CN216871045U - Intelligent gas furnace control circuit - Google Patents
Intelligent gas furnace control circuit Download PDFInfo
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- CN216871045U CN216871045U CN202123383133.6U CN202123383133U CN216871045U CN 216871045 U CN216871045 U CN 216871045U CN 202123383133 U CN202123383133 U CN 202123383133U CN 216871045 U CN216871045 U CN 216871045U
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Abstract
The utility model discloses an intelligent gas furnace control circuit, which relates to the technical field of intelligent cooking ranges and comprises a main control U1, a touch and display module, a sensor module and a valve control module; the touch control and display module, the sensor module and the valve control module are respectively connected with the master control signal. The utility model mainly solves the problem of low intelligentization and integration degree of the gas furnace; according to the control circuit of the intelligent gas furnace, ignition and fire power adjustment can be intelligently completed in an electronic mode, and the control is more convenient and accurate; the intelligent fire monitoring system has a furnace temperature sensing function and a flame sensing function, and can display parameters such as furnace temperature and firepower grade through the touch control and display module, so that the intelligent and integrated degrees are higher.
Description
Technical Field
The utility model relates to the technical field of intelligent cooking ranges, in particular to an intelligent gas furnace control circuit.
Background
The gas stove is a stove using petroleum gas or natural gas as fuel, most families can be provided with various gas stoves, the gas stove has a long history and wide application, and the gas stove can be used as a kitchen stove, a water heater and an oven.
In a conventional gas burner, a mechanical manual igniter or an electronic igniter driven by a dry battery is generally used to perform ignition, and a manual control valve is used to adjust the amount of gas discharged to adjust the heating power.
The ignition and the fire power adjustment of the gas furnace depend on manual operation, and the gas furnace is also lack of necessary furnace temperature sensing function and flame sensing function, so that the gas furnace is low in intelligentization and integration degree and has certain potential safety hazard.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an intelligent gas furnace control circuit which has higher intelligent and integrated degrees.
In order to achieve the purpose, the utility model provides the following technical scheme: an intelligent gas furnace control circuit comprises a main control U1, a touch and display module, a sensor module and a valve control module; the touch control and display module, the sensor module and the valve control module are respectively connected with the master control signal.
In the technical scheme, the touch control and display module comprises an LED driving chip U5 and a dot matrix LED touch display screen LED-TP 1; the LED driving chip U5 is in serial communication connection with the main control U1; pins ROW0-ROW29 of the LED driving chip U5 are respectively connected with driving input ends of each LED dot matrix ROW of the dot matrix LED touch display screen LED-TP1, and pins COM0-COM7 of the LED driving chip U5 are respectively connected with common ends of each LED dot matrix of the dot matrix LED touch display screen LED-TP 1; and TK1-TK11 pins of the main control U1 are respectively connected with each touch signal output end of the dot-matrix LED touch display screen LED-TP 1.
In the above technical solution, the sensor module includes at least one flame sensor sub-module and at least one furnace temperature sensor sub-module; all the flame sensor sub-modules and the furnace temperature sensor sub-modules are in signal connection with the main control U1.
In the above technical solution, the sensor module includes a first flame sensor submodule, a second flame sensor submodule, a first furnace temperature sensor submodule, a second furnace temperature sensor submodule, a third furnace temperature sensor submodule, and a fourth furnace temperature sensor submodule; the first flame sensor sub-module comprises a thermistor D19 and a pull-up resistor R46, and a signal output end between the thermistor D19 and the pull-up resistor R46 is connected to an ADC input pin of the main control U1; the second flame sensor sub-module comprises a thermistor D21 and a pull-up resistor R47, and a signal output end between the thermistor D21 and the pull-up resistor R47 is connected to an ADC input pin of the main control U1; the first furnace temperature sensor submodule comprises a thermistor D3 and a pull-up resistor R3, and a signal output end between the thermistor D3 and the pull-up resistor R3 is connected to an ADC input pin of the main control U1; the second furnace temperature sensor submodule comprises a thermistor D4 and a pull-up resistor R4, and a signal output end between the thermistor D4 and the pull-up resistor R4 is connected to an ADC input pin of the main control U1; the third furnace temperature sensor submodule comprises a thermistor D9 and a pull-up resistor R24, and a signal output end between the thermistor D9 and the pull-up resistor R24 is connected to an ADC input pin of the main control U1; the fourth furnace temperature sensor sub-module comprises a thermistor D10 and a pull-up resistor R25, and a signal output end between the thermistor D10 and the pull-up resistor R25 is connected to an ADC input pin of the main control U1.
