CN1954348A - Gas leakage prevention system and method of using the same - Google Patents
Gas leakage prevention system and method of using the same Download PDFInfo
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- CN1954348A CN1954348A CNA2005800157736A CN200580015773A CN1954348A CN 1954348 A CN1954348 A CN 1954348A CN A2005800157736 A CNA2005800157736 A CN A2005800157736A CN 200580015773 A CN200580015773 A CN 200580015773A CN 1954348 A CN1954348 A CN 1954348A
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Abstract
A gas leakage prevention system comprises: a first judging unit for judging whether a gas appliance is ignited or not; a second judging unit for judging whether an intermediate valve installed in a passage of gas flowing into the gas appliance is open or closed; and an intermediate valve control unit for closing the intermediate valve when the first judging unit judges the gas appliance is not ignited and the second judging that unit judges the intermediate valve is open. Detecting sensors are installed in piping between the gas appliance and the intermediate valve and in piping between the intermediate valve and an external gas supply source. It is possible to provide the convenience of automatic opening and closure according to whether the gas appliance is ignited or not, and thus to reduce the risk of an accident caused by gas leakage, because the opening and closing operation is conducted.
Description
Technical field
The method that the present invention relates to a kind of gas leakage prevention system and use this system; More specifically, relate to a kind of gas leakage prevention system, this system can be owing to detect gas leakage under the situation that gas-cooker or intermediate valve lost efficacy and user's carelessness causes gas to leak and take appropriate measures, and relate to the method for using this system.
Background technology
Usually, the kitchen in family, the restaurant etc. and firing equipment use Gas appliance, for example gas-cooker, gas stove, gas fired-boiler etc., and these utensils use and act as a fuel such as gases such as LPG, LNG.
These Gas appliances are connected to the outdoor gas tank that is used for supply gas or the source of the gas of gas provider by pipeline, and between Gas appliance and the outdoor gas tank or between Gas appliance and gas supplier's source of the gas intermediate valve is being installed, thereby is being allowed the user to regulate or the cut-out source of the gas.
When needs used Gas appliance cooking food or heat rooms, the user opened intermediate valve to the Gas appliance supply gas, and used the portfire that is contained in the Gas appliance to light the gas of supply.After using Gas appliance to finish, at first close the portfire of installing in the Gas appliance to extinguish gas, close intermediate valve then to cut off source of the gas.That is,, therefore utilize to be contained in the portfire in the Gas appliance and to be contained in the double structure raising security that the intermediate valve on the gas pipeline constitutes because the leakage of the gas of Gas appliance may cause the harm such as blast or similar incidents.
But, even reducing by above-mentioned intermediate valve under the situation of gas spillage risk, be trouble owing to when using Gas appliance, open and close intermediate valve at every turn, therefore common situation is, the user only regulates source of the gas by portfire, and keeps intermediate valve to open always.
And, when Gas appliance or intermediate valve are aging, have a small amount of gas and leak, and have the danger that gas leakage accumulates in kitchen or ground, boiler room and blast.
Summary of the invention
For overcoming the problems referred to above the present invention is proposed, and an object of the present invention is to provide a kind of gas leakage prevention system, this system is by detecting the gas that leaks, all open and close portfire and intermediate valve in the time of can making the user need not to use Gas appliance at every turn, and the danger that reduces to catch fire, and provide the method for using this system.
For achieving the above object, provide a kind of according to gas leakage prevention system of the present invention, this system comprises: first judging unit is used to judge whether gas-cooker is lighted; Second judging unit is used to judge whether the intermediate valve that is contained on the gas passage that leads to gas-cooker is opened; And the intermediate valve control module, when being used at the first judgment unit judges gas-cooker that unignited and second judging unit determines that intermediate valve is opened, close intermediate valve.
In gas leakage prevention system, to light and second judging unit when determining that intermediate valve cuts out when the first judgment unit judges gas-cooker, the intermediate valve control module is opened intermediate valve.
Preferably, gas leakage prevention system also comprises flow measuring sensor, described flow measuring sensor is contained in the gas passage between gas-cooker and the intermediate valve, be used to measure the gas flow rate that flows into gas-cooker, when wherein unignited and flow measuring sensor detected gas and flows into gas-cooker when the first judgment unit judges gas-cooker, the intermediate valve control module was closed intermediate valve.
Preferably, gas leakage prevention system also comprises alarm device, is used for determining unignited and second judging unit of gas-cooker when first judging unit and determines that intermediate valve cuts out, and when flow measuring sensor detects gas and flows into gas-cooker, produces specific alarm signal.
At this moment, preferably flow measuring sensor is the heat type air flow measurement sensor that adopts MEMS (MEMS (micro electro mechanical system)).
Preferably, gas leakage prevention system also comprises: the receiving element that is connected with alarm device in being contained in a plurality of rooms respectively is used to receive the alarm signal that at least one alarm device sends; And display, be used for when receiving element is received alarm signal, showing the position in corresponding room.
According to another preferred embodiment of the present invention, first detecting sensor is contained in the gas passage between intermediate valve and the Gas appliance, and second detecting sensor is contained in the gas passage between intermediate valve and the specific gas supply source.
The result that first judging unit and second judging unit detect respectively according to first detecting sensor and second detecting sensor, perhaps, judge whether Gas appliance is lighted and whether intermediate valve is opened according to all testing results of first detecting sensor and second detecting sensor.At this moment, each first detecting sensor and second detecting sensor comprise flow measuring sensor, pressure transducer or line leak detector.The pressure measuring value that first judging unit detects according to first detecting sensor, pressure change or change in flow, judge whether Gas appliance is lighted; And second the judging unit pressure measuring value, the pressure that detect according to first detecting sensor and/or second detecting sensor change or change in flow, judge whether intermediate valve is opened.
Be higher than predetermined critical when flow measuring sensor detects flow velocity, when perhaps pressure transducer detected pressure less than predetermined critical, the intermediate valve control module was closed intermediate valve.
In addition, when the external sensor that is used for detected gas is installed in the precalculated position around the Gas appliance, and when external sensor sends gas Leak Detection signal, also can close intermediate valve.
Preferably, in gas leakage prevention system according to embodiment of the present invention, first detecting sensor and second detecting sensor are designed to pressure transducer or differential pressure pick-up, be used for detecting respectively the gas access side of intermediate valve and the pressure of gas outlet side, and the intermediate valve control module contrasts the gas access side of intermediate valve and the pressure of gas outlet side detection each other, and control intermediate valve, thereby when the pressure of gas vent side is lower than the pressure of gas access side, open intermediate valve, when the pressure reduction between gas access side and gas vent side when lighting the minimum differntial pressure of Gas appliance, close intermediate valve.
