JPH05306815A - Combustion control device - Google Patents

Abstract

PURPOSE:To operate two needle valves with one common throttle lever in a simple structure. CONSTITUTION:A valve casing 3 has therein a gas passage 4 communicating to a burner 1a of a large volume and a gas passage 5 communicating with a burner 1b of a small volume. A first needle valve 10 is provided in a gas passage 7 communicating with the burner 1a of a large volume while a second needle valve 11 is provided in a gas passage 9 communicating to the burner 1b of a small volume, and both the needle valves 10, 11 are operated by one common throttle lever 13. A cam plate 14 is provided in such a manner that one of its end portions is supported in an intermediate position of both the gas passages of the valve casing 3. Cam grooves 15, 16 with which pins p1, p2 projecting from the needle valves 10, 11, respectively, are provided on the cam plate 14, and the cam plate 14 is engaged with the throttle lever 13 to be swingingly operated.

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 such as a gas table having a large capacity burner and a small capacity burner.

[0002]

2. Description of the Related Art Conventionally, a large-capacity burner and a small-capacity burner are combined to form a double burner, and a valve casing is provided with a gas passage connected to the large-capacity burner and a gas passage connected to the small-capacity burner. A gas table in which a first needle valve is provided in a gas passage communicating with a large capacity burner, a second needle valve is provided in a gas passage communicating with a small capacity burner, and both needle valves are operated by a common throttle lever. Japanese Patent Application Laid-Open No. 1-142319 discloses a combustion control device of
This combustion control device includes a guide plate having a guide groove for guiding a pin protruding from each needle valve, and a cam plate having a cam groove engaged with each pin provided along the guide plate,
Each needle valve is operated by sliding the cam plate with a throttle lever.

[0003]

As described above, the conventional combustion control device requires the provision of the guide plate and the cam plate, which complicates the structure and slides the cam plate having the cam groove. Since it is a thing, there is a problem that the movement becomes unstable.
The combustion control device according to the first aspect is made to solve such a problem. Further, if the needle valve is throttled by the throttle lever and an attempt is made to ignite a small amount of gas, it is difficult to ignite smoothly. Therefore, the amount of gas is increased at the time of ignition to perform the ignition operation. Claim 2
It is an object of the above-described combustion control device that the amount of gas at the time of ignition can be easily increased by the combustion control device according to the first aspect.

[0004]

In order to achieve the above-mentioned object, a combustion control device according to a first aspect of the present invention is a dual burner comprising a combination of a large capacity burner and a small capacity burner.
A gas passage connected to a large capacity burner and a gas passage connected to a small capacity burner are provided in the valve casing, a first needle valve is provided in the gas passage connected to the large capacity burner, and a gas passage connected to a small capacity burner is provided. A second needle valve is provided, and both needle valves are operated by a common single throttle lever. A cam plate, one end of which is axially supported, is provided at an intermediate position of both gas passages of the valve casing. The cam plate is provided with each cam groove with which a pin projecting from each needle valve is engaged, and the cam plate is engaged with the throttle lever to be rocked.

In order to achieve the above-mentioned object, a combustion control device according to a second aspect of the present invention is a dual burner in which a large-capacity burner and a small-capacity burner are combined. A gas passage connected to the burner having a small capacity and a gas passage connected to the burner having a small capacity;
A needle valve is provided and a second needle valve is provided in a gas passage connected to a small-capacity burner, and both needle valves are operated by a common throttle lever. A cam plate is provided with one end pivotally supported at an intermediate position, a pin protruding from each needle valve is engaged with a cam groove provided on the cam plate, and the cam plate is engaged with the throttle lever to perform a swing operation. In addition, an on-off valve is provided in the gas passage on the upstream side of both needle valves of the valve casing,
The on-off valve is opened in conjunction with the ignition operation of the ignition operation button, and when the cam plate is in the throttle position of the second needle valve, the cam plate is opened at the ignition operation of the ignition operation button. It is characterized in that it is provided on a push piece ignition operation button for swinging the two-needle valve to the open side.

[0006]

According to the combustion control device of the present invention having the above construction, when the throttle lever is operated, the cam plate swings about the shaft, and accordingly, each needle valve causes each cam groove to move. Along which the amount of each gas supplied to the large capacity burner and the small capacity burner is adjusted.

