KR20110013768A - Residual gas detection and gas state detection apparatus in the gas tank and method thereof - Google Patents

Abstract

PURPOSE: A device and a method for detecting the remaining amount of a gas tank and for inspecting the gas state are provided to enable a user to recognize the replacement time of the gas tank since the pressure of the gas tank is detected using a high-pressure sensor at ordinary times. CONSTITUTION: A device for detecting the remaining amount of a gas tank and for inspecting the gas state comprises an automatic blocking valve(5), a pressure sensor(7) and a control module(8). The automatic blocking valve is installed on the gas tank and the feeding pipe of the gas unit and blocks the gas feeding according to a control signal. The pressure sensor is connected to the feeding pipe and measures and outputs the gas pressure. In a state the automatic blocking valve blocks the gas feeding, the control module calculates pipe capacity with reference to a memory, which stores information on the diameter and length of the feeding pipe, and the kind of gas of the feeding pipe.

Description

Residual gas detection and gas state detection apparatus in the gas tank and method

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

In particular, the present invention detects the remaining amount of the gas tank, the gas pressure regulator after the gas tank, the automatic shut-off valve, quickly and surely detect the gas leak from the gas tank to the gas mechanism, to detect minute leaks The present invention relates to a gas tank residual amount detection and gas state inspection apparatus, and a method thereof.

In general, leak inspection of gas supply pipes is based on the use of soap water or a gas leak detector.

However, in the case of soapy water, minute leaks such as the back of the gas supply pipe may not be found. In addition, in the case of gas leak detectors, maintenance costs may be incurred in the apparatus main body and the filter.

In addition, the supply pipe from the gas tank to the indoor chamber is often buried in the wall, and it is difficult to identify the leak point.

In addition, there is a method of closing the valve of the gas tank and looking at the pressure drop.However, it takes several hours to detect minute leaks, and since the piping capacity from the gas tank to the gas switchgear is large, the detection leak amount is accurate. Lack of this.

In the method and apparatus as described above, it was not satisfactory in view of quickly and reliably detecting a gas leak in the gas supply pipe after the gas tank.

In order to solve the above problems, the gas tank residual amount detection and gas state inspection apparatus for measuring the gas pressure change to determine the remaining gas amount or to determine whether the gas leaks, the use of the gas appliance, And a method thereof.

The present invention as described above is installed in the supply pipe of the gas tank and the gas mechanism, the shut-off valve for blocking the gas supply in accordance with the control signal; A pressure sensor connected to the supply pipe and measuring and outputting gas pressure; And a memory configured to receive and store 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 auto shutoff valve transmits a closing control signal to block the gas supply. The control module calculates the pipe capacity with reference to and calculates the expected pressure change in case of gas leakage and compares the calculated pressure change with the change in the pressure value input from the pressure sensor. Characterized in that the made up.

In addition, the present invention is characterized in that it further comprises a gas pressure regulator for adjusting the gas pressure installed in the supply pipe for high pressure of the gas tank.

The present invention further includes a high pressure pressure sensor installed in the high pressure supply pipe of the gas tank to measure gas pressure, and the control module includes a high pressure in a state in which a tank control valve is open and the automatic shutoff valve is closed. According to the pressure value input from the pressure sensor for characterized in that the gas remaining amount to inform the user.

The present invention further includes a temperature sensor for measuring the ambient temperature of the gas tank and the high-pressure supply pipe, and the control module corrects the gas remaining amount detected according to the temperature input from the temperature sensor. It is characterized by informing the user.

The present invention may further include a high pressure pressure sensor installed in the high pressure supply pipe of the gas tank to measure gas pressure, and the control module provides a closing control signal to the auto shutoff valve in a state in which the tank control valve is closed. To transmit and close the shut-off valve, and receive and store the information of the diameter and length of the high pressure supply pipe and the type of gas supplied to the high pressure supply pipe in advance in the provided memory, and store the gas from the pipe capacity according to the stored information. After calculating the expected pressure change in the case of leakage, the calculated pressure change is compared with the change in the pressure value input from the pressure sensor to identify the gas leakage of the supply pipe for high pressure, characterized in that to inform the user.

