KR960012162B1 - Control devices for gas range - Google Patents

Abstract

The circuit for detecting operation state of a gas range comprises a power circuit(29) for driving an ignition transformer, a reset unit for generating a reset signal(28), a key operation unit(22) for operating the gas range, a remote signal receiver(23) for receiving and transforming the signal, a remote controller(36) for receiving the transmission signal, a display unit(24), a load driving unit(34), a MPU unit(35), a operation state sensor(27), an alarm unit(25), and a micro computer(21) for controlling all systems of the gas range.

Description

Gas stove remote control and drive control circuit

1 is a cross-sectional view of a conventional gas stove.

2 is a cross-sectional view of the gas stove of the present invention.

3 is a block diagram of a remote control and drive control circuit of the present invention gas stove.

4 is a detailed circuit diagram of one embodiment according to the present invention.

5 is a waveform diagram of each part in FIG.

* Explanation of symbols for main parts of the drawings

1: burner 2: nozzle

3: thermocouple 4: gas supply pipe

5: packing 6: spring

7: head 8: magnet

9: coil 10: MPU

11,12 housing 21: microcomputer

22: key operation unit 23: remote control light receiving unit

24: display unit 25: alarm unit

26: salt detection unit 27: driving state detection unit

28: reset portion 29: power supply circuit portion

30: power control unit 31: ignition transformer control unit

32: power supply unit 33: power detection unit

34: load driving part 35: MP oil part

36: remote control

The present invention relates to remote control and drive control of a gas stove, and in particular, by employing a microcomputer to enable rapid ignition, reservation reservation, safety devices and remote control, remote control and It relates to a drive control circuit.

As shown in the cross-sectional view of FIG. 1, a conventional gas stove is provided with a gas supply port at one side of the gas supply pipe 4 and a gas discharge port at a predetermined position from the gas supply port. A shaft 6 connected to the head 7 for adsorbing to the magnet 8 when gas is supplied is mounted with an MP oil 10 having a built-in magnet 8 on which a coil 9 is wound. ) And a packing (5) for blocking gas at the gas supply port side of the gas supply pipe (4) on one side of the shaft, and spraying the gas on the bottom of the burner (1) equipped with a thermocouple (3) on one side. Nozzle 2 for the connection and connects the nozzle 2 to the gas outlet of the gas supply pipe 4 through a pipe, and one terminal of the thermocouple 3 is connected to the MPU 10 with a lead wire. In addition, the other terminal is connected to the gas supply pipe (4) It is configured to connect to the discharge port.

The head 7 is attracted to the magnet 8 using the electromotive force of the thermocouple 3 after the spring 9 is pressed by the shaft in the gas supply pipe 4 at the time of gas supply, and the magnetic force of the magnet 8 at the time of gas blocking. The loss and the restoring force of the spring 9 return to the original position.

Referring to the operation of the conventional gas stove as follows.

When gas is supplied for cooking, when the ignition switch is turned on, the packing 5 is pressed by the shaft in the gas supply pipe 4, and the gas supplied through the gas supply port is injected through the nozzle 2, and then the burner 1 When the ignition occurs and the salt is generated by the combustion of the gas, the thermocouple 3 mounted on one side of the burner 1 generates electromotive force by the temperature difference between the heat and cold contacts, which are different conductors. do.

At this time, the current due to the electromotive force of the thermocouple (3) flows to the coil (9) wound on the magnet (8) in the MP 10, the magnet (8) generates a magnetic force by pressing the packing (5) The moved head 7 is attracted to the magnet 8.

Thus, while the salt is generated, the thermocouple 3 continues to generate electromotive force so that the head 8 remains adsorbed to the magnet 8 in the MP oil 10 to supply the gas supplied through the gas supply pipe 4. Is continuously supplied to the burner 1 through the nozzle 2 and combusted.

On the other hand, when the gas is supplied and burned in the burner 1, the fire is turned off due to the occurrence of abnormality caused by the overflow of the wind or broth, and the salt is not generated. As the magnet 8 loses the magnetic force, the head 7 moves to the original position by the restoring force of the spring 6, so that the packing 5 blocks the gas supply to the gas supply pipe 4.