According to another aspect of the combustion control device of the present invention, when the second needle valve is in the throttle position when the opening / closing valve is opened in association with the ignition operation of the ignition operation button, the ignition is performed. The cam plate is pushed by the push piece provided on the operation button, and the cam plate is swung to the side where the second needle valve is opened, and the throttle lever is also swung to the side where it is opened. Therefore, when the second needle valve is in the throttle position, if the ignition operation button is operated, the second needle valve and the throttle lever can be easily positioned on the opening side of the second needle valve via the cam plate. The amount of gas supplied to the small capacity burner can be increased.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the embodiments shown in FIGS. In the drawing, 1 is a dual burner formed by combining a large-capacity burner 1a and a small-capacity burner 1b, and 2 is a combustion control device for controlling the fuel supplied to each burner 1a, 1b. In the valve casing 3 that constitutes the
7 and a gas passage 9 connected to the upstream side of the valve casing 7. The respective gas passages 6, 7, 9 are provided in the valve casing 3 in parallel with each other. The gas passages 6 and 7 are provided with the first and second needle valves 10 and 11, and the gas passage 9 is provided with the opening / closing valve 12. Reference numeral 8 denotes a gas inlet provided in the gas passage 9. Reference numeral 13 denotes a throttle lever, and 14 denotes a cam plate operated by the throttle lever 13. The cam plate 14 has a fan shape and is a portion corresponding to the corner of the fan, and both gas passages 6 provided in the valve housing 3 are provided. , 7, which are pivotally supported at intermediate positions, and which are pin p1 projecting from the needle valves 10 and 11 on the portions of the cam plate 14 that contact both sides of the fan-shaped blade.
Cam grooves 15 and 16 to be engaged with p2 are provided separately, and valve holes 6a are provided in the gas passages 6 and 7 of the first and second needle valves 10 and 11 in accordance with the operation amount of the throttle lever 13. 7a
The position of the burner is adjusted so that the fuel supplied to each burner 1a, 1b can be controlled.

The cam groove 15 is formed by the shaft 14 of the cam plate 14.
The cam groove 16 is composed of a circular arc portion 15a centering on e and a substantially straight line portion 15b following the circular arc portion 15a. It consists of a circular arc portion 16b following the portion 16a.

The throttle lever 13 has a valve casing 3 at one end.
The cam plate 14 that is pivotally supported on the upper surface of the cam plate 14 and that is operated by the cam plate 14 is pivotally supported at one end thereof on the side surface of the valve casing 3, and the projection 14a protruding from the cam plate 14 is provided on the throttle lever 13. By inserting and engaging with the provided hole 13a, the cam plate 14
Is swung around the shaft 14e along with the diaphragm lever 13. To explain its operation, the diaphragm lever 1
3 is moved from the position shown in FIG. 11d to the position side shown in FIG. 11a, first, the inclined portion 16a of the cam plate 14 is moved.
The needle valve 11 is gradually opened by the engagement of the pin p2 with the pin p2 to increase the fuel supplied to the small capacity burner 1b. At this time, since the pin p1 engages with the circular arc portion 15a of the cam groove 15, the needle valve 10 does not move and the fuel supplied to the large capacity burner 1a does not change. Next, when p1 comes into a state of engaging with the inclined portion 15b of the cam plate 14, the needle valve 10 is gradually opened to increase the fuel supplied to the large capacity burner 1a.
At this time, the pin p2 is brought into engagement with the circular arc portion 16b of the cam groove 16, so that the needle valve 11 does not move and the fuel supplied to the small capacity burner 1b does not change.

The first needle valve 10 is, as shown in FIG. 4, an orifice 10a for setting a minimum throttle amount, a valve hole 6a of the gas passage 6 and a throttle portion 10b for restricting a flow rate between the first needle valve 10. And a cutoff portion 10c for cutting off the supply of fuel to the large capacity burner 1a in cooperation with the gas passage 6, and the second needle valve 11 has an orifice 11a for setting the minimum throttle amount. And the valve hole 7 of the gas passage 7
throttle portion 11 that throttles the flow rate between a and the second needle valve 11.
It is equipped with b.

Reference numeral 17 denotes a resin guide cylinder provided on the valve housing 3, and 1
Reference numeral 9 denotes a resin-made ignition push button slidably inserted in the guide cylinder 17, and the opening / closing valve 12 is opened by pressing the ignition push button 19 from a start end position A to an end position B. And the electromotive force of the thermocouple 20 opened by pressing the ignition push button 19 from the starting end position A to the end position B and facing the flame outlet of the small capacity burner 1b. The main valve 12a is inserted through the gas passage 9 and the end portion thereof is pushed by the push button 1
9, the main valve 12a is opened when the valve rod 21 is pushed by the ignition push button 19, and the electromagnetic safety valve 12b is also pushed by the tip of the valve rod 21. I was allowed to.

