JPH0126965Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a composite cooker equipped with a gas burner for oven cooking and a magnetron for high frequency cooking.

A conventional device of this kind, for example, as shown in FIG. The first and second timer circuits include a safety valve that is operated, a second timer circuit b that operates a magnetron for high-frequency cooking, and a self-resetting start switch c that is closed by pressing a start button. a,
Relays h and i are provided at b to be energized via timer contacts f and g, which are opened by timer motors d and e after a set time of closing by the set operation, and the relays h and i are energized to close the start switch c. According to this, the first and second timer circuits a and b are energized through the self-holding contacts j and k of the relays h and i in parallel, and the start button is released and the start switch c is activated. A device is known in which the energization operation continues even after the device is opened.

However, since this circuit is provided with dedicated relays f and g for energizing the first and second timer circuits a and b, the circuit configuration is accordingly complicated.

The present invention eliminates the relay dedicated to the first timer circuit by associating the manual operation member of the safety valve of the gas burner, which is always included in a compound cooker, with the energization operation of the first and second timer circuits of the conventional device. The purpose of this device is to provide a device with a simplified circuit configuration, and as shown in FIGS. 2 and 5, it includes a first timer circuit 3 for operating a gas burner 2 for oven cooking provided in a cooker 1; , a safety valve 5 which is interposed in the gas supply path 4 to the gas burner 2 and which is opened by manual operation, a second timer circuit 7 which operates a magnetron 6 for high frequency cooking, and which is closed by pressing the start button 8. Start switch 9
The first and second timer circuits 3 and 7 open their respective timer contacts 3 and 7 by closing the start switch 9.
a, 7a, the safety valve 5 is constituted as an electromagnetic safety valve that is held open by electromagnetic force in its open position, and is integrated with the safety valve 5 in the starting position. An operating member 10 is provided which is pressed by a button 8, and when the start button 8 is pressed to operate the operating member 10, the safety valve 5 is opened by suction.
is maintained in the operating position, and the operating member 10
A relay 11 is provided which is pushed by the operating member 10 at the operating position to close the start switch 9 and is energized via the timer contact 7a of the second timer circuit 7, and has a self-holding point 11a of the relay 11. are connected in parallel to the start switch 9.

As shown in FIG. 3, the cooking device 1 is equipped with a gas burner 2 below an oven chamber 12 housed therein, a magnetron 6 above it, and a hot air circulation fan 13 inside the oven chamber 12. And so.

The first timer circuit 3 is equipped with a timer motor 3b connected in series to a timer contact 3a as shown in FIG. motor 3
b.

During the set time of the first timer circuit 3 in which the timer contact 3a is kept closed, the combustion control circuit 14 is energized via the timer contact 3a, and the safety valve is connected to the gas supply path 4. The temperature adjustment solenoid valve 15 on the downstream side of the oven storage 1 is interposed between the solenoid valve 15 and the combustion control circuit 14.
Opening and closing is controlled according to the temperature inside oven 1.
The gas burner 2 is ignited when the temperature inside the burner 2 falls below a set temperature.

In the case shown in the second figure, an auxiliary switch 16 is interposed between the timer contact 3a and the timer motor 3b, and is opened when the operator is switched to the continuous operation position.

The second timer circuit 7 is constructed by connecting the above-mentioned relay 11 in parallel with the timer motor 7b to a series connection circuit of a timer contact 7a and a timer motor 7b, as shown in FIG. Like the timer contact 3a, it is closed by setting an operator (not shown) and opened by the timer motor 7b after a set time has elapsed.

During the set time of the second timer circuit 7 in which the timer contact 7a is kept closed, the relay 11 is energized, and the operating circuit 17 of the magnetron 6 is energized via its pair of contacts 11b and 11c. This enabled magnetron 6 to be activated.

In FIG. 2, reference numeral 18 indicates an operating circuit for the hot air circulation fan 13 which is energized through the timer contact 3a of the first timer circuit 3 during the set time of the first timer circuit 3, and reference numeral 19 indicates the front surface of the oven compartment 12. A latch switch 21 is opened when a latch mechanism (not shown) provided in the door 20 is released to cut off the power to the operating circuit 17 of the magnetron 6, and a latch switch 21 is closed when the front door 20 is opened to disconnect the latch switch 19. a monitor switch that closes a short circuit and blows out a fuse in the event of an accident, 22 a door switch that is opened following the closing of the monitor switch 21 when the front door 20 is opened; 23 a first and second timer circuit 3; ，
7 and the operating circuit 18 of the hot air circulation fan 13, each series overheat switch is shown.

As shown in the fourth figure, the safety valve 5 is composed of a valve body 25 that opens and closes the valve hole 24, and an electromagnet 26 that holds the valve body 25 in the open position. Generally, the valve body 25 and a push rod that presses the valve body are provided facing each other so as to be able to move toward and away from each other, but the manual operation member 10 of the present invention, which corresponds to the push rod, is integrally connected to the valve body 25. The tip thereof is provided so as to face the start button 8 provided on the operation panel 27 of the cooking device 1.

