KR100385022B1 - Gas automatic flyer - Google Patents

Abstract

The present invention relates to a gas fryer, comprising a first microcomputer (U3) and a second microcomputer (U2) for controlling each circuit so as to be organically connected to each other, the display unit (1) to the first microcomputer (U3) The first and second devices 200 connected to each other to enable the function display by the operation of the function switches SW1 to SW16, and detect the operation of the function switches SW1 to SW16 and output them to the first microcomputer U3. A function switch detecting circuit (10, 11); A reset circuit 20 for sensing the operation of the function switch SW10 to initialize data stored in the first microcomputer U3; An EPROM (30) for storing data transmitted to the first microcomputer (U3); An input power supply unit 40 for supplying power to a circuit controlled by the first microcomputer U3 and the second microcomputer U2; A power failure detection circuit 50 for voltage-controlled rectifying the power supplied from the input power supply unit 40 and detecting an overcurrent input and an outage and outputting the detected power to the first microcomputer U3; A temperature sensing circuit 60 for sensing a temperature under the control of the first microcomputer U3; A load switching circuit 70 for controlling the output of the gas control valve (G.O.V), the high pressure transformer (H.V.T), and the fan (FAN) by opening and closing the circuit by the control of the second microcomputer (U2); In addition to the output of the load (G.O.V, H.V.T) it is characterized by consisting of a flame detection circuit (80) for detecting whether the frame (FLAME) is burned and output to the first microcomputer (U3).

Description

Gas automatic fryer {Gas automatic flyer}

The present invention relates to a gas automatic fryer, more specifically, by adopting a microcomputer circuit to check whether the normal operation of the device by yourself, easy to use by anyone and to minimize the heat loss safety, convenience and It is about a gas fryer that maximizes efficiency.

In general, the fryer is heated by the heating source of the frying oil filled in the frying container of the body to be fried in the frying net to be fried in the frying net placed inside the frying container.

The conventional gas fryer to fry the blood as described above is composed of a body, a frying container formed inside the body and filled with frying oil, and a combustion burner provided under the frying container to heat the frying oil.

The conventional gas fryer operates the combustion burner provided in the lower portion of the frying vessel to transfer heat to the frying vessel by the flame of the combustion burner, and the frying oil is heated by the heat transfer to splash the blood.

However, according to the conventional gas fryer, the heat after heating is discharged as it is, and the combustion burner does not have a rapid ignition and extinguishment, thereby increasing fuel consumption as well as a long cooking time.

In addition, there is no safety device for checking the normality of the exhaust device and the fryer of the waste gas, there is a problem that the risk factors for the leakage and safety of harmful gas due to the backflow of waste gas always remain.

The present invention has been proposed to solve the above problems, and its purpose is to control a plurality of protection circuits and sensing circuits by the microcomputer to check the normality of the fryer and waste gas generated during internal combustion. This ensures rapid discharge of fuel, which improves the safety and accuracy of the device, thereby eliminating hazards, making it easy for anyone to use, and minimizing fuel loss through rapid ignition and fire extinguishing to maximize cooking efficiency and shorten cooking time. It is to make it possible.

1 is a circuit diagram showing a gas fryer in accordance with the present invention.

2 is a circuit diagram showing a function switch and a display of the automatic gas fryer in accordance with the present invention.

3 is a state diagram showing the waste gas discharge principle of the automatic gas fryer according to the present invention.