At this moment, first detecting sensor and second detecting sensor can be connected respectively to the two opposite sides of intermediate valve, and intermediate valve is designed to the unit that gas access side and gas outlet side have different-diameter.
Preferably, in gas leakage prevention system, first detecting sensor comprises the differential pressure pick-up of the pressure variation of measuring intermediate valve gas vent side, wherein the intermediate valve control module is controlled intermediate valve, thereby when the pressure of differential pressure pick-up measurement is lower than the datum pressure of gas access side, open intermediate valve, the difference of the pressure of measuring when differential pressure pick-up and the datum pressure of gas access side is closed intermediate valve when lighting the minimum differntial pressure of Gas appliance.When opening and closing by said method control intermediate valve, because the inlet gas pressure that mechanical limit causes changes, pressure reduction between minimum differntial pressure and gas access side and the gas outlet side can change, thereby the pressure reduction of gas access side and gas outlet side can be reduced to and be lower than minimum differntial pressure, and opposite with the method for closing intermediate valve.Under above-mentioned state, preferably, setting pressure regulator or pressure regulating tank in the gas passage between intermediate valve and specific gas supply source are used to regulate the pressure of the gas access side of intermediate valve, and the pressure of gas access side are remained unchanged.
Preferably, in gas leakage prevention system, first detecting sensor comprises the flow measuring sensor of measurement gas flow velocity, intermediate valve control module control intermediate valve, thereby the gas flow rate of measuring when flow measuring sensor is when lighting the minimum gas flow rate of Gas appliance, open intermediate valve, when the gas flow rate of flow measuring sensor measurement is equal to or less than the minimum gas flow rate of lighting Gas appliance, close intermediate valve.
The motor operation leverage of electric opening and closing intermediate valve can be installed on intermediate valve in addition.The intermediate valve control module opens and closes intermediate valve by drive motor operating lever device.The present invention also is applied to have the Gas appliance of conventional manual intermediate valve.
Here, thus the motor operation leverage comprises the main body that is contained on the intermediate valve, is contained on the main body and connects the lever of intermediate valve, drive the motor of the intermediate valve that connects lever and be contained in by activation lever and be used to the display unit that shows whether intermediate valve is opened on the main body.
Use may further comprise the steps according to a kind of gas leakage prevention method of gas leakage prevention system of the present invention: judge (a) whether gas-cooker is lighted; (b) judge whether the intermediate valve that is contained on the gas service duct that leads to gas-cooker is opened; And (c) when determining that in step (a) gas-cooker is unignited and when determining that intermediate valve is opened, close intermediate valve in step (b).
Preferably, the gas leakage prevention method is further comprising the steps of: (d) measure the gas flow rate that flows into Gas appliance from the service duct between gas-cooker and the intermediate valve; And, close intermediate valve (e) when determining that in step (a) gas-cooker is unignited and when step (d) determines that gas flows into gas-cooker.
Preferably, the gas leakage prevention method is further comprising the steps of: (f) when determining that in step (a) gas-cooker is unignited and when step (d) determines that gas flows into gas-cooker, produce specific alarm signal.
Preferably, the gas leakage prevention method is further comprising the steps of: (g) receive the alarm signal of sending from least one alarm device that is contained in a plurality of rooms respectively; And (h) when when receiving alarm signal, showing the position in corresponding room in step (g).
Simultaneously, pressure measuring value, pressure variation or change in flow according to first detecting sensor and/or the detection of second detecting sensor judge in step (a) whether Gas appliance is lighted, and judge according to pressure measuring value, pressure variation or the change in flow of first detecting sensor and/or the detection of second detecting sensor whether intermediate valve is opened in step (b).
According to a preferred embodiment of the present invention, the gas leakage prevention method is further comprising the steps of: whether (i) judge flow velocity in the gas service duct between intermediate valve and the Gas appliance greater than the predetermined critical flow velocity, perhaps whether pressure wherein is less than predetermined critical pressure; And (i) when definite flow velocity greater than the predetermined critical flow velocity, when perhaps determining pressure, close intermediate valve less than predetermined critical pressure.
According to another preferred embodiment of the present invention, the gas leakage prevention method is further comprising the steps of: judge (k) whether the precalculated position around Gas appliance detects gas; And (l) when in step (k), detecting gas, close intermediate valve.
Therefore, according to gas leakage prevention system of the present invention, because gas-cooker or intermediate valve lost efficacy and the user does not close the gas that leaks when gas-cooker valve or intermediate valve cause gas leakage and take appropriate measure, the accident that can prevent takes place by detecting.
Description of drawings
Fig. 1 is the block diagram that schematically shows according to an embodiment of gas leakage prevention system of the present invention;
Fig. 2 a is the planimetric map that is illustrated in an example of the heat type air flow measurement sensor of using in the gas leakage prevention system of Fig. 1; And Fig. 2 b is the cut-open view along the heat type air flow measurement sensor of the intercepting of the line A-A ' among Fig. 2 a;
Fig. 3 a is block diagram and the view that schematically shows according to another embodiment of gas leakage prevention system of the present invention to 3c;
Fig. 4 is the block diagram that schematically shows according to another embodiment of gas leakage prevention system of the present invention;
Fig. 5 is the view of an example of the display that shows on the central management system of presentation graphs 4;
Fig. 6 is the process flow diagram of the gas leakage prevention method of the expression gas leakage prevention system of using Fig. 4;
Fig. 7 a and 7b are the block diagrams of another embodiment of expression gas leakage prevention system of the present invention;
Fig. 8 to 10 represents modification embodiment of the present invention, and the motor that wherein opens and closes conventional intermediate valve is contained on the intermediate valve.
Embodiment
Describe operation below with reference to the accompanying drawings in detail according to gas leakage prevention system of the present invention.
Fig. 1 is the block diagram that schematically shows according to an embodiment of gas leakage prevention system of the present invention.Referring to Fig. 1, have gas-cooker 10, intermediate valve 20, first judging unit 30, second judging unit 40, intermediate valve control module 50 and alarm device 70 according to the gas leakage prevention system of first embodiment of the invention.In according to another implementation of the invention, can in above-mentioned gas leakage prevention system structure, increase flow measuring sensor 60.
Determines gas-cookers 10 when first judging unit 30 and do not light, and second judging unit 40 is when determining that intermediate valves 20 are opened that intermediate valve control module 50 is closed intermediate valve 20 fully, thereby cuts off the gas that is fed to gas-cooker 10.
Determines gas-cookers when first judging unit 30 and light, and second judging unit 40 is when determining that intermediate valves 20 cut out that preferably, intermediate valve control module 50 is opened intermediate valve 20, is gas-cooker 10 supply gas.In this case, when the portfire of gas-cooker 10 is opened, in particular cycle, produce the flame of lighting gas, and the temperature of flame-out protection device is owing to the flame that produces raises.When the temperature of flame-out protection device was elevated to above predetermined value, solenoid valve (not shown, as in order to distinguish with the solenoid valve as intermediate valve, it to be called " appliance valve " below) was opened.By using this principle, preferably, intermediate valve control module 50 is elevated to when opening above predetermined value or appliance valve in the temperature of flame-out protection device, opens intermediate valve.
