JPH08226630A - Combustion controller - Google Patents

Abstract

PURPOSE: To provide a function of improving safe property or handling convenience simply it a low cost without affecting the performance specific to a combustion appliance. CONSTITUTION: In a grille for table range with grille, a magnetic solenoid valve 1 is a one-main body two-electromagnet type solenoid valve, provided with two pieces of coils 6, 12 and a valve body, attracted, opened and retained only when current is conducted through both of the coils, while one coil 6 is connected to a thermocouple circuit 20 and the other coil 12 is connected to a energizing control circuit 22, provided with a dry cell 23, a thermal switch 24, a vibration sensitive switch 25, a timer switch 26 and interlocking switch 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion control device used in a water heater, a cooker such as a table hob or a rice cooker.

[0002]

2. Description of the Related Art As a combustion control device, a thermocouple circuit is constructed by a thermocouple installed near a burner and an electromagnetic valve provided in a gas supply path and shutting off gas supply by closing a valve. A solenoid valve that is forcibly opened at ignition is held open by the thermoelectromotive force of a thermocouple that senses the burner flame, and when the flame is extinguished, the solenoid valve is closed by decreasing the thermoelectromotive force. Devices and the like are known. Further, by combining various control switches such as a thermal switch and a timer switch with this safety device, it has been attempted to add a function for improving safety and usability such as overheat prevention and cooking for a set time.

[0003]

However, when such a control switch is used in the thermocouple circuit, the contact resistance increases, the durability deteriorates, and a stable current does not flow in the circuit. However, it causes an ignition failure and an influence on the throttling characteristic of the thermal power, which hinders the original performance of the combustion appliance such as the water heater or the cooker. Therefore, if the electromotive force level of the thermocouple and the state of the control switch are separately input and monitored by using an electronic circuit, it is possible to operate with each setting without the above influence, but on the other hand ,
There will be a new cost problem associated with the production of the control board.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention provides a combustion control device which can easily and inexpensively provide a new function that can improve the above-mentioned safety and usability without affecting the inherent performance of a combustion appliance. The configuration is
Two electromagnets that can be independently excited are provided side by side in one main body, and the valve body biased in the valve closing direction is forcibly opened by a manual operation or an electric driving force. Only when both electromagnets are excited, an electromagnetic valve for holding the valve element by adsorption and opening is arranged in the gas supply path, and the gas supply path is opened when the valve element is held by adsorption and opening. Further, one electromagnet in the solenoid valve is connected to a thermocouple arranged in the vicinity of the burner, and the other electromagnet is controlled by a power source and the energization to the other electromagnet by operating at an arbitrary setting. It is characterized by being connected to an energization control circuit including a switch. Particularly in the solenoid valve, one of the two electromagnets is a first electromagnet consisting of a fixed iron core fixed in the main body and a coil wound around the fixed iron core, and the other is the first electromagnet. A second electromagnet comprising a movable iron core arranged facing each other so as to be movable back and forth in the first electromagnet direction, and a coil which is wound around the movable iron core in a non-contact manner and is integral with the main body side. Between the one electromagnet and the second electromagnet, a suction piece movable between the two electromagnets may be arranged, while the movable iron core may be integrally connected with the valve body. Further, examples of the control switch include a temperature switch that operates at a predetermined temperature, a timer switch that operates at a predetermined time, a seismic switch that operates by detecting vibration, and a pressure switch that operates at a predetermined pressure.

[0005]

