JPH03177711A - Gas ignition device and gas cock - Google Patents

Abstract

PURPOSE:To ignite with a simple manipulation by passing and opening a solenoid valve at a locking release position of a knob and at the same time operating ignition means and forced valve opening means for a certain time. CONSTITUTION:A gas passage is closed by a closing element 13 at the position of stopping at which an adjusting cam 6 is closed by a moving board 27. When from this point a knob 2 is pressed down to the position where the locking is released, a solenoid valve 12 is opened by a valve rod 25 and at the same time a switch 32 is turned ON and ignition means and forced valve opening means operate. At this time the closing element 13 still closes the gas passages. When a hand is freed from the knob 2 at the position of lock releasing, an adjusting cam 6 slides forwards by a coil spring 7. And, the main rod 16 in the cam groove 22 is pulled and in the foremost section the closing element 13 is positioned at the full-open position, and at the same time the adjusting cam 6 meshes a rotating cam 9, and the knob 2 pops out to the foremost section and by the rotational manipulation the state in which thermal power adjustment can be made is given. After a certain time has passed, the ignition means and forced valve opening means stop their functions.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a gas ignition device that controls the supply of gas to a gas burner of a gas appliance such as a gas stove, and the ignition and extinguishing of gas.

Conventional technology In recent years, squawks have been put into practical use, opening and closing gas passages by pushing and adjusting the amount of gas by turning, but their structure is complex and there are problems with operability. many.

A conventional example will be described below with reference to FIG.

The gas passage formed in the cock body 4 is closed by a solenoid valve 12 and a main valve 13, and by pushing in a knob 2 arranged on the front face 1 of the device, a shaft 3 and a cam 21.
The main valve 13 and the solenoid valve 12 are opened via the rod 16,
At the same time, the knob locking means configured at 17, 18, 19° 20 is released, and the switch 32 is operated to operate the forced opening means for the solenoid valve and the ignition means (not shown). When you release your hand after waiting for the gas burner to ignite, the knob 2 pops out to the front, the ignition means stops by turning off the switch 32, and the main valve is closed by the ratchet mechanism constituted by cams 8 and 21.6. 13 is kept open, and the electromagnetic valve 12 continues to be open due to the thermoelectromotive force of the thermocouple 34. Note that the forced valve opening means stops after a certain period of time after activation. When the knob 2 is pushed in again, the ratchet mechanism is released and the main valve 13 is closed, and the knob 2 is held in its original position by the locking means of the knob, and the solenoid valve 1 is
2 is a configuration in which the electromotive force of the thermocouple 34 is weakened by extinguishing the gas burner, so that the valve closes poorly.

When the knob 2 is rotated at the front end, the fire power adjustment cam 9 is rotated via the shaft 3 and the cams 8 and 6, and the fire power adjustment rod 14 is displaced along the cam shape formed on the shaft 3, thereby displacing the fire power adjustment valve. 22 moves to adjust the gas amount.

In addition, if you press the knob 2 at the position where the gas amount is adjusted to the minimum to extinguish the fire, and then press it again from that position to ignite, there is a problem that it will be difficult to ignite because the gas amount is the minimum, and the gas amount will change only when the ignition is operated. Push the leaf spring 10 through the slide cam 5 so that it becomes larger, and then press the heat adjustment cam 9. The configuration is such that the amount of gas is increased by sequentially pushing the thermal power adjusting rod 14 and the thermal power adjusting valve 22.

Problems to be Solved by the Invention However, in this configuration, the gas passage opening/closing means and the gas amount requesting means are separate configurations, and the displacement of the knob 2 and the rod 16 for opening the main valve 13 during use are different.
The structure is very complicated and expensive as it requires a ratchet mechanism because the displacement of The solenoid valve 12 cannot be held open by thermoelectromotive force unless the knob 2 is pressed down for a while or the solenoid valve 12 is not completely pressed against the solenoid valve body 35, so the spring 7.11.2
6.15, etc., and you have to push knob 2 quite far into the cooking area, or, like on a gas stove, you generally increase the heat at the beginning of cooking, then lower the heat toward the end to extinguish the fire. At the time, the firepower was weak, making it difficult to confirm ignition, and at the same time, the firepower had to be increased each time.

Therefore, the first object of the present invention is to provide a gas ignition device that automatically ignites the gas by simply pressing the knob lightly and releasing the knob.

A second object is to provide a gas igniter that, even if the fire is extinguished by pushing the fire under a condition where the fire power is adjusted to be low, the fire power will always increase when the fire is ignited again.

The third objective is to provide a gas cock that has a simple structure and is inexpensive.