By this method, even the user do not have the opening/closing intermediate valve when no matter when using gas-cooker 10, intermediate valve control module 50 can both by whether opening according to gas-cooker 10 opening/closing intermediate valve 20 automatically, thereby prevent that gas from leaking.
The flow measuring sensor 60 that comprises in the gas leakage prevention system 100 of the present invention is contained on the pipeline between gas-cooker 10 and the intermediate valve 20, and measures the gas flow rate that flows into gas-cooker 10.In this case, preferably, flow measuring sensor 60 is the heat type air flow measurement sensor that adopt the MEMS (MEMS (micro electro mechanical system)) of the long 6mm of wide 4mm.
But the device that is called " flow measuring sensor " among the present invention is not limited to heat type air flow measurement sensor, but can comprise a wide region device of all kinds sensor that is commonly referred to as " flowmeter " and measurement flow rate.The example that it should be understood that above-mentioned flow measurement device does not limit the scope of the invention, and the flow measuring sensor of describing with reference to figure 2a and 2b only is to be used to explain a preferred embodiment of the present invention.
Fig. 2 a is illustrated in an example of the heat type air flow measurement sensor of using in the gas leakage prevention system 100 of Fig. 1.Fig. 2 b is the cut-open view of the heat type air flow measurement sensor A-A ' along the line of Fig. 2 a.
Referring to Fig. 2 a and 2b; hot type flow measuring sensor 60 comprises the semiconductor-based end 61 of silicon or analog; constitute the electrical insulating film 69a of barrier film; upstream heating resistor 62a that on electrical insulating film 69a, forms and downstream heating resistor 62b; detect the temperature measuring resistors 63 of the temperature of heating resistor 62a and 62b; be formed on the air themperature measuring resistance 64 that substrate 61 front ends are used to detect air themperature; signal is transferred to the terminal electrode 68a of external circuit from heat type air flow measurement sensor 60; 68b; 68c; 68d; 68e; 68f and 68g are with resistance 62a; 62b; 63 and 64 and terminal electrode 68a; 68b; 68c; 68d; 68e; the line unit 67a that 68f is connected with 68g; 67b; 67c; 67d; 67e; 67f and 67g and protective resistance 62a; 62b; 63 and 64 electrical insulating film 69b.Here, resistance 62a, 62b, 63 and 64 are made by silicon (Si) semiconductive thin film of impurity, and form by heavy doping, thereby the resistivity that makes the silicon semiconductor film is less than 8 * 10
-4Ω cm.
The principle of work of the heat type air flow measurement sensor of using in gas leakage prevention system 100 according to the present invention 60 is as follows.
A pair of upstream and downstream heating resistor 62a is electrically connected with 62b and directly is connected.Joint (center tap) D is connected to terminal electrode 68 by output electrode 67f.When heating (indirect heating) electric current flow through the above-mentioned dielectric film 69a that isolate with cavity 66 heat go up form this during to heating resistor 62a and 62b, the temperature that detects the temperature measuring resistors 63 of heating resistor 62a and 62b temperature has increased predetermined value, surpasses the temperature of the air themperature measuring resistance 64 that shows air themperature.
By contrast heating resistor 62a and the temperature of 62b and the temperature detection airflow direction of temperature measuring resistors 63.That is, when not having air-flow and not showing any temperature difference, the temperature of heating resistor 62a and 62b is identical with the temperature of temperature measuring resistors 63.Simultaneously, be arranged on the heating resistor 62a of airflow direction upstream side owing to air-flow is subjected to than the big cooling effect of heating resistor 62b that is arranged on downstream direction.And because heating resistor 62a and 62b connect, the heating current that flows through is identical and produce identical heat, so the temperature of upstream heating resistor 62a is lower than the temperature of downstream heating resistor 62b.Simultaneously, when air-flow during from direction as shown changeabout direction (reverse), the temperature of downstream heating resistor 62b becomes and is lower than the temperature of upstream heating resistor 62a.Therefore, can detect airflow direction by the temperature (resistance value) of contrast heating resistor 62a and 62b.And, because the temperature of temperature measuring resistors 63 than the high predetermined value of temperature of air themperature measuring resistance 64, is therefore carried out gas flow measurement based on the heating of flowing through heating resistor 62a and 62b (indirect heating) current value.By this method, can detect airflow direction and airflow rate.And therefore, because this MEMS heat type air flow measurement sensor 60 even can detect the air-flow of trace applies it in the gas leakage prevention system 100 of the present invention, and plays the effect of the low-level gas leakage of detection.
When gas leakage prevention system 100 according to the present invention has other flow measuring sensor 60, preferably, when first judging unit 30 determines that gas-cookers 10 are unignited, and flow measuring sensor 60 is when detecting gas and flowing into gas-cooker 10, and intermediate valve control module 50 is closed intermediate valve 20.Measure the gas flow rate that flows into gas-cooker 10 with flow measuring sensor 60.
Preferably, gas leakage prevention system 100 according to the present invention has alarm device 70, when determining that at first judging unit 30 unignited and second judging unit 40 of gas-cooker 10 determines that intermediate valves 20 cut out, produces alarm sound.
Therefore, close and intermediate valve 20 when closing, can detect the gas that the wearing and tearing owing to intermediate valve 20 cause in advance and leak in the portfire of gas-cooker 10.This allows the user to take appropriate measure, for example changes intermediate valve 20.
Even sensor is unkitted externally in the pipeline, and only be contained in the internal pipeline, shown in above-mentioned embodiment, sensor also can be the pressure transducer of detected gas pressure, the perhaps detected gas line leak detector of leaking, perhaps similarly install, and above-mentioned flow measuring sensor 60.
In addition, installation site for flow measuring sensor 60, this embodiment has been embodied as sensor 60 and has been contained on the pipeline between gas-cooker 10 and the intermediate valve 20, but sensor 60 also can be contained on the pipeline between intermediate valve 20 and the gas supply source, and wherein gas supply source for example is outdoor gas tank or gas supplier's gas supply.In addition, flow measuring sensor 60 can be contained on the pipeline between gas-cooker 10 and the intermediate valve 20 and on the pipeline between intermediate valve 20 and the gas supply source simultaneously.
