JPH0261421A - Igniter - Google Patents

Abstract

PURPOSE:To contrive higher igniting properties by opening a solenoid safety valve and an igniting pilot valve only when an ignition operating lever is pressed, enabling a fulcrum of the lever to be set into first and second positions, and causing a hammer to strike a piezoelectric element in conjunction with a movement beyond the second position. CONSTITUTION:With an ignition operating lever 1 at a start end position A depressed, a shaft fulcrum 25 is maintained in a position (a), and a solenoid valve 9 and an igniting pilot valve 10 are opened to supply a gas to a pilot burner for ignition and steady combustion and a main gas burner for steady combustion. When the lever 1 is depressed beyond an intermediate position B, the fulcrum 25 is set to a position (b), and an oscillatable lever 35 is engaged with a hammer 4. Then, the engagement is released, and the hammer 4 is driven by a spring 5 to stroke a piezoelectric element 3, thereby igniting the burners. When the lever 1 is released from depression at a final end position C, the lever 1 is fastened in the position B, whereby the valve 10 is closed, whereas the valve 9 is kept open by an electromotive force of a thermocouple, thereby maintaining combustion. When ignition is failed at the time of an ignition operation, the valve 9 is closed. In that case, with the lever 1 is depressed from the position B to the position C, an igniting operation is conducted. Thus, ignition properties, safety and operability are enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an ignition device for a gas heater or other gas combustor.

(Prior Art) Conventionally, an operating lever is provided, which is pushed from a starting position to an intermediate position to a terminal position, and is locked at the intermediate position. A device in which energy is stored in a spring that drives a hammer to a piezoelectric element, and then the spring drives a hammer to the piezoelectric element is disclosed in Publication of Utility Model Publication No. 63-2609.
It is known from Publication No. 6.

(Problem to be Solved by the Invention) However, in this device, although the gas valve is opened by operating the operating lever from the starting end position to the final end position, the gas valve is opened even when the operating lever is returned to the intermediate position. The valve is configured to be kept in an open state.

Therefore, if there is an ignition error, there is a risk that a large amount of raw gas will be released.

The object of the present invention is to obtain an ignition device free of such defects.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes an ignition operating lever that is pushed from a starting position, through an intermediate position, to a terminal position, and is temporarily locked at the intermediate position. In conjunction with the pushing operation of the ignition operating lever from the intermediate position to the terminal position, energy is stored in a spring that strikes the piezoelectric element with a hammer, and then the spring causes the hammer to strike the piezoelectric element. In this process, an electromagnetic safety valve and an ignition pilot valve, which are interposed in a gas passage connected to a gas burner, are linked so that the valves are pressed open only when the ignition operating lever is pressed, and the fulcrum of the ignition operating lever is The ignition control lever can be set to a first position when moving from a starting end position to a terminal position and a second position when moving from an intermediate position to a terminal position, and the fulcrum can be set to a second position when moving beyond the second position. In conjunction, the energy of the spring that strikes the piezoelectric element with the hammer is accumulated, and then the spring strikes the hammer with the piezoelectric element.

(Function) In the ignition device having the above configuration, when the ignition operating lever is pushed down from the starting end position to the terminal end position, the operating lever first swings around the first position of the fulcrum, and the electromagnetic safety valve When the ignition pilot valve is opened and the electromagnetic safety valve and the ignition pilot valve are pushed open, the fulcrum of the ignition operating lever further moves from the first position beyond the second position, and is linked to the operation. Energy is stored in the spring that hammers the piezoelectric element, and then the spring hits the hammer. Therefore, it is possible to open the gas valve near the starting point and hit the piezoelectric element with a hammer near the end point to obtain a spark, which allows a relatively long valve opening time, which is sufficient to expel the air present in the gas burner. After supplying an amount of gas to the gas burner, a spark is generated by the piezoelectric element, and the ignition can be improved.

When the ignition control lever is released from the push operation at the terminal position, the ignition control lever is temporarily locked at the intermediate position, the ignition pilot valve is released from its suppression and closed, and the electromagnetic safety valve can be closed. The state will be as follows.

However, when the ignition pilot burner and the main gas burner are ignited by the above-described operation, the electromagnetic safety valve is held open by the electromotive force of the thermocouple facing the gas burner.