However, since the thermoelectric power of the thermocouple gradually rises depending on the salt temperature (takes about 1 second or more), it does not have an ultra-fast ignition, and there is no time reservation function, a self-diagnosis function, and a remote control function. There was a problem that involves the risk of an accident when an error occurs.

In order to solve the conventional problems, the present invention performs remote control with a remote controller and detects the load state in normal operation so that the thermocouple and MPU are connected to the microcomputer, respectively. Created a remote control and load driving control circuit of the gas stove for controlling the operation of the stove, it will be described in detail with reference to the accompanying drawings as follows.

The present invention provides a power supply circuit means for rectifying and smoothing an AC power supply to output a DC voltage (+ Bl) (+ B2) (Vcc) of a predetermined level and detecting an abnormal state of the power supply in order to achieve the above object; Reset means for outputting the reset signal RST according to the output V1 of this power supply circuit means, Key operation means for setting the overall operation such as ignition, fire extinguishing and reservation of the stove, and remote control of the stove. Remote control light receiving means for receiving and converting a transmission signal of a remote control to a predetermined level, display means for displaying a set operation according to the key operation means or key selection of the remote control, and calculating a drive control signal to output a drive signal Load driving means, an MPU means for driving the MPU in accordance with the output of the load driving means, and attracting the head 7, and a state sensing scene in response to sensing the output of the load driving means. A load driving state detecting means for outputting a salt, salt sensing means for detecting an electromotive force of a thermocouple TC, salts caused by gas combustion, an alarm means for alarming a state according to an operation of a gas stove, and the key manipulation means Outputs a power control signal and a drive control signal to the power circuit means and the drive control means respectively to control the driving of the MPU and the ignition transformer according to the output of the drive of the load according to the output of the load driving state sensing means. The control signal is output to the power supply circuit means and the load driving means in accordance with the state and the output state of the salt detection means to determine whether the gas stove is connected to the display means. It is possible to use a microcomputer to display the operation status and to notify the alarm unit of the abnormal condition when the gas stove detects an abnormal condition. The.

2 is a cross-sectional view of the gas stove of the present invention, as shown therein, a gas supply port is provided on one side of the gas supply pipe 4, and a gas discharge port is provided at a predetermined position from the gas supply port. On the gas outlet side of 4), an MPU (MPU) having a built-in magnet 8 having a coil 9 wound thereon is mounted, and a shaft connected to the head 7 for adsorbing to the magnet 8 when gas is supplied. Is inserted into the spring (6) to the packing (5) for blocking the gas at the gas supply port side of the gas supply pipe 4 on one side of the shaft, the burner (1) equipped with a thermocouple (TC) on one side A nozzle 2 for gas injection is provided at the bottom of the tube, and the nozzle 2 is connected to the gas outlet of the gas supply pipe 4 through a pipe, and one terminal and the other terminal of the thermocouple TC are connected to the housing ( 11) is connected to the salt detection unit 26, and the load drive unit 34 One terminal of the housing 12 connected to is connected to the MPU (MPU), and the other terminal is connected to the gas outlet of the gas supply pipe 4.

The structure of the middle burner of the present invention is connected to one terminal of the thermocouple (TC) to the NIPU (nipu) as in the prior art, and the other terminal to the gas outlet of the gas supply pipe (4) to operate the gas stove during power failure. Configure.

3 is a block diagram of the remote control and drive control circuit of the gas stove according to the present invention, as shown in this figure, rectifying and smoothing an AC power supply to output a DC voltage of a predetermined level and detecting an abnormal state of the power supply when power failure occurs. A power supply circuit section 29 for driving the ignition transformer of the heavy burner, a reset section 28 for outputting a reset signal RST in response to detecting the output voltage V1 of the power supply circuit section 29, and a gas stove. Key operation unit 22 for setting overall operations such as ignition, fire extinguishing and reservation, remote control receiver 23 for receiving and converting a transmission signal of remote controller 36 for remote control of a gas stove to a predetermined level; A display unit 24 for displaying the operation set according to the key operation unit 22 or the key selection of the remote controller 36, and a load driver 34 for driving the relays RY1-RY4 with the drive signal as the drive control signal is calculated. ) And the load driving section 34 The MPU unit 35 driving the MPU to absorb the head 7 according to the force, and the load driving partner outputting an operation state detection signal of the load as the output voltage of the load driver 34 is sensed. The detection unit 27, the salt detection unit 26 for detecting the electromotive force of the thermocouple (TC) to detect the salt caused by gas combustion, the alarm unit 25 for notifying the operating state of the gas stove, and the reset unit The power control unit 30 and the drive control unit 33 according to the output of the remote control light receiving unit 23 according to the key selection of the key operation unit 22 or the remote control 36 after being reset to the output RST of the 28. Outputs a control signal to turn on the MPU (MPU), the ignition transformer 311 is turned on, and the driving state of the load and the salt by the gas combustion to detect the power circuit unit 29 and the load driver 34 Outputs a control signal to control the driving of the load and simultaneously By outputting a signal to the display unit 24 is composed of a microcomputer 21 that controls the entire operation of the stove.