In addition, the invention provides a kind of when occurring gas suddenly and leak measurement flow rate and pressure and close the method for intermediate valve 20.That is,, the critical value of the flow velocity of flow measuring sensor 60 detections is set by the maximum gas volume that the gas-cooker 10 that is based upon operate as normal provides.When the flow velocity of flow measuring sensor 60 measurements surpasses critical flow velocity, can determine owing to reasons such as the damage of the pipeline between intermediate valve 20 and the gas-cooker 10, gas-cooker 10 damages cause gas to leak fast.Therefore, when the flow velocity that detects surpasses the critical value of above-mentioned setting, close intermediate valve 20.
At this moment, when working pressure sensor rather than flow measuring sensor 60, the general method of using is, based on the pressure of gas-cooker 10 operate as normal emergent pressure is set; And being defined as gas when the pressure subcritical value that detects leaks.
Fig. 3 a is framework and the view that schematically shows another embodiment of gas leakage prevention system of the present invention to 3c.In this embodiment, shown in Fig. 3 a, first detecting sensor 162 is contained on the gas passage between intermediate valve 20 and the Gas appliance (among the figure be example with the gas-cooker), second detecting sensor 161 is contained on the gas passage between intermediate valve 20 and the gas supply source, gas supply source for example is outdoor gas tank (for example, gas supplier's gas supply).At this moment, first judging unit 30 and second judging unit 40 are judged the state of lighting of Gas appliance and the state that opens or closes of intermediate valve 20 based on the testing result of first detecting sensor 162 and second detecting sensor 161 respectively.
In this embodiment, gas leakage prevention system has basic structure same as shown in Figure 1, but two detecting sensors 161 and 162 are contained in the entrance side and the outlet side of intermediate valve 20, the flow measuring sensor 60 of alternate figures 1 respectively.
Shown in Fig. 3 c, gas-cooker 10 is connected to gas supply source by pipeline 181 and 182, for example gas supplier's gas supply or outdoor gas tank.Intermediate valve 20 is contained in the halfway position of two pipelines, i.e. external pipe 181 and internal pipeline 182; And appliance valve 11 is contained in the gas access side of the gas-cooker 10 that is in internal pipeline 182 ends.
When flow measuring sensor 60 only is contained in the internal pipeline 182, as the embodiment of front, the state that opens or closes of use traffic survey sensor 60 appliance valves 11, thus, intermediate valve control module 50 opens or closes intermediate valve 20.But, when detecting sensor 161 and 162 is contained in the both sides of intermediate valve 50, can controls in the following manner and open and close intermediate valve 20.
When intermediate valve 20 and appliance valve 11 were all closed, detecting sensor 161 and 162 detected the state (perhaps pressure is higher than the state of predetermined value) that does not have pressure to change, and did not perhaps have the state of change in flow.In this state, when appliance valve 11 was opened, second detecting sensor 161 detected pressure and changes (perhaps pressure drops to the following state of predetermined value), the perhaps change in flow in the internal pipeline 182.(at this moment, when second detecting sensor 161 is pressure transducer, it will detect pressure and descend; Perhaps when second detecting sensor 161 is flow measuring sensor, it will determine flow velocity by the principle identical with the flow measuring sensor 60 of above-mentioned embodiment).
Therefore, by said procedure, first judging unit, 30 appliance valves 11 are opened, and correspondingly intermediate valve control module 50 is opened intermediate valve 20.On the other hand, can be only detect pressure and change or change in flow, and first detecting sensor 162 does not detect that any pressure changes or during change in flow, opens intermediate valve 20 simultaneously in second detecting sensor 161.
In this state, when appliance valve 11 was closed, first detecting sensor, 162 detected pressures changed (perhaps pressure is higher than the state of predetermined value) or change in flow.(at this moment, when first detecting sensor 162 was pressure transducer, it increased detected pressures or force value; Perhaps when first detecting sensor 162 is flow measuring sensor, it will determine flow velocity by the principle identical with the flow measuring sensor 60 of above-mentioned embodiment).
This as a result the time when detecting, intermediate valve control module 50 is closed intermediate valve 20.Carrying out closing of intermediate valve 20 can be according to the testing result of first detecting sensor 162, and perhaps based on the testing result of second detecting sensor 161, the perhaps all right while is according to the testing result of first detecting sensor 162 and second detecting sensor 161.
When first detecting sensor 162 and second detecting sensor 161 all are pressure transducer, also can control intermediate valve 20 as single differential pick-up (single diffrential sensor) by using these two pressure transducers.In other words, when appliance valve 11 (this moment, intermediate valve 20 and appliance valve 11 were all closed) when original state is opened, the pressure in the external pipe 181 is constant, and the pressure of internal pipeline 182 reduces.Therefore, when having pressure reduction between pipeline 181 and the pipeline 182, differential pick-up detects this pressure reduction.Therefore, intermediate valve control module 50 judgement appliance valve 11 are opened, and intermediate valve 20 cuts out, and therefore opens intermediate valve 20.And when appliance valve 11 (at this moment, intermediate valve 20 and appliance valve 11 are opened) when this state is closed, pressure will raise, and not have pressure reduction simultaneously.Therefore, two detecting sensors 161 and 162 that constitute differential pick-up detect that appliance valve 11 is closed and intermediate valve 20 is opened, so intermediate valve control module 50 is closed intermediate valve 20.
When using two detecting sensors 161 and 162 in such a way, its advantage is can more accurately control to open and close intermediate valve 20.
In this embodiment, modification as above-mentioned embodiment, the pressure that surpass the flow velocity that detects when second detecting sensor 161 critical flow velocity or second detecting sensor 161 detect is during less than emergent pressure, determine to damage or similar reason causes gas to leak fast, therefore close intermediate valve 20 owing to internal pipeline 182.
Preferably, each detecting sensor can be the flow measuring sensor of gas flow in the energy measurement pipeline, can detect the pressure transducer of pressure in the pipeline, perhaps can detect the line leak detector that pipeline gas leaks.In the present invention, flow measuring sensor, pressure transducer or line leak detector can be inserted in the pipeline, perhaps can be integrated on the pipeline, perhaps can be contained in the pipeline outside, perhaps can be designed to a unit, sensor or line leak detector are mounted in it, and have the opposite connecting pipe of direct connecting tube.When sensor or line leak detector are designed to a unit, this unit can be made into, by diameter and the length that changes opposite connecting pipe, can make this unit be more prone to check the variation of gas flow rate.
In this embodiment, two detecting sensors can be designed to two pressure transducers or two differential pressure pick-ups, perhaps a flow measuring sensor, perhaps a differential pressure pick-up, perhaps a pressure transducer.Therefore, according to one or two sensor as two detecting sensors, by gas access side A and the pressure of gas vent B detection or the opening and closing that flow velocity can control intermediate valve 20 of several different methods contrast at the intermediate valve 20 of Fig. 3 c, this will be described below.In the method below, preferably, when a sensor is used as two detecting sensors, pressure governor or pressure regulating tank are set in the gas access of intermediate valve side.
