KR0154147B1 - Extinguishing control method of gas oven range - Google Patents

Abstract

The present invention relates to a control method for extinguishing a gas oven, excluding a phenomenon in which a cooking lamp is turned on for a predetermined time when extinguishing a gas oven.

Flame detection and gas valve driving circuit consisting of a micro switch (MS) which is turned on when the ignition knob is in the fire extinguishing position, a key input circuit 30 including a clock and a timer switch, a thermocouple (TC) and a gas valve (MPU), etc. In the fire extinguishing control method of the gas oven equipped with the furnace 40 and the display circuit 50,

When the signal input through the key input circuit 30 is in the clock mode, when the micro switch MS is turned on, the relay RY is turned off to prevent the thermocouple TC and the gas valve MPU from forming a closed circuit, and the cooking is performed. Turning off the heavy lamp and turning on the relay RY again after a predetermined time;

When the signal input through the key input circuit 30 is a timer mode, when the micro switch MS is turned on or the set time elapses, the relay RY prevents the thermocouple TC and the gas valve MPU from closing. Turn off, the cooking lamp is turned off, and after a predetermined time, the relay RY is turned on again.

Description

Control method for extinguishing gas oven

1 is a circuit diagram of the main part of the gas oven range to which the present invention is applied.

2 is an embodiment of a display unit to which the present invention is applied.

3 is a control flowchart according to the present invention.

* Explanation of symbols for main parts of the drawings

10: microcomputer 20: ignition knob position detection circuit

30: key input circuit 40: flame detection and gas valve driving circuit

50: display circuit 60: display unit

AMP: Amplifier TC: Thermocouple

MPU: Gas Valve MS: Micro Switch

The present invention relates to a control method for extinguishing a gas oven, and more particularly, to a method for extinguishing a gas oven, excluding a phenomenon in which a cooking lamp is turned on for a predetermined time during extinguishing.

In general, a gas stove is disposed on an upper portion of an oven, an oven range is disposed on a lower portion of the gas oven, a grill burner is disposed on an upper portion of the oven, and an oven burner is disposed on a lower portion of the oven to perform various cooking functions.

The gas oven is installed in the upper part of the burner thermocouple (Thermocouple), connected to the electromotive force of the thermocouple is applied to the gas valve located in the predetermined portion of the humidification supply pipe, the thermocouple is the inner two by the flame generated from the burner top Electromotive force is generated by a phenomenon in which the resistance value of the metal is changed, and the gas valve is electrically connected to the thermocouple and mechanically coupled to the ignition knob for opening the gas valve.

Therefore, when the ignition knob is rotated and the ignition is performed, the gas valve is opened in conjunction with the rotation of the ignition knob, whereby the gas is introduced into the burner and ignition is generated by the spark means (mechanically coupled with the ignition knob). The thermocouple then detects the presence of a flame. Here, when the thermocouple detects a flame, electromotive force is generated, and the electromotive force generated at this time is applied to the gas valve so that the gas valve is kept open and ignition is successful, and the signal processing source, the microcomputer, is displayed on the front of the set when the ignition is successful. The `` cooking '' mark on the screen will let the user know the ignition success.

However, when extinguishing, the ignition knob is in-place and fire is extinguished. However, even though the oven / grill was extinguished by the heat of the thermocouple itself and the latent heat of the oven / grill, the microcomputer judges that there is a flame for about 5-6 seconds. Even though there was no fire, the lamp under cooking was turned on. As a result, consumers are puzzled, which adversely affects product reliability.

The present invention has been made to solve the above problems.

Accordingly, it is an object of the present invention to provide a control method when extinguishing a gas oven, so that the cooking lamp is extinguished immediately when the gas oven is extinguished so that a consumer can easily recognize it.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a circuit diagram of the main part of the gas oven range to which the present invention is applied. Reference numeral 10 is a one-chip microcomputer, which incorporates a certain program according to the present invention and controls the overall operation of the set.

Reference numeral 20 denotes an ignition knob position detecting circuit, which is composed of resistors R1 and R2 and a micro switch MS. The micro switch MS is installed to be turned on when the ignition knob is not shown in the fire position. . Therefore, when the ignition knob is in the extinguishing position, the micro switch (MS) is turned on and a high signal is input to the input port (PI1) of the microcomputer (10). Will be recognized.

Reference numeral 30 denotes a key input circuit, which is composed of a clock switch SW1, a timer switch SW2, a time increase / decrease switch SW3, and the like. Key in the input port PI1 and set the current time using the time increase / decrease switch SW3. Then, press the clock switch SW1 once again to finish the time setting. In addition, when setting the time using the timer function, the timer switch (SW2) is once keyed into the input port (PI2) of the microcomputer 10, and then set the time using the time increase and decrease switch (SW3), and then again the timer switch Press (SW1) once to finish setting the timer time.

