Claims:We Claim:
1. A system (100a or 100b) for operating a stove (200) fueled by a combustible gas, the stove (200) includes a burner (210), a duct (220) connected between a reservoir (230) filled with the combustible gas or a supply line (250) supplying the combustible gas and the burner (210) for supplying the combustible gas therethrough and a regulating valve (222) is arranged in the duct (220), the regulating valve (222) is having an operating knob (224), the regulating valve (222) regulates the gas flow from the duct (220) to the burner (210) according to a set position of the operating knob (224), the system (100a or 100b) characterized in that:
a control unit (10a or 10b) powered by a battery (12), the control unit (10a or 10b) is connected to the operating knob 224 for receiving signals therefrom, the signals are having information about the position of the operating knob 224;
an ignition unit (20) having a spark igniter (22), the ignition unit (20) is connected to the control unit (10a or 10b) for receiving actuation signals therefrom;
an operating valve (50) connected between the duct (220) and the supply line (250) or the reservoir (230), the operating valve (50) regulates the gas flow to the duct (220) from the supply line (250), or the reservoir (230) and the operating valve (50) is connected to the control unit (10a or 10b);
a flame sensor (30a or 30b) adapted to sense the flame of the burner (210), the flame sensor (30a or 30b) is connected to a valve actuator (32a or 32b), the valve actuator (32a or 32b) is connected to the operating valve (50), the flame sensor (30a or 30b) sends signals to the valve actuator (32a or 32b), the signals are having information about conditions of the sensed flame and the valve actuator (32a or 32b) is adapted to actuate the operating valve (50) according to the received signals from the flame sensor (30a or 30b);
wherein, when the operating knob (224) is positioned at a first position (224’), the control unit (10a or 10b) actuates the operating valve (50) to supply the combustible gas from the supply line (250) or the reservoir (230) to the duct (220), the regulating valve (222) supplies combustible gas to the burner (210) through the duct (220) and upon completion of a predefined duration of the gas flow to the burner (210), the control unit (10a or 10b) actuates the ignition unit (20) for igniting a spark from the spark igniter (22) for producing the flame by the burner (210); upon sensing the flame of the burner (210), the flame sensor (30a or 30b) is activated to send the signals to the valve actuator (32a or 32b),
wherein when the flame is at a burning condition, the valve actuator (32a or 32b) actuates the operating valve (50) to allow the gas flow from the supply line (250) or the reservoir (230) to the duct (220), and when the flame is at an extinguished condition, the valve actuator (32a or 32b) actuates the operating valve (50) to stop the gas flow from the supply line (250) or the reservoir (230) to the duct (220).

2. The system (100a or 100b) as claimed in claim 1, wherein the control unit (10a or 10b) is connected to a manual switch (14), the control unit (10a or 10b) is turned “ON” only upon switching “ON” the manual switch (14), the manual switch (14) is switched “ON” only upon applying a critical force thereon, wherein the critical force is more than the maximum capable force applied by a child.

3. The system (100a or 100b) as claimed in claim 1, wherein the control unit (10a or 10b) is a microcontroller or a microprocessor or a processor or a Field Programmable Gate Arrays (FPGAs) or an embedded circuit and the control unit (10a or 10b) is having a delay unit, or a delay circuit (16a or 16b), the delay unit or a delay circuit (16a or 16b) enables the control unit (10a or 10b) to actuate the ignition unit (20) for igniting the spark upon completion of the predefined duration of gas flow to the burner (210).
4. The system (100a) as claimed in claim 1, wherein the operating knob (224) is having a potentiometer (60a), the potentiometer (60a) is powered by the control unit (10a), the potentiometer (60a) generates voltage signals according to the position of the operating knob (224).

5. The system (100b) as claimed in claim 1, wherein the operating knob (224) is having a position sensor (60b) for sensing the position of the operating knob (224), the position sensor is connected to the control unit (10b) for sending the signals thereto.

6. The system (100a or 100b) as claimed in claim 1, wherein the operating valve (50) is a solenoid valve or a choke valve or a ball valve or a butterfly valve or a gate valve or a plug valve.

7. The system (100a or 100b) as claimed in claim 1, wherein and the flame sensor (30a or 30b) is a thermocouple or an infrared sensor or ultraviolet sensor or an Ionization current flame detection sensor.

