KR101129865B1 - Residual gas detection and gas state detection apparatus in the gas tank and method thereof - Google Patents

Abstract

TECHNICAL FIELD The present invention relates to a gas tank remaining amount detection and gas state inspection apparatus, and a method thereof.

More particularly, the present invention relates to a method for detecting gas leakage between a gas tank and a gas appliance, for detecting a remaining amount of a gas tank, a gas pressure regulator after the gas tank, and an automatic shut-off valve, The present invention relates to an apparatus for detecting the remaining amount of a gas tank and a gas state inspection apparatus, and a method thereof.

Gas tank, residual gas, gas leakage, pressure sensor

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a gas-

TECHNICAL FIELD The present invention relates to a gas tank remaining amount detection and gas state inspection apparatus, and a method thereof.

Particularly, the present invention can promptly and reliably detect the gas leakage between the gas tank and the gas mechanism with respect to the remaining amount of the gas tank, the gas pressure regulator after the gas tank, and the automatic shut-off valve, And a method for inspecting the state of the gas tank.

Generally, it is premised that a soap water or gas leakage detector is used for the gas supply pipe leakage inspection.

However, if the number of soap is small, there is a possibility that a minute leak of the back of the gas supply pipe or the like may not be found, and if the gas leak detector is used, the maintenance cost for the apparatus main body and the filter is increased.

In addition, since the supply pipe to the indoor from the gas tank is buried in the wall, it is difficult to specify the leak point

In addition, there is a method of closing the valve of the gas tank and observing the drop of the pressure. However, since it takes a few hours to detect a minute leak and since the piping capacity from the gas tank to the gas switching device is large, Is lacking.

The method and apparatus as described above are not satisfactory from the viewpoint of quickly and reliably detecting the gas leakage of the gas supply pipe after the gas tank.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a gas tank inspecting apparatus and a gas state inspecting apparatus, which can determine gas remaining amount, And a method thereof.

According to the present invention as described above, an automotive end valve installed in a gas pipeline of a gas tank and a gas appliance, which cuts off gas supply in accordance with a control signal; A pressure sensor connected to the supply pipe for measuring and outputting the gas pressure; And a memory for inputting and storing information on the diameter and length of the supply pipe and the type of gas supplied to the supply pipe in a state in which the automotive end valve is closed by sending a closing control signal to the automotive end valve, And calculates a predicted pressure change amount at the time of gas leakage according to the calculated pressure change amount, compares the calculated pressure change amount with a change in the pressure value input from the pressure sensor, and determines a gas leak in the supply pipe .

Further, the present invention is characterized in that the present invention further comprises a gas pressure regulator for regulating the gas pressure provided in the high-pressure supply pipe of the gas tank.

Further, the present invention may further comprise a high-pressure pressure sensor installed in the high-pressure supply pipe of the gas tank for measuring the gas pressure, wherein the control module is configured such that when the tank control valve is open and the automatic shut- And the remaining amount of gas is detected according to the pressure value input from the pressure sensor for use and informs the user.

Further, the present invention may further include a temperature sensor for measuring the ambient temperature of the gas tank and the high-pressure supply pipe, wherein the control module corrects the remaining gas amount determined according to the temperature input from the temperature sensor, To the user.

Further, the present invention further includes a high-pressure pressure sensor installed on the high-pressure supply pipe of the gas tank for measuring the gas pressure, wherein the control module controls the closing valve to close the closing valve The length and length of the high-pressure supply pipe and the type of the gas supplied to the high-pressure supply pipe are previously inputted and stored in the provided memory, and the amount of gas The pressure change amount calculated after calculating the estimated pressure change amount at the time of leakage is compared with the change in the pressure value inputted from the pressure sensor, and the gas leakage of the high pressure supply pipe is grasped and notified to the user.

In addition, the supply pipe of the present invention is branched to a plurality of supply pipes, and a gas mechanism is provided in each supply pipe. Each branched supply pipe is installed after the gas intermediate valve to automatically shut off the gas, A pressure sensor for detecting a pressure of a supply pipe between the automotive end valve and the gas device; a pressure sensor for detecting a change in pressure detected by the pressure sensor, And a gas leakage inspection module including a control module for determining a gas leakage.