In the above technical solution, the valve control module includes at least one solenoid valve control submodule and at least one proportional valve control submodule; all the electromagnetic valve control submodules and the proportional valve control submodules are in signal connection with the main control U1.
In the above technical solution, the valve control module includes a first solenoid valve control submodule, a second solenoid valve control submodule, a first proportional valve control submodule, and a second proportional valve control submodule; the first electromagnetic valve control sub-module comprises a field effect tube Q3, the source electrode of the field effect tube Q3 is grounded, the drain electrode of the field effect tube Q3 is connected to a +24V power supply after passing through a diode D16, and the grid electrode of the field effect tube Q3 is connected to a universal input/output pin of the main control U1; the drain electrode of the field effect tube Q3 is used for being connected with the input end of the electromagnetic valve; the second solenoid valve control sub-module comprises a field effect transistor Q2, the source electrode of the field effect transistor Q2 is grounded, the drain electrode of the field effect transistor Q2 is connected to a +24V power supply after passing through a diode D15, and the grid electrode of the field effect transistor Q2 is connected to a general input/output pin of the main control U1; the drain electrode of the field effect tube Q2 is used for being connected with the input end of the electromagnetic valve; the first proportional valve control submodule comprises a field effect transistor Q4, the source electrode of the field effect transistor Q4 is grounded, the drain electrode of the field effect transistor Q4 is connected to a +24V power supply after passing through a diode D17, and the grid electrode of the field effect transistor Q4 is connected to a universal input/output pin of the main control U1; the drain electrode of the field effect transistor Q4 is used for being connected with the voltage control end of the proportional valve; the second proportional valve control submodule comprises a field effect transistor Q5, the source electrode of the field effect transistor Q5 is grounded, the drain electrode of the field effect transistor Q5 is connected to a +24V power supply after passing through a diode D18, and the grid electrode of the field effect transistor Q5 is connected to a universal input/output pin of the main control U1; the drain electrode of the field effect transistor Q5 is used for being connected with the voltage control end of the proportional valve.
Among the above-mentioned technical scheme, this kind of intelligence gas furnace control circuit still includes the buzzer module, the buzzer module with master control U1 signal connection.
In the above technical solution, the buzzer module includes a buzzer BZ1 and a triode Q1; the emitter of the transistor Q1 is grounded, and the base of the transistor Q1 is connected to the general input/output pin of the main control U1; one end of the buzzer BZ1 is connected with a +12V power supply, and the other end of the buzzer BZ1 is connected with the collector electrode of the triode Q1.
Compared with the prior art, the utility model has the beneficial effects that: the control circuit of the intelligent gas furnace comprises a touch control and display module, a sensor module and a valve control module which are respectively connected with a master control signal; ignition and fire power adjustment can be intelligently finished in an electronic mode, and the control is more convenient and accurate; the intelligent fire monitoring system has a furnace temperature sensing function and a flame sensing function, and can display parameters such as furnace temperature and firepower grade through the touch control and display module, so that the intelligent and integrated degrees are higher.
Drawings
Fig. 1 is a schematic circuit diagram of a master control in the present invention.
Fig. 2 is a first schematic circuit diagram of the touch control and display module according to the present invention.
Fig. 3 is a second schematic circuit diagram of the touch and display module according to the present invention.
Fig. 4 is a schematic circuit diagram of a valve control module according to the present invention.
Fig. 5 is a schematic circuit diagram of a sensor module according to the present invention.
Fig. 6 is a schematic circuit diagram of the buzzer module in the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An intelligent gas furnace control circuit can be applied to gas-fired furnaces such as kitchen stoves, water heaters and ovens, wherein the furnaces use electromagnetic valves as gas switches, proportional valves are used for controlling the spraying amount of gas so as to control the firepower, and electronic igniters are used for igniting the burners.
In this embodiment, this kind of intelligence gas furnace control circuit uses in the gas oven of two furnace ends.
The control circuit of the intelligent gas furnace comprises a main control U1, a touch and display module, a sensor module and a valve control module; the touch control and display module, the sensor module and the valve control module are respectively connected with the master control signal.