Explanation of symbols on the main parts of the drawings

10: first function switch detection circuit 11: second function switch detection circuit

20: reset circuit 30: EPROM

40: input power supply unit 50: power failure detection circuit

60: temperature sensing circuit 70: load switching circuit

80: flame detection circuit 90: input power protection and lightning protection circuit

100: gas automobile short circuit 110: buzzer circuit

120: sound circuit 130: NOT buffer

140: buffer 200: display unit

200a: segment 200b: light emitting diode

U3: first microcomputer U2: second microcomputer

G.O.V: Gas Control Valve H.V.T: High Pressure Transformer

FAN: Ventilator ZNR1 to 5: Voltage nonlinear resistor

RY1 to 3: Relay SW1 to 16: Function switch

TH, TH1, TH2: Temperature sensor ZD1, ZD2: Zener diode

D1-D4: bridge diode

The present invention for achieving the above object is provided with a first microcomputer (U3) and a second microcomputer (U2) for controlling each circuit to be organically connected to each other, the display unit on the first microcomputer (U3) The function switch SW1 to SW16 to display the function by operating the function switches SW1 to SW16, and detect the operation of the function switches SW1 to SW16 by the voltage change and output the detected signal to the first microcomputer U3. First and second function switch detection circuits; A reset circuit for sensing the operation of the function switch SW10 to initialize data stored in the first microcomputer U3; An EPROM for storing data input to the first microcomputer U3; An input power supply unit for supplying power to a circuit controlled by the first microcomputer U3 and the second microcomputer U2; A power failure detection circuit for voltage-controlled rectifying the power supplied at the same time as the power supply of the input power supply unit, and detecting an overcurrent input and a power failure and outputting the power signal to the first microcomputer U3; A temperature sensor circuit for checking an abnormality of the temperature sensors TH, TH1, and TH2 under the control of the first microcomputer U3 and sensing a temperature; A load switching circuit for controlling the output of the gas control valve (G.O.V), the high pressure transformer (H.V.T), and the fan (FAN) by opening and closing the circuit by the control of the second microcomputer (U2); It includes a flame detection circuit for detecting the combustion of the frame (FLAME) with the output of the gas control valve (GOV) and the high-voltage transformer (HVT), and outputs the combustion signal (FIRE_SIGNAL) to the first microcomputer (U3). It is made into the basic feature on the technical structure.

Referring to the preferred embodiment of the present invention configured as described above in detail with reference to the drawings as follows.

1 is a circuit diagram showing an automatic gas fryer according to the present invention, Figure 2 is a circuit diagram showing a function switch and display of the automatic gas fryer according to the present invention, Figure 3 is a waste gas discharge principle of the automatic gas fryer according to the present invention It is a state diagram to show.

1 and 2, the automatic gas fryer according to the present invention is provided with a first microcomputer (U3) and a second microcomputer (U2) for controlling each circuit to be organically connected to each other, the first The display unit 200 is connected to the microcomputer U3 to enable the function display by the operation of the function switches SW1 to SW16, and the operation of the function switches SW1 to SW16 is detected by the voltage change and the detection thereof. First and second function switch detection circuits (10, 11) for outputting a signal to the first microcomputer (U3); A reset circuit 20 for sensing the operation of the function switch SW10 to initialize data stored in the first microcomputer U3; An EPROM (30) for storing data input to the first microcomputer (U3); An input power supply unit 40 for supplying power to a circuit controlled by the first microcomputer U3 and the second microcomputer U2; A power outage detection circuit 50 for voltage-controlled rectification of power supplied at the same time as the power supply of the input power supply unit 40 and detecting an overcurrent input and an outage and outputting the power signal to the first microcomputer U3; A temperature sensing circuit 60 for checking an abnormality of the temperature sensors TH, TH1, and TH2 under the control of the first microcomputer U3; A load switching circuit 70 for controlling the output of the gas control valve (G.O.V), the high pressure transformer (H.V.T), and the fan (FAN) by opening and closing the circuit by the control of the second microcomputer (U2); The flame detection circuit 80 detects the combustion of the frame FLAME together with the outputs of the gas control valve GOV and the high voltage transformer HVT, and outputs the combustion signal FIRE_SIGNAL to the first microcomputer U3. It is composed of

An input power protection and lightning protection circuit 90 is connected on the AC 220V input line of the input power supply unit 40 to prevent noise and to prevent breakage of each circuit due to lightning.