The main gas burner is therefore supplied with gas to connect the combustion. However, in the event that an ignition error occurs, the electromagnetic safety valve will not be held open and will close. Therefore, no gas is supplied to each gas burner.

In this case, by moving the ignition control lever from the intermediate position to the final position again, the ignition pilot valve and electromagnetic safety valve can be pushed open and the piezoelectric element struck with a hammer to generate sparks, which is the aforementioned ignition operation. I can do it.

Furthermore, when the ignition operating lever is temporarily locked in intermediate position B,
The fulcrum of the ignition operating lever is switched to the second position. Therefore, the ignition pilot valve and the electromagnetic safety valve can be suppressed and opened in the same way as when pushing down from the starting position to the final position.

(Example) An example of implementing the present invention will be explained with reference to the attached drawings.

In the drawing, 1 is from the starting position A to the intermediate position B and then to the final position C.
The ignition operating lever 2 is pushed up to and temporarily locked at the intermediate position B. The ignition operating lever 2 has a spring that strikes the hammer 4 against the piezoelectric element 3 in conjunction with the pushing operation of the ignition operating lever 1 from the intermediate position B to the final position C. 5 is a piezoelectric element device that stores energy in the spring 5 and then strikes the piezoelectric element 3 of the hammer 4 with the spring 5; 6 is a valve housing provided with a gas passage 8 connected to a main gas burner 7, etc.; 9 and 1o are the valves; An electromagnetic safety valve and an ignition pilot valve facing the gas passage 8 in the housing 6 are shown, and the electromagnetic safety valve 9 and the ignition pilot valve lO are pressed open only when the ignition operating lever 1 is pressed. The fulcrum 25 of the ignition operating lever 1
is set in the first device a when moving the ignition operating lever 1 from the starting end position A to the ending position C, and in the second position when moving from the intermediate position B to the ending position. To explain in detail, the illustrated ignition system is equipped with gas burners 7.7 in two stages, upper and lower, as shown in Figure 1O, with the lower gas burner serving as the main gas burner 7 for constant fire, and the upper gas burner serving as the main gas burner 7 for switching the capacity. The heater is equipped with a main gas burner 7, a pilot burner 11 for ignition facing the main gas burner 7 for regular fire, and a pilot burner 13 for regular fire facing the thermocouple 12 for keeping the electromagnetic safety valve 9 open. Indicates when to use it. Therefore, the electromagnetic safety valve 9 and the ignition pilot valve 1 (l) are interposed in the valve housing 6 from a position close to the gas port 14 of the valve housing 6 as shown in FIG. The supply to the control valve 15, the main gas valve 1B, and the capacity switching gas burner 7 is switched to O.
The switch valve 17 is equipped with a switch valve 17 that switches between N and OFF, and the valve housing 6 is provided with the normally-fired pilot burner 1 on the downstream side of the electromagnetic safety valve 9.
3, a gas outlet 19 to the ignition pilot burner 11 on the downstream side of the ignition pilot valve IO, and a gas outlet 20 to the regular gas burner 7 on the upstream side of the switching valve 17. , a gas outlet 21 to the capacity switching gas burner 7 is provided on the upstream side of the switching valve 17.

The electromagnetic safety valve 9 is provided on an extension of the valve rod 10a of the ignition pilot valve 10, and the ignition control lever 1
When the ignition pilot valve 10 is pressed open, the electromagnetic safety valve 9 is pressed open by being pushed by the valve rod 10a. To further explain this, the ignition operating lever 1 has an L-shape, with one side serving as an operating piece 1a and the other side serving as an operating piece 1b, with the operating piece 1b being the valve rod 10a side of the ignition pilot valve IO. It is supported by a frame body 22 provided on the front side of the valve housing 6 as shown in FIG. 23 is loosely fitted into a bottle 24 provided on the frame 22, and a bottle 25 provided on the bent portion of the ignition operating lever 1 which also serves as a fulcrum is attached to the bottle 24 provided on the frame 22.
Provided by being fitted and supported in a circular arc groove 26 centered around 4,
The ring piece 23 is opposed to the valve rod 10a to suppress the valve opening. Note that 27 indicates a spring that pulls the ignition operating lever 1 toward the starting end position A side.