Reference numeral 22 is a spring for returning the ignition push button 19 to the return spring 2.
After pushing from the starting end position A to the end position B against 3 and releasing the pushing, the ignition push button 19 is locked at the intermediate position C and the ignition push button 19 is pushed again to the release position D. At this time, the locking at the intermediate position C is released, and the return spring 23
3 shows a locking mechanism that is urged to return the push button 19 to the starting end position A. The locking mechanism 22 includes a cam piece 25 provided with a cam groove 24 provided on the push button 19, and a lateral portion having a root portion swingably supported by the resin guide tube 17 and a tip end provided on the guide tube 17. The engaging element 26 is engaged with the cam groove 24 via the groove 17a in the direction, and the engaging element 26 is a whisker spring 18 so that the tip of the engaging element 26 contacts the bottom surface of the cam groove 24.

As shown in FIG. 6, the cam groove 24 has points A, B, C and D corresponding to the starting, ending, and intermediate positions A, B, C of the push button 19 and the releasing position D. The first to third groove portions 24a, 24b, 24c each having a stepped shape connecting the push button 19 and the fourth groove portion 24d connecting the two points A and B are formed in a loop shape, and the push button 19 has a starting end position A to an end position. B
Is pressed against the cam piece 25, the engagement member 26
The relative movement of the engaging member 26 from the point A to the first groove portion 24.
When the return spring 23 moves from the terminal position B to the point B via a, the engaging element 26 moves to the point C corresponding to the intermediate position C via the second groove 24b. And is locked at the intermediate position C. Then, when the push button 19 is pushed again, the engaging element 26 is moved to the third groove 24c.
When the engaging element 26 is moved to a two-point corresponding to the release position D via and then released from the pressing, the engaging element 26 returns to the starting end position A via the fourth groove portion 24d by the elastic force of the return spring 23. When the ignition push button 19 is pressed against the return spring 23 from the start end position A to the end position B, the main valve 12a is pressed and opened before the intermediate position C and the electromagnetic safety valve is opened near the end position B. 12b is opened by pressing and the switch S interposed in the operating circuit of the igniter (not shown) is closed, the pressing operation is released at the end position B, and the electromagnetic safety valve 12b is released when it is locked at the intermediate position. The main valve 12a is kept open. Then, when the locking at the intermediate position C is released by the re-pushing operation to return to the starting end position A, the opening holding of the main valve 12a is released. Therefore, the main valve 12a is closed.

The releasing position D is provided closer to the starting end position A than the ending position B so that the switch S is not operated when the pushing operation is performed again.

It should be noted that the cam plate 14 is provided with a spring plate 27 having a narrow abutment piece 14c in the middle of the transparent window 14b along the swinging direction and a projection 27a engaging with the corresponding piece 14c. 14 is supported by a shaft 14e common to the spring 14 and the spring plate 27.
And a piece 14c form a knock mechanism, and when the cam plate 14 starts to open the first needle valve 10 following the second needle valve 11, or the cam plate 14 starts the first needle valve 10 and then the second needle valve 10. At any time when the closing of 11 is started, resistance is given to the operation of the throttle lever 13 to make the operator aware of the transition from the switching of one of the needle valves 10 and 11 to the switching of the other.

Thus, the cam plate 1 which interlocks with the aperture lever 13
When No. 4 is in the throttle position of the second needle valve 11, the second needle valve 11 is operated to be opened by the pressing operation of the push button 19 from the start end position A to the end position B. ..

In the illustrated example, the push button 1 is attached to the cam plate 14.
9 is provided with a receiving piece 14d that faces the movement path of the pushing piece 19a, and when the receiving piece 14d is pushed by the pushing piece 19a, the cam plate 14 swings to open the second needle valve 11 side. To be operated.

When the electromagnetic safety valve 12b is attached to the gas passage 9, it is inserted and attached in a resin cylinder 28 as shown in FIG. The cylinder 28 has a valve rod 21 at one end.
Is provided with a small hole 28a for inserting the valve rod 21 through the small hole 28a so that the tip of the valve rod 21 faces the electromagnetic safety valve 12b. A spring seat 2 provided on the valve rod 21 is provided with a locking piece 21a so that the valve rod 21 does not come out of the small hole 28a.
A spring 29 is stretched between 1b and the end of the tubular body 28 so that the spring 29 can be assembled. Reference numeral 28b denotes a hole provided on the side surface of the cylindrical body 28. When the cylindrical body 28 is attached to the gas passage 9, the hole 28b overlaps the gas inlet 8 so that the gas passes through the cylindrical body 28 and a small hole 28e. Gas is supplied to the upstream side of the main valve 12a via the.

