CN112099417A - Multifunctional range hood control circuit - Google Patents
Multifunctional range hood control circuit Download PDFInfo
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- CN112099417A CN112099417A CN202011128710.4A CN202011128710A CN112099417A CN 112099417 A CN112099417 A CN 112099417A CN 202011128710 A CN202011128710 A CN 202011128710A CN 112099417 A CN112099417 A CN 112099417A
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- 238000002955 isolation Methods 0.000 claims description 18
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- 238000010168 coupling process Methods 0.000 claims description 13
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- 230000003287 optical effect Effects 0.000 claims description 13
- 230000009467 reduction Effects 0.000 claims description 6
- 239000006096 absorbing agent Substances 0.000 abstract description 7
- 239000006233 lamp black Substances 0.000 abstract description 7
- 238000001914 filtration Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
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- 230000005686 electrostatic field Effects 0.000 description 1
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- 239000007789 gas Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses a multifunctional range hood control circuit, which is characterized in that: the device comprises an operation identification circuit, a main control circuit and a power supply module, wherein the operation identification circuit comprises a first MCU (microprogrammed control unit), a control key and a gesture identification circuit which are connected with the first MCU, and the first MCU is used for identifying key operation and gesture operation actions and outputting corresponding identification signals; the main control circuit comprises a second MCU, a driving module connected with the second MCU, and a switch module connected with the driving module, wherein the first MCU is connected with the second MCU. This control circuit adopts the design of a plurality of control button, a plurality of drive unit and switch element, and each independent executive device that each switch element can the independent control lampblack absorber corresponds each control button and one or more drive unit, has realized that a button corresponds a functional mode for the lampblack absorber can have multiple functional mode to supply the user to select, satisfies user's different user demands, and the user can a key switch functional mode, and it is more convenient to use.
Description
Technical Field
The invention relates to oil fume purification equipment, in particular to a multifunctional range hood control circuit.
Background
The range hood changes the large environment of a kitchen, can quickly exhaust oil smoke harmful to the kitchen environment and human bodies, discharges the oil smoke to the outside, reduces pollution, purifies air, and has the safety guarantee effects of gas defense and explosion prevention. Range hoods have become essential kitchen equipment for modern homes.
The existing range hood is single in function mode, each execution device (such as a fan, illumination and the like) of the range hood needs to be controlled through an independent control key, and a user needs to operate a plurality of control keys once to control the working state of each execution device, so that the function mode of the range hood is switched, the function mode of the range hood cannot be switched one key, and the range hood is inconvenient to use.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a multifunctional range hood control circuit which can switch the functional mode of a range hood by one key and is convenient for a user to use.
In order to achieve the purpose, the invention provides the following technical scheme:
a multifunctional range hood control circuit is characterized in that: the operation recognition circuit comprises a first MCU, a control key and a gesture recognition circuit, wherein the control key and the gesture recognition circuit are connected with the first MCU; the main control circuit comprises a second MCU, a driving module connected with the second MCU and a switch module connected with the driving module, wherein the second MCU is used for controlling the driving module, the driving module is used for controlling the switch action of the switch module, the first MCU is connected with the second MCU, the second MCU is used for receiving the identification signal output by the first MCU and controlling the driving module according to the received identification signal, so that the switch module is controlled to generate the switch action.
As a preferable scheme: the switch module comprises a plurality of switch units, the drive module comprises a plurality of drive units, the drive units correspond to the switch units one by one, and each drive unit is used for independently controlling the switch action of each switch unit.
As a preferable scheme: the gesture recognition circuit comprises an infrared transmitting module and an infrared receiving module, the infrared transmitting module adopts two groups of infrared signal transmitting lamps, the anodes of the infrared signal transmitting lamps are connected with a working power supply of the infrared signal transmitting lamps, and the cathodes of the infrared signal lamps are connected with a PWM signal output pin of the first MCU through a resistor R3; the infrared receiving circuit comprises two groups of infrared signal receiving heads, power pins of the infrared signal receiving heads are connected with working power supplies of the infrared signal receiving heads, grounding pins of the infrared signal receiving heads are grounded, and signal output pins of the infrared signal receiving heads are connected with I/O ends of the first MCU.
