Abstract
The invention relates to a re-ignition system for a gas device comprising an electrode element (1) provided next to a burner (2); an igniter (60) in communication with the electrode element (1) for transmitting electrical signal and providing a spark arc with high voltage towards burner (2) in electrode element (1) in ignition mode; and an ignition control unit (30). Re-ignition system further comprises at least one battery (10); a flame detection unit (50) receiving a flame presence signal (3) by flame rectification and a transformer (20) which converts the direct current supplied through the battery (10) from one inlet (22) to alternating current at an outlet (24) and is connected with the ignition control unit (30) and flame detection unit (50) to provide electrical signal.
Claims
1- A re-ignition system for a gas device comprising an electrode element (1) provided at a distance of spark gap (4) next to a burner (2); an igniter (60) in communication with the electrode element (1) for transmitting electrical signal and provides a spark arc with high voltage towards burner (2) in electrode element (1) in ignition mode; and an ignition control unit (30) driving the igniter (60) to switch an ignition mode, characterized by at least one battery (10) providing direct current; a flame detection unit (50) in which the distance of the spark gap (4) is also arranged at predefined distance to receive a flame presence signal (3) by flame rectification of the electrode element (1) and triggers the ignition control unit (30) to switch to the ignition mode when the flame presence signal (3) is interrupted and a transformer (20) converts the direct current supplied by the battery (10) from one inlet (22) to alternating current at the outlets (24, 25) and is connected with the ignition control unit (30) and flame detection unit (50) to feed electrical signal.
2- A re-ignition system according to claim 1, wherein the transformer (20) is configured such that the alternating current provided at the outlet (24) is set to a frequency between 0.5-5 kHz, particularly 1-3 kHz.
3- A re-ignition system according to any one of the preceding claims, wherein the transformer (20) is configured such that the alternating current provided at the outlet (24) is set to a voltage between 100-400 volts.
4- A re-ignition system according to any one of the preceding claims, wherein the spark gap (4) is arranged between 0.1-1 cm.
5- A re-ignition system according to any one of the preceding claims, wherein a ceramic isolator (6) is wrapped around the electrode element (1).
6- A re-ignition system according to any one of the preceding claims, wherein a direct current converter (40) is provided between direct flame detection unit (50) and transformer (20).
7- A re-ignition system according to any one of the preceding claims, wherein the transformer (20) includes a module coupled with oscillator.
8- A re-ignition system according to any one of the preceding claims, wherein it comprises a parallel connection feeding the alternating current to the flame detection unit (50) from the outlet (24) of the transformer (20) and to the ignition control unit (30) from the outlet (25).
9- A re-ignition system according to any one of the preceding claims, wherein the ignition detection unit (50) includes a first outlet (52) connected to the ignition control unit (30) to transmit electrical signal and a second outlet (54) connected to the igniter (60) to feed alternating current.
10-A gas cooker comprising a re-ignition system according to any one of the preceding claims.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] FIG. 1 is electrical diagram view of a representative embodiment of the re-ignition system fed with direct current that detects the flame with alternative current in ignition position according to the invention.
[0017] FIG. 2 is electrical diagram view of an application with two transformers of the re-ignition system fed with direct current that detects the flame with alternative current in ignition position according to the invention.
[0018] FIG. 3 is electrical diagram view of an embodiment of the re-ignition system fed with direct current that detects the flame with direct current according to the invention.
[0019] FIG. 4 is electrical diagram view of a representative embodiment of the re-ignition system fed with direct current that detects the flame with alternative current and has the property of power efficiency in ignition position according to the invention.
[0020] FIG. 5 is electrical diagram view of an application with two transformers of the re-ignition system fed with direct current that detects the flame with alternative current and has the property of power efficiency in ignition position according to the invention.
[0021] FIG. 6 is electrical diagram view of an embodiment of the re-ignition system fed with direct current that detects the flame with direct current and has the property of power efficiency according to the invention.
[0022] FIG. 7 is electrical diagram view of a representative embodiment of the re-ignition system fed with direct current that detects the flame with alternative current and has the property of power efficiency, showing that it is operated via mains voltage in ignition position according to the invention.
[0023] FIG. 8 is electrical diagram view of an application with two transformers of the re-ignition system fed with direct current that detects the flame with alternative current and has the property of power efficiency, showing that it is operated via mains voltage in ignition position according to the invention.
DETAILED DESCRIPTION OF THE INVENTION
[0024] In this detailed description, the development of the invention has been described without any limitation and only with reference to the examples for a better explanation of the subject.
[0025] FIG. 1 shows the electrical diagram of a representative embodiment of a compact re-ignition system used in a recreational device. A burner (2) producing a gas-air mixture from the ambient air by a gas supply (not shown) is located in the cooking part of the recreational device. An electrode element (1) is secured vertically to leave a space at the distance of the burner (2) and a spark gap (4). The spark gap (4) is arranged to be between 0.1-1 cm. The feed line (5) of a cable structure transmits high voltage to the electrode element (1). The high voltage is provided from a igniter (60) connected with a feed line to the electrode element (1). The igniter (60) consists of a coil having a first winding wound around an iron core and a second winding (not shown) spaced therefrom. Such igniter (60) is disclosed in PCT publication incorporated herein with reference to WO2019TR050825.