The piezoelectric element device 2 is supported by a transparent window 22a provided in the frame body 22 so that the hammer 4 moves along the axis in the moving direction of the bottle 25, and the root portion is attached to the frame body 22 with an axis. A swinging lever 28 is provided with the tip of the support facing the movement trajectory of the hammer 4, and an engagement groove 28 provided in the swinging lever 28 is provided.
The bottle 25 of the ignition operating lever 1 is made to face the position a, so that the hammer 4 is linked to the operation of the ignition operating lever 1.

Thus, when pushing down the ignition operating lever 1 from the starting end position A to the ending position C, the ignition operating lever 1 is pushed down as shown in FIG.
swings as a fulcrum point at the upper end position of the arcuate groove 2B, that is, the m1 position, and as shown in FIG. When the valve rod 10a is pushed completely, the ignition operating lever 1 swings around the contact point between the ring piece 23 and the valve rod 10a. Therefore, the bottle 25 moves downward along the arcuate groove 26,
When the ignition operating lever 1 exceeds the intermediate position B, the tip of the swinging lever 28 engages with the hammer 4, and the subsequent depression of the ignition operating lever 1 causes the hammer 4 to compress the spring and then the piezoelectric The ignition operating lever 1 is moved away from the cord 3.
The swing lever 28 is disengaged from the hammer 4 near the end position C of the swing lever 28 . Therefore, the hammer 4 is repelled by the spring 5 and strikes the piezoelectric cord 3. Therefore, a spark is generated at the electrode of the piezoelectric element 3, and the gas burner is ignited.

When the ignition control lever 1 is released from being depressed at the terminal position C, the ignition pilot valve 10 is released from its suppression and closes, and the electromagnetic safety valve 9 becomes in a state where it can be closed, and the ignition control lever 1 is released. 1 is temporarily locked at intermediate position B.

At this time, the swing lever 28 is locked to the front end of the hammer 4.

Therefore, when pushing down the ignition operating lever 1 from the intermediate position B to the final position C, the bottle 25 of the ignition operating lever 1
first swings around the second device b (shown by chain lines in FIG. 2) whose position is regulated by the swing lever 28, and accordingly the ring piece 23 presses the valve rod 10a to ignite. Press the pilot valve lO and the electromagnetic safety valve 9 to open them, and open the valve rod 1.
At the position where 0a is fully pushed, the ignition operating lever 1 is further swung around the contact position of the ring piece 23 with the valve rod 10a.

Therefore, the swing lever 28 moves the hammer 4 to the spring 5.
An ignition operation can be performed in which the hammer 4 is compressed and separated from the piezoelectric element 3, and then the hammer 4 is struck against the piezoelectric element 3 to generate a spark on the telephone pole.

That is, by moving the bin 25 constituting the fulcrum to the second position, the ignition pilot valve IO and the electromagnetic safety valve are activated when moving from the intermediate position B to the terminal position in the same way as when pushing down from the starting position A to the terminal position C described above. The valve can be opened by pressing 9.

As shown in FIGS. 7 and 8, the ignition operating lever 1 has an auxiliary lever 29 that moves along with the ignition operating lever 1, and a lock pin 30 that temporarily locks the operating lever 1 in the intermediate position B. The auxiliary lever 28 and the lock plate 29 are pivotally supported on the pin 24 into which the ring piece 23 provided on the ignition operating lever 1 is loosely fitted. As shown in the figure, when the bottle 32a interposed in the push piece 32 that presses the main gas valve 16 is operated from the starting end position A of the ignition operating lever 1 to the terminal end position C side, the auxiliary lever 29 is attached to the main gas valve 16. Cam 29 that moves 1B to the valve opening side
The sub-lever 29 is further provided with a protrusion 29b that overlaps a hook 31a provided on the lock plate 31 that engages with the lock pin 30. Further, the lock plate 31 is provided with a claw piece 31b facing the front surface of the auxiliary lever 29 at its front end, so that when the ignition operating lever 1 is moved to the terminal position C side, the lock plate 31 is pushed by the auxiliary lever 29. A tension spring 33 is interposed between the auxiliary lever 29 and the lock plate 31 so that the ignition operating lever 1 moves together.
When applying a force to return the ignition operating lever 1 to the starting end side from the state where it is temporarily locked in the intermediate position B, the ring 28 of the action piece 1b of the ignition operating lever 1 first hits the contact part 29e of the sub lever 29. When the bottle 24 is slightly returned to the starting end position A side, the protrusion 29b engages with the hook 31a.
is pressed against the spring 33 in the direction of separating from the hook portion 31a. As a result, when the bottle 24 comes off from the hook portion 31a, the secondary lever 29 is repelled by the spring 34 which elastically reels the ignition pilot valve 10 toward the valve closing side, and returns to the starting end position A side together with the lock plate 31. did.