Referring to fig. 1, a main control U1 is an MCU such as a single chip microcomputer or an embedded chip; in this embodiment, the main control U1 is an 8-bit single chip microcomputer of which the model is HC89F3650, and the main control U1 uses an 8051 kernel and has a Capacitive Touch Key (CTK) detection circuit, which can support capacitive touch key input.
Pins 44-47 of the master control U1 are defined as TK1-TK4 respectively, pins 2-4 are defined as TK5-TK7 respectively, and pins 19-22 are defined as TK8-TK11 respectively, so that a capacitive touch key input function is realized; the pins 34 and 39 of the main control U1 are respectively defined as ADC22 and ADC17 to realize the analog input function; pin 25, pin 28-pin 31 of the master U1 are each defined as general purpose input/output pins.
Referring to fig. 2 and 3, in particular, the touch and display module includes an LED driving chip U5 and a dot matrix LED touch screen LED-TP 1.
The LED driving chip U5 is TM1680, and has the LED dot matrix display screen driving function and the serial communication function; the dot-matrix LED touch display screen LED-TP1 is provided with a dot-matrix LED display screen and a plurality of capacitive touch keys, and characters or figures such as ' ignition ', ' firepower + ', ' firepower- ' flameout ' and the like can be printed on the capacitive touch keys of the dot-matrix LED touch display screen LED-TP1 according to needs.
The LED driving chip U5 is connected to the master U1 in serial communication, specifically, the SDA pin and the SCL pin of the LED driving chip U5 are respectively connected to the serial communication pin of the master U1, and the serial communication pin of the master U1 is defined as I2C communication mode.
ROW0-ROW29 pins of an LED driving chip U5 are respectively connected with each LED lattice ROW driving input end of a lattice type LED touch display screen LED-TP1, COM0-COM7 pins of an LED driving chip U5 are respectively connected with each LED lattice common end of a lattice type LED touch display screen LED-TP 1; in this way, the LED driving chip U5 can drive the dot-matrix LED touch display screen LED-TP1 in parallel according to the host computer signal of the main control U1 to complete the display function.
Pins TK1-TK11 of the main control U1 are respectively connected with each touch signal output end of the dot-matrix LED touch display screen LED-TP1, and specifically, pins 44-47, 2-4 and 19-22 of the main control U1 are respectively connected with each touch signal output end of the dot-matrix LED touch display screen LED-TP1, so that the main control U1 can receive signals of each capacitive touch key of the dot-matrix LED touch display screen LED-TP 1.
Referring to fig. 4, the valve control module includes at least one solenoid valve control sub-module and at least one proportional valve control sub-module; all the solenoid valve control submodules and the proportional valve control submodules are in signal connection with the main control U1.
Specifically, the valve control module comprises a first electromagnetic valve control submodule, a second electromagnetic valve control submodule, a first proportional valve control submodule and a second proportional valve control submodule; the first electromagnetic valve control sub-module comprises a field-effect tube Q3, the source electrode of a field-effect tube Q3 is grounded, the drain electrode of a field-effect tube Q3 is connected to a +24V power supply after passing through a diode D16, and the grid electrode of a field-effect tube Q3 is connected to a universal input/output pin of a main control U1, specifically to a pin 31 of the main control U1; the drain electrode of the field effect tube Q3 is used for connecting the input end of the electromagnetic valve; the second electromagnetic valve control sub-module comprises a field-effect tube Q2, the source electrode of a field-effect tube Q2 is grounded, the drain electrode of a field-effect tube Q2 is connected to a +24V power supply after passing through a diode D15, and the grid electrode of a field-effect tube Q2 is connected to a universal input/output pin of the main control U1, specifically to a pin 30 of the main control U1; the drain electrode of the field effect tube Q2 is used for connecting the input end of the electromagnetic valve; the first proportional valve control sub-module comprises a field effect transistor Q4, the source electrode of a field effect transistor Q4 is grounded, the drain electrode of a field effect transistor Q4 is connected to a +24V power supply after passing through a diode D17, and the gate electrode of a field effect transistor Q4 is connected to a universal input/output pin of a main control U1, specifically to a pin 29 of the main control U1; the drain electrode of the field effect transistor Q4 is used for being connected with the voltage control end of the proportional valve; the second proportional valve control sub-module comprises a field effect transistor Q5, the source electrode of a field effect transistor Q5 is grounded, the drain electrode of a field effect transistor Q5 is connected to a +24V power supply after passing through a diode D18, and the grid electrode of a field effect transistor Q5 is connected to a universal input/output pin of a main control U1, specifically to a pin 28 of the main control U1; the drain of the field effect transistor Q5 is used for connecting the voltage control end of the proportional valve.