As a preferable scheme: the power module comprises a filter circuit, a rectifying circuit, a voltage reduction circuit and a voltage stabilizing circuit, wherein the rectifying circuit is a full-bridge rectifying circuit, the first input end of the rectifying circuit is connected with a live wire of a mains supply, the second input end of the rectifying circuit is connected with a zero line of the mains supply, the voltage reduction circuit comprises a power management chip, an optical coupling isolation chip and a high-frequency transformer T, a CS pin of the power management chip is connected with a second output pin of the rectifying circuit through a resistor R15, a SW pin of the power management chip is connected with the anode of a diode D5, a resistor R17 is connected with a capacitor C7 in series, the cathode of the diode D5 is connected with the other end of the resistor R17, and the other end of the capacitor C7; the COMP pin of the power management chip is connected with the collector of an optical coupling isolation chip, the emitter of the optical coupling isolation chip is grounded, the anode of the optical coupling isolation chip is connected with the anode of a voltage stabilizing diode DZ1, the cathode of the voltage stabilizing diode DZ1 is connected with a resistor R20, the other end of the resistor R20 outputs a +12V power supply, the cathode of the optical coupling isolation chip is grounded, a resistor R19 is connected between the anode and the cathode of the optical coupling isolation chip, one end of an input side coil of the transformer is connected with the SW pin of the power management chip, the other end of the input side coil of the transformer is connected with the first output end of a rectifying circuit, one end of an output side coil of the transformer is connected with the anode of a diode D7, the cathode of a diode D7 is connected with the +12V power supply, the other end of the output side coil of the transformer is grounded, and the, the input pin of the voltage stabilizing chip is connected with the cathode of a diode D7, the GND pin of the voltage stabilizing chip is grounded, the voltage stabilizing chip is connected with a capacitor C13, an electrolytic capacitor C14 is connected with the capacitor C13 in parallel, a capacitor C15 is connected between the No. 2 pin and the No. 3 pin of the voltage stabilizing chip, a capacitor C16 is connected with a capacitor C15 in parallel, and the No. 3 pin of the voltage stabilizing chip outputs a +5V power supply.
As a preferable scheme: the first input end of the rectifying circuit is connected with a live wire of the commercial power through a first coil of a common-mode inductor L, and the second input end of the rectifying circuit is connected with a zero line of the commercial power through a second coil of the common-mode inductor L.
As a preferable scheme: the filter circuit comprises a potentiometer R13, a capacitor C4 and a resistor R14, wherein the potentiometer R13, the capacitor C4 and the resistor R14 are all provided with one end connected with a live wire of a commercial power and the other end connected with a zero wire of the commercial power.
As a preferable scheme: the first MCU is further connected with a state indicating circuit, the state indicating circuit comprises an LED display screen, an LED indicating lamp and an LED driving module, the LED driving module is an LED driving chip, a DIO pin of the LED driving chip is connected with an I/O end of the first MCU, a CLK pin of the LED driving chip is connected with the I/O end of the first MCU, an STB pin of the LED driving chip is connected with the I/O end of the first MCU, each driving pin of the LED driving chip is connected with each interface of the LED display screen, an anode of the LED indicating lamp is connected with the driving pin of the LED driving chip, and a cathode of the LED indicating lamp is connected with the I/O end of the LED driving chip.
As a preferable scheme: the second MCU is further connected with a buzzer module, the buzzer module comprises a buzzer SP, two ends of the buzzer SP are connected with a resistor R21, one end of a resistor R21 is connected with a working power supply of the resistor, the other end of the resistor R21 is connected with the output end of a current amplifier, and the input end of the current amplifier is connected with the I/O end of the second MCU.
As a preferable scheme: the first MCU adopts a single chip microcomputer with the model number of SC93F 8333.
As a preferable scheme: the second MCU adopts a singlechip with the model number of NY8A 053D.
Compared with the prior art, the invention has the advantages that:
1. this control circuit adopts a plurality of control button, a plurality of drive unit and switch element's design, each drive unit is used for controlling each switch element respectively and produces the switching action, each independent executive device of each switch element can independent control lampblack absorber, each executive device cooperation realizes the various functional mode of lampblack absorber, through corresponding each control button with one or more drive unit, it corresponds a functional mode to have realized a button, make the lampblack absorber can have multiple functional mode to supply the user to select, satisfy user's different user demands, the user can switch functional mode by a key, and it is more convenient to use.