The valve element forcibly opened has two conditions: when the thermoelectromotive force of the thermocouple to which one electromagnet is connected is obtained, and when the required amount of electricity is obtained in the electricity supply control circuit. Only when the condition is satisfied, the adsorption valve is held and the gas supply is continued. Therefore, if the energization in the energization control circuit is controlled by the control switch, the solenoid valve can be closed under a predetermined condition in addition to turning off. According to the solenoid valve of claim 2, when the two electromagnets are excited while the valve body is forcibly opened, both the first electromagnet and the second electromagnet adsorb the attraction piece between them to open. The valve state is retained. When the excitation of only the first electromagnet is released here, the attraction between the first electromagnet and the attraction piece disappears, so the valve body moves in the valve closing direction by the urging force while the attraction piece is attracted to the movable iron core. When the excitation of only the two electromagnets is released, the attraction between the second electromagnet and the attraction piece disappears, so the valve body moves in the valve closing direction by the biasing, leaving the attraction piece on the fixed core side. Further, if, for example, a temperature sensitive switch is adopted as the control switch, the O
You can cut off the gas supply by stopping the energization by FF operation, turn off the energization by turning off the power at a predetermined time with the timer switch, stop the energization by detecting vibration such as an earthquake with the seismic switch, and with the pressure switch with the predetermined Various conditions can be applied, such as turning off the power supply to stop energization. Further, since these control switches are connected to an energization control circuit equipped with a power source, in addition to the thermocouple, the influence of contact resistance is small and the original performance of the combustion appliance is not hindered.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. First, the structure of the magnet solenoid valve 1 used here will be described. In FIG. 1, a base body 4 around which a flange portion 3 is provided is fitted to one end of a cylindrical casing 2, and a U-shaped fixing coil 6 is wound around the base body 4 on the casing 2 side. The base end of the iron core 7 is fitted and fixed to form the first electromagnet 5. On the other hand, the other end of the casing 2 is a closed portion 8, and the closed portion 8 is provided with through holes 10, 10 through which a U-shaped movable iron core 9 also loosely penetrates.
A small current type coil 12 having a larger number of turns than the coil 6 is embedded around 0 and 10, and the second electromagnet 11 is provided.
Is composed. Further, a ring-shaped movable piece 13 is arranged between the fixed iron core 7 and the movable iron core 9 in a free state, and the movable piece 13 goes from the closed portion 8 to the casing 2 to the through hole 13a at the center thereof. Fixed iron core 7 aligned with the axis of
The guide portion 8a extending to the side penetrates to guide the sliding in the axial direction. Further, the movable iron core 9 is connected to the base end portion of the valve shaft 15 in the housing 14 connected to the casing 2, and the tip end portion of the valve shaft 15 penetrates the housing 14 and the valve body 16 is provided outside the housing. Is integrally provided and is urged toward the tip end side (valve closing side) by a compression spring 17 provided between the valve body 16 and the housing 14. 18a and 18b are terminal fittings connected to the coils 6 and 12, respectively.

The magnet solenoid valve 1 thus constructed
In the above, the movable iron core 9,
When the movable piece 13 is forcibly retracted to a position where it abuts on the fixed iron core 7 and stops, and both coils 6 and 12 are energized, both the excited first electromagnet 5 and second electromagnet 11 move. As shown in FIG. 1A, the movable piece 13 is attracted to the fixed iron core 7, and the movable iron core 9 also maintains the position where it is attracted to the movable piece 13 against the bias of the compression spring 17. . Therefore, the valve body 16 is also held in the retracted position, and the valve open state is maintained. Further, when the energization of only the coil 6 is stopped from this state, the excitation of the first electromagnet 5 is released and the movable piece 13 is separated from the fixed iron core 7, but the excitation of the second electromagnet 11 is continued, so that the movable iron core is continued. While the movable piece 13 is attracted, 9 is projected to the position of FIG. 1 (B) together with the valve shaft 15 and the valve body 16 by the bias of the compression spring 17. On the contrary, when the energization of only the coil 12 is stopped,
As shown in (C), only the movable core 9, the valve shaft 15, and the valve element 16 are protruded in the valve closing direction by the compression spring 17 while the movable piece 13 is attracted to the fixed iron core 7.