When the second microcomputer U2 cannot operate in a normal state due to noise or external shock, the second microcomputer 100 may immediately shut off the gas vehicle circuit 100 by blocking the gas control valve (GOV) through square wave control. U2) and the load switching circuit 70.

The input of the function switches SW1 to SW16 and the occurrence of a failure in each circuit cause the buzzer BZ to be connected to the first microcomputer so as to be recognized by the user.

At the end of cooking by the operation of the function switches SW1 to SW16, a melody sounds, and an acoustic circuit 120 capable of expanding and adjusting the sound size is connected to the second microcomputer U2.

On the other hand, the load switching circuit 70 is connected to the voltage nonlinear resistors ZNR3 to ZNR5 in parallel on the output lines of the gas control valve (G.O.V), the high-voltage transformer (H.V.T) and the fan (FAN), respectively.

The NOT buffer 130 and the buffer 140 are connected to an output terminal of the first microcomputer U3 connected to the display unit 200 to further brighten the brightness of the segment 200a and the light emitting diode 200b.

The flame detection circuit 80 is preferably to apply a high voltage of AC to easily detect the current flow of a low voltage to determine the correct combustion.

Meanwhile, as shown in FIG. 3, the dynamic pressure pipe 310 is connected to the fan FAN controlled by the second microcomputer U2, but the waste gas generated when the burner is burned is discharged to the outside. To be connected to the discharge pipe 320 to.

Referring to the operation of the automatic gas fryer according to the present invention made of such a configuration as follows.

First, input power of AC 220V, AC 160V, AC12V is applied to the input power source 40.

At the same time as the input power is applied, the surge killer SK1 of the input power protection and lightning protection circuit 90 connected on the input line of AC 220V absorbs the surge generated on the input line to protect the input power. The voltage nonlinear resistors ZNR1 and ZNR2, the surge absorber DSA, and the resistor R16 prevent damage to each circuit due to lightning.

In addition, when the input power is applied, the set temperature stored in the first microcomputer U3 and cooking time data for each menu are loaded and displayed on the segment 200a of the display unit 200, and the blackout detection circuit 50 is operated. By checking the electrostatic self-diagnosis whether the power outage.

The electrostatic detection circuit 50 supplies the DC power to the circuit by controlling the input power of AC 12V by the bridge diodes D1-D4, and if the power failure occurs, the voltage charged in the capacitances EC1 and EC2. While the current remains, the current flowing to the resistor R18 is cut off and the transistor Q9 is turned off to transmit the power signal POWER_SIGNAL of + 5V to the first microcomputer U3. By detecting the power failure by the power signal, the data stored in the first microcomputer U3 is stored in the EPROM 30 and the power supply is cut off.

If there is no abnormality after the electrostatic self-diagnosis by the electrostatic sensing circuit 50, the function switch SW1 is operated to supply input power to each circuit, and the temperature sensing circuit 60 is controlled by the control of the first microcomputer U3. The short circuit, disconnection and overheat of the temperature sensor (TH, TH1, TH2) connected to the unit will be checked. If a fault is checked, a fault indication is indicated by E1, E2, and E3 on the segment 200a of the display unit 200 so that a user can easily identify the second microcomputer (U2) when the fault is checked while the flame is ignited. By turning off the transistor Q12, the power supply to the relay RY3 is cut off, and the gas control valve GOV is turned off. At this time, when the input of the function switches SW1 to SW16 and a failure in each circuit occur, the buzzer BZ is caused to be caused by the control of the first microcomputer U3.

If there is no abnormality in the temperature sensing circuit 60, it is possible to change the set temperature or the first and second cooking times by operating the function switches SW2 to SW6 and SW11 to SW16, and set the menu number. At this time, the set temperature or the first and second cooking time is displayed on the segment 200a, and the menu number setting is displayed on the light emitting diodes LED7 to LED12, which is a NOT buffer connected to the output terminal of the first microcomputer U3. Current brightness of the 130 and the buffer 140 makes the brightness of the segment 200a and the light emitting diode 200b brighter.