The present invention also provides a method of controlling a gas turbine, comprising the steps of: (a) transmitting a closing control signal to an automotive valve installed in a gas tank and a supply pipe of a gas appliance to shut off gas supply; (b) a pressure sensor connected to the supply pipe measures and outputs the gas pressure; And (c) the control module calculates the pipe capacity by referring to the memory storing the input information of the diameter and the length of the supply pipe and the gas kind supplied to the supply pipe, and estimates the pressure And comparing the calculated pressure change amount with a change in the pressure value input from the pressure sensor to determine a gas leak in the supply pipe.

(D) measuring and outputting pressure of a high-pressure pressure sensor installed in a high-pressure supply pipe of the gas tank in a state that the tank control valve is open and the automatic shutoff valve is closed; (e) the control module recognizing the remaining gas amount according to the pressure value input from the high pressure pressure sensor; (f) measuring a temperature of the gas tank and a temperature sensor for measuring an ambient temperature of the high-pressure supply pipe; (g) the control module corrects the gas remaining amount determined according to the temperature input from the temperature sensor; And (h) informing the user of the detected residual amount.

(I) the control module transmits a closing control signal to the vehicle end valve in a state in which the tank control valve is closed to close the vehicle end valve; (j) measuring and outputting pressure of a high-pressure pressure sensor connected to the high-pressure supply pipe; (k) calculating the piping capacity according to the stored information of the memory in which the control module preliminarily receives information on the diameter and length of the high-pressure supply piping and the gas type supplied to the high-pressure supply piping; And (l) the control module calculates an expected pressure change amount at the time of gas leakage with reference to the calculated piping capacity, compares the calculated pressure change amount with a change in the pressure value input from the high pressure pressure sensor, And detecting the leak and notifying the user of the leak.

According to the present invention, it is possible to easily find out and cope with a defect caused by an initial installation work or a minute leakage due to aged deterioration from a gas supply pipe after a gas tank, and an effect of preventing gas leakage due to installation defects or the like can be prevented have.

Further, according to the present invention, the pressure in the gas tank is always detected by the high-pressure pressure sensor, so that it is possible to know the replacement timing of the gas tank.

Further, according to the present invention, since the automatic shut-off valve is provided between the supply pipes, it is possible to prevent the supply pipe pressure from expanding due to a change in temperature and to prevent the high pressure from being generated. It is possible to prevent fire accidents due to soaring flames.

Hereinafter, the remaining amount of gas tank and the apparatus for inspecting the state of gas according to the embodiment of the present invention and the method thereof will be described in detail with reference to the drawings of FIG. 1 and the following figures.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of a gas tank residual amount detection apparatus and a gas state inspection apparatus according to an embodiment of the present invention; FIG.

Referring to FIG. 1, the apparatus for detecting the remaining amount of a gas tank and the apparatus for inspecting a gaseous state 13 according to an embodiment of the present invention includes a tank control valve 2 installed at an outlet of a gas tank 1, A pressure sensor 4 for high pressure, an open-end valve 5 provided between the gas tank 1 and the gas pressure regulator 6 for controlling gas supply under the control of the control module 8, A pressure sensor 7, a control module 8 and a temperature sensor 9 for measuring and outputting the ambient temperature of the gaseous state inspecting device 13.

A gas intermediate valve 11 is provided in the supply pipe 10 between the gas state inspecting device 13 and the gas appliance 12 so that the user can manually supply the gas from the gas tank 1 to the gas appliance 12 So that it can be adjusted.

The high pressure pressure sensor 4 is installed in the high pressure supply pipe 3 connected to the outlet of the gas tank 1 to measure and output the pressure of the gas tank 1, It is possible to grasp the remaining amount of the gas in the gas tank 1 according to the measured pressure value and notify the user of the detected residual amount of gas or to grasp the change in the pressure value measured by the control module 8, It is necessary to inform the user whether or not the gas leakage occurs.

Next, the gas pressure regulator 6 is installed in the high-pressure supply pipe 3 connected to the outlet of the gas tank 1, and adjusts the pressure of the gas supplied from the gas tank 1 according to the operation of the user, So that gas is supplied to the supply pipe 10 by the gas pressure.

The pressure sensor 7 is installed in the supply pipe 10 connected to the outlet of the gas pressure regulator 6 and measures the gas pressure and outputs it to the control module 8.