The first electromagnetic valve control submodule is used in cooperation with the first proportional valve control submodule, the first electromagnetic valve control submodule is used for controlling the on-off of an electromagnetic valve of one burner so as to control the on-off of gas, and the first proportional valve control submodule is used for controlling the opening of a proportional valve of the burner so as to control the ejection quantity of the gas and finally control the fire power of the burner; similarly, the second electromagnetic valve control submodule and the second proportional valve control submodule are matched for use, wherein the second electromagnetic valve control submodule is used for controlling the on-off of an electromagnetic valve of another burner so as to control the on-off of the fuel gas, and the second proportional valve control submodule is used for controlling the opening of a proportional valve of the burner so as to control the ejection quantity of the fuel gas and finally control the fire power of the burner.
A universal input/output pin of the main control U1 controls a field-effect tube Q3 of a first electromagnetic valve control submodule and a field-effect tube Q2 of a second electromagnetic valve control submodule in a level mode, and the on-off of the electromagnetic valves of the two furnace ends are respectively controlled by the on-off of the field-effect tube Q3 and the field-effect tube Q2; the universal input/output pin of the main control U1 controls the field effect tube Q4 of the first proportional valve control submodule and the field effect tube Q5 of the second proportional valve control submodule in a pulse mode, and the opening degree of the proportional valves of the two burners is controlled through the on-off time of the field effect tube Q3 and the on-off time of the field effect tube Q2 respectively, so that the ejection quantity of fuel gas is controlled, and finally the fire power of the burners is controlled.
Referring to FIG. 5, the sensor module includes at least one flame sensor sub-module and at least one furnace temperature sensor sub-module; all the flame sensor sub-modules and the furnace temperature sensor sub-modules are in signal connection with a main control U1.
Specifically, the sensor module comprises a first flame sensor submodule, a second flame sensor submodule, a first furnace temperature sensor submodule, a second furnace temperature sensor submodule, a third furnace temperature sensor submodule and a fourth furnace temperature sensor submodule; the first flame sensor submodule comprises a thermistor D19 and a pull-up resistor R46, and a signal output end between the thermistor D19 and the pull-up resistor R46 is connected to an ADC input pin of the main control U1, specifically to a pin 35 of the main control U1; the second flame sensor submodule comprises a thermistor D21 and a pull-up resistor R47, and a signal output end between the thermistor D21 and the pull-up resistor R47 is connected to an ADC input pin of the main control U1, specifically to a pin 34 of the main control U1; the first furnace temperature sensor submodule comprises a thermistor D3 and a pull-up resistor R3, and a signal output end between the thermistor D3 and the pull-up resistor R3 is connected to an ADC input pin of the main control U1, specifically to a pin 39 of a main control U1; the second furnace temperature sensor submodule comprises a thermistor D4 and a pull-up resistor R4, and a signal output end between the thermistor D4 and the pull-up resistor R4 is connected to an ADC input pin of the main control U1, specifically to the pin 38 of the main control U1; the third furnace temperature sensor submodule comprises a thermistor D9 and a pull-up resistor R24, and a signal output end between the thermistor D9 and the pull-up resistor R24 is connected to an ADC input pin of the main control U1, specifically to a pin 37 of the main control U1; the fourth furnace temperature sensor submodule comprises a thermistor D10 and a pull-up resistor R25, and a signal output end between the thermistor D10 and the pull-up resistor R25 is connected to an ADC input pin of the main control U1, specifically to the pin 36 of the main control U1.
The thermistor D19 of the first flame sensor submodule and the thermistor D21 of the second flame sensor submodule are both flame probes, and the two flame probes are respectively arranged at the hearts of the two burners and used for detecting whether flames are sprayed out from the two burners; the thermistor D3 of the first furnace temperature sensor submodule, the thermistor D4 of the second furnace temperature sensor submodule, the thermistor D9 of the third furnace temperature sensor submodule and the thermistor D10 of the fourth furnace temperature sensor submodule are all temperature probes, the temperature probes corresponding to the thermistor D3 and the thermistor D4 are respectively arranged at the furnace core and the periphery of one furnace end and used for respectively detecting the temperature of the furnace core and the temperature of the periphery, and similarly, the temperature probes corresponding to the thermistor D9 and the thermistor D10 are respectively arranged at the furnace core and the periphery of the other furnace end and used for respectively detecting the temperature of the furnace core and the temperature of the periphery.