At first, when two pressure transducers or two differential pressure pick-ups during as two detecting sensors, according to two pressure transducers or two pressure comparing results that differential pressure pick-up detects, the opening and closing control of intermediate valve is as follows.That is, control the opening and closing of intermediate valve under the above-mentioned situation, will light the minimum differntial pressure P of Gas appliance
CBe predefined for initial value, thereby work as the pressure P of gas vent side B
BPressure P less than gas access side A
AThe time, i.e. P
A＞P
B, open intermediate valve; Pressure reduction P when gas access side and gas outlet side
A-P
BLess than the predetermined minimum differntial pressure P that lights Gas appliance (gas-cooker)
CThe time, i.e. P
A-P
B＜P
C, close intermediate valve.Opening the operation of intermediate valve carries out as follows: when intermediate valve was in original state or remain on its closed condition, the flow velocity of gas access side and gas vent side did not change, thereby was equal to each other at the pressure of gas access side and the measurement of gas outlet side, i.e. P
A=P
BWhen the gas-cooker of above-mentioned state was worked, the pressure of gas vent side B is instantaneous to be reduced near zero, thereby the condition P that opens intermediate valve is provided
A＞P
BTherefore, intermediate valve is opened.Under above-mentioned state, the reducing fast of above-mentioned gas outlet side pressure must be caused by the following fact: when gas-cooker is worked, gas-cooker with very high speed from gas vent side B suction air and gas.The gas velocity of gas vent side B increase fast causes reducing fast of gas vent side gaseous tension.
Secondly, when a flow measuring sensor is used as two detecting sensors, according to the flow velocity Q of intermediate valve gas vent side B
BTesting result, the control that opens and closes intermediate valve is as follows.That is, control the opening and closing of intermediate valve under the above-mentioned situation, thereby work as the flow velocity Q that gas vent side B measures
BBe equal to or higher than the predetermined minimum flow velocity Q of a cooking stove burning
CThe time, i.e. Q
B〉=Q
C, intermediate valve is opened; As flow velocity Q
BLess than predetermined minimum flow velocity Q
CThe time, i.e. Q
B＜Q
C, intermediate valve cuts out.
Opening the operation of intermediate valve carries out as follows.At the minimum flow velocity Q that will put cooking stove burning
CBe predefined under the condition of reference value, carry out the fluid-velocity survey of gas vent side and the control that opens and closes intermediate valve.When intermediate valve was in its original state or remains on its closed condition, B did not have gas flow in the gas vent side, thus the flow velocity Q that measures at gas vent side B
BNear zero.When the gas-cooker of above-mentioned state is worked, at the flow velocity Q of gas vent side B measurement
B(Q=AV, wherein Q is a rate of flow of fluid, A is the sectional area that fluid flows through pipeline, V is a fluid velocity) is owing to the gas velocity of suction gas-cooker increases.Like this, form the condition Q that opens intermediate valve
B〉=Q
CThereby, open intermediate valve.Closing the operation of intermediate valve carries out as follows.When the work of gas-cooker stops, stopping the gas supply of gas-cooker, make gas concentrate on gas-cooker position on every side gradually.Schedule time past tense after gas-cooker quits work, the flow velocity Q of gas vent side B
BBecome predetermined minimum flow velocity Q less than a cooking stove burning
C, i.e. Q
B＜Q
C, so intermediate valve cuts out.
The 3rd, when a differential pressure pick-up is used as two detecting sensors, according to use two pressure transducers or two differential pressure pick-ups as the described same way as of the example of two detecting sensors, pressure comparing result according to gas access side and the measurement of gas outlet side is predefined for critical value P with opening the gas access side of intermediate valve and the pressure reduction of gas vent side
T, and will light the minimum differntial pressure P of Gas appliance (gas-cooker)
CBe predefined for the reference value of closing intermediate valve, the opening and closing of control intermediate valve.That is, when the pressure P of gas access side A
APressure P with gas outlet side B
BDifference P
A-P
BBe equal to or greater than predetermined critical P
TThe time, i.e. P
A-P
B〉=P
T, intermediate valve is opened.But, as pressure reduction P
A-P
BBe equal to or less than the predetermined minimum differntial pressure P of a cooking stove burning
CThe time, i.e. P
A-P
B≤ P
C, close intermediate valve.
The 4th, when a pressure transducer when two detecting sensors, the pressure that the pressure transducer of installing under the condition that remains unchanged according to the pressure at gas access side A, at gas vent side B is measured changes, the control intermediate valve opens and closes.When the pressure of gas access side A remained unchanged, the flow velocity of gas vent side B did not change before gas-cooker work.Therefore, the pressure P of gas outlet side B under above-mentioned state
BKeep equaling inlet gas pressure, inlet gas pressure is the pressure P of gas access side A
A, i.e. P
A=P
BWhen the gas-cooker of above-mentioned state is worked, the pressure P of gas vent side B
BDrop to less than inlet gas pressure fast, because gas flows into gas-cooker, thereby intermediate valve is opened.Closing the operation of intermediate valve carries out as follows.When gas-cooker quits work, the pressure P of gas vent side B
BRemain inlet gas pressure, because the flow velocity of gas vent side does not change after passing by at the fixed time.Therefore, close intermediate valve.In this embodiment, can be according to pressure reduction between gas access side and the gas vent side and the predetermined minimum differntial pressure P that puts cooking stove burning
CComparing result, control intermediate valve opening and closing.In fact, the LNG of using gases supplier supply or family's inlet gas pressure of LPG are not constant, but change, thereby in the method that above-mentioned control intermediate valve opens and closes, need pressure governor or pressure regulating tank be set to keep inlet gas pressure constant in the gas access side.
As mentioned above, light the predetermined minimum differntial pressure P of Gas appliance when use
CWhen control opens and closes intermediate valve, can change minimum differntial pressure P according to multiple variable
C, for example the work franchise between the model of the diameter of unit, Gas appliance and two pressure transducers is poor.Therefore, consider that preferably above-mentioned variable determines minimum differntial pressure P
CFor example, when LNG that using gases supplier provides, minimum differntial pressure P
CCan be predefined for the numerical value of 0-30mmAg scope.
In addition, the pressure survey ability of the pressure transducer that uses in said method is preferably decided according to the gas property and the gas inlet pressure that are fed to Gas appliance.For example, when the gas access pressure that is fed to Gas appliance during in the 200-300mmAg scope, most preferably the working pressure measurement capability is the pressure transducer of 0-300mmAg.But, it should be understood that if the pressure survey ability is 0-10kg/cm
2Other pressure transducer energy measurement gaseous tension 200-300mmAg, just can use 0-10kg/cm
2Pressure transducer.