Reference numeral 40 denotes a flame detection and gas valve driving circuit, and the base of the transistor Q1 having the emitter terminal grounded through the resistors R6 and R7 is connected to the output port PO1 of the microcomputer 10, and the transistor is connected. The collector of Q1 is connected to one end of the coil part of the relay RY, and the thermocouple TC and the gas valve MPU are connected to the ends of the switch of the relay RY through the ground, and the thermocouple TC is connected. One end of the non-inverting terminal is connected to the inverting terminal of the amplifier (AMP) grounded through the resistor (R5) through the resistor (R4), the output of the amplifier (AMP) is the input port (PI6) of the microcomputer (10) When the microcomputer 10 outputs a low signal to the output port PO1, the transistor Q1 is turned on and the relay RY is energized so that the thermocouple TC and the gas valve MPU are closed circuit. Will be achieved. Therefore, when the ignition rotates the ignition knob (not shown) forcibly opening the gas valve (MPU) and the thermocouple (TC) detects the flame (by spark means) formed at this time, if the electromotive force is generated in the thermocouple (TC) The electromotive force is input to the inverting terminal of the amplifier AMP through the resistor R1 and amplified through the amplifier AMP. At this time, the amplified signal is input to the input port PI6 of the microcomputer 10, and when the input signal at this time is about 2V or more, the gas valve (MPU) is maintained in an open state, which means ignition success.

Reference numeral 50 denotes a display circuit, which is composed of a buffer B1 (B2), a plurality of lamps (LEDs) and a numeric display lamp (MTX) to display various marks of the display unit 60 shown in FIG. The letters such as 'current time', 'cooking time', 'hour', 'minute', 'second' and 'during cooking' are notified to the outside by lighting or turning off the lamp (LED) built in to correspond to each other. The number display lamp (MTX) lights up with the corresponding number. To this end, the microcomputer 10 outputs a scan signal to the output port group PON and outputs a predetermined output to turn on a corresponding lamp to the output port group PON.

Effects of the present invention configured as described above will be described with reference to the flowchart of FIG.

First, when power is applied, the microcomputer 10 detects a value input through the key input circuit 30 to determine whether the current mode is a clock mode or a timer mode (step 100). If it is found that the timer switch SW2 is in the non-keyed clock mode, the microcomputer 10 detects a value input from the ignition knob position detecting circuit 20 and turns on the micro switch MS so that the ignition knob is in the fire position. In step 101, when the on signal of the switch MS is detected, the relay RY is turned off by outputting a high signal to the flame detection and gas valve driving circuit 40 (step 104). It prevents the thermocouple (TC) and the gas valve (MPU) from forming a closed circuit, and performs a predetermined output to the display circuit 50, and turns off the "cooking" display (step 105), and proceeds with fire extinguishing ( In step 106), the clock display is output to the display circuit (step 107), and after 5 seconds (108), the relay RY is turned on again (step 109).

On the other hand, if it is determined in the timer mode in step 100, by detecting the value input from the ignition knob position detection circuit 20 to determine whether the micro switch (MS) is turned on to determine whether the ignition knob is in the fire position (step 102). Here, when the ON signal of the switch MS is detected or the set time has elapsed, the thermocouple TC is output by outputting a high signal to the flame detection and gas valve driving circuit 40 to turn off the relay RY (104). The gas valve (MPU) is prevented from forming a closed circuit, and a predetermined output is output to the display circuit 50, and the " cooking " display is turned off (step 105). Then proceed with the fire extinguishing operation (step 106). The clock display is output to the display circuit (step 107), and after 5 seconds (108 steps), the relay RY is turned on again (step 109).

As described above, the present invention is a useful invention in which the reliability of the product is improved by preventing the phenomenon in which the "during cooking" lamp is turned on even when there is no flame when extinguishing.

Claims (1)

Spark sensing gas valve driving circuit consisting of a micro switch (MS) that is turned on when the ignition knob is in the fire extinguishing position, a key input circuit 30 including a clock and a timer switch, and a thermocouple (TC) and a gas valve (MPU). In the control method of extinguishing a gas oven with the 40 and the display circuit 50, when the micro switch MS is turned on when the signal input through the key input circuit 30 is in the clock mode. Turning off the relay RY to turn off the thermocouple TC and the gas valve MPU, turning off the cooking lamp, and turning on the relay RY again after a predetermined time; When the signal input through the circuit 30 is in the timer mode, when the micro switch MS is turned on or the set time elapses, the relay RY is turned off so that the thermocouple TC and the gas valve MPU do not form a closed circuit. Cooking lamp Turned off, and after the predetermined time elapsed control method for extinguishing a gas oven, characterized in that it comprises a process for turning on the relay (RY) again.