Next, the control module 8 receives the pressure value measured by the high-pressure pressure sensor 4, and notifies the user of the remaining amount of the gas by checking the residual amount of the gas in the gas tank 1 according to the measured pressure value.

At this time, the control module 8 controls the gas tank 1 and the high-pressure pipe 3 in accordance with the temperature of the gas tank 1 or the high-pressure pressure pipe 3 in a state in which the tank control valve 2 is opened and the automatic shut- The pressure value measured by the high-pressure pressure sensor 4 may be different when the same gas remains, and after correcting the pressure value by referring to the temperature measured by the temperature sensor 9, The control module 8 corrects the pressure value measured by the high pressure pressure sensor 4 by using the temperature measured by the temperature sensor 9, If the calibrated gas remaining amount is less than the reference value after calibrating the remaining gas amount calculated after calculating the remaining gas amount according to the pressure value measured by the pressure sensor 4 for use by using the temperature measured by the temperature sensor, To notify Can be implemented.

When the pressure value measured by the high pressure pressure sensor 4 decreases with time in a state in which the tank control valve 2 and the short valve 5 are closed, the control module 8 controls the supply of the high- There is a possibility of a minute gas leakage in the piping 3, so that information such as the diameter and length of the high-pressure supply piping 3 and the kind of gas supplied to the high-pressure supply piping 3 are input in advance to the control module 8 (Pressure change amount / required time) at the time of gas leakage according to the determined piping capacity is calculated, and then the calculated pressure change amount is stored in a memory (not shown) It is determined whether or not the amount of change in the pressure value input from the sensor 4 is satisfied and whether or not the gas leakage is detected.

The control module 8 also controls the supply line 10 when the gas intermediate valve 11 connected to the supply line 10 is closed or the button of the gas appliance 12 is closed after closing the short- Is supplied from the pressure sensor 7 to the supply pipe 10

If the pressure is reduced, there is a possibility of gas leakage in the supply pipe 10, so that information such as the diameter and length of the supply pipe 10 and the gas type supplied to the supply pipe 10 are previously stored in the control module 8 And calculates the predicted pressure change amount (pressure change amount / required time) at the time of gas leakage according to the determined piping capacity, and then calculates the calculated pressure change amount as pressure It is determined whether or not the amount of change in the pressure value input from the sensor 7 is satisfied and whether or not the gas leakage is detected.

The control module 8 receives the pressure measurement value inputted from the pressure sensor 7 and judges whether the gas appliance 12 is used or not, and opens or closes the valve 5 of the automobile.

In addition, the control module 8 stores the combustion time of the gas appliance 12 in the memory, and stores information such as the number of open / close times of the automatic shutoff valve 5 in the memory.

That is, when the control module 8 determines that the gas appliance 12 is continuing to burn after completing the gas leakage inspection, the control module 8 cumulatively stores the combustion time in the memory and performs opening and closing operations on the short- And counts the number of times of opening and closing of the counted number of open-ended valves 5 in the memory.

In this way, the control module 8 can determine the approximate combustion time and the number of times of opening and closing of the automatic shutoff valve 5. For example, if the combustion time is longer than a predetermined time or the number of open / The user may be informed that repair or replacement of the product is necessary.

2 is a configuration diagram of a remaining amount of gas tank and an apparatus for inspecting the state of gas according to another embodiment of the present invention. The difference from FIG. 1 is that the short valve 5 is located behind the gas pressure regulator 6 , And other configurations are the same.

The operation of the gas tank remaining amount detection and gas state inspection apparatus according to another embodiment of the present invention shown in FIG. 2 is the same as the gas tank residual amount detection and gas state inspection apparatus according to the embodiment of FIG.

FIG. 3 is a block diagram of a remaining amount of gas tank and a gas state inspection apparatus according to another embodiment of the present invention. FIG. 3 is different from FIG. 1 in that a plurality of gas appliances 12 are connected to a supply pipe 10 to be.

Due to this difference, a plurality of gas intermediate valves 14 are attached to the supply piping 10, and gas leaks between each gas intermediate valve 14 and the gas mechanism 12 and the use of the gas mechanism 12 The gas leakage inspection module 14 is provided between each gas intermediate valve 14 and the gas mechanism 12 so as to grasp the gas leakage of the supply pipe in order to individually determine whether or not the gas leakage occurs.