8. The system (100a or 100b) as claimed in claim 1, wherein the spark igniter (22) is an electromechanical igniter or a pyrotechnical igniter or an electrical spark igniter.

9. The system (100a) as claimed in claims 1, 3, 4 & 6 wherein upon receiving the voltage signal from the potentiometer (60a) when the operating knob (224) is at the first position (224’), the control unit (10a) actuates the solenoid valve (50) by sending power (current) thereto for supplying the combustible gas from the supply line (250) or the reservoir (230) to the duct (220).

10. The system (100a) as claimed in claims 1 & 7, wherein when the thermocouple (30a) is exposed to the heat of the flame when the flame is at a burning condition, the electric current generated by the thermocouple (30a) is supplied to the valve actuator (32a) for actuating the operating valve (50) accordingly to allow the gas flow from the supply line (250) or the reservoir (230) to the duct (220); and when the flame is extinguished, the electric current generated by the thermocouple (30a) is stopped, thereby the supply of the electric current to the valve actuator (32a) is stopped and the valve actuator (32a) is adapted to actuate the operating valve (50) to stop the gas flow from the supply line (250) or the reservoir (230) to the duct (220) when the supply of the electric current to the valve actuator (32a) is stopped.

11. The system (100b) as claimed in claim 3, 5, 6 & 8, wherein the control unit (10b) is configured with predefined instructions, the control unit (10b) processes the received signals from the position sensor (60b) and compares the processed signals with the predefined instructions and actuates and controls the operations of the operating valve (50) and the ignition unit (20b) accordingly.

12. The system (100b) as claimed in claim 1&7, wherein the flame sensor (30b) is connected to a supplementary controller for receiving signals from the flame sensor (30b) conveying conditions of the flame of the burner (210), the supplementary controller (34b) is configured with predefined instructions and connected to the valve actuator (32b), wherein the supplementary controller (34b) processes the received signals from the flame sensor (30b) and compares the processed signals with the predefined instructions; and actuates and controls the operations of the valve actuator (32b).

13. The system (100a) as claimed in claim 1, wherein the control unit (10a) an is powered by a battery (12) and an electrical triggering circuit with a contactor is configured between the control unit (10a) and the operating knob (224), the contactor is arranged with the operating knob (224) and when the operating knob (224) is at the first position, the contactor connects with ends of the electrical triggering circuit for passing of electricity through the electrical triggering circuit for making the control unit (10a) to actuate the operating valve (50) for allowing gas flow to the duct (220).
, Description:Field of the Invention

[0001] The present invention relates to a system for operating a stove. More specifically, the present invention relates to a system for operating a stove fuelled by a combustible gas.

Background of the Invention

[0002] Stoves are used for heating and cooking purpose. The stoves are generally powered (fuelled) by electricity and combustible fuel. The stoves fuelled by combustible fuel are generally referred to as "Gas stoves".

[0003] Referring now figure 1a, 1b shows a schematic top view and front view of an existing gas stove. The stove (200) includes a burner (210), a duct (220) and a regulating valve (222). The duct (220) is connected between a reservoir (230) or a supply line (250) and the burner (210). The reservoir (230) is filled with combustible gas. The supply line (250) is for supplying the combustible gas therethrough. The duct (220) is for supplying the combustible gas therethrough to the burner (210).

[0004] The regulating valve (222) is arranged in the duct (220). The regulating valve (222) is having an operating knob (224). The operating knob (224) is accessible to a user for operating the regulating valve (222). The regulating valve (222) regulates the gas flow from the duct (220) to the burner (210). The flow of gas can be varied by varying a position of the operating knob (224). For varying the position of the operating knob (224), the user needs to apply the force accordingly on the operating knob (224) and set to the desired position.

[0005] The burner (210) is ignited by a spark, and the burner (210) produces the flame for producing heat. Sometimes, the flame is extinguished due to wind flow or spilling of milk or other liquids on the stove burner, but the fuel is being supplied continuously to the burner (210). The gas is leaked through a plurality of holes (212) of the burner (210) to the surrounding of the stove (200). This leaked gas gets accumulated in the atmosphere and can get exploded by slightest exposure to a spark or the fire. These explosions can cause economical and life losses.

