JPH0325210A - Control device for gas burner - Google Patents

Abstract

PURPOSE:To prevent the increase of the cost of a source circuit by a method wherein when drive control is made on a plurality of gas flow rate regulating means, the gas flow rate regulating means are orderly driven in the order of priority, set by a priority order set means, from the high order of priority. CONSTITUTION:A plurality of gas flow rate regulating means A, a drive control part B, and order of priority set means C and D are provided with a drive control part D. When simultaneous drive control is made on the plurality of the gas flow rate regulating means A, the solenoid valves and the motors of the gas flow rate regulating means A are driven orderly one by one according to the preset order of priority. Thus, in a gas device having a plurality of burners like a gas table provided with, for example, two hot plate part and a grill, a plurality of the burners is not simultaneously regulated, and a high capacity power source is eliminated. This constitution prevents the increase of the cost of a source circuit, and enables provision of a gas device, having a plurality of the burners, at a lost cost.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a burner control device for various gas appliances equipped with a plurality of burners.

Conventional technology> Gas flow rate adjustment mechanisms for electronically controlled gas cooking sweets, etc. include: (a) a proportional solenoid valve that continuously changes the flow rate; and (b) a plurality of gas solenoid valves that adjust the gas flow rate. A type in which the passages are connected in parallel, each gas passage is provided with a gas restriction mechanism such as an orifice with a different degree of opening, and the flow rate is changed in stages by the combination of gas solenoid valves that are opened (C) by a motor There are known types that continuously change the flow rate by rotating the closure. In case (a) above, a driving current constantly flows through the proportional solenoid valve during operation, and in case (C), driving current flows through the motor only when adjusting the flow rate, and a particularly large current flows in the initial stage of driving. In addition, in (b), a large current flows when the W&magnetic valve is engaged, and once the valve is opened, in a stable state, the power supply voltage and drive current are generally lowered to reduce power consumption.

<Problem to be solved by the invention> For example, a typical gas stove with two stoves and one grill has three burners, and when they are used at the same time, the control There are also three target gas flow rate adjustment mechanisms. For this reason, the capacity of the drive power source is also required to be three times that of the case with one burner, but in the method (b) or (C) above, in which a large current flows when the valve is opened or at the beginning of the drive, the flow rate cannot be adjusted. A particularly large-capacity power supply was required in case both operations were to be performed at the same time, which increased the cost of the power supply circuit and was a major factor in pushing up the overall price of the stove. The present invention has focused on this point and has been made for the purpose of preventing an increase in the cost of the power supply circuit by preventing flow rate adjustments from being performed simultaneously.

Means for Solving the Problems> In order to achieve the above object, the present invention provides a burner control device for an electronically controlled gas appliance. a gas flow rate adjustment means, a drive operation section for each gas flow rate adjustment means, a priority order setting means for setting in advance a priority order for driving the gas flow rate adjustment means;
and a drive control section that sequentially drives the gas flow rate adjusting means in order of priority set by the priority setting means when the plurality of gas flow rate adjusting means are driven by the dynamic operation section.

FIG. 1 is a diagram showing the configuration of the present invention, where A is a plurality of gas flow rate adjusting means, B is a drive operation section, C is a priority setting means, and D is a drive control section.

Even if a plurality of gas flow rate adjustment means A are driven at the same time, the solenoid valves and motors of the gas flow rate adjustment means A are sequentially driven one by one according to preset priorities. Therefore, two or more gas flow rate adjusting means A are not driven at the same time and a large burden is not placed on the source, and an increase in cost of the power supply circuit due to enlargement or the like can be avoided.

Practical example〉? An embodiment shown in FIG. 1 will be described. The embodiment is an example in which the present invention is applied to a table stove of the method (c) above in which the gas flow rate is controlled by a motor. Fig. 2 is a schematic configuration diagram, and Fig. 3 is a block diagram of the control circuit. be.

In Figure 2, 1 is the stove body, 2a is the right burner, 2
b is a left burner, 2c is a grill, 3 is an igniter equipped with spark plugs 3a, 3b, and 3c for each burner, 4 is an original solenoid valve, 5 is an operating unit for controlling firepower adjustment, etc., 51a, 5
lb and 51c are fire power regulators for each burner provided in the operating section 5; 52a, 52b, and 32c are on/off switches for each burner provided in the operating section 5; and 6 is a control circuit. 7a, 7b and 7c are the closure and monitor 7a
This is a gas flow rate control valve that combines d, 7b d, and 7c d, and is for the right burner 2a, left burner 2b, and grill 2c, respectively. Each motor 7a, to 7c■ is electrically connected to a control circuit 6, respectively. As shown in FIG. 3, the control circuit 6 includes a power supply circuit 61, a control microcomputer 62, and a flow control valve drive circuit 6.
3a, 63b, 63c, etc. The microcomputer 62 includes a CPU 64 that plays a central role in control, and a memory 65 such as a ROM or RAM in which necessary data such as control programs and priorities for driving the gas flow rate control valves 7a to 7c are stored in advance. Each drive circuit 6 is equipped with an output section, etc. as appropriate, and is connected to the output section.
38 to 63c are the motors 7 for each gas flow rate m regulating valves 7a to 7c.
a1 to 7c, are connected to each other.

