CN110542138A - method and system for automatically controlling range hood through infrared temperature induction - Google Patents
method and system for automatically controlling range hood through infrared temperature induction Download PDFInfo
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- CN110542138A CN110542138A CN201910943489.9A CN201910943489A CN110542138A CN 110542138 A CN110542138 A CN 110542138A CN 201910943489 A CN201910943489 A CN 201910943489A CN 110542138 A CN110542138 A CN 110542138A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000006698 induction Effects 0.000 title claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 230000033228 biological regulation Effects 0.000 claims abstract description 7
- 230000001276 controlling effect Effects 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 12
- 230000011218 segmentation Effects 0.000 claims description 10
- 230000003111 delayed effect Effects 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 description 20
- 230000000087 stabilizing effect Effects 0.000 description 3
- 102100024061 Integrator complex subunit 1 Human genes 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
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Classifications
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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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Abstract
The invention relates to a method and a control system for automatically controlling a range hood by infrared temperature induction. The invention adopts the technical scheme that the temperature rise value of a gas stove is detected in real time, segmented circulation processing is carried out through a single chip microcomputer chip, the temperature rise value read in real time in the previous section is stored, the temperature rise value read again in the next section is compared with the temperature rise value read in the previous section to form circulation, and the opening, the speed regulation and the closing of the range hood are controlled according to the times that the temperature rise value in a set time period reaches a program set value. And a control system for automatically controlling the range hood by using the infrared temperature induction control method. The invention has the advantages that: 1. the processing speed is high; 2. the adjustability is high; 3. the cleaning is easy; 4. the detection range is large; 5. the power consumption is low and the stability is high; 6. the safety is high.
Description
Technical Field
the invention relates to the technical field of range hoods, in particular to a method and a control system for automatically controlling a range hood through infrared temperature induction.
background
a range hood is a kitchen appliance for purifying the kitchen environment. The smoke exhaust ventilator is arranged above a kitchen range of a healthy energy-saving kitchen range hood, can rapidly exhaust waste burnt by the kitchen range and oil smoke harmful to human bodies generated in the cooking process, and exhaust the waste and the oil smoke to the outside, reduces pollution, purifies air, and has the safety guarantee effects of gas defense and explosion prevention.
With the improvement of automation level, the existing range hood also begins to add elements of automation control. The existing automatic-opening range hood on the market consists of a gas sensor and a processing driving circuit, wherein the system mainly depends on the gas sensor to output a signal to the processing driving circuit to open when sensing gas smoke, the sensed gas smoke quantity is regulated, and the gas is sensed to be not gas and is delayed to close; and because there is certain distance between the collection petticoat pipe of range hood and the quilt heater, when the oil smoke volume is less, the oil smoke can't arrive in time and trigger the oil smoke sensor, and then the phenomenon that range hood did not start when appearing producing the oil smoke.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a method and a control system for automatically controlling a range hood through infrared temperature induction, wherein the method and the control system are simple in control principle, free of oil smoke influence, free of distance induction, accurate in induction and high in processing speed.
the method for automatically controlling the range hood by infrared temperature sensing adopts the technical scheme that the method is characterized in that the temperature rise value of a gas stove is detected in real time, segmented cycle processing is carried out through a single chip, the temperature rise value read in real time in the previous segment is stored, the temperature rise value read again in the next segment is compared with the temperature rise value read in the previous segment to form a cycle, and the range hood is controlled to be opened, regulated and closed according to the times that the temperature rise value in a set time period reaches a program set value.
When the number of times that the temperature rise value in the set time period reaches the minimum value of the temperature rise value of each section of data in the lowest real-time segmentation process is greater than a program set value, the range hood is started;
After the range hood is started, the number of times that the temperature rise value reaches the minimum value of the temperature rise value of each section of data in the lowest real-time segmentation process in a set time period is larger than a program set value, the rotating speed of the range hood is increased, and the number of times that the temperature rise value reaches the minimum value of the temperature rise value of each section of data in the lowest real-time segmentation process in the set time period is smaller than or equal to the program set value, and the rotating speed of the range hood is decreased;
And when the number of times that the temperature rise value reaches the specified value in the set time period is less than a program set value under the condition that the rotating speed of the range hood is slowed is met, the range hood is turned off in a delayed mode.