[0006] There can also be gas leakages when a child operates the operating knob (224) to initiate gas flow to the burner (210) unintentionally (childishly), and the flame is not ignited at the burner (210).

[0007] To overcome these leakages, presently, there are several flame sensing systems (devices). These systems are costly.

[0008] Sometimes the supplied fuel gas is not ignited within an expected interval of a time due to the partial failure of an automatic ignition unit. These delays lead to the wastage of fuel gas. When the automatic ignition unit is permanently failed, the user needs to use an external ignition device for ignition of fuel gas until it is repaired.

[0009] Patent GB2317684A describes an ignition system of a gas heating appliance. The system has a flame sensing provision. But, the system does not have a provision for a child lock. The system requires an additional external device to ignite the flame. Patent CN105526392B describes “an integrated gas valve and gas ignition system of the magnetic control function. The system does not have a provision for a child lock. Since the child lock is not used therein the system, the safety is not ensured against gas leak due to mischief by kids playing with the system or if mistakenly the gas knob is actuated.

[0010] Therefore, there is a need for a system for operating a stove fuelled by a combustible gas to overcome problems of the prior art.

Objects of the Invention

[0011] An object of the present invention is to provide a system for operating a stove fuelled by a combustible gas.

[0012] Another object of the present invention is to provide a system for operating a stove fuelled by a combustible gas; the system enhances user comfort.

[0013] Still another object of the present invention is to provide a system for operating a stove fuelled by a combustible gas; the system provides a child lock provision.

[0014] Furthermore, the object of the present invention is to provide a system for operating a stove fuelled by a combustible gas; the system increases the safety of the user.

[0015] Yet another, object of the present invention is to provide a system for operating a stove fuelled by a combustible gas, the system reduces fire accidents.

[0016] Another object of the present invention is to provide a system for operating a stove fuelled by a combustible gas; the system reduces leakage of combustible fuel.

[0017] Further, the object of the present invention is to provide a system for operating a stove fuelled by a combustible gas; the system is simple and economical in construction.

[0018] Furthermore, the object of the present invention is to provide a system for operating a stove fuelled by a combustible gas; the system is easy in operation.

Summary of the invention

[0019] According to the present invention, there is provided with a system for operating a stove. The stove is fuelled by a combustible gas. The stove includes a burner, a duct, and a regulating valve. The system includes a control unit, an ignition unit, an operating valve and a flame sensor.

[0020] In a preferred embodiment of the system, the reservoir is filled with the combustible gas. The supply line is configured for supplying the combustible gas therethrough. The duct is connected between the reservoir or the supply line and the burner. The duct is configured for supplying the combustible gas therethrough to the burner. The regulating valve is arranged in the duct. The regulating valve is having an operating knob mounted thereon. The regulating valve regulates the fuel gas flow from the duct to the burner. The amount of fuel gas flow to the burner can be controlled according to a set position of the operating knob.

[0021] The control unit is powered by a battery. The control unit is connected to the operating knob for receiving signals therefrom. The control unit is a microcontroller or a microprocessor or a processor or a Field Programmable Gate Arrays (FPGAs) or an embedded circuit. The control unit is having a delay unit or a delay circuit. The delay unit or a delay circuit enables the control unit to actuate the ignition unit for igniting the spark.

[0022] Further, the control unit is connected to a manual switch. The control unit is turned “ON” only upon switching “ON” the manual switch. The manual switch is switched “ON” only upon applying a critical force thereon. The critical force is more than the maximum capable force applied by a child. The signals are having information about the position of the operating knob.

[0023] The ignition unit is having a spark igniter. The spark igniter is an electromechanical igniter or a pyrotechnical igniter or an electrical spark igniter. The ignition unit is connected to the control unit for receiving actuation signals therefrom. The operating valve is a solenoid valve or a choke valve or a ball valve or a butterfly valve or a gate valve or a plug valve. The operating valve is connected between the duct and the supply line or the reservoir. The operating valve regulates the fuel gas flow to the duct from the supply line or the reservoir. The operating valve is connected to the control unit.

[0024] Further, the flame sensor is adapted to sense the flame of the burner. The flame sensor is a thermocouple or an infrared sensor or an ultraviolet sensor or an Ionization current flame detection sensor. The flame sensor is connected to a valve actuator. The valve actuator is connected to the operating valve. The flame sensor sends signals to the valve actuator. The signals are having information about conditions of the sensed flame. The flame sensor is activated to the valve actuator is adapted to actuate the operating valve according to the received signals from the flame sensor.