The gas leakage inspection module 14 is composed of a pressure sensor (not shown), a control unit (not shown), and a vehicle end valve (not shown) So as to determine whether there is a gas leak in the supply pipe so that it can be determined whether or not the gas appliance 12 is opened or closed.

The gas leakage inspection module 14 determines that there is an increase in pressure in the supply pipe between the gas intermediate valve 14 and the gas mechanism 12 and that the gas is leaked due to wear or the like in the gas intermediate valve 14, And informs the user of the result of detection of gas leaking from the supply pipe between the gas intermediate valve 14 and the gas mechanism 12 when there is a decrease in pressure.

In addition, when the gas leakage measurement module 14 detects the fluctuation component that the pressure value measured by the pressure sensor maintains a constant value and then decreases while the pressure value is repeatedly increased or decreased, the ignition operation of the gas appliance 12 When it is determined that a swinging component that repeats the increase and decrease of the pressure value is detected while the automobile single-side valve is opened and the constant value is maintained while maintaining the constant value, it is determined that the gas appliance 12 is extinguished and the automotive valve is closed .

FIG. 4 is a view showing the configuration of a residual gas amount detector and a gas status inspection apparatus according to another embodiment of the present invention, which is different from FIG. 1 in that the gas pressure regulator 6 is not included in the gas status inspection apparatus , And other configurations are the same.

The operation of the gas tank residual amount detection and gas state inspection apparatus according to another embodiment of the present invention shown in FIG. 4 is the same as that of the gas tank residual amount detection and gas state inspection apparatus according to one embodiment shown in FIG.

If the gas state testing device is configured not to include the gas pressure regulator 6 as described above, the cost can be reduced and the device can be manufactured in a relatively small size.

Hereinafter, the operation of the remaining amount of gas tank and the operation of the gas state testing apparatus according to the embodiment of the present invention will be described in detail with reference to FIG. 5 and subsequent drawings.

<Gas Leakage Test Between Gas Tank and Automobile End Valve>

Here, the gas leakage inspection means that the gas is leaked from the high-pressure supply pipe 3.

5, the gas is filled in the high-pressure supply pipe 3 in advance, and the tank control valve 2 is closed (S108). Then, the control module 8 controls the closing valve 5 (S110), and causes the vehicle-body-end valve 5 to close (S112).

Thereafter, when the high-pressure pressure sensor 4 measures the pressure and outputs it to the control module 8 (S114), the control module 8 determines whether there is a pressure change (S116).

At this time, as a result of observing the pressure change, the control module 8 detects that there is an abnormality in the high-pressure supply pipe 3 so that the gas leaks finely, and accordingly, the pressure measured by the high- (S118), and notifies the user of the result (S120). [0051] In step S118, the controller determines that the gas is leaking from the high-pressure supply pipe.

6, when the measured pressure gradually decreases as time passes, the control module 8 calculates the pressure decrease amount DELTA P and the descending time T, It is determined that gas leaks between the tank control valve 2 and the automotive valve 5.

On the contrary, when the control module 8 observes the pressure change and there is no pressure change in the high pressure supply pipe, the control module 8 determines that the tank control valve 2 and the short valve 5 are normal (S122) To the user (S124).

<Gas Leakage Test of Automobile End Valve and Gas Device (Gas Middle Valve)>

Here, the gas leakage inspection means to check whether gas is leaked from the supply pipe 10

7, when the gas appliance 12 is in the unused state, the control module 8 sends a closing control signal to the short-circuit valve 5 (S210) to close the short-circuit valve 5 (S212).

Thereafter, when the pressure sensor 7 measures the pressure and outputs it to the control module 8 (S214), the control module 8 determines whether there is a pressure change (S216).

At this time, as a result of observing the pressure change, the control module 8 has an abnormality in the supply pipe 10 and the gas leaks out finely, and accordingly the pressure measured by the pressure sensor 7 gradually decreases with time , It is determined that the gas is leaking from the supply pipe 10 (S220), and the result is reported to the user (S222).

8, when the measured pressure gradually decreases as time passes, the control module 8 calculates the pressure drop amount DELTA P and the descending time T to calculate the pressure drop amount DELTA P, It is determined that the gas leaks between the gas supply source 12 and the gas supply source 12.