In addition, the supply pipe of the present invention is branched into a plurality of supply pipes are provided with a gas mechanism in each supply pipe, each branched supply pipe is installed after the gas intermediate valve to automatically shut off the gas or automatically shut off the gas A pressure sensor for detecting a supply pipe pressure between the auto shut-off valve and the gas shut-off valve and the gas appliance, and detecting a change in pressure detected by the pressure sensor, based on the change in pressure. And a gas leak inspection module including a control module for determining a gas leak.

In addition, the present invention includes the steps of (a) the control module to block the gas supply by transmitting a closed control signal to the shut-off valve installed in the supply pipe of the gas tank and gas mechanism; (b) measuring and outputting gas pressure by a pressure sensor connected to a supply pipe; And (c) calculating the pipe capacity by referring to a memory in which the control module receives and stores information on the diameter and length of the supply pipe and information on the type of gas supplied to the supply pipe in advance, and the pressure expected when the gas leaks. And calculating the change in pressure and comparing the calculated change in pressure with the change in the pressure value input from the pressure sensor to determine a gas leak in the supply pipe.

In addition, the present invention comprises the steps of (d) a high pressure pressure sensor installed in the high pressure supply pipe of the gas tank in a state in which the tank control valve is open and the automatic shut-off valve is closed; (e) determining, by the control module, a gas remaining amount according to the pressure value input from the high pressure pressure sensor; (f) measuring and outputting a temperature by a temperature sensor measuring an ambient temperature of the gas tank and the high pressure supply pipe; (g) the control module correcting the gas remaining amount determined according to the temperature input from the temperature sensor; And (h) informing the user of the determined remaining amount.

In addition, the present invention (i) the control module is a step for transmitting the closing control signal to the vehicle shut-off valve in the state in which the tank control valve is closed to close the shut-off valve; (j) measuring and outputting the pressure by a high pressure pressure sensor connected to the high pressure supply pipe; (k) calculating, by the control module, the pipe capacity according to the stored information of the memory, which has previously received and stored information on the diameter and length of the high pressure supply pipe and the type of gas supplied to the high pressure supply pipe; And (l) the control module calculates an expected pressure change amount when the gas leaks with reference to the calculated piping capacity, and compares the calculated pressure change amount with a change in the pressure value input from the pressure sensor for the high pressure supply pipe. Characterized by including the steps of identifying the leak and notifying the user.

According to the present invention, it is possible to easily find and cope with a leak caused by the initial installation work from the gas supply pipe after the gas tank or a micro leak due to aging deterioration, and the effect of preventing the leak of gas due to poor construction in advance have.

In addition, according to the present invention, by detecting the pressure in the gas tank at all times with a high pressure pressure sensor, there is an effect that it is possible to know the replacement time of the gas tank.

In addition, according to the present invention, since the automatic shutoff valve is provided between the supply pipes, the supply pipe pressure can be prevented from expanding due to the change in temperature, and the high pressure can be prevented. Prevent fire accidents from soaring flames.

Hereinafter, a gas tank residual amount detection and gas state inspection apparatus and a method thereof according to an embodiment of the present invention will be described in detail with reference to the drawings below.

1 is a block diagram of a gas tank residual amount detection and gas state inspection apparatus according to an embodiment of the present invention.

Referring to Figure 1, the gas tank residual amount detection and gas state inspection apparatus 13 according to an embodiment of the present invention, the tank control valve (2) is installed at the outlet of the gas tank 1 to regulate the supply of gas And a shut-off valve (5) provided between the high pressure pressure sensor (4), the gas tank (1) and the gas pressure regulator (6) to regulate the gas supply by the control of the control module (8), The pressure regulator 6, the pressure sensor 7, the control module 8, and the temperature sensor 9 which measures and outputs the ambient temperature of the gas state inspection apparatus 13 are included.

The gas intermediate valve 11 is installed in the supply pipe 10 between the gas state inspection 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. It is adjustable.

Here, 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, and causes the control module 8 to The gas remaining amount of the gas tank 1 according to the measured pressure value is identified and the user is notified of the gas remaining amount, or the control module 8 identifies the change in the measured pressure value to supply the high pressure supply pipe 3. After determining whether the gas has leaked, notify the user of the gas leak.

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 adjusted by adjusting the pressure of the gas supplied from the gas tank 1 according to the user's operation. The gas pressure causes the gas to be supplied to the supply pipe 10.