Reference numeral 28c is an electromagnetic safety valve 1 provided on the cylindrical body 28.
2b is a valve seat, and 28d is an O-ring provided on the outer circumference of the cylindrical body 28.

Next, the operation of this device will be described. 9a of FIG.
When the diaphragm lever 13 is positioned at the position shown by, the cam plate 1
4 is in the position shown in FIG. 11a, which results in the first,
The second needle valves 10 and 11 are both gas passages 6 and 7
Keep it in the most open position. As a result, the maximum amount of fuel is supplied to the large capacity burner 1a and the small capacity burner 1b as shown in FIG. Next, when the throttle lever 13 is moved to the position shown in FIG. 9b, the cam plate 14 moves to the position shown in FIG. 11b, and the second needle valve 11 is in the most opened state as shown in FIG. 10b. While the maximum amount of fuel is supplied by the small capacity burner 1b, the first needle valve 10 restricts the gas passage 6 at its throttle portion 10b to supply the fuel supplied to the large capacity burner 1a with the orifice 10a. Also, the state is limited to the amount flowing through the gap between the valve hole 6a and the first flow control valve 10.

Then, the diaphragm lever 1 is moved to the position indicated by c in FIG.
3 is moved, the cam plate 14 moves to the position shown in FIG. 11c, and as shown in FIG. 10c, the second needle valve 1
No. 1 is in the most opened state and the maximum amount of fuel is supplied to the small capacity burner 1b.
Closes the gas passage 6 with the blocking portion 10c. Therefore, the fuel supplied to the large capacity burner 1a is cut off.

Then, the diaphragm lever 1 is moved to the position indicated by d in FIG.
When 3 is moved, the cam plate 14 moves to the position shown by the solid line of d in FIG. 11, and the gas passage 7 is throttled by the second needle valve 11 as shown in d of FIG.
The fuel supplied to the small-capacity burner 1b via 1a is in a limited state.

In this state, the fuel supplied to the large-capacity burner 1a remains off. Next, the ignition operation of the present device will be described. When the ignition push button 19 is pressed against the return spring 23 from the start end position A to the end position B, the main valve 12a is pressed and opened before the intermediate position C. The valve is opened, the electromagnetic safety valve 12b is pressed and opened near the terminal position B, and the switch S interposed in the operating circuit of the igniter (not shown) is closed. At any position of the throttle lever 13, fuel is supplied to at least the small-capacity burner 1b, and a spark from an igniter (not shown) acts on it to ignite it. Next, if the pushing of the ignition push button 19 is released, the ignition push button 19 is repelled by the return spring 23 to return the main valve 12a to the open state by the locking mechanism 22 while returning to the starting end position A side. It is locked in the intermediate position C where it is kept.

In order to extinguish the fire, if the ignition push button 19 is pushed again, the ignition push button 19 is released from its engagement and returns to the starting end position A, whereby the main valve 12a is closed. This is done by cutting off the gas supply.

When the throttle lever 13 is in the position shown in FIG. 9d and the cam plate 14 is in the position shown in FIG. 11d, the second needle valve 11 moves to the gas position as shown in FIG. 10d. The fuel is supplied to the small-capacity burner 1b in a restricted state through the orifice 11a provided in the passage 6 which is narrowed. In this limited state, the electromotive force of the thermocouple is rapidly increased, the electromagnetic safety valve 12b is quickly opened and held, and the fuel is insufficient for good ignition.

Therefore, when the aperture lever 13 is in this state, the push piece 19a is operated when the push button 19 is ignited, that is, when the push button 19 is pushed from the start end position A to the end position B.
Pushes the contact piece 14d provided on the cam plate 14 to switch the cam plate 14 from the position shown in d of FIG. 11 to the position of C in FIG.
The second needle valve 11 is switched to the most open state. By doing so, ignition can be performed with the maximum gas amount always supplied to the small-capacity burner 1b.

In this embodiment, when the gas passage 6 is throttled by the second needle valve 11 during ignition, the second needle valve 11 is switched to the most open state to perform ignition. It is sufficient that a minimum amount of gas for good ignition is supplied to the small-capacity burner 1b, and in this embodiment, the position is only the state in which the second needle valve 11 is opened most. After the ignition operation, the second needle valve 11 is kept in the most opened state of the ignition operation. Therefore, in order to bring the fuel supplied to the small capacity burner 1b after ignition to a limited state, the throttle lever 13 may be returned to the position shown by D in FIG.