Gas leakage prevention system 100 according to the present invention can be designed to the alarm signal that alarm device 70 produces is sent to center management system 200, and an one embodiment is illustrated among Fig. 4.
Referring to accompanying drawing, center management system 200 connects the gas leakage prevention system 100 that is contained in a plurality of rooms respectively.Here, center management system 200 has alarm receiving element 210 and display 220.
Alarm signal receiving element 210 is connected to the alarm device 70 that is contained in a plurality of rooms respectively, and receives the alarm signal of sending from least one alarm device 70.
Fig. 6 is the process flow diagram that the gas leakage prevention method of gas leakage prevention system of the present invention is used in expression.Operation according to gas leakage prevention system of the present invention is described below with reference to the accompanying drawings.
First judging unit 30 of gas leakage prevention system 100 judges whether gas-cooker 10 lights (S601).Judge that by first judging unit 30 method that whether gas-cooker 10 light as mentioned above.
When first judging unit 30 determines that gas-cooker 10 is unignited (S603), the flow measuring sensor 60 that is contained on the gas pipeline between gas-cooker 10 and the intermediate valve 20 judges whether gas flows into gas-cooker 10 (S605).Heat type air flow measurement sensor is as the flow measuring sensor that detects small gas flow rate.It doesn't matter for the flow velocity size of inflow gas.
In case flow measuring sensor 60 detects the gas that flows into gas-cooker 10, then second judging unit 40 judges whether intermediate valve 20 opens (S607).
When second judging unit 40 determined that intermediate valve 20 cuts out, alarm device 70 determines because there is micro-gas leakage in the wearing and tearing of intermediate valve 20, and produces alarm signal (S611).
Thus, the user of gas leakage prevention system 100 can perceive in early days because the gas that intermediate valve 20 wearing and tearing cause leaks, thereby can take appropriate measure, for example changes intermediate valve 20 immediately, thereby prevents the fire that gas burst produces.
Gas leakage prevention system 100 according to the present invention can be connected to the caretaker room that is arranged on building that apartment, rental housing, many families family use etc.In this case, preferably, the alarm signal that alarm device 70 sends is sent to the alarm signal receiving element 210 (S613) of center management system 200.
When the alarm signal receiving element 210 of central management system 200 when being contained at least one alarm device 70 receiving alarm signal in a plurality of rooms respectively, it is sent to display 220 with the alarm signal that receives, and shows the room location (S615) of the signal that gives the alarm.
Therefore, when intermediate valve 20 is aging when causing gas to leak, the keeper of center management system 200 even under the situation that the resident in corresponding room fails to take immediate steps also can take appropriate measures, thereby prevent the fire that gas burst produces.
Do not lighted but flow measuring sensor 60 when detecting gas flow when gas-cooker 10, when second judging unit 40 judged that intermediate valves 20 are opened, intermediate valve control module 50 was closed intermediate valve 20, thereby cuts off the gas (S617) that flows into gas-cooker 10.
Therefore, when the user finishes to use gas-cooker 10 and when extinguishing gas-cooker 10, gas leakage prevention system 100 will be closed intermediate valve 20 automatically, to cut off the gas supply that flows into gas-cooker 10.
Do not lighted and flow measuring sensor 60 when determining not have gas to flow into gas-cooker 10 when gas-cooker 10, second judging unit 40 determines whether intermediate valves 20 open (S619).
When second judging unit 40 determines that intermediate valve 20 is opened (S621), intermediate valve control module 50 can be by closing the danger that intermediate valve 20 (S623) prevents that gas from leaking.When second judging unit 40 determined that intermediate valve 20 cuts out, this had confirmed a safe condition, so intermediate valve remains on closed condition (S625).
When first judging unit 30 judges that gas-cooker 10 is lighted (S603), second judging unit 40 judges whether intermediate valve 20 opens (S629).
When second judging unit 40 determines that intermediate valve 20 is opened (S631), intermediate valve control module 50 determines that the user is using gas-cooker 10, therefore keeps intermediate valve 20 to be in open mode (S625).
When definite gas-cooker 10 was lighted (S603) and intermediate valve 20 and closed (S631), intermediate valve control module 50 determined that users want to use the gas-cooker 10 and the suitable temperature of rising fire escapes, thereby opens intermediate valve 20 (S633).
Therefore, even the user does not open intermediate valve 20 when no matter when using gas-cooker 10, intermediate valve 20 is also opened automatically, thereby increases user convenience.
Fig. 7 a and 7b are the block diagrams of the other embodiment of expression gas leakage prevention system of the present invention, have wherein increased external sensor 260.In the embodiment of Fig. 7 a, gas leakage prevention system has basic structure same as shown in Figure 1, but except the external sensor that additionally provides.In the embodiment of Fig. 7 b, gas leakage prevention system has and identical basic structure shown in Fig. 3 a, but except the external sensor that additionally provides.
The external sensor 260 that additionally provides in this embodiment is contained in the precalculated position and the detected gas leakage in the room that gas-cooker 10 is installed.The type of institute's supply gas will be considered in the position of this sensor.More specifically, if the gas lta of supply, then sensor is contained in the ceiling near zone; If perhaps gas is heavier than air, then sensor is contained in the floor near zone.
The detection architecture of external sensor 260 is delivered to intermediate valve control module 50.Intermediate valve control module 50 is closed intermediate valve 20 when externally sensor 260 sends gas Leak Detection signal.Therefore, when the flame that extinguishes Gas appliance owing to the food excessive boiling caused gas to leak, intermediate valve 20 cut out to stop the gas supply.
In the above-described embodiment, though described gas-cooker, gas leakage prevention system according to the present invention is not limited to this, but can be applied to multiple Gas appliance, for example gas stove, gas fired-boiler etc.
In the present invention, " intermediate valve " directly is contained in the pipe line area that the gas service duct is provided, and solenoid valve is used to carry out automatic opening and closing operation.Except that the method, also comprise a kind of method, wherein by on the opening and closing lever of stopcock, motor being installed, and for utilizing the advantage of conventional intermediate valve (stopcock), only sensor is inserted stopcock and need not stopcock is done big change, can the manual stopcock of electric opening and closing.An embodiment of this method is illustrated among Fig. 8 to 10.
Referring to Fig. 8 to 10, conventional intermediate valve 320 is contained in as between the gas steel pipe 181 of external pipe and the rubber hose 182 as internal pipeline, and sensor 370 is contained in rubber hose 182 and intermediate valve 320 adjacent areas.Sensor 370 is carried out aforesaid function.
Intermediate valve 320 is equipped with the leverage 350 of motor operation.The leverage 350 of motor operation comprises main body 355, be contained in lever 351 on the main body 355, be contained in the main body 355 and rotatably the motor of activation lever 351 (not shown), be contained in the main body 355 and driving control unit (not shown) and the display unit 355 that forms display board, for example LCD or the similar devices of drive motor.