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

Next, the control module 8 receives the pressure value measured by the high pressure pressure sensor 4, grasps the gas remaining amount of the gas tank 1 according to the measured pressure value, and informs the user of the gas remaining amount.

At this time, the control module 8 is connected to the gas tank 1 according to the temperature of the gas tank 1 or the high pressure pressure pipe 3 with the tank control valve 2 open and the automatic shutoff valve 5 closed. When the same gas remains, the pressure value measured by the pressure sensor 4 for high pressure may be different, and after correcting the pressure value with reference to the temperature measured by the temperature sensor 9, the gas residual amount is corrected using the corrected pressure value. After the determination, the measured result is notified to the user. (Of course, the control module 8 corrects the pressure value measured by the pressure sensor 4 for high pressure using the temperature measured by the temperature sensor 9. After calculating the gas residual amount according to the pressure value measured by the pressure sensor 4, the calculated gas residual amount is corrected by using the temperature measured by the temperature sensor, and if the corrected gas residual amount is lower than the reference value, the user is informed of this state. Inform Can be implemented).

In addition, the control module 8 supplies the high pressure gas when the pressure value measured by the high pressure pressure sensor 4 decreases over time when the tank control valve 2 and the shutoff valve 5 are closed. Since there is a possibility of minute gas leakage from the pipe 3, information such as the diameter and length of the high pressure supply pipe 3 and the kind of gas supplied to the high pressure supply pipe 3 is input to the control module 8 in advance. After receiving and storing it in a memory (not shown) and determining the piping capacity accordingly, the pressure change amount calculated after calculating the expected pressure change (pressure change amount / time required) for the gas leakage according to the determined pipe capacity is used as the pressure for high pressure. It is determined whether the amount of change in the pressure value input from the sensor 4 is satisfied, and after checking whether or not the gas leaks, the user is notified whether the detected gas leaks.

In addition, the control module 8 supplies the supply pipe 10 only when the gas intermediate valve 11 connected to the supply pipe 10 is closed or the button of the gas appliance 12 is closed after the shutoff valve 5 is closed. Pressure change from the pressure sensor (7) to the supply pipe (10)

If the pressure decreases, there is a possibility of gas leakage in the supply pipe 10. Therefore, the control module 8 preliminarily informs the control module 8 of the diameter and length of the supply pipe 10 and the type of gas supplied to the supply pipe 10. After inputting to and storing in the memory (not shown) and determining the pipe capacity accordingly, the pressure change amount calculated after calculating the expected pressure change (pressure change amount / time required) when the gas leakage according to the determined pipe capacity It is determined whether the amount of change in the pressure value input from the sensor 7 is satisfied, and after checking whether or not the gas leaks, the user is notified whether the detected gas leaks.

In addition, the control module 8 receives the pressure measurement value input from the pressure sensor 7 to determine whether the gas mechanism 12 is used or whether the gas is ignited to open or close the shut-off valve 5.

The control module 8 also stores the combustion time of the gas appliance 12 in the memory, and stores information such as the number of opening and closing of the automatic shutoff valve 5 in the memory.

That is, the control module 8 accumulates and stores the combustion time in the memory when it is determined that the gas mechanism 12 continues combustion after the gas leakage inspection is completed, and performs the opening / closing operation to the shut-off valve 5. Each time the number of times is counted to store the counted number of opening and closing of the shut-off valve 5 in the memory.

In this way, if the control module 8 can grasp the approximate combustion time and the number of opening and closing of the automatic shut-off valve 5, for example, the combustion time is longer than a predetermined time or the number of opening and closing of the automatic shut-off valve 5 is constant. If the above number is recovered, the user can be informed that the product needs repair or replacement.

2 is a configuration diagram of the gas tank residual amount detection and gas state inspection apparatus according to another embodiment of the present invention, the difference from FIG. 1 is that the shut-off valve 5 is located behind the gas pressure regulator 6 And other configurations are the same.

In addition, the operation of the gas tank residual amount detection and gas state inspection apparatus according to another embodiment of FIG. 2 is the same as the gas tank residual amount detection and gas state inspection apparatus according to the embodiment of FIG. 1.