2. The touch control and gesture control double-click control function is adopted, so that a user can realize control by pressing a touch key, and the response is quicker and more accurate; and the control can be realized through the space gesture, the contact between the user and the equipment is avoided, the use is more flexible, the different use requirements of the user are met, and the humanization is realized.
Drawings
Fig. 1 is a schematic block diagram of a range hood control circuit in the present embodiment;
FIG. 2 is an operation identifying circuit in the present embodiment;
FIG. 3 is a state indicating circuit in the present embodiment;
FIG. 4 is a diagram of a voltage transforming and rectifying circuit of the power supply module in the present embodiment;
FIG. 5 is a diagram of a power management and voltage regulator circuit of the power module in this embodiment;
fig. 6 is a control and drive circuit diagram in this embodiment.
Detailed Description
Referring to fig. 1, a multifunctional range hood control circuit includes an operation recognition circuit, a main control circuit and a power module.
The operation recognition circuit comprises a first MCU, a control key and a gesture recognition circuit, wherein the control key and the gesture recognition circuit are connected with the first MCU, the control key is used for being pressed or touched by a user, the gesture recognition circuit is used for sensing an operation gesture of the user, and the first MCU is used for recognizing key operation and gesture operation actions and outputting corresponding recognition signals.
The main control circuit comprises a second MCU, a driving module connected with the second MCU and a switch module connected with the driving module, wherein the second MCU is used for controlling the working state of the driving module, and the driving module is used for controlling the switch module to generate switch action.
The first MCU is connected with the second MCU, and the second MCU is used for receiving the identification signal output by the second MCU and controlling the driving module according to the received identification signal, thereby controlling the switch module to generate switch action.
The first MCU is also connected with a state indicating circuit, and the state indicating circuit is used for displaying each functional mode of the range hood.
The second MCU is also connected with a buzzer module.
The power module is used for supplying power to the operation identification circuit and the main control circuit.
The switch module in this embodiment includes a plurality of switch units, and the drive module includes a plurality of drive units, and the drive units correspond to the switch units one to one, and each drive unit is used for controlling the switching action of each switch unit alone. Each switch unit is respectively connected in power supply loops of an oil slinger, a heating pipe, an outer exhaust fan, an electrostatic field, an ultraviolet lamp and the like of the range hood, and the start and stop of each execution device of the range hood can be controlled by controlling the on and off of each switch unit.
The switch unit adopts a relay unit, and the drive unit adopts an amplifying circuit.
Referring to fig. 2, in this embodiment, the first MCU is a single chip microcomputer of a model SC93F8333, the infrared emission module in this embodiment adopts two sets of infrared signal emission lamps, that is, an infrared signal emission lamp LELIR1 and an infrared signal emission lamp LELIR2, an anode of LELIR1 is connected to a +5V power supply, and a cathode of LELIR1 is connected to a pin No. 28 (that is, a PWM signal output pin) of the first MCU through a resistor R3; the positive pole of LELIR2 connects the +5V power, and the negative pole of LELIR2 passes through resistance R2 and connects first MCU's No. 28 pins.
When the circuit works, the No. 28 pin of the first MCU sends a PWM signal to the negative electrode of the infrared signal emission lamp, the voltage amplitude of the PWM signal is lower than 5V, and the electricity at the two ends of the infrared signal emission lamp changes along with the change of the high and low levels of the PWM signal, namely the infrared signal lamp changes alternately in light and shade, so that an infrared pulse signal is sent.
The infrared receiving circuit comprises two groups of infrared signal receiving heads, namely an infrared signal receiving head IR1 and an infrared signal receiving head IR2, power supply pins of the IR1 and the IR2 are both connected with a +5V power supply, grounding pins of the IR1 and the IR2 are both grounded, a signal output pin of the IR1 is connected with a pin No. 10 (I/O end) of the first MCU, and a signal output pin of the IR2 is connected with a pin No. 13 (I/O end) of the first MCU.
Two groups of infrared signal transmitting lamps and infrared signal receiving heads are arranged to improve the accuracy of detecting gestures. Only when the two infrared signal receiving heads output high level to the first MCU at the same time, the gesture is judged to be effective.
The touch key A1 is connected with a No. 27 pin (I/O end) of the first MCU through a pull-up resistor R4; the touch key A2 is connected with a No. 26 pin (I/O end) of the first MCU through a pull-up resistor R5; the touch key A3 is connected … … with the No. 25 pin (I/O terminal) of the first MCU through a pull-up resistor R6, and the touch key A9 is connected with the No. 15 pin (I/O terminal) of the first MCU through a pull-up resistor R12. The number of the touch keys is determined according to specific requirements and can be increased or decreased.