Such a detailed circuit diagram of an embodiment of the present invention is described in FIG. 4 as follows.

The remote control light receiver 23 includes a light receiver 231, a capacitor C32, a C33, and a resistor R51.

The alarm unit 25 commonly connects the output of the microcomputer 21 to one end of the resistors R42 and R43, and connects the other end of the resistor R43 to one end of the buzzer BZ. Through the resistor R44, the collector is connected to the base of the transistor Q6 which is commonly connected to the other end of the resistor R42 and the other end of the buzzer BZ, and the emitter of the transistor Q6 is connected to the buzzer ( It is configured by connecting to the ground terminal of BZ).

The salt detection unit 26 inverts and amplifies the electromotive force of the large burner, the sober burner and the grill thermocouple (TC1-TC3) to input ports A / D0, A / Dl, and A / D2 of the microprocessor 21, respectively. Amplifiers, resistors, and capacitors (261, R24-R29, C14-C19) (262, R30-R35, C20-C25) 263, R36-R41, and C26-C31 respectively inputted thereto.

The load driver 34 connects the output of the drive controller 341 which calculates the drive control signal of the microcomputer 21 and outputs the drive signal to the relay coils RL1-RL5 and the voltage (+ Bl) is one end. The other end of the relay RY4 applied to the common terminal is connected to one end of the relays RYl (RY2) and RY3, and the other end of the relay RYl (RY2) and RY3 is connected to the load driving state detecting unit 27. And the resistors R45-R47 through the resistors R45-R47, respectively, to the MPUs MPU1, MPU2, and MPU3 of the MPU part 35, respectively.

The load driving state detecting unit 27 detects the output of the load driving unit 33 and controls a current flow by the pull-up resistors R18-R20 to output a state sensing signal to the microcomputer 21 (PC1). -PC3).

The power supply circuit unit 29 rectifies and smoothes AC power to output a DC voltage having a predetermined level, and the voltage of the power supply unit 32 is controlled by the power control signal of the microcomputer 21. Relay operation of the power supply control unit 30 for controlling the output box to (33), the power detection unit 33 for detecting an abnormal state of the power supply by detecting the output voltage of the power supply unit 32, and the load driver 34 In accordance with the output voltage of the power supply unit 32 is composed of an ignition transformer driving unit 31 for driving the ignition transformer 311 of the heavy burner, the power control unit 30 is a voltage control signal of the microcomputer 21 The transistor Q2 turns on and off as it is rectified through the diodes D1 and D2, the capacitors C3 and C4, and the resistors R4-R7, and the voltage is changed according to the turn-on and turn-off of the transistor Q2. Outputting (+ B2) to the load driver 34 and the relay coil RL6 The ignition transformer driving unit 31 includes a transistor Ql, and the collector of the transistor Q7 connected to the output voltage of the power supply unit 32 of the Zener diode ZDl whose anode is grounded through a resistor Rl. A relay connected to a cathode and a base of the transistor Q7, and an emitter of the transistor Q7 connected to one terminal of the relay RY5 and the other input terminal of the relay RY6 having one input terminal connected to a battery, and the relay Connect the fixed terminal of (RY6) to one terminal of the heavy burner switch (US / W) and

The other terminal of the side terminal and the middle burner switch (US / W) is connected to the ignition transformer 311, and the power detecting unit 33 connects the output of the power supply unit 32 to the ground resistor R13. The connection point is connected to the ground resistor R15 and the ground capacitor C8 via a resistor R14, and the emitter is connected to the base of the transistor Q3 to which the emitter is grounded. The voltage Vcc is connected via the resistor R16. The collector of the transistor Q3 is connected to the ground capacitor C9 and connected to the power state detection terminal INT0 of the microcomputer 21 through the resistor R17.