3 is a configuration diagram of a gas tank remaining amount detection and gas state inspection apparatus according to another embodiment of the present invention, which 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 pipe 10, and there is a gas leak between each gas intermediate valve 14 and the gas appliance 12, or the use of the gas appliance 12. In order to individually determine whether the gas leakage inspection module 14 that can catch the gas leak in the supply pipe between each gas intermediate valve 14 and the gas appliance 12 is provided.

Here, the gas leak inspection module 14 is composed of a pressure sensor (not shown), a control unit (not shown), and a shut-off valve (not shown), the gas intermediate valve 14 and the gas mechanism 12 By measuring the pressure change therebetween to determine whether there is a gas leak in the supply pipe, it is possible to determine whether the opening and closing of the gas appliance 12.

The gas leak inspection module 14 detects that there is an increase in pressure in the supply pipe between the gas intermediate valve 14 and the gas appliance 12, and the gas leaks from the gas intermediate valve 14 due to abrasion or the like, and the result is displayed. If the pressure decreases, the gas is identified as leaking from the supply pipe between the gas intermediate valve 14 and the gas appliance 12 to inform the user of the result.

In addition, the gas leak inspection module 14 maintains a constant value while the pressure value measured by the provided pressure sensor is lowered, and when the shaking component is repeatedly detected. Opening the shut-off valve provided by determination, maintaining a constant value and increasing, and closing the shut-off valve by judging by the fire extinguishing operation of the gas appliance 12 when a fluctuating component that increases or decreases the pressure value is detected. .

4 is a configuration diagram of the gas tank remaining amount detection and gas state inspection apparatus according to another embodiment of the present invention, the difference from FIG. 1 is that the gas pressure regulator 6 is not included in the gas state inspection apparatus And other structures are the same.

And, the operation of the gas tank residual amount detection and gas state inspection apparatus according to another embodiment of the present invention of Figure 4 is the same as the gas tank residual amount detection and gas state inspection apparatus according to one embodiment of Figure 1.

As such, if the gas state inspection apparatus is configured not to include the gas pressure regulator 6, the cost can be reduced and the manufacturing can be made relatively small.

Now, the operation of the gas tank residual amount detection and gas state inspection apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings below.

＜ Inspect gas leak between gas tank and auto shut off valve ＞

Here, the gas leak test means to check whether the gas leaks from the high-pressure supply pipe (3).

First, referring to FIG. 5, after filling the gas for the high pressure supply pipe 3 in advance, the tank control valve 2 is closed (S108), and the control module 8 is closed by the shut-off valve 5. By transmitting (S110), the shut-off valve 5 is closed (S112).

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

At this time, the control module 8 observes the pressure change, and as a result of the abnormality in the supply pipe 3 for high pressure, gas is leaked finely, and thus the pressure measured by the pressure sensor 4 for high pressure is over time. If it gradually decreases accordingly, it is determined that the gas leaks from the supply pipe for high pressure by calculating the drop amount and the drop time of the pressure (S118), and notify the user of the result (S120).

That is, the control module 8 calculates the drop amount ΔP and the drop time T of the pressure of the gas tank 1 when the measured pressure gradually decreases over time as shown in FIG. 6. It is determined that gas leaks between the tank control valve 2 and the shutoff valve 5.

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

<Gas Leakage Inspection of Automotive Shutoff Valves and Gas Appliances (Gas Intermediate Valves)>

Here, the gas leak test means to check whether the gas leaks from the supply pipe (10).

First, referring to FIG. 7, when the gas appliance 12 is not in use, the control module 8 transmits a closing control signal to the shutoff valve 5 (S210) to close the shutoff valve 5. (S212).

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

At this time, the control module 8 observes the pressure change, and as a result, there is an abnormality in the supply pipe 10 so that the gas is minutely leaked, so that the pressure measured by the pressure sensor 7 gradually decreases over time. When it is determined that the amount of pressure drop and the fall time it is determined that the gas leaks from the supply pipe 10 (S220), the result is notified to the user (S222).

That is, the control module 8 calculates the amount of pressure drop ΔP and the drop time T when the measured pressure gradually decreases as time passes, as shown in FIG. 8. It is determined that the gas leaks between the gas mechanism 12 and the gas appliance 12.

