tank to be filled; and an end of the gas supply pipe. An estimating means for reading a pressure value detected by the pressure detecting means in a state of being connected to a connection portion of the to-be-filled tank, and estimating a capacity of the to-be-filled tank; Control means for adjusting a valve opening of the valve means so that a flow rate supplied to the tank to be filled is optimized according to a capacity of the tank.