The invention relates to a control system of an infrared temperature sensing automatic control range hood, which adopts the technical scheme that the control system is characterized by comprising a voltage-stabilizing input power supply, a voltage-reducing circuit, a main infrared temperature sensor, an auxiliary infrared temperature sensor, a main singlechip, an auxiliary singlechip, a central singlechip, a manual automatic switching port, a protection detection circuit and a control output circuit, wherein the voltage-stabilizing input power supply supplies power to the main singlechip, the auxiliary singlechip, a central processing singlechip, the manual automatic switching port, the protection detection circuit and the control output circuit, and the voltage-stabilizing input power supply supplies power to the main infrared temperature sensor and the auxiliary infrared temperature sensor after passing through the voltage-reducing circuit;
The main infrared temperature sensor and the auxiliary infrared temperature sensor are used for reading a temperature rise value of the stove changing in real time and are respectively connected with the main singlechip and the auxiliary singlechip through SMBUS protocol signal lines, and the main singlechip and the auxiliary singlechip are respectively used for receiving the real-time temperature rise values transmitted by the main infrared temperature sensor and the auxiliary infrared temperature sensor, converting the real-time temperature rise values into integer temperature data, performing cyclic processing and outputting signals;
The main singlechip, the auxiliary singlechip, the protection detection circuit and the control output circuit are all connected with the central processing singlechip, and the central processing singlechip is used for processing, calculating, detecting, confirming and outputting relevant signals of opening, speed regulation and delayed closing of the protection output range hood;
the automatic control smoke ventilator is characterized in that the manual and automatic switching port, the protection detection circuit and the control output circuit are connected with one another, the manual and automatic switching port is used for controlling manual control and automatic control switching of the smoke ventilator, the protection detection circuit is used for preventing manual control and automatic control from working simultaneously, and the control output circuit is used for controlling opening and closing of a relay of the smoke ventilator so as to control opening, speed regulation and closing of the smoke ventilator.
The voltage stabilizing input power supply supplies power for the voltage stabilizing input 5V, and the voltage reducing circuit reduces the voltage of the voltage stabilizing input power supply by 0.8V-1.0V for supplying power.
the voltage reduction circuit comprises an R1 resistor, an R2 resistor and a Q10 triode.
the manual automatic switching port comprises a normally closed 2 nd pin and a normally closed 3 rd pin of a K1 starting relay, a normally open 3 rd pin and a normally open 4 th pin of a K2 fast relay, a normally open 3 rd pin and a normally open 4 th pin of a K3 slow relay and an input end of an optical coupler.
The protection detection circuit comprises a coil anode, a 2 nd pin, a 3 rd pin, a 5 th pin and a 6 th pin of a K1 starting relay, a coil anode, a 6 th pin and a 7 th pin of a K2 quick relay, and a coil anode, a 6 th pin and a 7 th pin of a K3 slow relay.
the control output circuit comprises a Q4 triode and a Q12 triode corresponding to the K1 starting relay, a Q5 triode corresponding to the K2 quick relay, a Q6 triode corresponding to the K3 slow relay, a D1 diode connected in parallel with the K1 starting relay coil, a D2 diode connected in parallel with the K2 quick relay coil and a D3 diode connected in parallel with the K3 slow relay coil.
the main infrared temperature sensor and the auxiliary infrared temperature sensor both adopt MLX90614AAA type infrared temperature sensors.
the main singlechip, the auxiliary singlechip and the central singlechip are STC89C52RC chips.
the method and the control system for automatically controlling the range hood by infrared temperature induction have the advantages that:
1, the processing speed is high, and the data transmitted back in real time through infrared temperature is calculated and processed by a main single chip microcomputer chip and an auxiliary single chip microcomputer chip within 300 milliseconds of starting output driving through calculation, detection and processing of a central single chip microcomputer chip;
2, the adjustability is high, and the programs, numerical values and the like of the main single chip, the auxiliary single chip and the central single chip can be adjusted according to requirements;
3, the infrared temperature sensor is easy to clean, and after the infrared temperature sensor is polluted by oil smoke, the surface of the MLX90614AAA is made of a mirror material, so that the cleaning is convenient and is not influenced by the oil smoke;
4, the detection range is large, and the system can detect the temperature rise change in 80 centimeters;
The system has the advantages that 5 power consumption is low, stability is high, the normal working life of a singlechip chip STC89C52RC is 15-20 years, and the power consumption is low, the power consumption for driving the output of a 3-chip singlechip STC89C52RC of the system to start work is within 150 milliamperes, a relay is a 5V miniature relay (reducing 0.1-0.2V) and is about 4.8-4.9V, the power consumption of a sensor MLX90614AAA is within a few milliamperes, the total system power consumption during work is within 150 milliamperes, and the standby is within 30 milliamperes;
6, the safety is high, the voltage state of the output triode drive relay is detected through a program in a single chip microcomputer STC89C52RC (processing), the system is closed in real time, and the work state (2.9V-system voltage) can be stopped and indicated immediately when the system is in a standby (1.1V-system voltage) work state.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic diagram of the structure of an infrared temperature sensing automatic control range hood control system of the present invention;
FIG. 2 is a circuit schematic of the voltage step-down circuit of the present invention;
FIG. 3 is a circuit schematic of the present invention for manual-automatic port switching;
FIG. 4 is a circuit schematic of the protection detection circuit of the present invention;
FIG. 5 is a circuit schematic of the control output circuit of the present invention;
Fig. 6 is a circuit diagram of an infrared temperature sensing automatic control smoke exhaust ventilator control system of the present invention.