The reset unit 28 turns on and off the transistor Q4 according to the output V1 of the power supply control unit 30, and turns on and off the reset IC 281 according to the output of the transistor Q4. Is a transistor (Q5) for controlling the output of the input to the microcomputer (21).

The operation and effect of the present invention configured as described above will be described in detail with reference to the waveform diagram of each part of FIG. 5.

When AC power is applied to the power supply circuit unit 29 of the gas stove, the power supply unit 32 removes the noise and then decompresses and rectifies and smoothes the rectified and smoothed voltage. Outputs the voltage (+ B2) (Vcc).

At this time, since the output V1 of the power supply control unit 30 of the power supply circuit unit 29 that has not received the control signal from the microcomputer 21 has a low potential, the reset unit 28 has the transistor Q4 turned off. The microcomputer to which the low-potential reset signal RST is applied by turning on the transistor Q5 applied to the base through the resistors R9-R11 and the capacitor C5 is turned on. When 21 is reset and the capacitor C5 is charged after a predetermined time has elapsed, no voltage is applied to the transistor Q5 so that the reset IC 281 turns off when the reset IC 281 outputs a high potential. 21 executes a built-in program.

In addition, the ignition transformer driving unit 31 of the power supply circuit unit 29 maintains the output voltage + B1 of the power supply unit 32 at a constant voltage in the resistor R1 and the Zener diode ZD1, and thus the transistor Q7 ) Is turned on so that the output voltage + Bl of the power supply unit 32 is applied to the relays RY5 and RY6 through the transistor Q7.

In the power circuit unit 29, the power detection unit 28, which receives a DC voltage of a predetermined level from the power supply unit 32, divides the voltage from the resistors R13 and R14 to charge and discharge the resistor R15 and the capacitor C8. As a result, the transistor Q3 repeatedly turns on and off every predetermined time, thereby outputting a pulse as shown in FIG. 5 (b), and counting the pulses. The microcomputer 21 receives the alternating current inputted to the power supply unit 32. It is determined whether the voltage is normal.

At this time, when the ignition switch of the key operation unit 22 is turned on to perform cooking, the microcomputer 21 outputs a pulse as shown in FIG. 5A, and the power control unit 30 of the power supply circuit unit 29 performs the pulse. Is rectified and smoothed by the resistors R5-R7, the diodes D1 and D2 and the capacitor C4 and output at a high level with a constant level, so that the transistor Q2 is turned on so that the transistor Q1 is applied with a low potential to the base. By being turned on, the output voltage + B2 of the power supply unit 32 is output to the drive controller 341 of the load driver 34 and is applied to the relay coil RL6 of the power supply control unit 30.

Accordingly, the microcomputer 21 outputs a drive control signal having a high potential to the drive controller 341 of the load driver 34, so that the drive controller 341 outputs a low potential drive signal to the relay coils RL1 and RL5. In addition, by outputting a low-potential driving signal to the corresponding relay coil of the relay coils RL2-RL4, the voltage to the corresponding MPU of the LPB of the MPU unit 35, the burner and the grille of the MPU (MPU1-MPU3) + B1) is applied.

The power supply circuit unit 29 inputs the power supply unit 32 input to the transistor Q7 as the relay RY6 of the ignition transformer driving unit 31 is turned on as a current flows through the relay coil RL6 of the power control unit 30. The output voltage of + Bl is applied to one terminal of the heavy burner switch US / W.

Thus, when the ignition switch is turned on, the packing 5 is pressed by the shaft in the gas supply pipe 4 so that gas is supplied through the gas outlet of the gas supply pipe 4 to be injected from the nozzle 2 and the nozzle ( When the gas is injected in 2), the relay RY5 of the ignition transformer driving unit 31 is turned on, so that the gas supplied to the burner 1 is ignited and burned by a current flow in the ignition transformer 311, and the gas supply pipe ( 4) after a predetermined time has elapsed since the gas supplied to the burner 1 is ignited, the microcomputer 21 controls the drive controller 341 of the load driver 34 to turn off the relay RY5.