Referring to fig. 6, further, the intelligent gas furnace control circuit further includes a buzzer module, and the buzzer module is in signal connection with the main control U1.
Specifically, the buzzer module comprises a buzzer BZ1 and a triode Q1; the emitter of the triode Q1 is grounded, and the base of the triode Q1 is connected to a general input/output pin of the main control U1, specifically to the pin 25 of the main control U1; one end of the buzzer BZ1 is connected with a +12V power supply, and the other end of the buzzer BZ1 is connected with the collector of the triode Q1; the general input/output pin of the main control U1 controls the triode Q1 in a level mode, and the start or non-start of the buzzer BZ1 is controlled by the on-off of the triode Q1.
The main control U1 is further connected to the two electronic igniters through two general input/output pins, respectively, to drive the electronic igniters to operate, and ignite the two burners, respectively.
When the control circuit of the intelligent gas furnace is used, through a plurality of capacitive touch keys of a dot-matrix LED touch display screen LED-TP1, instructions such as ' ignition ', ' firepower + ', ' firepower- ', flameout ' and the like can be sent to a main control U1; after receiving an ignition command, the main control U1 controls the opening of the corresponding electromagnetic valve through the electromagnetic valve control submodule to open the gas switch, controls the corresponding proportional valve to open at a certain opening degree through the proportional valve control submodule, and drives the electronic igniter to operate through the universal input/output pin to ignite the burner; after receiving the fire plus command, the main control U1 controls the corresponding proportional valve to increase the opening degree through the proportional valve control submodule, thereby increasing the jet rate of the fuel gas and finally increasing the fire; after receiving the 'firepower-' instruction, the main control U1 controls the corresponding proportional valve to reduce the opening degree through the proportional valve control submodule, so that the ejection quantity of the fuel gas is reduced, and finally the firepower is reduced; after receiving a flameout command, the main control U1 controls the corresponding electromagnetic valve to be closed through the electromagnetic valve control submodule so as to close the gas switch, and controls the corresponding proportional valve to be closed through the proportional valve control submodule so as to flameout the furnace end; in the process, the main control U1 detects whether the furnace core has flame through the flame sensor submodule, if the furnace core has no flame, the electromagnetic valve and the proportional valve are closed emergently, and a buzzer module is used for warning a user; in the process, the master control U1 respectively detects the temperature of the furnace core and the temperature of the periphery through the furnace temperature sensor submodule and displays the temperatures through the dot-matrix LED touch display screen LED-TP 1; the lattice type LED touch display screen LED-TP1 can also display the fire grade according to the opening degree of the proportional valve.
The control circuit of the intelligent gas furnace comprises a touch control and display module, a sensor module and a valve control module which are respectively connected with a master control signal; ignition and fire power adjustment can be intelligently finished in an electronic mode, and the control is more convenient and accurate; the intelligent fire monitoring system has a furnace temperature sensing function and a flame sensing function, and can display parameters such as furnace temperature and firepower grade through the touch control and display module, so that the intelligent and integrated degrees are higher.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. An intelligent gas furnace control circuit is characterized by comprising a main control U1, a touch and display module, a sensor module and a valve control module;
the touch control and display module, the sensor module and the valve control module are respectively connected with the master control signal.
2. The intelligent gas furnace control circuit of claim 1, wherein: the touch control and display module comprises an LED drive chip U5 and a dot matrix LED touch display screen LED-TP 1;
the LED driving chip U5 is in serial communication connection with the main control U1;
pins ROW0-ROW29 of the LED driving chip U5 are respectively connected with driving input ends of each LED dot matrix ROW of the dot matrix LED touch display screen LED-TP1, and pins COM0-COM7 of the LED driving chip U5 are respectively connected with common ends of each LED dot matrix of the dot matrix LED touch display screen LED-TP 1;
and TK1-TK11 pins of the main control U1 are respectively connected with each touch signal output end of the dot-matrix LED touch display screen LED-TP 1.
3. The intelligent gas furnace control circuit of claim 1, wherein: the sensor module comprises at least one flame sensor sub-module and at least one furnace temperature sensor sub-module;
all the flame sensor sub-modules and the furnace temperature sensor sub-modules are in signal connection with the main control U1.