On the contrary, when the pressure change is observed in the supply pipe as a result of observing the pressure change, the control module 8 determines between the shutoff valve 5 and the gas mechanism 12 as normal (S224), and returns the result to the user. Notify (S226).

On the other hand, in the above, the gas leak between the shut-off valve 5 and the gas mechanism 12 was inspected, but if the gas leak is checked in the same manner as above while the gas intermediate valve 11 is closed, the shut-off valve 5 ) And the gas intermediate valve 11 can be inspected for gas leakage.

<Gas residual quantity inspection>

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

First, referring to FIG. 9, the control module 8 transmits a closing control signal to the shutoff valve 5 (S310) to close the shutoff valve 5 (S312).

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

Subsequently, 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 it is determined that the current pressure is higher than the reference pressure, monitoring is continued.

As a result of the determination, if the current pressure is less than the reference pressure, the duration is measured by a timer or the like provided (S322), and it is determined whether the measured duration is longer than a predetermined time (S324).

As a result of the determination, if it is not over a certain time, monitoring is continued. Since the gas needs to be refilled or exchanged, the user is notified of such a state (that is, the amount of gas remaining is notified) (S326), and the process is terminated.

Meanwhile, in the above, the pressure value measured by the high pressure pressure sensor 4 is corrected by using the temperature measured by the temperature sensor 9. However, the gas remaining amount according to the pressure value measured by the high pressure pressure sensor 4 is differently adjusted. After the calculation, the calculated gas residual amount may be corrected by using the temperature measured by the temperature sensor, and if the corrected gas residual amount is less than the reference value, the user may be notified of such a state.

<Gas appliance usage inspection>

Here, the gas appliance use inspection means an operation of automatically opening and closing the shutoff valve 5 in response to the operation when the gas user operates the gas open / close button to use or stop the gas appliance. That is, when the user wants to use the gas and opens the gas open / close button, the gas is automatically opened by opening the shutoff valve, and when the user closes the gas open / close button to stop using the gas, the shutoff valve is automatically closed. To shut off the gas supply.

Therefore, according to the present invention, since only the use of the gas is opened and not in use is automatically locked, so that the user must open and close the intermediate valve every day.

It can reduce the inconvenience, it is not necessary to close the gas switch when going to bed or going out, it can be utilized as a very useful means as an earthquake countermeasure.

In this invention, it can be said that the determination of the ignition, the extinguishing operation of the gas appliance is very important. In the present invention, the determination of the ignition / extinguishing is not the direct ignition signal of the gas equipment, but the main feature that can be determined independently by the pressure change of the gas supply pipe, in the present invention such determination and opening and closing of the shut-off valve The operation is made by the following technical configuration and process.

First, when the pressure at the inlet side of the shutoff valve 5 is P1 and the pressure at the outlet side is P2, when there is no gas leak between the shutoff valve 5 and the gas open / close button, the pressure of P2 is at the inlet side. It is equal to the virtual pressure of the pressure P1. At this time, when the user opens the gas opening and closing button, as shown in FIG. 10, P2 drops sharply from the stable state and swings for a while and maintains a stable pressure at the same time as ignition. One measurement data for this phenomenon is shown in FIG.

The present invention focuses on the phenomenon in which the pressure drops sharply during ignition and judges it as an ignition signal. Specifically, the automobile shutoff valve is opened when the following three conditions are satisfied. (The signs under the following conditions use the same signs as the signs shown in FIG. 10)

1. The pressure difference ΔP1 should occur when comparing P21 with the shut-off valve closed and P21 stored in memory a few seconds before the present time.

2. After the pressure difference ΔP1 occurs, the pressure P22 becomes stable, and there is a pressure difference ΔP2 when compared with P22 and P21 (a few seconds earlier).

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

The comparison operation, determination, and operation signal generation for the shut-off valve 5 are performed by the control module 8, and the control module may be implemented by configuring a circuit using a microcomputer chip.

However, there is no guarantee that the gas user is on fire only by pressing the opening / closing button (successful ignition). Therefore, it is necessary to determine whether the gas range is on fire. In this method, the shut-off valve can be closed for a very short time (a few milliseconds) to determine whether the ignition is successful based on the pressure change at this time. That is, when there is a fire, when the shut-off valve is closed, the gas pressure is lowered, so that the combustion is continued by opening the shut-off valve again. On the other hand, if there is no fire, the gas pressure does not change. In this case, the ignition failure is considered and the shutoff valve is kept closed.