The touch and gesture recognition circuit further comprises a wiring terminal CON4, a pin No. 9 (signal output end) of the first MCU is connected with a port No. 1 of CON4 through a resistor R1, the port No. 1 is used for being connected with external signal receiving equipment, a pin No. 1 (VDD) of the first MCU is connected with a port No. 3 of CON4, the port No. 3 is connected with +5V, a pin No. 2 (CMOD) of the first MCU is grounded through a capacitor C3, a pin No. 1 (VSS) of the first MCU is grounded, the pin No. 1 (VDD) of the first MCU is also grounded through a capacitor C2, the pin No. 1 (VDD) of the first MCU is also connected with the anode of an electrolytic capacitor C1, the cathode of C1 is grounded, and the anode of C1 is also connected with a +5V power supply.
The capacitor C3, the capacitor C2 and the electrolytic capacitor C1 all play a role of filtering.
The operating principle of the operation identification circuit is as follows: when a user operates the touch key, the first MCU of the touch key feeds back a touch level signal, otherwise, when the user does not operate the touch key, the touch key does not feed back the touch level signal to the first MCU, and therefore whether the user performs touch operation or not is judged.
When a person makes a relevant gesture with a hand, for example, the hand is placed in front of the infrared signal emitting lamp, the red pulse signal is reflected, the reflected infrared pulse signal is received by the infrared signal receiving head, so that the infrared signal receiving head outputs a high-level signal to the first MCU, the fact that the user makes a control gesture can be judged, and gesture recognition is achieved.
Referring to fig. 3, the status indication circuit in this embodiment includes an LED display screen, an LED indicator lamp, and an LED driving module. The LED driving module adopts an LED driving chip with the model TM 1668. No. 1 pin (DIO) of the LED driving chip is connected with No. 22 pin (I/O end) of the first MCU, No. 2 pin (CLK) of the LED driving chip is connected with No. 21 pin (I/O end) of the first MCU, and No. 3 pin (STB) of the LED driving chip is connected with No. 20 pin (I/O end) of the first MCU. Pins (driving pins) 7, 8, 9, 10, 11, 23 and 24 of the LED driving chip are respectively connected with interfaces 3, 4, 5, 6, 7, 1 and 2 of the LED display screen. No. 6 pin (VDD) of the LED driving chip is connected with a +5V power supply, No. 22 pin of the LED driving chip is grounded, and the LED driving chip drives the LED display screen to display control information.
The indicator lamp comprises an LED1, an LED2 … … and an LED 10. The number of indicator lights is case specific. Take LED1 indicator light as an example: the anode of the LED1 indicator light is connected with the No. 12 pin (driving pin) of the LED driving chip, and the cathode of the LED1 is connected with the No. 21 pin (I/O end) of the LED driving chip. The connection of the other groups of LEDs is shown in FIG. 3, which is not further described!
When pin No. 12 of the LED driving chip outputs a high level and pin No. 21 of the LED driving chip outputs a low level, the indicator LED1 lights up, otherwise the LED1 remains in a turned-off state. Whether the touch operation and the gesture operation are successfully recognized or not is indicated through the LED indicating lamps.
Referring to fig. 4 and 5, the power module includes a filter circuit, a common mode inductor, a rectifier circuit, a voltage reduction circuit, and a voltage stabilization circuit.
The rectifying circuit is a full-bridge rectifying circuit formed by diodes D1, D2, D3 and D4, a first input end of the rectifying circuit is connected with a live wire of a commercial power through a first coil of a common-mode inductor L, and a second input end of the rectifying circuit is connected with a zero wire of the commercial power through a second coil of the common-mode inductor L. The common mode inductor L has the function of improving the anti-electromagnetic interference performance of the power supply module, and is convenient for passing EMC tests.
In other embodiments, the common mode inductor L may be eliminated, and the first input terminal of the rectifier circuit is directly connected to the live line of the utility power, and the second input terminal of the rectifier circuit is directly connected to the zero line of the utility power.