Therefore, when the magnet solenoid valve 1 is used in various combustion appliances, a highly reliable combustion control device can be easily constructed. Hereinafter, the circuit configured together with the control switch will be described together with schematic diagrams of the respective combustion appliances. First, when used in a grill with a table-top with a grill as shown in FIG. 2, as shown in the circuit diagram, one coil 6 is connected in series with a thermocouple 21 arranged near the burner to form a thermocouple circuit 20. Then, the other coil 12 (small current type) is connected to a dry battery 23 as a power source, a thermal switch 24 as a temperature sensitive switch that is turned off when a set temperature is reached, and a seismic switch 25 that is turned off when vibration is detected. A timer switch 26 that is turned off after a lapse of a set time, and an interlock switch 27 that is turned on in association with the ignition operation of the grill are connected to the energization control circuit 22 arranged in series. As shown in the figure, the thermal switch 24 is installed in an exhaust passage 29 in a grill cabinet 28 to detect the exhaust temperature,
The seismic switch 25 is installed at an arbitrary position such as on the side of the main body of the table stove and has a mercury switch or a ball contact arranged between both electrodes, and the ball is separated from both electrodes by vibration. Then, a well-known switch such as a ball-on switch that cuts off the energization between the electrodes and returns the ball that has been separated by the reset is adopted. And timer switch 26
Is connected to a timer setter 26a such as a dial provided on the front surface of the table stove, and can set an arbitrary time.

Therefore, in the above-mentioned grill, when the valve body 16 of the magnet solenoid valve 1 is forcibly pushed in by the ON operation of the ignition button, the movable iron core 9 and the movable piece 13 retreat toward the fixed iron core 7 side and come into contact therewith. At this time, the energization control circuit 2
The second interlocking switch 27 is closed, a current flows through the coil 12, the second electromagnet 11 is excited, and the thermoelectromotive force of the thermocouple 21 increases after ignition, so that a current flows through the coil 6 and the first electromagnet 5 Is also excited, the valve open state of FIG. 1 (A) is maintained. When the burner extinguishes, the thermoelectromotive force applied to the coil 6 is reduced, and the excitation of the first electromagnet 5 is released, resulting in the state shown in FIG. 1B. Returns to the valve closed position and shuts off the gas supply. On the other hand, in the energization control circuit 22, first, when the water in the pan 28a runs out and the oil of fish or meat ignites in the grill case 28, the thermal switch 24 of the exhaust passage 29 reaches the set temperature due to the increased exhaust temperature. Turns off. Then, the energization in the energization control circuit 22 is stopped, and the coil 12 is not energized,
The state of FIG. 1C in which the excitation of the second electromagnet 11 is released, and similarly, the valve body 16 is returned to the valve closed position by the biasing of the compression spring 17, and the supply of gas is shut off. In addition, the table stove may fall due to an earthquake or other external factors,
Or, if an object is dropped on the table stove and vibration is applied to the table stove, the seismic switch 25 is turned off and the energization in the energization control circuit 22 is stopped. The body 16 is closed and the gas supply is cut off. Furthermore, the adoption of the timer switch 26 allows the time set by the timer setting device 26a to elapse,
The timer switch 26 is turned off and the energization control circuit 2
The energization of 2 can be stopped and the magnet solenoid valve 1 can be closed. As described above, in the present embodiment, the fire prevention of the grill by the thermal switch 24, the fire prevention at the time of an earthquake by the seismic switch 25, and the timer switch 26.
It is possible to improve safety and usability such that cooking can be performed at any time setting by, but especially these control switches are combined with the improved 1 main body 2 electromagnet type magnet solenoid valve 1 and especially the thermocouple circuit By connecting to the energization control circuit 22 equipped with a dry battery power source separately from 20,
Even if a plurality of control switches are adopted, the influence of contact resistance is small, and suitable durability and stability can be maintained. Furthermore, since one magnet solenoid valve 1 can provide the above-mentioned plurality of functions, there are few design changes, and it can be easily realized at low cost. Further, once the valve is closed, even if the switch returns to ON, it is safe because it does not open unless the valve is manually opened.

When the above combustion control device is used on the stove side of the table stove, the seismic switch 25 and the timer switch 26 can be applied in the same manner as described above, but particularly as a temperature switch, the thermal switch 24 is used. Instead, as shown in FIG. 3, using a PTC thermistor 24a or the like that contacts the bottom of a pot or the like placed on Gotoku and detects the pot bottom temperature, the PT
The energization amount in the energization control circuit 22 may be decreased by the sudden increase of the electric resistance value due to the reaching of the set temperature of the C thermistor 24a, and the excitation of the second electromagnet 11 by the coil 12 may be released. Of course, the thermal switch 24 can also be used as a pan bottom sensor. In this way, if the thermal switch 24, the PTC thermistor 24a, etc. are used in the cooking stove, in addition to the prevention of the fire of the tempura, the convenience of the cooking such as automatic cooking and the prevention of burning will be obtained.