Place the main body 355 on the intermediate valve 320, be fixed on the intermediate valve 320 by fixed frame.In this state, lever 352 is connected to intermediate valve 320.Therefore, when the driving control unit drive motor in the main body 355, lever 351 rotates, and rotates to drive intermediate valve 320.Automatically opening and closing manual knob type intermediate valve by peripheral operation also is fine.
Display unit 352 shows intermediate valve 320 current whether opening.The display packing of this display unit 353 comprises the display packing of using character, uses image to show the method whether intermediate valve 320 is opened, or the like.And except showing whether intermediate valve 320 is opened, display unit 353 can also show the pressure that sensor 370 is measured.
When intermediate valve 320 is not during by motor direct-drive, can realize electric opening and closing on intermediate valve 320 by the leverage 350 that this motor operation is installed.Therefore, the present invention is applied to have in the conventional gas appliance of manual operation type intermediate valve easily.
According to the present invention, when causing gas to leak owing to intermediate valve is aging, because described gas leakage prevention system can real-time detected gas be leaked, therefore described gas leakage prevention system can prevent the fire that gas burst causes.
In addition,, whether use, can open or close intermediate valve automatically, thereby reduced the inconvenience of necessary opening/closing intermediate valve when the user uses at every turn according to Gas appliance according to the present invention.
Though preferred embodiment described the present invention with reference to it, it should be understood that the present invention is not limited to described embodiment or structure.On the contrary, the present invention is contained various modifications and similarly is provided with, and this is conspicuous for persons skilled in the art.Therefore, the scope of claim should be consistent with the broadest explanation, therefore comprises all such modifications and similar setting.
Claims (28)
1. gas leakage prevention system comprises:
First judging unit is used to judge whether Gas appliance is lighted;
Second judging unit is used to judge whether the intermediate valve that is contained on the gas passage that leads to Gas appliance is opened; And
The intermediate valve control module is used for closing intermediate valve when first judging unit determines that unignited and second judging unit of Gas appliance determines that intermediate valve is opened.
2. system according to claim 1 wherein, determines that Gas appliance is lighted and second judging unit when determining that intermediate valve cuts out when first judging unit, and the intermediate valve control module is opened intermediate valve.
3. system according to claim 1 and 2 also comprises:
Flow measuring sensor, described flow measuring sensor are contained on the gas passage between Gas appliance and the intermediate valve, are used to measure the gas flow rate that flows into Gas appliance, wherein
When first judging unit determined that the unignited and flow measuring sensor of Gas appliance detects gas and flows into Gas appliance, the intermediate valve control module was closed intermediate valve.
4. system according to claim 3 also comprises:
Alarm device is used for determining that Gas appliance is unignited when first judging unit, and second judging unit determines that intermediate valve cuts out, and flow measuring sensor produces specific alarm signal when detecting gas and flowing into Gas appliance.
5. system according to claim 4, wherein, described flow measuring sensor is the heat type air flow measurement sensor that adopts MEMS (micro electro mechanical system).
6. system according to claim 4 also comprises:
The receiving element that is connected with alarm device in being contained in a plurality of rooms respectively is used to receive the alarm signal that at least one alarm device sends; And
Display is used for showing the position in corresponding room when receiving element is received alarm signal.
7. system according to claim 1 and 2 also comprises:
First detecting sensor, described first detecting sensor are contained on the gas passage between intermediate valve and the Gas appliance; And second detecting sensor, described second detecting sensor is contained on the gas passage between intermediate valve and the specific gas source of supply, wherein
The result that described first judging unit and second judging unit detect respectively according to first detecting sensor and second detecting sensor, perhaps, judge whether Gas appliance is lighted and whether intermediate valve is opened according to first detecting sensor and the common result who detects of second detecting sensor.
8. system according to claim 7, wherein, each in described first detecting sensor and second detecting sensor comprises flow measuring sensor, pressure transducer or line leak detector.
9. system according to claim 8, wherein, the pressure measuring value that described first judging unit detects according to first detecting sensor, pressure change or change in flow, judge whether Gas appliance is lighted, and
The pressure measuring value that described second judging unit detects according to second detecting sensor, pressure change or change in flow, judge whether intermediate valve is opened.
10. system according to claim 8 wherein, is higher than predetermined critical when flow measuring sensor detects flow velocity, and when perhaps pressure transducer detected pressure less than predetermined critical, the intermediate valve control module was closed intermediate valve.
11. system according to claim 7, wherein, described first detecting sensor and second detecting sensor are designed to pressure transducer or differential pressure pick-up, are used for detecting respectively the gas access side of intermediate valve and the pressure of gas outlet side, and
Described intermediate valve control module contrasts the gas access side of intermediate valve and the pressure of gas outlet side detection each other, and the control intermediate valve, thereby when the pressure of gas vent side is lower than the pressure of gas access side, opens intermediate valve.
12. system according to claim 11, wherein, described intermediate valve control module control intermediate valve, thus when the pressure reduction of gas access side and gas vent side when lighting the minimum differntial pressure of Gas appliance, close intermediate valve.
13. system according to claim 11, wherein, described first detecting sensor and second detecting sensor are connected respectively to the relative both sides of intermediate valve, and intermediate valve is designed to the unit that gas access side and gas outlet side have different-diameter.
14. system according to claim 1 and 2 also comprises:
Differential pressure pick-up or pressure transducer, described differential pressure pick-up or pressure transducer are contained on the gas passage between Gas appliance and the intermediate valve, and the pressure of measuring the gas vent side of intermediate valve changes, wherein
Described intermediate valve control module control intermediate valve, thus when the pressure of differential pressure pick-up measurement is lower than the datum pressure of gas access side, open intermediate valve.
15. system according to claim 14, wherein, described intermediate valve control module control intermediate valve, thus when the difference of the datum pressure of the pressure of differential pressure pick-up measurement and gas access side when lighting the minimum differntial pressure of Gas appliance, close intermediate valve.
16. system according to claim 14 also comprises:
Pressure governor or pressure regulating tank, described pressure governor or pressure regulating tank are contained on the gas passage between intermediate valve and the specific gas source of supply, be used to regulate the pressure of the gas access side of intermediate valve, thereby the pressure of gas access side is remained unchanged.
17. system according to claim 7, wherein, described first detecting sensor comprises the flow measuring sensor of measurement gas flow velocity, and
Described intermediate valve control module control intermediate valve, thereby the gas flow rate of measuring when flow measuring sensor is when lighting the minimum gas flow rate of Gas appliance, open intermediate valve, and, when the gas flow rate of flow measuring sensor measurement is equal to or less than the minimum gas flow rate of lighting Gas appliance, close intermediate valve.