On the other hand, when the control module 8 observes the pressure change, it is determined that the pressure between the valve 5 and the gas supply 12 is normal (S224), and the result is sent to the user (S226).

In the above description, the gas leakage between the automotive vehicle end valve 5 and the gas mechanism 12 is checked. If the gas intermediate valve 11 is closed and the gas leakage is checked in the same manner as described above, ) And the gas intermediate valve (11).

&Lt; Gas residual amount test &

Here, the inspection of the residual gas amount means the measurement of the residual gas amount of the gas tank 1.

Referring to FIG. 9, the control module 8 transmits a closing control signal to the short-circuiting valve 5 (S310) so that the short-circuiting valve 5 is closed (S312).

Then, the temperature measured by the temperature sensor 9 is inputted (S314), and the pressure measured by the high-pressure pressure sensor 4 is input (S316).

Thereafter, after correcting the pressure value measured by the high-pressure pressure sensor 4 using the temperature measured by the temperature sensor 9 (S318), it is determined whether the current pressure is lower than the reference pressure (S320 ).

If the current pressure is higher than the reference pressure, the monitoring is continued.

If it is determined that the current pressure is lower than the reference pressure, it is determined whether the measured duration is equal to or greater than a predetermined time (S324).

As a result of the determination, the monitoring is continued if it is not longer than the predetermined time, This state is notified to the user (that is, the remaining gas amount is notified) since it is necessary to replenish or replace the gas (S326), and the process is terminated

Although the pressure value measured by the high-pressure pressure sensor 4 is corrected using the temperature measured by the temperature sensor 9 in the above description, the remaining amount of the gas according to the pressure value measured by the high- The calculated remaining gas amount may be corrected by using the temperature measured by the temperature sensor, and then, when the corrected remaining gas amount is less than or equal to the reference value, such a state may be notified to the user.

<Inspection of gas appliance use>

Here, the gas appliance use inspection means an operation of automatically opening / closing the short-circuiting valve 5 in response to the operation of the gas opening / closing button when the gas user intends to use or stop the gas appliance. That is, when the user opens the gas opening / closing button to open the gas opening / closing button for the user to use the gas, the automatic closing valve is opened to supply the gas. When the gas opening / closing button is closed for stopping the gas use, Gas supply is interrupted.

Therefore, according to the present invention, since the gas is opened only when the gas is used and is automatically locked when not in use, the user who has to open and close the intermediate valve

It is not necessary to close the gas opening / closing apparatus at the time of going to bed or going out, and it can be utilized as a very useful means as an earthquake countermeasure.

In the present invention, it is very important to judge the ignition and extinguishing action of the gas appliance. In the case of the present invention, such determination of ignition / extinguishment is not a direct ignition signal of the gas appliance, but is independent of the pressure change of the gas supply pipe. In the present invention, The operation is performed by the following technical arrangement and process.

First, when the pressure on the inlet side valve 5 is P1 and the pressure on the outlet side is P2, if there is no gas leakage between the valve 5 and the gas opening / closing button P2, It is the same as the virtual pressure of the pressure P1. At this time, when the user presses the gas opening / closing button to open, P2 sharply drops from the stable state as shown in FIG. 10, and swings for a while, and maintains stable pressure again upon ignition. One measured data for this phenomenon is shown in Fig.

The present invention focuses on a phenomenon in which the pressure drops sharply during ignition and judges it as an ignition signal. Specifically, the automotive valve is opened when the following three conditions are satisfied. (The same reference numerals as those shown in Fig. 10 are used for the reference numerals in the following conditions)

1. The pressure difference ΔP1 will occur when P21 is closed when the valve is closed and P21 is stored several seconds before the current point.

2. There should be a pressure difference ΔP2 when the pressure P22 after the pressure difference ΔP1 is in a stable state and when it is compared with P22 and P21 (a few seconds before).

3. There should be AC component which is gas pressure displacement (fluctuation).

The comparison operation, determination and generation of an operation signal for the short-circuit valve 5 are performed by the control module 8, and the control module can be implemented by configuring a circuit using a microcomputer chip or the like.