[0025] More particularly, when the operating knob is positioned at a first position, the control unit actuates the operating valve to supply the combustible gas from the supply line or the reservoir to the duct. The regulating valve supplies combustible gas to the burner through the duct. Upon completion of a predefined duration of the gas flow to the burner, the control unit actuates the ignition unit for igniting a spark from the spark igniter. The spark is ignited for producing the flame by the burner. Upon sensing the flame of the burner, the flame sensor is activated to send the signals to the valve actuator.

[0026] When the flame is at a burning condition, the valve actuator actuates the operating valve to allow the gas flow from the supply line or the reservoir to the duct. Similarly, when the flame is at an extinguished condition, the valve actuator actuates the operating valve to stop the gas flow from the supply line or the reservoir to the duct.

[0027] In a preferred embodiment, the system is configured with analogue units. The operating knob has a potentiometer. The potentiometer is powered by the control unit. The potentiometer generates voltage signals according to the position of the operating knob. When the operating knob is in the first position, the voltage signal is received from the potentiometer. Upon receiving the voltage signal from the potentiometer, the control unit actuates the solenoid valve by sending power (current) thereto. Upon actuation, the solenoid valve supplies the combustible gas from the supply line or the reservoir to the duct.

[0028] In one more embodiment, an electrical triggering circuit with a contactor is configured between the control unit and the operating knob. The contactor is arranged with the operating knob. When the operating knob is at the first position, the contactor connects with ends of the electrical triggering circuit for passing of electricity through the electrical triggering circuit for making the control unit to actuate the operating valve for allowing gas flow to the duct.

[0029] Further, the thermocouple (flame sensor) is exposed to the heat of the flame. When the flame is at a burning condition, the electric current is generated by the thermocouple. The electric current generated by the thermocouple is supplied to the valve actuator for actuating the operating valve. The operating valve accordingly allows the gas flow from the supply line or the reservoir to the duct. When the flame is extinguished, the electric current generated by the thermocouple is stopped. Thereby supply of the electric current to the valve actuator is stopped. When the supply of the electric current to the valve actuator is stopped, the valve actuator is adapted to actuate the operating valve to stop the gas flow from the supply line or the reservoir to the duct.

[0030] In one more embodiment, the system is configured with digital units. The operating knob is having a position sensor for sensing the position of the operating knob. The position sensor is connected to the control unit for sending the signals thereto. The control unit is configured with predefined instructions. The control unit processes the received signals from the position sensor. Also, the control unit compares the processed signals with the predefined instructions. Further, the control unit actuates and controls the operations of the operating valve and the ignition unit accordingly.

[0031] The flame sensor is connected to a supplementary controller for receiving signals from the flame sensor conveying conditions of the flame of the burner. The supplementary controller is configured with predefined instructions. The supplementary controller is connected to the valve actuator. The supplementary controller processes the received signals from the flame sensor. Also, the supplementary controller compares the processed signals with the predefined instructions. Further, the supplementary controller actuates and controls the operations of the valve actuator.

Brief Description of the Drawings

[0032] The advantages and features of the present invention will be understood better with reference to the following detailed description of some embodiments of the claims taken in conjunction with the accompanying drawings, wherein like elements are identified with like symbols, and in which;

[0033] Figure 1a and 1b shows a schematic top view and a front view of an existing stove fuelled by a combustible gas (prior art);

[0034] Figure 2 shows a schematic view of a system for operating the stove shown in figure 1 in accordance with the present invention;

[0035] Figure 3 shows a schematic view of an alternative embodiment of a system for operating the stove shown in figure 1 in accordance with the present invention;

[0036] Figure 4 shows a schematic view of an alternative embodiment of a system for operating the stove shown in figure 1 in accordance with the present invention; and

[0037] Figure 5 shows a schematic view of an alternative embodiment of a system for operating the stove shown in figure 1 in accordance with the present invention.

Detailed Description of the Invention

[0038] An embodiment of this invention, illustrating its features, will now be described in detail. The words "comprising, "having, "containing," and "including," and other forms thereof, are intended to be equivalent in meaning and be open-ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items or meant to be limited to only the listed item or items.