On the other hand, even when the gas user stops using the gas by pressing the opening and closing button, the control module opens the shut-off valve for a very short time, if the pressure value of the pressure sensor does not change when the opening is so The control module keeps the shut-off valve closed because it is reconfirmed to be correct.

On the other hand, even when the gas user stops using the gas by pressing the opening and closing button, the control module opens the shut-off valve for a very short time, if the pressure value of the pressure sensor does not change when the opening is so The control module keeps the shut-off valve closed because it is reconfirmed to be correct.

Next, when the gas user closes the gas opening and closing button, the pressure detected from the pressure sensor rapidly rises from the stable state as shown in FIG. Therefore, the condition for closing the shutoff valve is specifically

The following three conditions are satisfied.

1. The pressure difference ΔP3 should occur when comparing the pressure value P22 with the shut-off valve open and the memory P22 memorized a few seconds before the present time.

2. After the pressure difference ΔP3 occurs, the pressure P23 becomes stable, and there is a pressure difference ΔP4 when compared with P23 and P22 (a few seconds earlier).

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

Further, according to the present invention as described above, when the gas is not in use, the shut-off valve remains closed, but if there is a gas leak in the gas supply pipe after the shut-off valve outlet side (actually, to some extent within the gas range itself) There is a leak.) The gas pressure is gradually lowered. If the pressure in the piping causes the pressure in the pipe to fall below the minimum pressure required for the operation of the gas range (which usually happens when it has not been used for a long time), it will not ignite when the user presses the gas switch. do. In order to prevent such a case, the present invention controls to open the shut-off valve for a very short time when the pressure value detected by the pressure sensor falls below a predetermined reference pressure value when the gas machine is not in use and closes when the gas pressure returns. . However, if the above-mentioned opening and closing times exceed the set number of times, it may be considered that there is a problem in the gas supply pipe itself.

On the other hand, in the present invention, opening the shut-off valve as described above to restore the pressure is also for triggering an alarm, but more importantly, when the gas pressure is lower than the gas supply lower limit without returning as described above, This is to prevent this because there is no guarantee of safe ignition. In addition, when the pressure becomes 0, the logic (contrast) cannot be detected in the present invention in determining whether to ignite / fire extinguish, which leads to a logic contradiction. Therefore, in the present invention, the expression "return gas pressure" has two purposes: to detect displacement (fluctuation) and to trigger an alarm and to enable reliable ignition.

1 is a block diagram of a gas tank residual amount detection and gas state inspection apparatus according to an embodiment of the present invention.

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

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

Figure 4 is a block diagram of a gas tank residual amount detection and gas state inspection apparatus according to another embodiment of the present invention.

5 is a flow chart illustrating a leak inspection process of the supply pipe for high pressure of the gas tank residual amount detection and gas state inspection apparatus according to an embodiment of the present invention.

Figure 6 is a graph showing the pressure change of the supply pipe for high pressure in Figures 1 to 4.

7 is a flow chart of a leak inspection process of the supply pipe of the gas tank residual amount detection and gas state inspection apparatus according to an embodiment of the present invention.

8 is a graph showing a change in pressure of the supply pipe in FIGS.

9 is a flowchart of a gas remaining amount inspection process of the gas tank remaining amount detection and gas state inspection apparatus according to an embodiment of the present invention;

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

11 is a graph showing an example of actual measurement data for a gas pressure change.

Description of the main parts of the drawing

1: gas tank 2: tank control valve

3: supply pipe for high pressure 4: pressure sensor for high pressure

5: car shut-off valve 6: gas pressure regulator

7: pressure sensor 8: control module

9: temperature sensor 10: supply piping

11 gas intermediate valve 12 gas mechanism

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

Claims (9)