The bottle 30 is made by bending a thin metal wire into a U-shape, and has its - side 30a pivoted on the frame 22, and the other side free end 30b is pulled by a spring 42 and inserted into the hook portion 31a. It will be installed so that it can enter the area. The spring 42 has a locking part that bends a metal wire 42a having spring properties into an annular shape so that both ends thereof partially overlap, and also bends both ends of the metal wire 42a inward to engage with the bottle 24. 42b, 42b
It is small and flat.

Reference numeral 35 indicates an L-shaped switching lever for switching the switching piece 17, and 3B indicates a switching lock plate that moves along with the switching lever 35 and locks the switching lever 35 in the switching position. The locking plate 36 has a bent piece 38b that presses the switching valve 17 at one end, and a bent part 38c that engages the pushing piece 35b of the switching lever 35 at the other end. It moves overlapping with the pusher piece 35b and is pivotally supported by the bin 24.

The lock plate 36 has a hook portion 36a that engages with a locking pin 37 similar to the bottle 30 at the switching position, and a bent piece 38b facing the back side of the operating piece 35c. When the lever 35 is swung toward the switching position, the push piece 35b hits the bent piece 36b, and the lock plate 36 moves accordingly, causing the switching lever 3 to return from the switching position to its original position.
5, first push out the bottle 37 that engages with the hook portion 38a with the action piece 35e, and when the bottle 37 is pushed out from the hook portion 36a, the switching lock plate 36 is moved along with the switching lever 35. It now returns to its original position.

In addition, 38 is a spring that pulls the switching lever 35 toward the original position, and 39 is a spring whose root part is supported by the frame 22 and whose tip is interposed between the ring piece 23 and the valve rod 10a, and which is connected to the ignition operating lever. a plate piece for stabilizing the pressing of the valve rod 10a by 1;
Reference numeral 40 denotes a stopper for locking the switching lever 35 in its original position, and a rubber material 41 is attached to the position of the switching lever 35 where it contacts the stopper 40, so as to soften the collision noise generated when the switching lever 35 contacts the stopper 40. I made it.

The spring 27 and the tension spring 38 mentioned above are arranged so that their intermediate portions are brought into contact with the frame body 22 or the switching lever 35 to prevent the spring 27 or 38 from vibrating. Reference numeral 43 indicates a rubber material for absorbing collision sound, which also serves as a stopper and is provided on the frame 22 against which the ignition operating lever 1 comes into contact.

Next, the ignition operation of this device will be explained with reference to FIG.

As is clear from FIG. 9, the ignition operating lever 1 swings over a range of approximately 60 degrees from the starting end position A to the final end position C. When pressing down, the ignition operating lever 1 opens the electromagnetic safety valve 9 via the valve rod 10a of the ignition pilot valve 10 in the position shown in FIG. The ignition pilot valve IO is opened at position C in Fig. 9, the electromagnetic safety valve 9 is pushed fully at position d in Fig. 9, and the main gas valve 16 is opened at position d in Fig. 9. A cam surface 27a provided on the lever 28 keeps it pushed open.

That is, when the ignition control lever 1 is pushed down about 1/4 of its operating range, gas is supplied to the ignition pilot burner 11, the constant flame pilot burner 13, and at least the constant flame main gas burner 7. Then, after passing the intermediate position B shown in FIG. is pushed away from the piezoelectric element 3,
At the position shown in FIG. 9f, the engagement between the swing lever 35 and the hammer 4 is released.