[0026] A battery (10) supplies current to the circuit by being placed into a chamber (not shown) to provide 3 volts of direct current. In the application shown in FIG. 1, the battery (10) is connected directly to the transformer (20) through an inlet (22) from its plus and minus poles such that it transmits direct current. The inlet (22) has the transmission path structure formed on a printed circuit board (not shown) to which the electronic components of the entire re-ignition system are secured. Transformer (20) is coupled with the oscillator and arranged to increase the 3 volts of direct current provided by the battery (10) to an alternating current at a frequency between 0.5-5 kHz and a value of 100-400 volts at an outlet (24). The transformer (20) has two parallel alternating current outlets. One (25) of these supplies alternating current to an ignition control unit (30). The other one (24) provides alternating current from a first inlet (56) to a flame detection unit (50) in parallel connection with the ignition control unit (30). In the embodiment shown in FIG. 2, the transformer (20) is in two independent units and one (25) of these units is connected to the ignition control unit (30) and the other one (24) to the flame detection unit (50). Flame detection unit (50) is operated by the flame rectification phenomenon. In this structure, a cable (7) connected to the flame detection unit (50) from one end to the burner (2) carries a flame presence signal (3). The circuit in which the flame presence signal is generated, is the electrode element (1) to which electrical signal is transmitted via feed line (5) through igniter (60) from the second outlet (54) of the flame detection unit (50), the flame extending along the spark gap (4) and the cable (7) which is connected to this with burner (2) and turns back to the flame detection unit (50) from the second inlet (58). When the flame presence signal (3) is discontinued in the circuit, the flame detection unit (50) ensures that the alternating current, which supplied from the outlet (25) by transmitting electrical signal to the ignition control unit (30) from the first outlet (52), is transmitted to the igniter (60). In this case, by creating a sparkover of arc from the spark gap (4) to the burner (2) by high voltage created in the igniter (60), the air-flammable gas mixture provided by the burner (2) ignites again.
[0027] When the flame is present over the burner (2), the flame allows current to flow between the burner (2) and the electrode element (1). However, when the current fed through the burner (2) reaches the electrode element (1), the flame provides partial rectification of the alternating current by acting as a current. This is called flame rectification. The flame detection unit (50) continuously monitors the partially rectified alternating current in the circuit completed by the flame extending along the burner (2), the electrode element (1) and the spark gap (4) therebetween. When the flame is interrupted by wind or any other external factor, the circuit is closed when the alternating current returns to normal and the presence signal (3) of the flame is interrupted. Thereby, the trigger signal for switching from flame detection unit (50) to ignition mode is transmitted to the ignition control unit (30) via the first outlet (52). The ignition control unit (30) switching into the ignition mode, transmits the alternating current from the outlet (25) of the transformer (20) to the igniter (60). When the re-ignition system re-ignites the air-flammable gas mixture supplied from the burner (2) by turning on the igniter (60), the flame detection unit (50) detects the flame presence signal (3) again with flame rectification and transmits a signal from the first outlet (52) of the ignition control unit (30) to exit the ignition mode. In this case, the ignition control unit (30) prevents the alternating current fed from the outlet (25) of the transformer (20) from reaching the igniter (60).
[0028] FIG. 3 shows the electrical diagram of a re-ignition system feeding the flame detection unit (50) with direct current. The DC signal reaching the inlet (22) has a frequency of 0.5-5 kHz and is increased to a value between 100-400 volts by the transformer (20) and thus it is fed from the outlet (25) to the ignition control unit (30) as alternating current. On the other hand, a second parallel outlet (24) is taken from the transformer (20) and given to a current rectification circuit (40). The current rectification circuit (40) transmits the load, which it outputs to a direct current greater than 100 volts, to the flame detection unit (50) from its first inlet (56). In this way, a circuit that operates with the resistance effect of the flame and is fed with direct current is formed, depending on the flame detection unit (50). When the flame is discontinued in the burner (2), the flame presence signal (3) disappears and the flame detection unit (50) sends a signal from its first outlet (52) by putting the ignition control unit (30) in ignition mode. The ignition control unit (30) generates high voltage in the igniter (60) by transmitting the alternating current directly received from the transformer (20) via the outlet (25) onto the igniter (60) and ensures that the high voltage received over the feed line (5) is transmitted from the electrode element (1) to the burner (2) as a sparkover of arc across the spark gap (4). With the formation of a spark, the air-combustible gas mixture supplied by the burner (2) ignites again and the flame rectification circuit opens when the flame completes the burner (2) and the electrode element (1), allowing the flame detection unit (50) to detect the flame presence signal (3). The flame detection unit (50), which detects the flame presence signal (3), takes the ignition control unit (30) out of ignition mode from its first outlet (52) and the ignition control unit (30) prevents the alternating current fed from the transformer (20) outlet (25) to reach the igniter (60).