Then, the set temperature and cooking time changed by the operation of the function switches SW8 to SW10 are immediately stored in the first microcomputer U3, and the set temperature and the present temperature are compared and judged by the temperature detection of the temperature sensing circuit 60. The fire extinguishing is automatically performed, and data initialization by the zener diode ZD1 of the reset circuit 20 is possible, so that the set temperature and cooking time can be set according to the user's intention. At this time, the operation of each function switch (SW8 to SW10) is displayed on the light emitting diodes (LED2 to LED4), the function operation display is the transistor (Q2, Q3) in the first and second function switch detection circuit (10, 11) And detection of a voltage change down from + 5V to 0V via resistors R31 and R32.

On the other hand, when the setting of the cooking temperature, cooking time, menu number is completed by operating the function switch (SW7) so that the flame of the burner for cooking is ignited. At this time, the fan FAN is operated by interlocking the fan switch FAN-SW connected to the first microcomputer U3 with the operation of the function switch SW7, and the transistor Q11 is controlled by the control of the second microcomputer U2. Q12) and relays RY1 and RY2 are turned on to turn on the high pressure transformer HVT and the gas control valve GOV to supply power and gas.

When the power and gas are supplied, the flame detection circuit 80 connected to the flame of the burner detects a current flow through moisture contained in the flame and outputs a combustion signal FIRE_SIGNAL to the first microcomputer U3. If there is a flame on the frame side, the voltage is turned down to output a + 5V combustion signal through the off-amp U5.If there is no flame on the frame side, the current flow in the off-amp (U5)- It is made higher than (+) stage so that there is no output.

When the ignition is completed, the temperature is sensed by the operation of the temperature sensing circuit 60 under the control of the first microcomputer U3 to be heated to the set temperature, and the cooking time is checked to indicate the end of cooking with the end of the cooking time. To be output through the speaker (SPEAKER) of the sound circuit 120. At this time, the acoustic circuit 120 is amplified by the current amplification of the transistors (Q5, Q6) and adjusts the sound size by varying the supply voltage by the variable resistor (VR1).

On the other hand, when the output is formed by the square wave oscillation in the second microcomputer U2, only the square wave passes through the capacitance EC4 of the gas vehicle circuit 100, and the transistors Q7 and Q8 are turned on to load-open circuits ( + 12V power is supplied to the relay RY3 of 70) and the gas control valve (GOV) is turned on to supply gas. If the second microcomputer (U2) is unable to control the circuit due to noise or external impact. In this case, the transistor Q7 of the gas shut-off circuit 100 is turned off, and the power supplied to the relay RY3 of the load switching circuit 70 is cut off to form a closed circuit, thereby turning off the gas control valve GOV. Will automatically shut off.

In addition, when a port of the second microcomputer U2 controlling the second microcomputer U2 or the fan FAN is dead, a + 5V power source applied to the resistor R41 of the load switching circuit 70 is dead. To forcibly turn on transistor Q10 and turn on relay RY1 to supply fan FAN, and the fan F always operates to smoothly discharge waste gas generated during internal combustion. To be discharged.

At this time, the waste gas generated during the combustion of the burner is discharged to the atmosphere by applying Bernoulli's definition, which quantitatively shows the relationship between the flow rate and the pressure of the fluid (gas or liquid), the dynamic pressure by the operation of the fan (FAN) The static pressure of the waste gas is lowered by the rapid flow speed of the dynamic pressure through the exhaust pipe 320 along the dynamic pressure pipe 310 connected to the FAN, thereby quickly discharging the waste gas into the atmosphere.

