JPH0139010B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a control device for a combustor used in a stove, water heater, etc.

(b) Prior art As an example of a system in which fuel is supplied to a burner by driving a valve shaft in the axial direction,
No. 148949, in which an ignition valve that opens and closes the fuel flow path to the pilot burner for ignition is provided in the middle of the valve stem that opens the electromagnetic safety valve; At the same time, the ignition valve section becomes long because it also opens and closes the shutoff valve by itself.

(c) Problems to be Solved by the Invention The present invention aims to reduce the size of a valve in which a pilot valve portion for opening and closing a pilot flow path is provided in the middle of a valve shaft.

(d) Means for Solving the Problems The present invention houses a solenoid valve in a valve body, and provides a main valve shaft on the same axis as the valve shaft of the solenoid valve, which also performs the opening operation of the valve shaft. A main valve is attached to the main valve shaft, and a nozzle is connected downstream of the main valve hole which is opened and closed by the main valve via a regulating valve for controlling the thermal power.
Further, a sub-valve shaft is provided adjacent to and in parallel with the main valve shaft, and a sub-valve for opening and closing a bypass flow path that bypasses the regulating valve is installed on this sub-valve shaft, and at an appropriate position on this sub-valve shaft, It is integrally provided with a pilot valve portion that opens and closes a pilot flow path connected to a pilot burner branched from the downstream side of the main valve hole.

(e) Function During ignition operation, by operating the main valve shaft and the auxiliary valve shaft at the same time, the main valve shaft opens the solenoid valve and the main valve, and the auxiliary valve shaft opens the auxiliary valve and the pilot valve. At the same time, gas is supplied to the nozzle through the solenoid valve, main valve hole, and sub valve hole, and at the same time, gas is supplied to the pilot burner through the main valve hole and the pilot flow path.

By providing the pilot valve portion on the sub-valve shaft, the length of the main valve shaft can be shortened, thereby making it possible to downsize the valve body.

(F) Example First, we will explain the first example of the present invention using a gas stove as an example.
To explain based on the figure, 1 is a table body of a gas stove with a grill, stove burners 3 are arranged on the left and right sides of the top surface 2, and a grill 4 is installed inside between the stove burners. A grill door 5 is attached to the front of this grill, and a set of knobs 7, 7 for igniting and extinguishing the burners 3, 3 for the stove and for igniting and extinguishing the grill burners (not shown) are provided on the front 6. , 7 are installed.

Next, FIG. 2 shows a valve body operated by the knob set 7, in which the valve base 8 is provided with a valve hole 11 that is opened and closed by the valve body 10 of the solenoid valve 9, and a main valve that is opened and closed by the main valve 12 downstream of the valve hole 11 is provided in the valve base 8. A main gas flow path in which a valve hole 13 is continuously provided, and a regulating valve hole 15 that is throttled by a regulating valve 14 for adjusting thermal power is consecutively provided downstream of the main valve hole, and the downstream thereof is communicated with a main gas nozzle 16. 17 is integrally molded, and a bypass flow path 20 is provided in parallel with the regulating valve hole 15 of this main gas flow path, which bypasses this and is provided with a sub-valve hole 19 which is opened and closed by a sub-valve 18 in the middle. A storage chamber 22 is formed on the upstream side of the valve hole 11 and has a gas inflow hole 21 connected to a gas source in its side wall.

The valve shaft 10' of the electromagnetic valve 9 is disposed on the same axis as the main valve shaft 23 to which the main valve 12 is fixed, and these are driven in the longitudinal direction with respect to the table body 1. Further, the sub-valve shaft 24 to which the sub-valve 18 is fixed is attached to the main valve shaft 23.
A pilot valve section 25 is disposed above and parallel to the valve base 8, with a front end portion 24' projecting from the valve base 8, and a pilot valve section 25 between the auxiliary valve 18 and the front end portion 24'.

The pilot valve portion 25 has a small diameter portion 26 on the sub-valve shaft 24, and a pilot passage 28 connected to the pilot burner 27 is provided around the small diameter portion.
This pilot flow path communicates between the main valve hole 13 of the main gas flow path 17 and the sub-valve hole 19 via a shaft hole 29 provided around the sub-valve shaft 24, and the sub-valve 18 of the sub-valve shaft 24 is opened. During operation, the shaft hole 29 is located within the narrow diameter portion 26, so that the main gas passage 17 and the pilot passage 28 communicate with each other. The pilot valve portion 25 is also provided with a seal ring 30 for preventing gas leakage and a seal ring 31 for closing the pilot flow path 28.

Reference numeral 32 denotes a lever set attached to the front surface of the valve base 8, which mainly opens and closes the main valve shaft 23 and the auxiliary valve shaft 24; It mainly consists of a guide plate 35 which is screwed to face each other with an appropriate interval 34, and a resin frame plate 36 which is screwed to the front of the guide plate. The ignition button 37 and extinguishing button 38 of the knob set 7 are pivotally connected to the frame plate in parallel to the left and right by pivot pins 39, and the adjusting valve is slightly above the igniting button 37 and the extinguishing button 38. An adjustment knob 41 is attached to operate a control lever 40 that rotates the control lever 14.