[0039] The terms “first,” “second,” and the like, herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another, and the terms “an” and “a” herein do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item.

[0040] The disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms.
[0041] The present invention provides a system for operating a stove fuelled by a combustible gas. The system enhances user comfort. The system provides a child lock provision. Further, the system increases the safety of the user. The system reduces fire accidents. The system reduces leakage of combustible fuel. Furthermore, the system is simple and economical in construction. Also, the system is easy in operation.

[0042] Referring now to figures 2, 3, 4 & 5 various schematic views of a system for operating a stove (200) (refer figures 1a & 1b) in accordance with the present invention are illustrated. From herein afterwards, the system is referred to as a system (100a or 100b).

[0043] The stove (200) includes a burner (210), a duct (220) and a regulating valve (222). The stove (200) is fuelled by a combustible gas such as natural gas, propane, butane, liquefied petroleum gas or any other flammable gas. In a preferred embodiment of the stove (200), the reservoir (230) is filled with the pressurised combustible gas. The reservoir is configured in a cylinder shape. Generally, the reservoirs are referred to as "LPG cylinders". The supply line (250) is connected to a source of combustible gas. The supply line (250) is generally referred to as "a gas pipeline".

[0044] The duct (220) is having a first end (220’) and a second end (220’’). The duct (220) is connected to the reservoir (230) or the supply line (250) at the first end (220’). Similarly, the duct (220) is connected to the burner (210) at the second end (220’’). The duct (220) is configured for supplying the combustible gas therethrough to the burner (210). The burner (210) is having a plurality of holes (212). The combustible gas passes through the plurality of holes (212).

[0045] A regulating valve (222) is arranged in the duct (220). The regulating valve (222) regulates the fuel gas flow from the duct (220) to the burner (210). The regulating valve (222) is having an operating knob (224). The amount of fuel gas flow to the burner (210) is controlled according to a set position of the operating knob (224).

[0046] The system (100a or 100b) includes a control unit (10a or 10b), an ignition unit (20), an operating valve (50) and a flame sensor (30a or 30b).
The control unit (10a or 10b) is powered by a battery (12). The control unit (10a or 10b) is a microcontroller or a microprocessor or a processor or a Field Programmable Gate Arrays (FPGAs) or an embedded circuit. The microcontroller or the microprocessor or the processor or the Field Programmable Gate Arrays (FPGAs) or the embedded circuit includes a memory unit (11a or 11b). Also, a plurality of predefined instruction to the system (100a or 100b) and feedback data is stored in the memory unit (11a or 11b).

[0047] The control unit (10a or 10b) is connected to a manual switch (14). More specifically, the manual switch (14) can be a toggle switch or a rotary switch or a push-button switch or a reversing switch or a relay. The control unit (10a or 10b) is turned “ON” only upon switching “ON” the manual switch (14). The manual switch (14) is switched “ON” only upon applying a critical force thereon. The critical force is the force required to move an actuating element configured on the manual switch (14).

[0048] The critical force is more than the maximum capable force applied by a child. The child here refers to a child who has not yet developed logical reasoning intelligence (knowledge) about operation and consequences of gas stove and gas stove leakage. For example, if the maximum capable force which can be applied by the child is 150 Newton, then the critical force is 160 Newton. This critical force enabled manual switch (14) configures a “Child lock” provision in the system (100a or 100b).

[0049] The control unit (10a or 10b) is connected to the operating knob (224) for receiving signals therefrom. The signals are having information about the position of the operating knob (224). The ignition unit (20) is having a spark igniter (22). The spark igniter (22) is an electromechanical igniter or a pyrotechnical igniter or an electrical spark igniter. The ignition unit (20) is connected to the control unit (10a or 10b) for receiving actuation signals therefrom.

[0050] The operating valve (50) is connected between the duct (220) and the supply line (250) or the reservoir (230). The operating valve (50) is a device that regulates or directs or controls the fuel gas flow by opening or closing or partially obstructing the supply line (250) or the reservoir (230). The operating valve (50) is a solenoid valve or a choke valve or a ball valve or a butterfly valve or a gate valve or a plug valve. The operating valve (50) regulates the fuel gas flow to the duct (220) from the supply line (250) or the reservoir (230). Further, the operating valve (50) is connected to the control unit (10a or 10b).