Is installed in the supply pipe of the gas tank and the gas mechanism, the shut-off valve for shutting off the gas supply in accordance with the control signal; A pressure sensor connected to the supply pipe and measuring and outputting gas pressure; And In order to shut off the gas supply by transmitting the closing control signal to the vehicle shutoff valve, a memory is stored in advance to store and store information on the diameter and length of the supply pipe and the type of gas supplied to the supply pipe. A control module that calculates a pipe capacity by referring to the pipe capacity, calculates an expected pressure change when the gas leaks, and compares the calculated pressure change with a change in the pressure value input from the pressure sensor to determine a gas leak in the supply pipe. Gas tank remaining amount detection and gas state inspection device. In claim 1 Gas tank residual amount detection and gas state inspection apparatus further comprises a gas pressure regulator for adjusting the gas pressure installed in the high pressure supply pipe of the gas tank. In claim 1 A high pressure pressure sensor is installed in the high pressure supply pipe of the gas tank to measure gas pressure. The control module is input from the high pressure pressure sensor in a state in which a tank control valve is open and the automatic shutoff valve is closed. The gas tank residual amount detection and gas state inspection apparatus, characterized in that the gas remaining amount is detected and notified to the user according to the pressure value. In claim 3 Further comprising a temperature sensor for measuring the ambient temperature of the gas tank and the high pressure supply pipe, And the control module corrects the gas remaining amount detected according to the temperature input from the temperature sensor to inform the user of the corrected gas remaining amount. In claim 1 Further comprising a high pressure pressure sensor is installed in the high pressure supply pipe for measuring the gas pressure of the gas tank, The control module transmits a closing control signal to the auto shut-off valve in a state where the tank control valve is closed so that the shut-off valve is closed, and supplies the diameter and the length of the high pressure supply pipe to the provided memory to the supply pipe for the high pressure in advance. It receives and stores information on the gas type in advance, calculates the expected pressure change in case of gas leakage from the pipe capacity according to the stored information, and compares the calculated pressure change with the change in the pressure value input from the pressure sensor. Gas tank residual amount detection and gas condition inspection device characterized in that to inform the user to identify the gas leak in the pipe. In claim 1 The supply pipe is branched into a plurality of supply pipes, and gas appliances are installed in each supply pipe. Each branched supply pipe is installed after the gas intermediate valve to shut off the gas automatically or to automatically connect the gas, a pressure sensor for detecting the supply pipe pressure between the car shut off valve and the gas appliance; And a gas leak check module comprising a control module for detecting a change in pressure detected by the pressure sensor and determining a gas leak in the supply pipe based on the change in the pressure. And gas condition inspection device. (A) the control module to block the gas supply by transmitting a close control signal to the shut-off valve installed in the supply pipe of the gas tank and the gas appliance; (b) measuring and outputting gas pressure by a pressure sensor connected to a supply pipe; And (c) calculating the pipe capacity by referring to a memory in which the control module receives the diameter and length of the supply pipe and information on the type of gas supplied to the supply pipe in advance, and calculates the capacity of the pipe according to the gas leakage. And calculating a gas leakage amount in the supply pipe by comparing the calculated pressure change amount with the change in the pressure value inputted from the pressure sensor. In claim 7 (d) measuring and outputting the pressure by a high pressure pressure sensor installed in the high pressure supply pipe of the gas tank while the tank control valve is open and the automatic shutoff valve is closed; (e) determining, by the control module, a gas remaining amount according to the pressure value input from the high pressure pressure sensor; (f) measuring and outputting a temperature by a temperature sensor measuring an ambient temperature of the gas tank and the high pressure supply pipe; (g) the control module correcting the amount of gas remaining determined according to the temperature input from the temperature sensor; And (h) gas tank remaining detection and gas condition inspection method comprising the step of informing the user of the remaining fuel level. In claim 7 (i) the control module transmitting a close control signal to the auto shutoff valve while the tank control valve is closed to close the auto shutoff valve; (j) measuring and outputting the pressure by a high pressure pressure sensor connected to the high pressure supply pipe; (k) calculating, by the control module, the pipe capacity according to the stored information of the memory, which has previously received and stored information on the diameter and length of the high pressure supply pipe and the type of gas supplied to the high pressure supply pipe; And (l) The control module calculates the expected pressure change in case of gas leakage with reference to the calculated pipe capacity, and compares the calculated pressure change with the change in the pressure value input from the pressure sensor for high pressure, and the gas leakage of the supply pipe for high pressure. Gas tank level detection and gas condition detection method comprising the step of identifying and notifying the user.

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