Detailed Description
The invention relates to a method for automatically controlling a range hood by infrared temperature induction, which comprises the following steps: the temperature rise value of the gas cooker is detected in real time, segmented circulation processing is carried out through a single chip microcomputer chip, the temperature rise value read in real time in the previous section is stored, the temperature rise value read again in the next section is compared with the temperature rise value read in the previous section to form circulation, and the opening, the speed regulation and the closing of the range hood are controlled according to the number of times that the temperature rise value reaches the program set value in the set time period.
the basic logic of control is as follows: when the number of times that the temperature rise value in the set time period reaches the minimum value of the temperature rise value of each section of data in the lowest real-time segmentation process is greater than a program set value, the range hood is started; after the range hood is started, the number of times that the temperature rise value reaches the minimum value of the temperature rise value of each section of data in the lowest real-time segmentation process in a set time period is larger than a program set value, the rotating speed of the range hood is increased, and the number of times that the temperature rise value reaches the minimum value of the temperature rise value of each section of data in the lowest real-time segmentation process in the set time period is smaller than or equal to the program set value, and the rotating speed of the range hood is decreased; and when the number of times that the temperature rise value reaches the specified value in the set time period is less than a program set value under the condition that the rotating speed of the range hood is slowed is met, the range hood is turned off in a delayed mode.
As shown in fig. 1-5, a control system of an infrared temperature sensing automatic control range hood using the above control method comprises a voltage-stabilizing input power supply 1, a voltage-reducing circuit 2, a main infrared temperature sensor 3, a secondary infrared temperature sensor 4, a main singlechip 5, a secondary singlechip 6, a central singlechip 7, a manual-automatic switching port 8, a protection detection circuit 9 and a control output circuit 10, wherein the voltage-stabilizing input power supply 1 supplies power to the main singlechip 5, the secondary singlechip 6, the central processing singlechip 7, the manual-automatic switching port 8, the protection detection circuit 9 and the control output circuit 10, and the voltage-stabilizing input power supply 1 supplies power to the main infrared temperature sensor 3 and the secondary infrared temperature sensor 4 after passing through the voltage-reducing circuit 2;
The main infrared temperature sensor 3 and the auxiliary infrared temperature sensor 4 are used for reading a temperature rise value of a stove changing in real time and are respectively connected with the main singlechip 5 and the auxiliary singlechip 6 through SMBUS protocol signal lines, and the main singlechip 5 and the auxiliary singlechip 6 are respectively used for receiving the real-time temperature rise values transmitted by the main infrared temperature sensor 3 and the auxiliary infrared temperature sensor 4, converting the real-time temperature rise values into integral temperature data, performing cyclic processing and outputting signals;
the main singlechip 5, the auxiliary singlechip 6, the protection detection circuit 9 and the control output circuit 10 are all connected with the central processing singlechip 7, and the central processing singlechip 7 is used for processing, calculating, detecting, confirming and outputting relevant signals of opening, speed regulation and delayed closing of the range hood;
Mutual connection between manual automatic switch-over port 8, protection detection circuitry 9, the control output circuit 10, manual automatic switch-over port 8 is used for controlling smoke ventilator's manual control and automatic control's switching, protection detection circuitry 9 is used for preventing manual control and automatic control simultaneous working and prevents speed governing relay K2, K3 simultaneous working, control output circuit 10 is used for controlling smoke ventilator's relay and opens and close to control opening, speed governing and closing of smoke ventilator.