However, there is no guarantee that the gas user is ignited only by the operation of pressing the opening / closing button (ignition is successful). Therefore, it is necessary to judge whether the gas range is lit. In this method, it is possible to determine whether or not the ignition has succeeded based on the pressure change at this time by closing the valve at the very short moment (several milliseconds). That is, when the valve is closed, the gas pressure is lowered when the valve is closed, so it is determined that the ignition is successful and the valve is opened again to continue the combustion. On the other hand, in the case of no fire, the gas pressure does not change.

On the other hand, even when the gas user stops using the gas by pressing the open / close button, the control module opens the valve for a very short time. If the pressure value of the pressure sensor does not change when the gas valve is opened in this way, The control module re-identifies that it has been done properly so that the vehicle end valve is kept closed.

On the other hand, even when the gas user stops using the gas by pressing the open / close button, the control module opens the valve for a very short time. If the pressure value of the pressure sensor does not change when the gas valve is opened in this way, The control module re-identifies that it has been done properly so that the vehicle end valve is kept closed.

Next, when the gas user closes the gas opening / closing button, the pressure detected from the pressure sensor suddenly rises from the stable state as shown in Fig. 10 and swings for a while, and becomes stable pressure simultaneously with extinguishing. Therefore, the condition for closing the valve at the vehicle end is specifically

The following three conditions are satisfied.

1. The pressure difference ΔP3 will occur when compared with the pressure value P22 when the valve is open and P22, which is stored several seconds before the current point.

2. There should be a pressure difference ΔP4 when the pressure P23 after the pressure difference ΔP3 has become stable and also when compared with P23 and P22 (a few seconds before).

3. There should be AC component which is gas pressure displacement (fluctuation).

Further, according to the present invention as described above, when the gas is not used, the valve at the end of the vehicle is in a closed state. However, if there is gas leakage in the gas supply pipe after the outlet of the end- The gas pressure gradually decreases. If the pressure in the piping is lower than the minimum pressure required for operation of the gas range due to the decrease in the gas pressure (this usually happens if the gas supply is not used for a long time) do. In order to prevent such a case, the present invention controls such that when the pressure value detected by the pressure sensor drops below a predetermined reference pressure value at the time of non-use of the gas appliance, the automotive end valve is opened for a very short time and closed when the gas pressure returns . However, if the number of times of opening / closing exceeds the set number of times, it may be considered that there is a problem in the gas supply pipe itself. In this case, the control module judges that gas leakage has occurred and issues an alarm to lock and close the valve.

However, more importantly, when the gas pressure is lower than the lower limit of the gas supply without returning as described above, the gas range is increased This is to prevent this because it is no longer guaranteed to ignite safely. Further, when the pressure becomes zero, the basic contradiction (fluctuation) can not be detected in judging whether the ignition / fire extinguishment is performed in the present invention, which is a logical contradiction. Therefore, in the present invention, the expression "return gas pressure" has two purposes: 1. to detect displacement (swing); 2. to trigger an alarm and enable reliable ignition.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a configuration diagram of a gas tank remaining amount detection and gas state inspection apparatus according to an embodiment of the present invention; Fig.

2 is a configuration diagram of a remaining amount of gas tank and a gas state testing apparatus according to another embodiment of the present invention.

FIG. 3 is a configuration diagram of a remaining amount of gas tank and a gas state testing apparatus according to another embodiment of the present invention. FIG.

4 is a configuration diagram of a remaining amount of gas tank and a gas state testing apparatus according to another embodiment of the present invention.

5 is a flowchart for explaining a process of checking the residual amount of a gas tank according to an embodiment of the present invention and a leakage inspection process of a high-pressure supply pipe of the gas-

6 is a graph showing the pressure change of the high-pressure supply pipe in Figs. 1 to 4. Fig.

FIG. 7 is a flow chart of the process of checking the remaining amount of the gas tank and the leakage inspection of the supply pipe of the gas state inspection apparatus according to the embodiment of the present invention. FIG.

8 is a graph showing the pressure change of the supply pipe in Figs. 1 to 4. Fig.

9 is a flow chart of the remaining amount of gas tank and the remaining amount of gas in the gas state testing apparatus according to the embodiment of the present invention

10 is a graph showing variations in gas pressure during ignition / extinguishing of a gas appliance.

11 is a graph showing an example of measured data on gas pressure fluctuations.