Thus, if the start button 8 is pressed,
As shown in Figure 5, the start button 8 contacts the manual operating member 10, moves it to the operating position, and opens the safety valve 5. Furthermore, a cam portion 10a is provided on the manual operating member 10, and a start switch 9 consisting of a limit switch that cooperates with the cam portion 10a is disposed near the cam portion 10a, so that the start switch 9 is positioned at the operating position of the manual operating member 10. When the solenoid valve 15 is open during this movement, the electromagnet 26 is forcibly excited for a certain period of time by the combustion control circuit 14, and then As shown in FIG. 2, the electromagnet 26 is continuously energized by the output from a flame detection element 28 such as a flame rod that detects ignition of the gas burner 2, and when the electromagnetic valve 15 is open, the combustion control is performed. The electromagnet 26 is forcibly excited by the circuit 14 regardless of the presence or absence of the output of the flame detection element 28, and the valve body 25 is held in the open position, and the manual operation member 10 is also held in the operating position. , the start switch 9 is kept closed.

Next, to explain its operation, to carry out oven cooking using the gas burner 2, the temperature adjustment knob is set, then the first timer circuit 3 is set, and the start button 8 is pressed.

According to these series of operations, the start switch 9, the overheat switch 23, and the timer contact 3
The combustion control circuit 14 is energized via a, the temperature adjustment solenoid valve 15 is opened by the combustion control circuit 14, and the electromagnet 26 is forcibly energized for a certain period of time, after which the gas burner 2 is ignited to excite it. The condition continues, the safety valve 5 is held open, the manual operation member 10 is held in the operating position, the start switch 9 is held closed, and the first timer circuit 3 is energized. This continues, and thereafter, oven cooking is performed using the gas burner 2 until the time set by the first timer circuit 3 has elapsed and the timer contact 3a is opened.

Further, in order to perform high frequency cooking using the magnetron 6, the second timer circuit 7 is set, and then the start button 8 is pressed.

According to this, the relay 11 is energized via the start switch 9, overheat switches 23, 23, and timer contact 7a, thereby energizing the operating circuit 17 of the magnetron 6 and energizing the second timer circuit 7. The high frequency cooking is continued by the magnetron 6 until the time set by the second timer circuit 7 elapses and the timer contact 7a is opened. In this case, when the start button 8 is pressed, the manual operation member 1
0 moves to the operating position and the safety valve 5 is opened, but at this time, the combustion control device 14 is not energized and the gas burner 2 is not ignited, so as soon as the start button 8 is released, the safety valve 5 is opened. Since the open state of the safety valve 5 is released and the manual member 10 is returned from the operation position to its original position, the safety valve 5 is not held open and is safe. Furthermore, in order to perform oven cooking and high frequency cooking, the above-described operations may be combined.

According to the present invention, the safety valve 5 is configured as a solenoid valve that is held open by electromagnetic force in its open position, and the operating member 10 is integrally operated with the safety valve 5 by pressing the start button 8. is provided so that the operating member 10 is maintained at its pressing operation position by the suction of the safety valve 5, and the start switch 9 is closed when pushed by the operating member 10 in the operating position of the operating member 10. Therefore, there is no need for a relay to continue energizing the first timer circuit 3, and the circuit configuration is simplified by omitting the relay compared to the conventional type described above. It has an effect that can be provided at a low price.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of a conventional example, Fig. 2 is a circuit diagram showing an example of implementation of the device of the present invention, and Fig. 3 is a circuit diagram of a cooking device.
FIGS. 4 and 5 are cross-sectional side views showing an example of the manual operation member of the present invention. 1...cooker, 2...gas burner, 3...first
Timer circuit, 3a...Timer contact, 4...Gas supply path, 5...Safety valve, 6...Magnetron, 7...
...Second timer circuit, 7a...Timer contact, 8...
Start button, 9...Start switch, 10
...Manual operation member, 11...Relay, 11a...
Self-holding contacts.

Claims (1)

[Scope of utility model registration request] A first timer circuit 3 for operating a gas burner 2 for oven cooking provided in the cooker 1, a safety valve 5 interposed in the gas supply path 4 to the gas burner 2 and opened by manual operation, and a safety valve 5 for operating the gas burner 2 for oven cooking. A second timer circuit 7 that operates the magnetron 6 and a start switch 9 that is closed by pressing the start button 8.
The first and second timer circuits 3 and 7 open their respective timer contacts 3 and 7 by closing the start switch 9.
a, 7a, the safety valve 5 is constituted as an electromagnetic safety valve that is held open by electromagnetic force in its open position, and is integrated with the safety valve 5 in the starting position. An operating member 10 is provided which is operated by pressing the button 8, and the operating member 10 is maintained at the pressing operation position by suction of the safety valve 5, and the operating member 10
A relay 11 is provided which is pushed by the operating member 10 in the operating position to close the start switch 9 and is energized via the timer contact 7a of the timer circuit 7, and has a self-holding contact 11a of the relay 11.
is connected in parallel to the start switch 9.