On the other hand, as shown in FIG. 3, a support plate 42 is fixed to the guide plate 35 between the guide plate 35 and the buttons 37 and 38, and the ignition button 37 is driven by the support plate and the guide plate 35. It slidably supports a drive lever 43 that drives the main valve shaft 23 and the auxiliary valve shaft 24, and also slidably supports a release lever 44 that is driven by the fire extinguishing button 38.
Therefore, the front end 2 of the main valve shaft 23 is attached to the drive lever.
3' and a contact part 45 that presses the front end 24' of the auxiliary valve shaft 24 are integrally bent. (not shown) actuate the lever 47 of the actuating switch 46. Note that the front end 2 of the main valve shaft 23
3' is positioned opposite to the abutting portion 45 and protrudes from the valve base 8, and protrudes further forward than the front end 24' of the auxiliary valve shaft 24 in order to open and set the valve body 10 of the solenoid valve 9. .

Reference numeral 48 denotes a lock lever which is rotationally driven by the release lever 44, and has the drive lever 43 at one end.
has a hook portion 49 that engages with the abutting portion 45 when the main valve 12 is pushed to the open position, and holds the drive lever 43 in the open position of the main valve 12. In this open position of the main valve, the abutting portion 45 is slightly separated from the front end 24' of the sub-valve shaft 24, so that the sub-valve 18 is closed. Furthermore, the other end 5 of the lock lever 48
0 is located opposite the tip 44' of the release lever 44, and when the extinguishing button 38 is pressed down, the tip 44' of the release lever 44 locks the other end 5 of the lock lever 48.
0 to rotate the lock lever 48 and release the engagement between the hook portion 49 and the abutment portion 45.

51 has one end 52 pivoted on a support shaft 53 above between the base plate 33 and the guide plate 35, and the other end 54.
ignition button 37 and adjustment knob 41 on the frame plate 36.
The display board has a display part 56 facing the inside of a window hole 55 located in between, and the top and bottom of the display part face the window hole 55 alternately depending on the position of the ignition button 37.

FIG. 2 shows the burner extinguishing state of the valve body, and the valve hole 11, main valve hole 13, auxiliary valve hole 19, pilot passage 28 are connected to the valve body 10, main valve 12, auxiliary valve 18,
The drive lever 43 is in the chain line position in FIG. 3, and its contact portion 45 is not engaged with the hook portion 49 of the lock lever 48. Then, when the ignition button 37 is pressed down to the predetermined position shown in FIG.
At the same time, the main valve hole 13, the sub valve hole 19, and the pilot flow path 28 are opened and set by sliding the main valve shaft 23 and the sub valve shaft 24 in the axial direction through the solenoid valve 9. Gas is supplied to the main gas nozzle 16 and the pilot burner 27, and ignited by a spark plug (not shown). At this time, by opening the sub-valve 18, a predetermined maximum flow rate of gas is supplied to the main gas nozzle 16 through the sub-valve hole 19 regardless of the opening degree of the regulating valve hole 15, thereby ensuring the ignition performance of the burner.

Next, when the ignition of the burner is visually confirmed and the depression of the ignition button 37 is released, the hook portion 49 of the lock lever 48 is brought into contact with the contact portion 4 as shown in FIG.
5, and as shown in FIG.
3 is stopped midway to maintain the main valve shaft 23 in an open state. As a result, the valve element 10 of the solenoid valve 9 is supplied with electric power from a thermocouple or the like that detects the ignition of the burner, and is held open, and the main valve 12 is also opened, while the abutment part 45 is connected to the front end 24 of the sub-valve shaft 24. ', and close the sub-valve hole 19 and the pilot flow path 28. By rotating the control lever 40 using the adjustment knob 41 to operate the adjustment valve 14 and adjusting the opening degree of the adjustment valve hole 15, the thermal power of the burner can be arbitrarily changed.

(G) Effects of the Invention With the configuration of the present invention, the pilot valve part can be configured to be small, reducing costs by making the valve smaller and making it easier to secure the installation space for the valve. A display member that displays the operating state of the operating lever can be disposed between the operating levers that operate the operating lever.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a gas stove equipped with the control device of the present invention, Fig. 2 is a side longitudinal sectional view of the valve body, Fig. 3 is a plan view of the main part, and Figs. 4 and 5 are the same. FIG. 3 is a side vertical cross-sectional view of the valve body for explaining the operation. 9...Solenoid valve, 12...Main valve, 14...Adjusting valve, 16...Main gas nozzle, 18...Sub-valve, 24
... Sub-valve shaft, 25 ... Pilot valve part, 27 ...
Pilot burner, 28... Pilot flow path.

Claims (1)

[Claims] 1. A solenoid valve is housed in the valve body, and a main valve shaft is provided on the same axis as the valve shaft of the solenoid valve, which also performs the opening operation of the valve shaft, and the main valve is mounted on the main valve shaft, and A nozzle is communicated downstream of the main valve hole which is opened and closed by the main valve via a regulating valve for controlling the thermal power, and an auxiliary valve shaft is provided adjacent to and parallel to the main valve shaft. is equipped with an auxiliary valve that opens and closes a bypass flow path that bypasses the above-mentioned regulating valve, and a pilot valve section that opens and closes a pilot flow path that is connected to a pilot burner branched from the downstream of the main valve hole is installed at an appropriate location on the auxiliary valve shaft. A combustor control device that is integrated with a combustor.