As shown in fig. 6, one embodiment of the present case: the main infrared temperature sensor 3 and the auxiliary infrared temperature sensor 4 both adopt MLX90614AAA type infrared temperature sensors (the MLX90614AAA type infrared temperature sensors can work normally within 4.0V-4.6V), and the main singlechip 5, the auxiliary singlechip 6 and the central singlechip 7 all adopt STC89C52RC type chips (the maximum working voltage of the singlechip STC89C52RC chip is 5.5V, and the maximum limit is not more than 5.5V).
the voltage-stabilizing input power supply 1 supplies power for 5V of voltage-stabilizing input, voltage is reduced by 0.8V-1.0V through the voltage-reducing circuit 2 to supply power for the main infrared temperature sensor 3 and the auxiliary infrared temperature sensor 4, the voltage-reducing circuit 2 comprises an R1 resistor 11, an R2 resistor 12 and a Q10 triode 13, the voltage-stabilizing input power supply system only supplies power for voltage reduction, the rest of the voltage-stabilizing input power supply system are supplied power for 5V of voltage-stabilizing input, and all digital values can be adjusted below.
the minimum value of the temperature rise value of each section of data in the lowest real-time segmentation processing is set to be 25 (the minimum set value in the single chip microcomputer program is more than 25, and the low level is output once).
The data of the real-time temperature reading of the main infrared temperature sensor 3 and the sub infrared temperature sensor 4 are respectively output with the main singlechip 5 and the sub singlechip 6 through an SMBUS protocol SCL (clock line) and an SDA (data line) to confirm transmission data, and are respectively connected with respective P1.2 (SDA) and P1.3(SCL) ports of the main singlechip 5 and the sub singlechip 6.
The main single chip computer 5 and the sub single chip computer 6 respectively carry out the program processing circulation in the chip, 8 sections are respectively and correspondingly output to the respective P0.0-P0.7 ports of the main single chip computer 5 and the sub single chip computer 6, each section is a port, the P0.0-P0.7 of the main single chip computer 5 is 8 ports, the P0.0-P0.7 of the sub single chip computer 6 is 8 ports, the 16 ports are totally output, the in-chip program reads the real-time data processing of the main infrared temperature sensor 3 and the sub infrared temperature sensor 4 and converts the real-time data processing into integral temperature data (if the data is 2320, the actual real-time return temperature is 23.20 ℃, the induction range of MLX 90AAA is-70.01 ℃ to 382.19 ℃, the conversion data range is-7001 to 38219 chip 89C52RC program can be calculated), the temperature data value read in the real-time by the upper section and the temperature data value read in the current section are calculated, if the induction range is more than 25, the corresponding high-level P0.0-P0.7 high-level signal output by the sub single chip computer 6 or otherwise is low-P The signal, the main single chip 5, the sub single chip 6 process 8 sections separately, the time required for each section is within 100 milliseconds, the low level signal output by each section is reprocessed within 100 milliseconds, if not more than 25, the high level signal is recovered, and no matter which section outputs the low level signal once, the output is represented once.
The central singlechip 7 is connected with respective P0.0-P0.7 ports (16 ports in total) of the main singlechip 5 and the auxiliary singlechip 6 through # INT0 and # INT1 ports, the central singlechip 7 processes and calculates frequency signals, more than one trigger is provided, the program starts the T0 timer of the central singlechip 7 for 500 milliseconds TO time, the P0.2 port of the central singlechip 7 outputs low level for more than 2 times of starting system signals within the time, otherwise, the TO time is up TO the closing time, the system signals need TO be triggered again, and whether the trigger reaches 3 times within 500 milliseconds is detected again, and if the trigger reaches 3 times, the range hood is started.