A capacitor C5 is connected between the first input end and the second input end of the rectifying circuit, and an electrolytic capacitor C6 is connected between the first output end and the second output end of the rectifying circuit. The capacitors C5 and C6 function for pre-rectification filtering and post-rectification filtering, respectively.
The filter circuit comprises a potentiometer R13, a capacitor C4 and a resistor R14, wherein the potentiometer R13, the capacitor C4 and the resistor R14 are all connected with a live wire of the commercial power at one end and a zero line of the commercial power at the other end.
In addition, still be connected with FUSE between commercial power live wire and the first input end of rectifier circuit, when the electric current was too big, FUSE can FUSE to play the effect of protection whole circuit, avoid the circuit to burn out because of the short circuit.
The voltage reduction circuit comprises a power management chip with the model of PN8149, an optical coupling isolation chip with the model of PC817 and a high-frequency transformer T with the model of EF 20. A resistor R15 is connected between a pin 1 (CS) and a pin 2 (GND) of the power management chip, the pin 2 (GND) of the power management chip is connected with a second output pin of the rectifying circuit, a pin 3 (VDD) of the power management chip is grounded through a capacitor C11, an electrolytic capacitor C10 is connected with the C11 in parallel, a pin 4 (COMP) of the power management chip is grounded through a capacitor C12, a pin 7 (SW) of the power management chip is connected with a pin 8 (SW), the pin 8 (SW) of the power management chip is connected with the anode of a diode D5, a resistor R17 is connected with the capacitor C7 in series, the cathode of the diode D5 is connected with the other end of a resistor R17, and the other end of the capacitor C7 is connected with a first output end of the rectifying circuit.
No. 4 pin (COMP) of power management chip is connected with the collecting electrode of opto-coupler isolation chip, the projecting pole ground connection of opto-coupler isolation chip, the positive pole of opto-coupler isolation chip is connected with zener diode DZ 1's positive pole, zener diode DZ 1's negative pole connecting resistance R20, resistance R20's other end output +12V power, the negative pole ground connection of opto-coupler isolation chip is connected with resistance R19 between opto-coupler isolation chip's positive pole and the negative pole. The output +12V power supply is used for supplying power to the relay unit and is used as an input power supply of the voltage stabilizing circuit.
The No. 3 pin of the power management chip is connected with the cathode of the diode D6 through a resistor R18, and the anode of the diode D6 is grounded.
One end of a high-voltage side coil Q1 of the transformer T is connected with a pin No. 8 (SW) of the power management chip, the other end of a coil Q1 is connected with a first output end of the rectifying circuit, a capacitor C8 is connected with a capacitor C9 in series, the other end of a capacitor C8 is connected with the first output end of the rectifying circuit, the other end of a capacitor C9 is grounded, one end of a high-voltage side coil Q2 of the transformer T is grounded, the other end of Q2 is connected with the anode of a diode D6, the cathode of the diode D6 is connected with a pin No. 3 (VDD) of the power management chip through a resistor R18, one end of a low-voltage side coil Q3 of the transformer T is connected with the anode of a diode D7, and the cathode.
The voltage stabilizing circuit comprises a voltage stabilizing chip, the model of the voltage stabilizing chip is 7805, a +12V power supply is connected with a pin No. 1 of the voltage stabilizing chip, the other end of a coil Q3 is connected with a pin No. 2 of the voltage stabilizing chip, the pin No. 2 of the voltage stabilizing chip is grounded, a capacitor C13 is connected with the voltage stabilizing chip, an electrolytic capacitor C14 is connected with the capacitor C13 in parallel, a capacitor C15 is connected between the pin No. 2 and the pin No. 3 of the voltage stabilizing chip, a capacitor C16 is connected with the capacitor C15 in parallel, and the pin No. 3 of the voltage stabilizing chip outputs the +5V power supply.
The working principle of the power supply module is as follows: commercial power alternating current passes through the filtering of filter circuit, common mode inductor's choke and filtering in proper order, and then by rectifier bridge with high-voltage alternating current conversion low-voltage direct current, low-voltage direct current is input to coil Q1's one end, and the SW pin output pulse voltage of power management chip simultaneously for produce the alternating current on defeated coil Q1, after the step-down of transformer, produce the alternating current that the voltage is lower on coil Q3, the alternating current on coil Q3 becomes the direct current after diode D7's rectification, export +5V DC power supply at No. 3 pin (Vout) of voltage stabilizing chip. The +5V power supply is used for supplying power to the first MCU, the second MCU, the LED driving chip and other components.