[0051] More particularly, the flame sensor (30a or 30b) is adapted to sense the flame of the burner (210). The flame sensor (30a or 30b) is a thermocouple (30a) or an infrared sensor or ultraviolet sensor or an Ionization current flame detection sensor. The flame sensor (30a or 30b) is connected to a valve actuator (32a or 32b). The valve actuator (32a or 32b) is connected to the operating valve (50). The flame sensor (30a or 30b) sends signals to the valve actuator (32a or 32b).

[0052] The signals are having information about conditions of the sensed flame. The conditions of the flame to be measured are predefined. The conditions of sensed flame are converted into a respective equivalent electrical quantity. The electrical quantity can be a voltage or a current or resistance or any other such quantity. The signal is in an analogue form or a digital form. The valve actuator (32a or 32b) is adapted to actuate the operating valve (50) according to the received signals from the flame sensor (30a or 30b).

[0053] The fuel gas is supplied to the burner (210) when the operating knob (224) is set to a first position (224’). The first position (224') is referred to when the operating knob (224) is positioned to an operating angle (not numbered) to a reference (not shown). For example, in the shown stove (200), the operating knob (224) is positioned at five degrees to a horizontal plane. The amount of fuel gas supplied to the burner (210) can be controlled by adjusting the operating angle of the operating valve (224).

[0054] When the operating knob (224) is positioned at the first position (224’), the control unit (10a or 10b) actuates the operating valve (50) to supply the combustible gas from the supply line (250) or the reservoir (230) to the duct (220). The regulating valve (222) supplies the combustible gas to the burner (210) through the duct (220). Upon completion of a predefined duration of the gas flow to the burner (210), the control unit (10a or 10b) actuates the ignition unit (20) for igniting a spark from the spark igniter (22).

[0055] The control unit (10a or 10b) is having a delay unit or a delay circuit (16a or 16b). The delay unit or delay circuit (16a or 16b) is having a timer circuit. The delay time is set in intervals such as 5sec, 10sec, etc. using the timer circuit. The delay unit or a delay circuit (16a or 16b) enables the control unit (10a or 10b) to actuate the ignition unit (20) for igniting the spark upon completion of the set(predefined) time of gas flow. The spark is ignited for producing the flame by the burner (210). The flame sensor (210) is arranged near the burner (210) to sense the flame. Upon sensing the flame of the burner (210), the flame sensor (30a or 30b) is activated to send the signals to the valve actuator (32a or 32b).

[0056] When the flame is at a burning condition, the valve actuator (32a or 32b) actuates the operating valve (50) to allow the gas flow from the supply line (250) or the reservoir (230) to the duct (220). Similarly, when the flame is at an extinguished condition, the valve actuator (32a or 32b) actuates the operating valve (50) to stop the gas flow from the supply line (250) or the reservoir (230) to the duct (220).

[0057] In a preferred embodiment, the system (100a) (refer figure 4) is configured with analogue units. The analogue units here refer to, the units having analogue electronic circuits. The operating knob (224) of the system (100a) is having a potentiometer (60a). The potentiometer (60a) is powered by the control unit (10a). The potentiometer (60a) produces voltages according to rotational or translational motions of the operating knob (224).

[0058] When the operating knob (224) is at the first position (224’), the voltage signal is received from the potentiometer (60a). Upon receiving the voltage signal from the potentiometer (60a), the control unit (10a) actuates the solenoid valve (50) by sending power (current) thereto. Therefore, the combustible gas is supplied from the supply line (250) or the reservoir (230) to the duct (220), thereby to the burner (210). The control unit (10a) actuates the ignition unit (20) to produce the flame.

[0059] In one more embodiment, an electrical triggering circuit (not shown) with a contactor is configured between the control unit (10a) and the operating knob (224). The contactor is arranged with the operating knob (224). The contactor is an electrically-controlled switch used for switching an electrical power circuit. When the operating knob (224) is at the first position, the contactor connects with ends of the electrical triggering circuit for passing of electricity through the electrical triggering circuit for making the control unit (10a) to actuate the operating valve (50) for allowing gas flow to the duct (220).