Means for Solving the Problems Therefore, in order to achieve the first object, the present invention provides a locking means for locking and releasing the knob against a spring force during the pushing stroke of the knob, and a push operation of the knob. When the knob is in front of the lock position, the gas passage is opened, and when the knob is in the lock position or further back from the lock position, the gas passage is closed. A solenoid valve that opens in the unlocked position by pressing the knob and maintains the open state against spring force by applying electricity, and is electrically connected to this solenoid valve to release the knob. A forced valve opening means for supplying a current to keep the valve open for a certain period of time, and an ignition means that also operates for a certain period of time are provided.

Furthermore, in order to achieve the second object, the present invention provides a knob that can be rotated and pushed, a closure that controls gas flow rate adjustment by opening and closing a gas passage and changing the area of the gas passage; It is interposed between the knobs, and when the knob is at the back, it closes the gas passage, and when it is at the front, it opens the gas passage.
In addition, when it is at the forefront, the amount of gas can be adjusted by turning a knob, and when the knob is pushed back at any rotational position, a cam device is provided that can adjust the amount of gas to a constant level when it is at the forefront again. .

In order to achieve the third object, the present invention includes a cock body that forms a gas passage, a substantially rectangular parallelepiped closure that slides at right angles to a gas passage hole within the cock body to open and close the gas passage hole; It is provided with an elastic body that urges the closure to press against the sliding surface, and a flat plate-shaped orifice that has a group of small holes as gas passage holes and is mounted in pressure contact with the closure surface. be.

Function The gas igniter of the present invention is such that when the knob is in the unlocked position during the push stroke, the solenoid valve opens and the forced valve opening means and ignition means operate for a certain period of time. The ignition will also occur automatically.

In addition, the cam device is configured so that when the knob is pushed back at a desired rotational position, the closure will be in a fixed position, so when using it on a gas stove, etc., be sure to set it so that the firepower is high when igniting it. be able to.

Furthermore, the gas cock of the present invention has a nearly rectangular shape for the closure that controls the opening and closing of the gas passage, and has a gas volume adjustment function with a simple configuration in which a flat plate-shaped orifice with a group of small holes is pressed against the closure. It is possible to have both.

EXAMPLE Hereinafter, a gas igniter according to an example of the present invention will be explained with reference to the drawings.

FIG. 1 schematically shows an embodiment of a gas stove, FIG. 2 is an enlarged sectional view of a gas cock portion thereof, and FIG. 3 is an exploded perspective view thereof.

In FIGS. 1 to 3, a knob 2 is arranged facing a guide hole provided in an instrument operation panel 1, and this knob 2 is
A shaft 3 having a cross-sectional shape is directly connected to the cock body 4, and is supported by a support fitting 5 fixed to the cock body 4. An adjustment cam 6 having a substantially cylindrical shape is rotatably attached to the tip of the shaft 3, and its inner surface fits into the cylindrical portion of the cock body 4, and is biased by a coil spring 7 to slide in the axial direction. , the terminal end can rotate within a certain range. A tooth profile 8a is formed on the bottom surface of the adjusting cam 6, and a rotary cam 9, which has a tooth profile 8b that engages with the tooth profile 8a and is freely axially rotatable with the shaft 3, is mounted on a plate. It is attached to the support fitting 5 by a spring 10. Here, the knob 2 can be pushed and operated against the coil spring 7, and can be rotated within a certain range due to the engagement between the adjusting cam 6 and the rotating cam 9 at the position protruding to the front.

On the other hand, the cock body 4 forming the gas passage is equipped with a solenoid valve 12 biased by a spring 11 as a first means for opening and closing the gas passage on the upstream side through which gas flows, and a second solenoid valve 12 on the downstream side. As an opening/closing means, a substantially rectangular parallelepiped metal closure 13 is slidably attached. A gas passage hole is formed in this closure 13 in a direction perpendicular to its sliding direction, and one surface on which this gas passage hole is formed and the cock body 4 are made into a precision smooth surface and are mutually connected via grease. Slide to . In addition, a flat plate-shaped orifice 14 having a group of small holes is pressed against the other surface of the closure 13 by a spring 15 with a constant load, and at the same time, the spring 15 also presses the closure 13 against the cock body 4. be. The main rod 16 connected to the closure 13 has its other end facing outside the gas passage via an O-ring 17, and slides the closure 13 in conjunction with the aforementioned adjustment cam 6. Note that 18 is a gas seal, and 19 is a metal fitting that presses the gasket 17 and supports the spring 15. The gas flowing in from the inlet hole of the cock body 4 is passed through the solenoid valve 12. Orifice 14. It passes through the closure 13 and reaches the outlet hole, and the gas burner 20
It is supplied to