Referring to fig. 6, the second MCU in this embodiment adopts a single chip microcomputer of type NY8a053D, and the driving module includes current amplifiers a1, a2, A3 … … a 9. Correspondingly, the relay units are J1, J2, J3 … … J9. The input end of the current amplifier A1 is connected with the No. 14 pin (I/O end) of the second MCU, the output end of the current amplifier A1 is connected with the coil of the relay J1, and the relay J1 is also connected with a +12V working power supply. As shown in fig. 4, the switch contact of the relay J1 is connected in the power supply circuit of the heating tube of the range hood. The connection of the relays J2-J9 can be derived from FIGS. 6 and 4 and is not described in detail!
The buzzer module comprises a buzzer SP, two ends of the buzzer SP are connected with a resistor R21, one end of a resistor R21 is connected with a +12V power supply, the other end of the resistor R21 is connected with the output end of a current amplifier A10, and the input end of the current amplifier A10 is connected with a No. 8 pin (I/O end) of the second MCU.
The main control circuit further comprises a connection terminal CN12, a pin No. 7 (RST) of the second MCU is connected with a port No. 1 of the connection terminal CN12 through a resistor R23, a port No. 1 of CN12 is connected with a +5V power supply, a pin No. 7 (RST) of the second MCU is connected with a port No. 3 of the connection terminal CN12 through a resistor R25, a port No. 3 of CN12 is used for receiving a level signal sent by the first MCU, the positive electrode of an electrolytic capacitor C18 is connected with the +5V power supply, the negative electrode of the electrolytic capacitor C18 is grounded, one end of a capacitor C17 is connected with the pin No. 7 (RST) of the second MCU, the other end of the capacitor C17 is grounded, and a pin No. 2 (GND) of.
The working principle of the multifunctional smoke ventilator control circuit is as follows: the method comprises the steps that a user touches an operation key (any key in A1-A9, each key represents a working mode), the first MCU recognizes the operation of the user and outputs a level signal corresponding to the operation to the second MCU, after the second MCU receives the level signal, an I/O port connected with a corresponding current amplifier (one or more current amplifiers) outputs a high level signal, the current amplifier amplifies the high level signal and outputs an amplified driving current, the driving current flows into a coil of the relay, a switch contact of the relay is closed, the power supply of a corresponding execution device is connected, the corresponding execution device starts to work, and the range hood function mode selected by the user at present is pressed through the cooperation of the execution devices. The user can switch the lampblack absorber to different functional modes by pressing different cases or making different gestures, and the multifunctional lampblack absorber control circuit can meet different use requirements of the user.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. A multifunctional range hood control circuit is characterized in that: the operation recognition circuit comprises a first MCU, a control key and a gesture recognition circuit, wherein the control key and the gesture recognition circuit are connected with the first MCU; the main control circuit comprises a second MCU, a driving module connected with the second MCU and a switch module connected with the driving module, wherein the second MCU is used for controlling the driving module, the driving module is used for controlling the switch action of the switch module, the first MCU is connected with the second MCU, the second MCU is used for receiving the identification signal output by the first MCU and controlling the driving module according to the received identification signal, so that the switch module is controlled to generate the switch action.
2. The control circuit of claim 1, wherein: the switch module comprises a plurality of switch units, the drive module comprises a plurality of drive units, the drive units correspond to the switch units one by one, and each drive unit is used for independently controlling the switch action of each switch unit.
3. The control circuit of claim 1, wherein: the gesture recognition circuit comprises an infrared transmitting module and an infrared receiving module, the infrared transmitting module adopts two groups of infrared signal transmitting lamps, the anodes of the infrared signal transmitting lamps are connected with a working power supply of the infrared signal transmitting lamps, and the cathodes of the infrared signal lamps are connected with a PWM signal output pin of the first MCU through a resistor R3; the infrared receiving circuit comprises two groups of infrared signal receiving heads, power pins of the infrared signal receiving heads are connected with working power supplies of the infrared signal receiving heads, grounding pins of the infrared signal receiving heads are grounded, and signal output pins of the infrared signal receiving heads are connected with I/O ends of the first MCU.