At this time, when the thermocouple (TC) generates an electromotive force by the salt when the gas is burned in the burner (1), the salt detection unit 26 detects the electromotive force by the thermocouple (TC), the salt detection unit 26 Inverter amplifies the electromotive force of the thermocouple (TC1-TC3) by a predetermined level in the amplifier (261-263), and the microcomputer 21 receiving the amplified signal determines whether there is an abnormal state due to gas combustion.

Therefore, when the output of the salt detection unit 26 is greater than or equal to the predetermined level, the microcomputer 21 that determines that combustion is normal continues to output a high potential drive control signal to the drive controller 341 of the load drive unit 34 to load the load. As the current continues to flow through the relay coils RL1-RL4 of the driving unit 34, the voltage (+ Bl) passes through the relay RY4 and then through the relays RY1-RY3, respectively. Each of them is applied to the MPU3 so that the magnet 8 continues to generate magnetic force, so that the head 7 continues to be adsorbed and combustion of the gas in the burner 1 continues.

Here, the output signal as the salt detection unit 26 detects the combustion salt is as shown in FIG.

In addition, the load driving state detection unit 27 relays (RY1-RY3) of the load driving unit 34 in order to detect the driving state of the large burner, the heavy burner and the grille MPU (MPU1-MPU3) of the MP oil unit 35. The output voltage of the photocoupler PC1-PC3 is sensed by the photocoupler PC1-PC3. When the voltage is outputted to the relay RY1-RY3, the photodiode of the photocoupler PCX1-PC3 emits light so that the photo transistor is turned on. As the current by the voltage Vcc applied to the R18-R20 flows to the ground, the microcomputer 21 determines that the MPUs MPU1-MPU3 are normally driven and continues the combustion operation.

Here, the output signal of the load driving state detection unit 27 is output as shown in FIG.

On the other hand, the microcomputer 21, which determines whether the set time is reached by selecting a key of the key operation unit 22 and setting the cooking reservation, determines whether the set time is reached, and when the set time is reached, the drive control signal of high potential to the load driver 33. Outputs a current to the corresponding relay coil among the relay coils RL1-RL5 of the load driving unit 34 to supply gas to the nozzle 2 from the gas supply pipe 4 to burn the salt, and to detect salts by the combustion. The MP26 (MPU1-MPU3) of the MPU unit 35 is determined by the unit 26 to determine whether it is normal combustion and at the same time by detecting the voltage output to the load driver 34 with the load driving state detector 27. The combustion operation is controlled by determining the driving state of.

In addition, when the user performs cooking or sets a reservation by using the remote controller 36, the remote controller light receiver 23 converts the light receiving element 231, which has received the transmission signal of the remote controller 36, into an electrical signal and outputs a condenser. A signal as shown in FIG. 5 (d) is input to the microcomputer 21 through the C33 and the resistor R51 to control the operation according to the cooking setting.

That is, when the microcomputer 21 receives the extinguishing signal through the remote controller light receiver 24 by selecting the extinguishing key from the remote controller 36, a low potential drive control signal is transmitted to the drive controller 341 of the load driver 34. When the relay RY1-RY5 of the load driving section 34 is turned off and the relay RY1-RY4 is turned off, the magnet 8 of the MPU-MPU3 loses its magnetic force. The gas supply to the burner 1 is interrupted by returning to the original position by the restoring force of the sputtering 6 and the packing 5 blocking the gas supply pipe 4.

Here, the display unit 24 receives the output of the dry microcomputer 21 by the key selection of the key operating unit 22 or the remote control 36 to display a set cooking state or a reservation setting state.

On the other hand, when the combustion of the burner 1 is stopped by the wind or the soup, when the output of the salt detection unit 26 is below a predetermined level, the microcomputer 21 outputs a low-potential drive control signal so that the load driver 34 ) Outputs a driving signal having a high potential, so that current flow is interrupted to the relays RY1 to RY5 such that the voltage (-B1) is not applied to the MPU 35.

Accordingly, the MPU (MPU1-NIPU3) of the MPU 35 loses its magnetic force because the voltage is not output from the load driver 34, and the head 7 is restored to its original position by the restoring force of the spring 6. As a result, the packing 5 blocks the gas supply pipe 4 so that the gas supply is blocked.