DESCRIPTION OF THE EMBODIMENTS

1: gas tank 2: tank control valve

3: Supply piping for high pressure 4: Pressure sensor for high pressure

5: Automotive valve 6: Gas pressure regulator

7: Pressure sensor 8: Control module

9: Temperature sensor 10: Supply piping

11: gas intermediate valve 12: gas appliance

13: gas state inspection device 14: gas leakage inspection module

Claims (9)

An automotive end valve installed in the gas piping of the gas tank and the gas mechanism for shutting off gas supply in accordance with a control signal; A gas pressure regulator for regulating the gas pressure supplied to the high-pressure supply pipe of the gas tank; A pressure sensor connected to the supply pipe for measuring and outputting the gas pressure; And A memory for inputting and storing information on the diameter and length of the supply pipe and the type of gas supplied to the supply pipe in a state in which the valve is closed by sending a closing control signal to the valve And a control module for determining the gas leakage in the supply pipe by comparing the calculated pressure change amount with the change in the pressure value inputted from the pressure sensor And the gas state inspection device. delete In claim 1 Further comprising a high-pressure pressure sensor provided in a high-pressure supply pipe of the gas tank for measuring a gas pressure, wherein the control module is configured such that when the tank control valve is opened and the automatic shut- And determining a remaining amount of the gas according to a pressure value of the gas tank, and notifying the user of the remaining amount of the gas tank. In claim 3 Further comprising a temperature sensor for measuring an ambient temperature of the gas tank and the high-pressure supply pipe, Wherein the control module corrects the remaining amount of gas detected according to the temperature input from the temperature sensor and notifies the user of the corrected remaining amount of the gas. In claim 1 Further comprising a high-pressure pressure sensor installed in a high-pressure supply pipe of the gas tank for measuring a gas pressure, The control module transmits a close control signal to the automotive end valve in a state in which the tank control valve is closed so that the automotive end valve is closed so that the diameter and length of the high pressure supply pipe are supplied to the supplied memory, And the calculated pressure change amount at the time of gas leakage is calculated from the piping capacity according to the stored information, and then the calculated pressure change amount is compared with the change in the pressure value inputted from the pressure sensor, And the gas leakage is detected and notified to the user. In claim 1 The supply pipe is branched into a plurality of supply pipes, gas pipes are provided in the respective supply pipes, Each of the branched supply pipes is provided with an automotive end valve provided after the gas intermediate valve for automatically shutting off the gas or automatically connecting the gas, a pressure sensor for detecting the supply pipe pressure between the automotive end valve and the gas mechanism, And a control module for detecting a change in the pressure detected by the pressure sensor and determining a gas leakage of the supply pipe based on the change in the pressure. The gas leakage checking module according to claim 1, And gas condition inspection device. (a) shutting off the gas supply by transmitting a closing control signal to the automotive end valve installed in the gas tank and the supply pipe of the gas appliance, by the control module; (b) a pressure sensor connected to the supply pipe measures and outputs the gas pressure; (c) The control module calculates the pipe capacity by referring to the memory storing the diameter and the length of the supply pipe and the gas type supplied to the supply pipe in advance, and estimates the pressure variation And comparing the calculated pressure change amount with a change in the pressure value input from the pressure sensor to determine a gas leak in the supply pipe; (d) measuring and outputting pressure of a high-pressure pressure sensor installed in a high-pressure supply pipe of the gas tank in a state that the tank control valve is open and the automatic shutoff valve is closed; (e) the control module recognizing the remaining gas amount according to the pressure value input from the high pressure pressure sensor; (f) measuring a temperature of the gas tank and a temperature sensor for measuring an ambient temperature of the high-pressure supply pipe; (g) the control module corrects the gas remaining amount determined according to the temperature input from the temperature sensor; And (h) informing the user of the detected residual amount. delete In claim 7 (i) the control module sends a closing control signal to the vehicle end valve in the closed state of the tank control valve to close the vehicle end valve; (j) measuring and outputting pressure of a high-pressure pressure sensor connected to the high-pressure supply pipe; (k) calculating the piping capacity according to the stored information of the memory in which the control module preliminarily receives information on the diameter and length of the high-pressure supply piping and the gas type supplied to the high-pressure supply piping; And (1) The control module calculates an estimated pressure change amount at the time of gas leakage with reference to the calculated piping capacity, compares the calculated pressure change amount with a change in the pressure value input from the high pressure pressure sensor, And informing the user of the remaining amount of the gas tank.

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