This embodiment has the above-mentioned configuration, and the desired parna or grill is ignited and extinguished by operating the dot/extinguishing switches 52a to 52c of the operation section S, and the fire power is adjusted by:
Operating the thermal power regulators S1a to 51c of the operation part S to drive the motors 7ai to 7cm of the gas flow rate control valves 7a to 7c,
This is done by controlling the rotation angle of the closure and changing the gas flow rate. Hereinafter, the processing will be explained using the flowchart I shown in FIG. The figure shows the main routine of the control procedure, which is executed in parallel for each burner and grill. In addition, when operations overlap, the priority is
The type of operation and the combination of each burner and grill are set as shown in FIG. 5, for example, and the smaller the number, the higher the priority.

First, in step SL, the point/extinguishing switch 52 of the operating section 5 is
When it is detected that any one of a to 52c has been operated to the ignition side, if the original solenoid valve 4 is not open, it is opened, and an operation with a higher priority than the operated one is performed. It is determined in the next step S2 whether or not the process has been performed, and if it has been performed, the main routine for controlling the items with higher priority is concentrated and then the process moves to step S3; if not, the process immediately moves to step S3. This step S3 is an ignition procedure, in which the igniter 3
is activated, one of the gas flow rate control valves 7a to 7c corresponding to the operated point/extinguishing switch is driven and set to the ignition gas amount, and a safety switch timer is started.

Subsequently, in step s4, the ignition state of the burner is confirmed, and if the burner is in the ignition state, the igniter is stopped.

If it is not ignited in step S4, the process moves to step S5, and when the safety switch timer times out, the igniter stops. Then, in step s6, it is determined whether there is a control with a high priority, and if so, the main routine for the control with a high priority is executed, and then the process moves to step S7. If not, the process immediately moves to step S7. The gas flow control valve is driven and closed, and an ignition failure alarm is issued. This alarm is on/extinguish switch is 711
When it is detected that the input side has been operated, the process stops and returns to step S1.

On the other hand, after the ignition has been successfully ignited, proceed to the procedure for adjusting the firepower. That is, in step S8, it is determined whether or not the corresponding one of the thermal power regulators 51a to 51c has been operated. If it has been operated, it is determined in step S9 whether or not there is a control with a higher priority, and whether or not the corresponding one is operated is determined in step S9. If the control main routine for the one with the highest priority is executed, then the process moves to step SIO; otherwise, the process immediately moves to step SIO, where the gas flow rate control valve is driven and the opening degree is adjusted according to the operation of the thermal power regulator. This control is continued while repeating the procedure from step S4 until it is detected in the next step Sll that the on/off switch is operated to the extinguishing side.

Step 812 after the light/extinguishing switch is operated to the extinguishing side is the extinguishing procedure, in which it is determined whether there is a control with a high priority, and if so, the main routine of the control for the high priority is executed. After execution, if there is no other operation, the gas flow rate control valve is immediately driven and closed, and the process returns to step S1.

In this way, the presence or absence of a control with a high priority is determined at each step of the procedure, and if there is a control with a high priority, it is executed preferentially, so that even when operations overlap, the motor 7a. ~7c
i are not driven at the same time, and the power supply circuit 61 only needs to have the capacity necessary to drive one motor.

Note that in the embodiment, the gas flow rate control valves 7a to 7c are of a motor-driven type, but this is the method described in (a) using a proportional solenoid valve, or the method (b) using a plurality of gas solenoid valves. Of course, it can also be applied to gas cookers of the type described above.

<Effects of the Invention> As is clear from the embodiments described above, the present invention is configured to adjust the gas flow rate of a plurality of burners in order of priority. Therefore, in gas appliances equipped with multiple burners, such as a gas stove with two burners and a grill, the gas flow rate of multiple burners is not adjusted at the same time. This eliminates the need for a power source, prevents an increase in the cost of the power supply circuit, and makes it possible to provide gas appliances with multiple burners at low cost.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the structure of the present invention, FIG. 2 is a schematic diagram of an embodiment, FIG. 3 is a block diagram of a control circuit of the embodiment, and FIGS. FIG. (1)) is a flowchart of the control procedure, and FIG. 5 is a diagram showing an example of a priority order table. 2a and 2b...Right and left burners, 2c...Grill, 5 1 a, 5 l b, 5 1 c... Fire power regulator, 6... Control circuit, 7 a, 7 b, 7
c-Gas flow control valve, 7a1, 7b,, 7c...
- Motor, 61... Power supply circuit, 62... Microcomputer, 64... CPU. 65...Memory.

Claims (1)

[Claims] (1) A gas flow rate adjustment means provided for each of the plurality of burners, a drive operation unit for each gas flow rate adjustment means, and a system for setting in advance the priority order for driving the gas flow rate adjustment means. When the priority setting means and the drive operation section drive the plurality of gas flow rate adjustment means,
A control device for a gas burner, comprising: a drive control section that sequentially drives the gas flow rate adjusting means in order of priority set by the priority setting means.