4. The intelligent gas furnace control circuit of claim 3, wherein: the sensor module comprises a first flame sensor submodule, a second flame sensor submodule, a first furnace temperature sensor submodule, a second furnace temperature sensor submodule, a third furnace temperature sensor submodule and a fourth furnace temperature sensor submodule;
the first flame sensor sub-module comprises a thermistor D19 and a pull-up resistor R46, and a signal output end between the thermistor D19 and the pull-up resistor R46 is connected to an ADC input pin of the main control U1;
the second flame sensor sub-module comprises a thermistor D21 and a pull-up resistor R47, and a signal output end between the thermistor D21 and the pull-up resistor R47 is connected to an ADC input pin of the main control U1;
the first furnace temperature sensor submodule comprises a thermistor D3 and a pull-up resistor R3, and a signal output end between the thermistor D3 and the pull-up resistor R3 is connected to an ADC input pin of the main control U1;
the second furnace temperature sensor submodule comprises a thermistor D4 and a pull-up resistor R4, and a signal output end between the thermistor D4 and the pull-up resistor R4 is connected to an ADC input pin of the main control U1;
the third furnace temperature sensor submodule comprises a thermistor D9 and a pull-up resistor R24, and a signal output end between the thermistor D9 and the pull-up resistor R24 is connected to an ADC input pin of the main control U1;
the fourth furnace temperature sensor sub-module comprises a thermistor D10 and a pull-up resistor R25, and a signal output end between the thermistor D10 and the pull-up resistor R25 is connected to an ADC input pin of the main control U1.
5. The intelligent gas furnace control circuit of claim 1, wherein: the valve control module comprises at least one electromagnetic valve control submodule and at least one proportional valve control submodule;
all the electromagnetic valve control submodules and the proportional valve control submodules are in signal connection with the main control U1.
6. The intelligent gas furnace control circuit of claim 5, wherein: the valve control module comprises a first electromagnetic valve control submodule, a second electromagnetic valve control submodule, a first proportional valve control submodule and a second proportional valve control submodule;
the first electromagnetic valve control sub-module comprises a field effect transistor Q3, the source electrode of the field effect transistor Q3 is grounded, the drain electrode of the field effect transistor Q3 is connected to a +24V power supply after passing through a diode D16, and the grid electrode of the field effect transistor Q3 is connected to a general input/output pin of the main control U1; the drain electrode of the field effect tube Q3 is used for being connected with the input end of the electromagnetic valve;
the second solenoid valve control sub-module comprises a field effect transistor Q2, the source electrode of the field effect transistor Q2 is grounded, the drain electrode of the field effect transistor Q2 is connected to a +24V power supply after passing through a diode D15, and the grid electrode of the field effect transistor Q2 is connected to a general input/output pin of the main control U1; the drain electrode of the field effect tube Q2 is used for being connected with the input end of the electromagnetic valve;
the first proportional valve control submodule comprises a field effect transistor Q4, the source electrode of the field effect transistor Q4 is grounded, the drain electrode of the field effect transistor Q4 is connected to a +24V power supply after passing through a diode D17, and the grid electrode of the field effect transistor Q4 is connected to a universal input/output pin of the main control U1; the drain electrode of the field effect transistor Q4 is used for being connected with the voltage control end of the proportional valve;
the second proportional valve control submodule comprises a field effect transistor Q5, the source electrode of the field effect transistor Q5 is grounded, the drain electrode of the field effect transistor Q5 is connected to a +24V power supply after passing through a diode D18, and the grid electrode of the field effect transistor Q5 is connected to a universal input/output pin of the main control U1; the drain electrode of the field effect transistor Q5 is used for being connected with the voltage control end of the proportional valve.
7. The intelligent gas furnace control circuit of claim 1, wherein: the intelligent control device further comprises a buzzer module, and the buzzer module is in signal connection with the main control U1.
8. The intelligent gas furnace control circuit of claim 7, wherein: the buzzer module comprises a buzzer BZ1 and a triode Q1;
the emitter of the transistor Q1 is grounded, and the base of the transistor Q1 is connected to the general input/output pin of the main control U1;
one end of the buzzer BZ1 is connected with a +12V power supply, and the other end of the buzzer BZ1 is connected with the collector electrode of the triode Q1.
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| CN202123383133.6U CN216871045U (en) | 2021-12-30 | 2021-12-30 | Intelligent gas furnace control circuit |
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| CN202123383133.6U CN216871045U (en) | 2021-12-30 | 2021-12-30 | Intelligent gas furnace control circuit |
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