4. The control circuit of claim 1, wherein: the power module comprises a filter circuit, a rectifying circuit, a voltage reduction circuit and a voltage stabilizing circuit, wherein the rectifying circuit is a full-bridge rectifying circuit, the first input end of the rectifying circuit is connected with a live wire of a mains supply, the second input end of the rectifying circuit is connected with a zero line of the mains supply, the voltage reduction circuit comprises a power management chip, an optical coupling isolation chip and a high-frequency transformer T, a CS pin of the power management chip is connected with a second output pin of the rectifying circuit through a resistor R15, a SW pin of the power management chip is connected with the anode of a diode D5, a resistor R17 is connected with a capacitor C7 in series, the cathode of the diode D5 is connected with the other end of the resistor R17, and the other end of the capacitor C7; the COMP pin of the power management chip is connected with the collector of an optical coupling isolation chip, the emitter of the optical coupling isolation chip is grounded, the anode of the optical coupling isolation chip is connected with the anode of a voltage stabilizing diode DZ1, the cathode of the voltage stabilizing diode DZ1 is connected with a resistor R20, the other end of the resistor R20 outputs a +12V power supply, the cathode of the optical coupling isolation chip is grounded, a resistor R19 is connected between the anode and the cathode of the optical coupling isolation chip, one end of an input side coil of the transformer is connected with the SW pin of the power management chip, the other end of the input side coil of the transformer is connected with the first output end of a rectifying circuit, one end of an output side coil of the transformer is connected with the anode of a diode D7, the cathode of a diode D7 is connected with the +12V power supply, the other end of the output side coil of the transformer is grounded, and the, the input pin of the voltage stabilizing chip is connected with the cathode of a diode D7, the GND pin of the voltage stabilizing chip is grounded, the voltage stabilizing chip is connected with a capacitor C13, an electrolytic capacitor C14 is connected with the capacitor C13 in parallel, a capacitor C15 is connected between the No. 2 pin and the No. 3 pin of the voltage stabilizing chip, a capacitor C16 is connected with a capacitor C15 in parallel, and the No. 3 pin of the voltage stabilizing chip outputs a +5V power supply.
5. The control circuit of the multifunctional range hood as claimed in claim 4, wherein: the first input end of the rectifying circuit is connected with a live wire of the commercial power through a first coil of a common-mode inductor L, and the second input end of the rectifying circuit is connected with a zero line of the commercial power through a second coil of the common-mode inductor L.
6. The control circuit of the multifunctional range hood as claimed in claim 4, wherein: the filter circuit comprises a potentiometer R13, a capacitor C4 and a resistor R14, wherein the potentiometer R13, the capacitor C4 and the resistor R14 are all provided with one end connected with a live wire of a commercial power and the other end connected with a zero wire of the commercial power.
7. The control circuit of claim 1, wherein: the first MCU is further connected with a state indicating circuit, the state indicating circuit comprises an LED display screen, an LED indicating lamp and an LED driving module, the LED driving module is an LED driving chip, a DIO pin of the LED driving chip is connected with an I/O end of the first MCU, a CLK pin of the LED driving chip is connected with the I/O end of the first MCU, an STB pin of the LED driving chip is connected with the I/O end of the first MCU, each driving pin of the LED driving chip is connected with each interface of the LED display screen, an anode of the LED indicating lamp is connected with the driving pin of the LED driving chip, and a cathode of the LED indicating lamp is connected with the I/O end of the LED driving chip.
8. The control circuit of claim 1, wherein: the second MCU is further connected with a buzzer module, the buzzer module comprises a buzzer SP, two ends of the buzzer SP are connected with a resistor R21, one end of a resistor R21 is connected with a working power supply of the resistor, the other end of the resistor R21 is connected with the output end of a current amplifier, and the input end of the current amplifier is connected with the I/O end of the second MCU.
9. The control circuit of claim 1, wherein: the first MCU adopts a single chip microcomputer with the model number of SC93F 8333.
10. The control circuit of claim 1, wherein: the second MCU adopts a singlechip with the model number of NY8A 053D.
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| CN202011128710.4A CN112099417A (en) | 2020-10-21 | 2020-10-21 | Multifunctional range hood control circuit |
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| CN202011128710.4A CN112099417A (en) | 2020-10-21 | 2020-10-21 | Multifunctional range hood control circuit |
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| EP4092334A3 (en) * | 2021-05-21 | 2023-02-22 | Berbel Ablufttechnik GmbH | Fume extractor, especially fume extractor hood |
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