When an abnormal state occurs when gas is burned in the burner 1 and no salt is generated, or when a fire extinguishing operation is performed by a user's key operation, the microcomputer 21 displays an alarm of high potential on the alarm unit 25. By outputting a signal and turning on the transistor Q6, the buzzer BZ is operated to notify the user of occurrence of an abnormal state or execution of a fire extinguishing operation.

In addition, when the power failure occurs, the microcomputer 21 does not operate, but the power circuit unit 29 rotates by pressing the heavy burner ignition switch for cooking as the contact point of the relay RY6 of the power control unit 30 returns to its original position. When the heavy burner switch is turned on, the voltage of the battery is applied to the ignition transformer 311 through the relay RY6, and the packing 5 which is blocking the gas supply pipe 4 by turning on the ignition switch is MPU. It is pushed to the (MPU) side.

At this time, when the gas supplied through the gas supply pipe 4 is injected from the nozzle 2, the gas is ignited by the ignition transformer so that the thermocouple (TC) generates an electromotive force by the temperature difference of the contact by the heat detection of both contacts The magnetic force is generated in the magnet L8 in the MPU N4PU so that the head 7 is attached to the magnet 8.

As a result, the gas is burned in the burner 1, so that the MPU adsorbs the head 7, and thus the gas is continuously supplied to the gas supply pipe 4 and burned in the burner 1.

As described in detail above, the present invention can maximize safety by always detecting an abnormal state of a system by detecting an ignition state and a load driving state using a microcomputer, and performing remote control by a program using a remote controller. This has the effect of providing convenience to the user.

Claims (8)

Power supply circuit means for rectifying and smoothing AC power to output DC voltages (+ B1) (+ B2) (Vcc) of predetermined levels and detecting abnormal conditions of the power supply; A key operating means pipe for setting the pressure control unit, a load driving means for calculating a rural control signal and outputting a driving signal, and an MP oil means for driving the MPU in accordance with the output of the load driving means to adsorb the head 7. And load driving relative detection means for outputting a state detection signal according to the output of the load driving means, salt detection means for detecting salt caused by gas combustion by sensing electromotive force of the thermocouple TC, and the key manipulation means. Outputs a power control signal and a drive control signal to the power circuit means and the drive control means, respectively, to control the driving of the MPU and the ignition transformer according to the output of Migro controlling the overall operation of the stove by outputting a control signal to the power supply circuit means and the load driving means in accordance with the discrimination of the driving state of the load according to the output of the load and the abnormal state of combustion according to the output of the salt detection means. A gas stove remote control and drive control circuit comprising a computer. The apparatus of claim 1, further comprising a remote controller for transmitting a signal for remote control of the gas stove, and a remote controller for receiving the signal from the remote controller, converting the signal to a predetermined level, and outputting the signal to a microcomputer. Remote control and drive control circuit of the stove. The gas stove remote control and drive control circuit according to claim 1, comprising display means for displaying a set operation according to key selection means or key selection of a remote controller. 2. The remote control and drive control circuit of a gas stove according to claim 1, further comprising alarm means for alarming an operating state of the gas stove under control of a microcomputer. The method of claim 1, wherein the salt detection means by inverting and amplifying the electromotive force of the large burner, soburner, the grill thermocouple (TC1-TC3) respectively to the input port (A / D0, A / D1, A / D2) of the microprocessor A remote control and drive control circuit for a gas stove, comprising amplifiers 261, 262, and 263, which are respectively input. The photocoupler according to claim 1, wherein the load driving state sensing means outputs a load driving state sensing signal to the microcomputer by controlling the current flow by the pull-up resistors R18-R20 in response to sensing the output of the load driving means. PC1-PC3), the remote control light drive control circuit of the stove. 2. The load driving means according to claim 1, wherein the load driving means commonly connects the other end of the relay RY4 to which one voltage (± B1) is applied to one end of the relay RY1, RY2, and RY3. The other end of RY2 and RY3 is connected to the photocoupler PC1-PC3 of the load driving state sensing means and connected to the MPUs MPU1, MPU2 and MPU3 of the MPU means, respectively. Remote control and drive control circuit of the stove. 2. The gas stove according to claim 1, wherein the power circuit means comprises ignition transformer driving means for supplying rectified smoothed power to the ignition transformer when the power is normal and supplying voltage of the battery to the ignition transformer in case of power failure. Remote control and driving control circuit.