[0060] Further, the thermocouple (30a) is exposed to the heat of the flame. Upon varying the temperature of the flame, the thermocouple (30a) experiences a thermoelectric effect. When the flame is at a burning condition, the electric current is generated by the thermocouple (30a). The electric current generated by the thermocouple (30a) is supplied to the valve actuator (32a) for actuating the operating valve (50). The operating valve (50) accordingly allows the gas flow from the supply line (250) or the reservoir (230) to the duct (220). The power supply from the control unit (10a) to the operating valve (50) is stopped as there is already a power supply from the flame sensor (30a).

[0061] Similarly, when the flame is extinguished, the electric current generated by the thermocouple (30a) is stopped. Thereby, the supply of the electric current to the valve actuator (32a) is stopped. When the supply of the electric current to the valve actuator (32a) is stopped, the valve actuator (32a) is adapted to actuate the operating valve (50) to stop the gas flow from the supply line (250) or the reservoir (230) to the duct (220).

[0062] In one more embodiment, the system (100b) (refer figure 5) is configured with digital units. The digital units here refer to the units configured with digital circuits. The operating knob (224) of the system (100b) is having (is connected to) a position sensor (60b) for sensing the position of the operating knob (224). The position sensor (60b) is a device that can detect the position of an object and generated signals accordingly. The position sensor (60b) is connected to the control unit (10b) for sending the signals thereto. The signals are in the digital form.

[0063] The control unit (10b) is configured with predefined instructions. The predefined instructions can be instructions of operations to be carried out by the control unit (10b) according to the received signals. The control unit (10b) processes the received signals from the position sensor (60b). Also, the control unit (10b) compares the processed signals with the predefined instructions. Further, the control unit (10b) actuates and controls the operations of the operating valve (50) and the ignition unit (20b) accordingly.

[0064] For example, the control unit (10b) is feed with an instruction, conveying "the control unit (10b) needs to actuate the operating valve (50) for supplying the gas to the duct (220) upon receiving a signal from the position sensor (60b) conveying that the operating knob (224) is at the first position". when the control unit (10b) receives a signal from the position sensor (60b) conveying that the operating knob (224) is at the first position, the control unit (10b) actuate the operating valve (50) for supplying the gas to the duct (220). Similarly, the control unit (10b) can be configured(fed) with instruction having relations between the position of the operating knob (224), actuation of the operating valve (50) and the ignition unit (20b).

[0065] The flame sensor (30b) of the system (100b) is connected to a supplementary controller (34b) for receiving signals from the flame sensor (30b) conveying conditions of the flame of the burner (210). The supplementary controller (34b) is configured with predefined instructions about activities carried needs to carry out by the valve actuator (32b) according to the signals received from the flame sensor (30b). The supplementary controller (34b) is connected to the valve actuator (32b). The supplementary controller (34b) processes the received signals from the flame sensor (30b). Also, the supplementary controller (34b) compares the processed signals with the predefined instructions. Further, the supplementary controller (34b) actuates and controls the operations of the valve actuator (32b).

[0066] The flame sensor (30a or 30b) independently controls gas flow to the burner (210) upon activated according to conditions of the flame. The flame sensor (30a or 30b) is not continuously instructed or controlled by the control unit (10a or 10b). The system (100a or 100b) is activated only upon switching on the manual switch (14), which is having the child lock provision. The “child lock” provision ensures safety against a gas leak when the system (100a or 100b) is mischief by a kid (child).

[0067] Therefore, the present invention provides the system (100a or 100b) for operating the stove (200) fuelled by the combustible gas. The system (100a or 100b) enhances user comfort. The system (100a or 100b) provides the child lock (14) provision. Further, the system (100a or 100b) increases the safety of the user. The system (100a or 100b) reduces fire accidents. The system (100a or 100b) reduces leakage of combustible fuel. Furthermore, the system (100a or 100b) is simple and economical in construction. Also, the system (100a or 100b) is easy in operation.

[0068] The foregoing descriptions of specific embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present invention to the precise forms disclosed, and obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described to best explain the principles of the present invention and its practical application, and to thereby enable others skilled in the art to best utilise the present invention and various embodiments with various modifications as are suited to the particular use contemplated. It is understood that various omissions and substitutions of equivalents are contemplated as circumstances may suggest or render expedient, but such omissions and substitutions are intended to cover the application or implementation without departing from the scope of the claims of the present invention.