18. system according to claim 1 also comprises:
External sensor, described external sensor are contained in the precalculated position around the Gas appliance and are used for detected gas, wherein
When external sensor sends gas Leak Detection signal, close intermediate valve.
19. system according to claim 1 also comprises:
The motor operation leverage, described motor operation leverage is contained on the intermediate valve, is used for the opening and closing of electrical control intermediate valve, wherein
Described intermediate valve control module is controlled the opening and closing of intermediate valve by drive motor operating lever device.
20. system according to claim 19, wherein, described motor operation leverage comprises:
Be contained in the main body on the intermediate valve;
Be contained on the main body and be connected to the lever of intermediate valve; And
Thereby drive the motor of the intermediate valve that connects lever by activation lever.
21. system according to claim 20, wherein, described motor operation leverage also comprises being contained in and is used to the display unit that shows whether intermediate valve is opened on the main body.
22. a gas leakage prevention method may further comprise the steps:
(a) judge whether Gas appliance is lighted;
(b) judge whether the intermediate valve that is contained on the gas passage that leads to Gas appliance is opened; And
(c) when determining that in step (a) Gas appliance is unignited and when determining that intermediate valve is opened, close intermediate valve in step (b).
23. method according to claim 22 is further comprising the steps of:
(d) measure the gas flow rate that flows into Gas appliance from the gas passage between Gas appliance and the intermediate valve; And
(e) when determining that in step (a) Gas appliance is unignited and when step (d) determines that gas flows into Gas appliance, close intermediate valve.
24. method according to claim 23 is further comprising the steps of:
(f), determine that in step (b) intermediate valve cuts out, and when step (d) is measured the gas flow rate that flows into Gas appliance, produce specific alarm signal when determining that in step (a) Gas appliance is unignited.
25. method according to claim 24 is further comprising the steps of:
(g) receive the alarm signal that at least one alarm device in a plurality of alarm devices from be contained in a plurality of rooms respectively sends; And
(h) when when receiving alarm signal, showing the position in corresponding room in step (g).
26. method according to claim 25 wherein, changes or change in flow according to the pressure measuring value that detects in the gas passage between intermediate valve and Gas appliance, pressure, judges in step (a) whether Gas appliance is lighted, and
Change or change in flow according to the pressure measuring value that detects in the gas passage between intermediate valve and predetermined gas source of supply, pressure, judge in step (b) whether intermediate valve is opened.
27. method according to claim 22 is further comprising the steps of:
(i) whether judge flow velocity in the gas passage between intermediate valve and the Gas appliance greater than the predetermined critical flow velocity, judge that perhaps whether pressure in the gas passage between intermediate valve and the Gas appliance is less than predetermined critical pressure; And
(j) when definite flow velocity greater than the predetermined critical flow velocity, when perhaps determining pressure, close intermediate valve less than predetermined critical pressure.
28. method according to claim 22 is further comprising the steps of:
(k) judge whether the precalculated position around Gas appliance detects gas; And
(l) when closing intermediate valve when detecting gas in step (k).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040035518A KR20050117639A (en) | 2004-05-19 | 2004-05-19 | Gas leak prevention system and method using the same |
| KR1020040035518 | 2004-05-19 | ||
| KR1020040081471 | 2004-10-12 | ||
| KR1020050004432 | 2005-01-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1954348A true CN1954348A (en) | 2007-04-25 |
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ID=37290936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005800157736A Pending CN1954348A (en) | 2004-05-19 | 2005-03-31 | Gas leakage prevention system and method of using the same |
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| Country | Link |
|---|---|
| KR (2) | KR20050117639A (en) |
| CN (1) | CN1954348A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102542733A (en) * | 2010-12-21 | 2012-07-04 | 新奥科技发展有限公司 | Memory type hazardous gas alarm control system |
| CN104456506A (en) * | 2014-10-24 | 2015-03-25 | 中国石油天然气股份有限公司 | Steam injection boiler and explosion-proof method and device thereof |
| CN108151077A (en) * | 2017-12-21 | 2018-06-12 | 蒙城县航远信息科技有限责任公司 | A kind of gas safe prevention and control system |
| CN109141774A (en) * | 2018-08-15 | 2019-01-04 | 威海拙诚燃气安全设备有限公司 | One kind realizing gas safe management method by registering gas equipment to gas meter, flow meter |
| CN115076610A (en) * | 2022-04-19 | 2022-09-20 | 北京市燃气集团有限责任公司 | Natural gas leakage automatic cutout device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20080037753A (en) * | 2006-10-27 | 2008-05-02 | (주)금산조형연구소 | Combustion system of flame |
| KR101362239B1 (en) * | 2012-04-30 | 2014-02-13 | 린나이코리아 주식회사 | Gas shut-off method using micom mutual monitoring in boiler |
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| KR102384742B1 (en) | 2015-10-27 | 2022-04-07 | 삼성에스디에스 주식회사 | System and method for detecting anomality using sensor data |
| KR102576074B1 (en) | 2021-12-21 | 2023-09-08 | 린나이코리아 주식회사 | Apparatus and Method for Ignition Control of Gas Appliance |
-
2004
- 2004-05-19 KR KR1020040035518A patent/KR20050117639A/en active Search and Examination
- 2004-10-12 KR KR1020040081471A patent/KR20050118068A/en active Search and Examination
-
2005
- 2005-03-31 CN CNA2005800157736A patent/CN1954348A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102542733A (en) * | 2010-12-21 | 2012-07-04 | 新奥科技发展有限公司 | Memory type hazardous gas alarm control system |
| CN102542733B (en) * | 2010-12-21 | 2015-07-15 | 新奥科技发展有限公司 | Memory type hazardous gas alarm control system |
| CN104456506A (en) * | 2014-10-24 | 2015-03-25 | 中国石油天然气股份有限公司 | Steam injection boiler and explosion-proof method and device thereof |
| CN108151077A (en) * | 2017-12-21 | 2018-06-12 | 蒙城县航远信息科技有限责任公司 | A kind of gas safe prevention and control system |
| CN109141774A (en) * | 2018-08-15 | 2019-01-04 | 威海拙诚燃气安全设备有限公司 | One kind realizing gas safe management method by registering gas equipment to gas meter, flow meter |
| CN109141774B (en) * | 2018-08-15 | 2020-02-21 | 山东拙诚智能科技有限公司 | Method for realizing gas safety management by registering gas-using equipment to gas meter |
| CN115076610A (en) * | 2022-04-19 | 2022-09-20 | 北京市燃气集团有限责任公司 | Natural gas leakage automatic cutout device |
| CN115076610B (en) * | 2022-04-19 | 2023-12-15 | 北京市燃气集团有限责任公司 | Automatic cutting device for natural gas leakage |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20050117639A (en) | 2005-12-15 |
| KR20050118068A (en) | 2005-12-15 |
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