Next, at the end of the main rod 16, a bottle 21a is provided in a direction perpendicular to the axis.
and 21b are attached, and rotation of the main rod 16 is restricted by the groove provided in the cylindrical portion of the cock body 40 and the bottle 21b. On the other hand, a cam groove 22 (see FIG. 4) is formed in the side wall of the aforementioned adjusting cam 6 to engage the pin 21a and indirectly adjust the displacement of the closing member 13. In addition, a convex portion 23 is formed on a part of the side wall of the cylindrical portion of the cock body, and a cam shape 24 is formed on the inner wall of the adjusting cam 6 (see Fig. 5), so that the rotational position is constant when the adjusting cam 6 is pushed in. be. Knob 2 mentioned above. Shaft 3, adjustment cam 6, main rod 16. Closure 13. The solenoid valves 12 are constructed so as to be substantially on the same axis, and the solenoid valves 12 are arranged at one end of the closure 13.
The valve rod 25 is urged by a spring 26 and is slidably mounted so that the valve rods 2 and 2 are also on the same axis. The set load of this spring 26 is applied to the solenoid valve 12 described above.
The load is greater than the maximum load of the spring 11 that urges the.

A movable plate 27 is further provided on the side wall of the above-mentioned support fitting 5.
8 and rotates against a spring 29 locked to the support metal fitting 5. The movable plate 27 has a bin 3 at its rotating end.
0 is fixed perpendicularly to the rotating surface, and its tip engages with a heart cam 31 (see FIG. 6) formed on the side wall of the aforementioned adjustment cam 6, and as the adjustment cam 6 slides, the movable plate 2
Reference numeral 7 swings to lock and release the adjusting cam 6 against the coil spring 7. At the same time, the switch 32 is turned on and off by the swinging of the movable plate 27.

A plug 33 for ignition is provided near the flame port of the gas burner 20.
and a thermocouple 34. This thermocouple 84 is electrically connected to the electromagnetic valve main body 35, generates a thermoelectromotive force in response to the flame of the gas burner, and supplies a current capable of keeping the electromagnetic valve 12 open. Further, a forced valve opening means electrically connected to the solenoid valve body 35 via the switch 32 described above in parallel with the thermocouple 34 supplies a current for forcibly holding the solenoid valve 12 open at the initial stage of ignition. supply. Further, the time control means operated by the signal from the switch 32 is for controlling the operation time of the above-mentioned forced valve opening means and the ignition means electrically connected to the plug 33.

To explain the operation of the gas igniter configured as above, the gas passage is closed by the closure 13 at the stop position where the adjustment cam 6 is locked by the movable plate 27, and from this position the knob 2 When the solenoid valve 12 is pushed to the unlocked position, the solenoid valve 12 is opened by the valve rod 25, and at the same time, the switch 32 is turned on and the ignition means and forced valve opening means are activated. At this point, the child is 13 years old.
The gas passage is still closed. When you release the knob 2 at the unlocked position, the coil spring 7 causes the adjustment cam 6 to slide forward, pull the main rod 16 at point A of the cam groove 22, and fully open the closing member 13 at the frontmost position. At the same time, the adjusting cam 6 engages with the rotary cam 9, and the knob 2 pops out to the front, making it possible to adjust the firepower by turning the knob. After a certain period of time has elapsed, the ignition means and forced valve opening means stop functioning.

Next, when the knob 2 is turned to the frontmost position, the rotating cam 9 is moved from the shaft 3. The rotation is transmitted to the adjustment cam 6, and the bin 21a attached to the main rod 16 moves along the cam groove 22, thereby adjusting the closure 13. At this time, orifice 14
A group of small holes formed in the gas chamber are sequentially opened and closed by the closure 13 to adjust the gas amount. Note that this orifice 14 should be replaced depending on the type of gas and the capacity of the device.

Then, when the knob 2 is pushed in at any rotational position of the knob 2, for example at point B in FIG. At the same time, as shown in FIG. 5, the adjusting cam 6 is forced to rotate according to the cam shape 24, reaches point A, and slides to the innermost position. At this time, the gas passage is closed by the closure 13 to extinguish the fire, the movable plate 27 is rotated to the lock position, and the switch 32 is reset. Therefore, the next time the knob 2 is pushed in again to perform the ignition operation, the amount of gas will always reach the maximum.

As described above, according to this embodiment, the following effects are obtained.

(1) The gas burner can be reliably ignited by the simple operation of pushing the knob from the locked state until it is unlocked and then releasing the knob.