[0029] FIG. 4 is electrical diagram view of a representative embodiment of the re-ignition system fed with direct current that detects the flame with alternative current and has the property of power efficiency in ignition position according to the invention. It has a structure similar to the one shown in FIG. 1. However, with the exception that the battery (10) is connected to an electronic control unit (70) having a power control circuit. The electronic control unit (70) includes semi-conductor circuit elements such as logic circuit, micro-controller and transistor. Electronic control unit (70) is configured to draw power from the batter (10) if necessary and at other times to keep the power drawn from the battery (10) at the lowest level. By means of its power efficiency property, the electronic control unit (70) keeps the transformer (20) turned on continuously, as in FIG. 1 and FIG. 2, and does not continuously control the flame presence signal (3) via the flame detection unit (50). It activates the transformer (20) for a certain time (e.g. 1 second) from it first outlet (71) in a cycle, feeds alternating current from the outlet (24) of the transformer (20) to the flame detection unit (50) from the first inlet (56) and controls the presence of flame. When the flame detection unit (50) detects the flame presence signal (3), it transmits an electrical signal from its first outlet (52) to the electronic control unit (70). If the transmitted signal indicates that the flame is present, the electronic control unit (70) de-energizes the transformer (20) from its first outlet (71). In this case, the power drawn from the battery decreases to the lowest level. In this case, a certain time (e.g. 3 seconds) is waited and the cycle starts again. As long as the flame presence signal is sensed, the system continues to operate in power efficient mode. While the system is operating in the power efficient mode, if it is detected that the flame has been discontinued, the electronic control unit (70) continuously turns on the transformer (20) from its first outlet (71) and takes the system out of the power efficient mode. The electronic control unit (70) takes the ignition control unit (30) into ignition mode from its second outlet (72) and enables the igniter (60) to generate sparks. The igniter (60) continues to ignite until the flame signal (3) is received. When the flame presence signal (3) is sensed by the flame detection unit (50), by transmitting this from the first outlet (52) to the electronic control unit (70), it takes the ignition control unit (30) out of ignition mode from its second outlet (72), and the ignition of the igniter (60) stops. The electronic control unit (70) starts to turn on the transformer (20) again in a cycle from its first outlet (71), the system again returns to the power efficient mode again. In this way, the power drawn from the battery (10) is controlled, the power efficiency is increased and it is ensured that the battery is used for a longer time.
[0030] FIG. 5 is electrical diagram view of an application with two transformers of the re-ignition system fed with direct current that detects the flame with alternative current and has the property of power efficiency in ignition position according to the invention. It includes the same elements as FIG. 4, except that two transformers (20) are used. The flame detection unit (50) and the ignition control unit (30) are connected to a different individual transformer (20) connected with the electronic control unit (70) fed by the battery (10) to transmit electrical signal. Further, the igniter (60) is fed from a single transformer (20) to which the ignition control unit (30) is connected and different from the ignition detection unit (50).
[0031] FIG. 6 is electrical diagram view of an embodiment of the re-ignition system fed with direct current detecting the flame with direct current, having the property of power efficiency according to the invention. With having the same structure as embodiment given in FIG. 3, the battery (10) is not connected directly and it is connected to the system through electronic control unit (70). The electronic control unit (70) includes semi-conductor circuit elements such as logic circuit, micro-controller or transistor. Electronic control unit (70) is configured to draw power from the batter (10) if necessary and at other times to keep the power drawn from the battery (10) at the lowest level as in FIG. 4. Electronic control unit (70) does not keep the flame detection unit continuously turned on as in FIG. 3, but turns it on for a certain time at certain time intervals. In this way, it controls the power drawn from the battery (10), increases the power efficiency and ensures that the battery (10) is used for a longer time.
[0032] FIG. 7 is electrical diagram view of a representative embodiment of the re-ignition system fed with direct current that detects the flame with alternative current and has the property of power efficiency, showing that it is operated via mains voltage in ignition position according to the invention. It has a similar structure with FIG. 4. However, the difference is that the system is operated by the mains voltage (e.g. 110 volts, AC) supplied from a mains connection (80). Instead of battery (10), direct current voltage obtained by being rectified via current rectifying circuit (40) of the mains voltage feeds the system.
[0033] FIG. 8 is electrical diagram view of an application with two transformers of the re-ignition system fed with direct current that detects the flame with alternative current and has the property of power efficiency, showing that it is operated via mains voltage in ignition position according to the invention. While it has the same structure as FIG. 7, the only difference is that two transformers (20) are used. Flame detection unit (50) is fed by a separate transformer (20).
TABLE-US-00001 REFERANCE NUMBERS 1 Electrode element 2 Burner 3 Flame presence signal 4 Spark gap 5 Feed line 6 Ceramic isolator 7 Cable 10 Battery 20 Transformer 22 Inlet 24 Outlet 25 Outlet 30 Ignition control unit 40 Current rectifying circuit 50 Flame detection unit 52 First outlet 54 Second outlet 56 First inlet 58 Second inlet 60 igniter 70 Electronic control unit 71 First outlet 72 Second outlet 80 Mains connection