In addition, by a load switching circuit in which voltage non-linear resistors ZNR3 to ZNR5 are connected in parallel to the output terminals of the gas control valve GOV, the high voltage transformer HVT, and the fan FAN connected to the load switching circuit 70, respectively. The relay contact is protected by removing noise generated when the contacts of the relays RY1 to RY3 are turned on and off.

As described above, according to the automatic gas fryer according to the present invention, each circuit and load are controlled by a microcomputer to check the normality of the device by itself, and quickly discharge the waste gas generated during internal combustion to the outside, The gas supply is momentarily shut off to secure the safety of the device to remove the risk factors remaining in the device, and the function and fault indication by the operation of the device is displayed immediately, it is useful to provide convenience for using the device.

In addition, the ignition and digestion of the burner under the control of the microcomputer is minimized, thereby minimizing fuel loss, thereby maximizing thermal efficiency, thereby reducing the cooking time.

Claims (6)

A first microcomputer U3 and a second microcomputer U2 for controlling each circuit are provided to be organically connected to each other, and the display unit 200 is connected to the first microcomputer U3. Function display by the operation of SW16) is enabled, First and second function switch detection circuits (10, 11) for sensing the operation of the function switches (SW1 to SW16) by a voltage change and outputting the detection signal to the first microcomputer (U3); A reset circuit 20 for sensing the operation of the function switch SW10 to initialize data stored in the first microcomputer U3; An EPROM (30) for storing data transmitted to the first microcomputer (U3); An input power supply unit 40 for supplying power to a circuit controlled by the first microcomputer U3 and the second microcomputer U2; A power outage detection circuit 50 for voltage-controlled rectification of power supplied at the same time as the power supply of the input power supply unit 40 and detecting an overcurrent input and an outage and outputting the power signal to the first microcomputer U3; A temperature sensing circuit 60 for checking an abnormality of the temperature sensors TH, TH1, and TH2 under the control of the first microcomputer U3; A load switching circuit 70 for controlling the output of the gas control valve (G.O.V), the high pressure transformer (H.V.T), and the fan (FAN) by opening and closing the circuit by the control of the second microcomputer (U2); The flame detection circuit 80 detects the combustion of the frame FLAME together with the outputs of the gas control valve GOV and the high voltage transformer HVT, and outputs the combustion signal FIRE_SIGNAL to the first microcomputer U3. Gas fryer characterized in that it comprises a). The method of claim 1, In order to prevent noise by connecting a surge killer SK1 connected in series with a capacitor in series on an AC 220V input line of the input power supply unit 40, voltage nonlinear resistors ZNR1, ZNR2, and surge absorbers ( DSA) and the resistor (R16) is connected to the ground, but the automatic input gas protection and lightning protection circuit 90 characterized in that configured to be connected to the ground to prevent damage to each circuit due to lightning strike. The method of claim 1, If the second microcomputer (U2) is impossible to operate in a steady state due to noise or external impact, the second microcomputer (100) is configured to immediately extinguish gas by blocking the gas control valve (GOV) through square wave control. U2) and automatic gas fryer, characterized in that configured to be connected to the load opening and closing circuit (70). The method of claim 1, The load switching circuit 70 connects the voltage nonlinear resistors ZNR3 to ZNR5 in parallel on the output lines of the gas control valve GOV, the high voltage transformer HVT, and the fan FAN, respectively, so as to contact the relays RY1 to RY3. Gas fryer, characterized in that to protect the relay contact when the switch is ON / OFF. The method of claim 1, The NOT buffer 130 and the buffer 140 are respectively connected to the output terminals of the first microcomputer U3 connected to the display unit 200 to further increase the brightness of the segment 200a and the light emitting diode 200b through current amplification. Gas fryer characterized in that it is brightened. The method of claim 1, The fan (FAN) controlled by the second microcomputer (U2) is connected to the dynamic pressure pipe 310, but connected to the waste gas discharge pipe 320, automatic gas fryer characterized in that to induce the rapid discharge of the waste gas.