Although the ignition push button 19 continues combustion in the intermediate position C where the main valve 12a is held open,
At this time, the pushing piece 19a is, as shown in FIG. 11d, the cam plate 1 when the fuel of the small capacity burner 1b is most throttled.
It is located closer to the starting end position A than the position of the fourth hitting piece 14d. That is, when the throttle lever 13 is operated during combustion to adjust the heat power, the contact piece 14d of the cam plate 14 does not come into contact with the push piece 19a.

Therefore, the pushing piece 19a is the contact piece 14 only at the time of ignition.
Although strong ignition is performed by pressing d, the provision of this function does not adversely affect the throttling operation in use.

Further, in the above embodiment, the sliding direction of the first and second needle valves 10 and 11 is the same as the sliding direction of the ignition push button, but it does not necessarily have to be the same direction, for example, the vertical direction. But good.

[0032]

The combustion control device according to the first aspect of the present invention having the above structure has the following effects. Two cam valves can be operated with one cam plate, and the number of parts can be reduced. Moreover, each cam plate is axially supported at a position sandwiched between two gas passages, and each needle valve for operating each needle valve that engages with the cam groove of the cam plate by the rotational movement of the cam plate. It is possible to obtain a combustion control device that allows the valve to slide smoothly and has an extremely comfortable operation feeling.

The combustion control device having the above-mentioned structure has the following effects. When the main valve is opened in conjunction with the ignition operation of the ignition operation button, if the second needle valve is in the throttle position, the push plate provided on the ignition operation button opens the cam plate on the side where the second needle valve opens. And simultaneously swing the aperture lever to the open side. Therefore the second
If the ignition operation button is operated when the needle valve is in the throttle position, the second needle valve and throttle lever are always positioned on the opening side of the second needle valve via the cam plate, and the increased gas amount It enables a smooth ignition. The structure is extremely simple and can be obtained at low cost.

[Brief description of drawings]

FIG. 1 is a plan view of an example of implementing the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a right side view of FIG.

FIG. 4 is a sectional view taken along the line AA of FIG.

FIG. 5 is a perspective view of the locking mechanism section.

FIG. 6 is an enlarged view of a cam piece of the locking mechanism section.

FIG. 7 is a cutaway exploded view of a cam piece of a locking mechanism section.

FIG. 8 is a cutaway side view of a sheath body for assembling the electromagnetic safety valve and the valve rod.

FIG. 9 is a diagram for explaining the operation of an operator.

FIG. 10 is a view for explaining the operation of the needle valve.

FIG. 11 is a diagram for explaining the operation of the cam plate.

FIG. 12 is a diagram showing operating characteristics.

[Explanation of symbols]

1 burner 1 3 valve housing 4
Gas outlet 5 Gas outlet 6 Gas passage 7
Gas passage 8 Gas inlet 9 Gas passage 10
First needle valve 11 Second needle valve 12 Open / close valve 13
Aperture lever 14 Cam plate

Claims (2)

[Claims] 1. A dual burner comprising a combination of a large capacity burner and a small capacity burner, wherein a valve casing is provided with a gas passage communicating with the large capacity burner and a gas passage communicating with the small capacity burner. A first needle valve is provided in the gas passage leading to the large-capacity burner, a second needle valve is provided in the gas passage leading to the small-capacity burner, and both needle valves are operated by a common throttle lever. In the valve housing, a cam plate whose one end is axially supported is provided at an intermediate position of both gas passages of the valve casing, and each cam groove is formed in the cam plate so that a pin protruding from each needle valve engages with the cam plate. A combustion control device characterized in that the combustion control device is adapted to be engaged with a throttle lever to be rocked. 2. A dual burner comprising a combination of a large capacity burner and a small capacity burner, wherein a valve casing is provided with a gas passage communicating with the large capacity burner and a gas passage communicating with the small capacity burner. A first needle valve is provided in the gas passage leading to the large-capacity burner, a second needle valve is provided in the gas passage leading to the small-capacity burner, and both needle valves are operated by a common throttle lever. In this case, a cam plate whose one end is axially supported is provided at an intermediate position between both gas passages of the valve casing, and each cam groove is provided in the cam plate so that a pin protruding from each needle valve engages with the cam plate. The throttle lever is engaged for rocking operation, and an opening / closing valve is provided in the gas passage on the upstream side of both needle valves of the valve casing, and the opening / closing valve is interlocked with the ignition operation of the ignition operation button. To open the valve When the cam plate is in the throttle position of the second needle valve, a push piece for swinging the cam plate toward the opening side of the second needle valve when the ignition operation button is operated is provided on the ignition operation button. Combustion control device.