Suitable multi-functionalization by adopting such an improved solenoid valve can be performed in other cooking devices. FIG. 4 shows a combustion control device applied to a rice cooker. The magnet solenoid valve 1 here controls the gas supply to the main burner 31 for rice cooker in the rice cooker 30. As shown in the schematic diagram, the spindle 33 retracted by the push operation of the rice cooking lever 32 pushes the valve body 16 to forcefully open the valve, and as shown in the circuit diagram, the thermocouple 21 installed near the main burner 31. The thermocouple circuit 20a according to the above and the energization control circuit 22a in which the thermal switch 24, the resistor 39, and the interlocking switch 27 which is turned on by the push operation of the rice cooking lever 32 are arranged in series in the dry battery 23 are respectively used in the same manner as the coil 6, 12 is energized to hold the adsorption valve open. Therefore, here, when the main burner 31 is extinguished, the adsorption current to the coil 6 decreases due to a decrease in the thermoelectromotive force of the thermocouple 21, and the excitation of the first electromagnet 5 is released and the valve is closed as described above. In addition, the thermal switch 24 in the energization control circuit 22a senses the temperature (for example, 130 ° C.) of the pot bottom 34 at the completion of rice cooking and is turned off, so that automatic rice cooking is possible. Needless to say, the seismic switch 25 may be connected to the energization control circuit 22a, and it is possible to cope with a fall of the device due to an earthquake or the like, and the risk of fire is eliminated. Note that automatic rice cooking can be performed by using the pressure switch 35 instead of the thermal switch 24. As shown in FIG. 5, when the gas enclosed by the diaphragm 36 in the pot bottom 34 senses the pot bottom temperature and raises the pressure, the diaphragm 36 is inverted to the position shown by the solid line and is urged upward. Push down the rod 37 to open the contact 38
The F operation is performed, and even with this configuration, the purpose of completing the rice cooking at the predetermined temperature can be achieved. As described above, also in the rice cooker, by combining with the magnet solenoid valve 1, it is possible to achieve an effect that various switches can be adopted easily and at low cost without affecting the original performance of the appliance.

On the other hand, the above structure can be applied to a water heater. In FIG. 6, reference numeral 40 denotes a water heater, here a thermocouple 21.
Is arranged in the vicinity of the burner 41 that heats water by the heat exchanger 42 to form a thermocouple circuit 20b with the coil 6. In the energization control circuit 22b, the dry battery 23 is used in the same manner as in FIG.
In addition, the thermal switch 24, seismic switch 25, timer switch 26, interlocking switch 27, and coil 12
, Which are connected in series, the vibration sensor 25 is provided at an arbitrary position of the water heater 40 main body to detect vibration, and the thermal switch 24 is installed in the inner shell window 43 below the heat exchanger 42 to remove heat. It detects combustion exhaust heat that rises in temperature when the exchanger 42 is clogged, and turns off when the temperature reaches a predetermined temperature to stop energization of the energization control circuit 22b, thus preventing incomplete combustion. Becomes In addition, the timer switch 26 is provided on the operation plate on the front of the water heater 40 by the timer setting device 2
If 6a is provided and turned off at any set time,
You can prevent forgetting to erase. Therefore, also here, by combining the improved solenoid valve and each control switch, a combustion control device excellent in safety and usability can be constructed.

As described above, according to the present invention, various control switches are provided on the energization control circuit side provided with the power source in the improved solenoid valve so that the control device can be used without affecting the performance of the combustion appliance. The types are not limited to those listed above, and various types such as a water pressure switch and a water flow switch can be adopted according to the function to be imparted to the combustion instrument, in addition to the above.