The hammer 4 thus strikes the piezoelectric element 3, producing a spark at the electrode and igniting each burner 11.13.7.

When the ignition operating lever 1 is released from the ignition operating lever 1 at the terminal position C (the position shown only in FIG. 9), the ignition operating lever 1
is locked at an intermediate position by a lock plate 29 and a lock pin. As a result, the ignition pilot valve lO is released from its pressure and is rebound by the spring 34 to return to the closed position, but the electromagnetic safety valve 9 is kept open by the electromotive force of the thermo-lightning pair 12. For this reason, gas continues to be supplied to the normally-fired pilot burner 13 and at least the normally-fired main burner 7 to continue combustion.

However, if ignition does not occur during the ignition operation, no electromotive force will be generated in the thermal lightning pair 12, and therefore the electromagnetic safety valve 9 will not be attracted or held, so the electromagnetic safety valve 9 will be closed.

Therefore, the gas supply to all gas burners 11.13.7 is cut off.

At this time, by pressing down the ignition control lever 1 from the intermediate position B to the terminal position C, the ignition pilot valve 0 and the electromagnetic safety valve 9 are again pressed and opened in the same manner as described above, and the hammer 4 An ignition operation is performed to strike the piezoelectric element 3.

At this time, the ignition operating lever 1 can be operated within a small operating range from the intermediate position B to the terminal position C, and therefore has good operability.

(Effects of the Invention) According to the present invention, the electromagnetic safety valve and the ignition pilot valve interposed in the gas passage connected to the gas burner are linked so as to open only when the ignition operating lever is pressed. The fulcrum of the ignition operating lever can be set at the first position when the ignition operating lever moves from the starting position to the terminal position, and at the second position when moving from the intermediate position to the terminal position. When the ignition control lever is initially pushed from the starting position to the final position, the ignition control lever is operated from the starting position to opening the ignition pilot valve and electromagnetic safety valve until hitting the piezoelectric element with a hammer near the final position to obtain a spark. It is possible to obtain a spark after supplying a sufficient amount of gas to the gas burner to expel the air present in the gas burner, which improves ignition performance. When the ignition pilot burner is released, the ignition pilot burner is closed and the electromagnetic safety valve is in a state where it can be closed. Therefore, in the event that an ignition error occurs and the electromagnetic safety valve is not kept open, there is no risk of fuel gas leaking, and then By re-operating from the intermediate position to the terminal position, the ignition operation can be performed again, and since the operation range is smaller than that of the first time, there are effects such as easier operation.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an example of the implementation of the present invention, Fig. 2 is a right side view thereof, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 4 is a plane taken along the line IV-IV in Fig. 1. 5 is a sectional view taken along line V-V in FIG. 2, FIG. 6 is a left side view, FIG. 7 is an exploded perspective view, and FIG. 8 is an exploded perspective view of a part of the ignition operating lever. FIG. 9 is an explanatory diagram for explaining its operation, FIG. 10 is a diagram showing its usage state, and FIG. 1I is an enlarged front view of a part thereof. l...Ignition operating lever 4...Hammer 9...Electromagnetic safety valve 3...Piezoelectric cord 5...Spring 10...Ignition pilot valve Fig. 3 Fig. 4 Fig. 10 Fig. 9

Claims (1)

[Claims] an ignition operating lever that is pushed from a starting position to an intermediate position and then to a terminal position, and is temporarily locked at the intermediate position;
In conjunction with the pushing operation of the ignition operating lever from the intermediate position to the terminal position, energy is stored in a spring that strikes the piezoelectric element with a hammer, and then the spring causes the hammer to strike the piezoelectric element. In this process, an electromagnetic safety valve and an ignition pilot valve, which are interposed in a gas passage connected to a gas burner, are linked so that the valves are pressed open only when the ignition operating lever is pressed, and the fulcrum of the ignition operating lever is The ignition control lever can be set to a first position when moving from a starting end position to a terminal position and a second position when moving from an intermediate position to a terminal position, and the fulcrum can be set to a second position when moving beyond the second position. An ignition device configured to accumulate energy in a spring that interlocks with each other to strike a hammer against the piezoelectric element, and then cause the spring to strike the hammer against the piezoelectric element.