(2) Even if it is difficult to ignite due to air getting into the gas passage, there is no need to keep pressing the knob for a while; you can automatically ignite by simply pressing and releasing the knob.

(3) When the power is not energized, when the knob is pushed in, the gas passage is closed by the closure, and when the knob is pushed forward, the gas passage is closed by the solenoid valve, so it is easy to turn off the power. Safety can be ensured even against mischievous operations by children and the like.

(4) Even if the fire is extinguished at a position where the amount of gas is adjusted to be small, the amount of gas will be at its maximum when it is ignited again.
The usability of gas stoves etc. can be improved.

(5) Unlike the conventional example, there is no need for a mechanism that increases the amount of gas only at the time of ignition, and the amount of gas always reaches the maximum at the time of ignition, so the structure is simple and the ignition performance can be improved.

(6) The structure for opening and closing the gas passage can be simplified by forming the closure into a substantially rectangular parallelepiped shape and making its sliding direction coincide with the operating direction of the knob.

(7) By forming the closure into a substantially rectangular parallelepiped shape, one side can be used to open and close the gas passage, and the other side can be used in combination with an orifice to adjust the gas amount, which simplifies the structure.

(8) Since the gas sealing surfaces of the closure and the cock body are flat, manufacturing is easy and stable quality can be ensured.

Effects of the Invention As described above, in the gas igniter according to the first aspect, the following effects can be obtained.

(1) During ignition operation, the solenoid valve is reliably pushed open when the knob is in the unlocked position, and at the same time the ignition means and forced valve opening means are operated for a certain period of time, making it easy to operate by pushing the knob and releasing the hand. It can be ignited with.

(2) Since the closure and solenoid valve cannot be open at the same time when the power is not energized, the simple method of turning off the power ensures safety against mischief by children and others. can do.

Further, in the gas ignition device according to the second aspect, the following effects can be obtained.

(1) Even if the fire is extinguished at a position where the amount of gas is adjusted to be small, the amount of gas can be kept constant when the ignition is re-ignited, making it possible to improve the usability of gas stoves and the like.

(2) At the time of ignition, the configuration allows setting the optimum amount of gas for ignition, making it possible to improve ignition performance.

Furthermore, in the gas cock of claim 3, the following effects can be obtained.

(1) By forming the closure into a substantially rectangular parallelepiped shape, it can be used not only to open and close the gas passage but also to adjust the amount of gas in combination with an orifice, making the structure simple and inexpensive.

(2) Since the gas sealing surfaces of the closure and the cock body can be configured as flat surfaces, manufacturing is easy and stable quality can be ensured.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of a gas igniter according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the gas cock, Fig. 3 is an exploded perspective view of the same elements, and Figs. 4 to 6 are the main parts of the same. The explanatory diagram, FIG. 7, is a side sectional view of a conventional gas ignition device. 1...Operation panel, 2...Knob, 4
...Cock body, 6...M-section cam, 7
......Coil spring, 9...Rotating cam, 1
2... Solenoid valve, 13... Closer, 14.
...Orifice, 16 ...Main rod, 2
7...Movable plate, 32...Switch.

Claims (3)

[Claims] (1) A knob that is installed on the operation part of a gas appliance such as a gas stove and that can be pushed and operated against the force of a spring, and a knob that can be locked and released against the force of the spring during the push stroke of the knob. a locking means to obtain the locking means; and a closing member that opens the gas passage when the knob is in front of the lock position and closes the gas passage when the knob is in the lock position or deeper than the lock position in conjunction with the push operation of the knob. , a solenoid valve that is biased by a spring and closes a gas passage, and that opens in the unlocked position by pushing the knob and maintains the open state against the spring force when energized; and this solenoid valve. A gas ignition device comprising forced valve opening means that is electrically connected to the knob and supplies a current to keep the valve open for a certain period of time from when the knob is unlocked, and an ignition means that also operates for a certain period of time. (2) A knob that can be rotated and pushed against spring force, a closure that opens and closes the gas passage and adjusts the gas amount by changing the area of the gas passage, and between this closure and the knob When the knob is at the back, the gas passage is closed, when it is at the front, the gas passage is opened, and when it is at the very front, the gas amount can be adjusted by turning the knob. A gas igniter comprising: a cam device which can be pushed back in position and adjusted to a constant gas amount when in the forward position again. (3) A cock body that forms a gas passage, a nearly rectangular parallelepiped closure that slides perpendicularly to the gas passage hole in the cock body to open and close it, and presses this closure against the sliding surface. A gas cock comprising: an elastic body that biases the cock; and a flat orifice having a group of small holes as gas passage holes and mounted in pressure contact with the closing surface.