[0014]

As described above, according to the present invention, each control switch can be connected to the energization control circuit on the power supply side, separately from the thermocouple for detecting the turn-off, so that the durability and stability are affected by the contact resistance. It is possible to add various functions that improve safety and usability without affecting the operation. In addition, since there is only one solenoid valve, there are few design changes, and it is possible to easily configure at low cost. When the fixed iron core, the movable iron core, and the like are adopted as in the second aspect of the present invention, a simple structure with few design changes can be obtained. Furthermore, if the control switch is a temperature sensitive switch, it is possible to cut off the gas supply at a predetermined temperature, so fire prevention and automatic cooking on the table stove and grill,
It can be applied to prevent non-sticking, and the rice cooker can be provided with functions such as automatic rice cooking, and the water heater and water heater can be used to prevent incomplete combustion. Further, if the control switch is a timer switch, it can be applied to the above-mentioned cooking device for timer cooking and for a water heater etc. to prevent forgetting to turn it off. If the control switch is a seismic switch, the danger of fires due to falling of the earthquake or falling objects on the burner is eliminated in all combustion appliances. Further, if the control switch is a pressure switch, automatic rice cooking can be suitably performed in the rice cooker, which improves usability.

[Brief description of drawings]

FIG. 1A is an explanatory diagram of a magnet solenoid valve. (B) It is explanatory drawing of a magnet solenoid valve. (C) It is explanatory drawing of a magnet solenoid valve.

FIG. 2 is an explanatory diagram of an embodiment in which a combustion control device is adopted in a grill of a table stove with a grill.

FIG. 3 is an explanatory view of an embodiment in which a combustion control device is adopted for a stove of a table with a grill.

FIG. 4 is an explanatory diagram of an embodiment in which a combustion control device is adopted in a rice cooker.

FIG. 5 is an explanatory diagram of an embodiment in which a combustion control device is adopted in a rice cooker.

FIG. 6 is an explanatory diagram of an embodiment in which a combustion control device is adopted in a water heater.

[Explanation of symbols]

1 ... Magnet solenoid valve, 5 ... First electromagnet, 6 ... Coil, 11 ... Second electromagnet, 12 ... Coil, 16 ...
Valve body, 20, 20a, 20b ... Thermocouple circuit, 21 ...
Thermocouple, 22, 22a, 22b ··· Energization control circuit, 24
..Thermal switches, 25 ...
・ Timer switch, 27 ... Interlocking switch, 28 ...
Grill box, 30 ... rice cooker, 35 ... pressure switch, 4
0 ... water heater.

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location F23N 5/20 F23N 5/20 H 5/24 111 5/24 111Z

Claims (6)

[Claims] 1. A body which can be independently excited in one body.
Only when both electromagnets are excited in a state where two electromagnets are provided side by side and the valve body biased in the valve closing direction is forcibly opened by a manual operation or an electric driving force. An electromagnetic valve for holding and holding the body by adsorption is arranged in the gas supply path, and the gas supply path is opened when the valve body is held by adsorption and opening, and one of the electromagnets in the solenoid valve is It is connected to a thermocouple arranged near the burner, and the other electromagnet is connected to an energization control circuit equipped with a power source and a control switch that operates at an arbitrary setting to control energization of the other electromagnet. Combustion control device characterized by. 2. One of the two electromagnets in the solenoid valve is a first electromagnet including a fixed iron core fixed in the main body and a coil wound around the fixed iron core, and the other is the first electromagnet. A second electromagnet, which is arranged so as to face each other and is provided so as to be movable back and forth in the direction of the first electromagnet, and a coil which is wound around the movable iron core in a non-contact manner and is integrated with the main body side. Between the first electromagnet and the second electromagnet,
The combustion control device according to claim 1, wherein the movable iron core is integrally connected to the valve element while the movable suction piece is arranged between the two. 3. The combustion control device according to claim 1, wherein the control switch is a temperature sensitive switch that operates at a predetermined temperature. 4. The combustion control device according to claim 1, wherein the control switch is a timer switch that operates at a predetermined time. 5. The combustion control device according to claim 1, wherein the control switch is a seismic switch that operates by detecting vibration. 6. The combustion control device according to claim 1, wherein the control switch is a pressure switch that operates at a predetermined pressure.