the system takes two-speed adjustment as an example, T0 times of information values in a program needing multi-speed adjustment are divided into speed ratio calculation processing to correspondingly define an interface of a central singlechip 7, several ports are needed at several speeds, after P0.2 of the central singlechip 7 outputs low level, the program is closed to # INT1, T0 starts # INT0 and T1 timers of the central singlechip 7 (timing 8000 interrupts, each section is 10 milliseconds), the P1.2 port (namely an output rotating speed fast port) of the central singlechip 7 is set to be high level (default is also high level) by T1-10 interrupts, the P1.4 port (namely an output rotating speed slow port) outputs low level, after T1 interrupts to 1000 interrupts, the times (namely times larger than 25 times) of information storage of # INT0 within 10-1000 interrupt time are processed, and more than one time of triggering is supposed (the system is set to be switched to be high speed for more than 3 times, and is switched to be low speed for less than or equal to 3 times), if the triggering is carried out for more than 3 times, the system is closed at low speed and is opened at high speed, the P1.4 port of the central single chip microcomputer 7 is set at high level, the P1.2 port of the central single chip microcomputer 7 is set at low level (namely the range hood completes the switching from low speed to high speed), meanwhile, T1 returns to the interruption position for 20 times and restores the initial state, and the interruption is carried out in the same way for T1 to 2000 times, 3000 times, 4000 times, 5000 times, 6000 times, 7000 times and 8000 times, and the speed is regulated in the same way. T1 is adjusted once every 1000 times (about 10 seconds), if there is no trigger or the trigger frequency information is less than or equal to 3 times, T1 is interrupted 1050 times to 1850 times (about 8 seconds) at the same time, the main singlechip 5 and the sub singlechip 6 mutually confirm that the comparison calculation processing of the temperature data read in real time and stored in real time in 8 seconds and the temperature data read in real time at last (whether the temperature rise of more than 26, namely 0.26 degrees centigrade exists in 8 seconds), the main singlechip 5 and the sub singlechip 6 simultaneously calculate the temperature data read in real time (whether the real time temperature data is more than 4300, namely 43 degrees centigrade at this time), interrupt once to 1000 times, interrupt to 3000 times, interrupt to 5000 times, interrupt to 7000 times, interrupt to 4001 times in T1 times and clear the stored trigger frequency information once, when T1 interrupts to 1000 times, the P0.4 port of the central 7 outputs low level to the main singlechip 5, the P0.4 port outputs low level to the main singlechip 5, After the respective P2.4 ports of the sub-singlechips 6 and the respective P2.7 ports of the main singlechips 5 and the sub-singlechips 6 receive the low level signals, the respective P2.7 ports of the main singlechips 5 and the sub-singlechips 6 are connected with the P0.7 port of the central singlechip 7 in parallel, the respective P2.7 ports output the low level after confirming real-time reading of the stored temperature data, the P0.7 port of the central singlechip 7 receives the low level and confirms (1050 times of T1 interruption) that the P0.4 port is closed to be the high level (the main singlechips 5 and the sub-singlechips 6 store values starting at the moment), when the interruption of T1 reaches 1850 times, the P0.3 port of the central singlechips 7 outputs the low level to the respective P2.3 ports of the main singlechips 5 and the sub-singlechips 6, the main singlechips 5 and the sub-singlechips 6 respectively receive the P2.3 port low level, at the moment, the temperature data stored in real time by the main singlechips 5 and the sub-chips 6 output the low level to the P2.6 port of the central singlechips 7, the P2.6 port of the sub-singlechip 6 outputs low level to the P1.6 port of the central singlechip 7, if the temperature data stored when 1050 is interrupted before T1 is less than or equal to 4300 for calculation and processing, if the temperature is more than 26 rise within 8 seconds, the P2.6 port of the main singlechip 5 outputs low level to the P0.6 port of the central singlechip 7, the P2.6 port of the sub-singlechip 5 outputs low level to the P1.6 port of the central singlechip 7, if the temperature is less than or equal to 26 rise, the P2.5 port of the main singlechip 5 outputs low level to the P0.5 port of the central singlechip 7, the P2.5 port of the sub-singlechip 5 outputs low level to the P1.5 port of the central singlechip 7, if the T1 interruption reaches 1900 times, such as the P0.6 port of the central singlechip 7, the P1.6 port returns 20 times and restores the initial state if one or one of the T1 port is low level, such as T1 reaches the interruption 0, such as the temperature data when 1950 is less than or 1958 seconds, the P0.6 port of the central singlechip 7 is less than or equal to 26 rise and the P0.5 port is less than, If the P1.5 ports are all low level, the T1 is interrupted for 1950 times and continues to execute downwards, for example, the P0.5 port and the P1.5 port of the central single-chip microcomputer 7 are all low level, only one port is low level, the T1 interruption can not reach the time of 1950 times, as 1900 times of processing returns to 20 times and the initial state is recovered, the P0.1 port of the central single-chip microcomputer 7 outputs low level after the calculation processing of the T1 times and 1950 times, the P2.1 port of the main single-chip microcomputer 5 and the sub single-chip microcomputer 6 receives low level, the port with low level opened is recovered to high level, the T1 is interrupted to 2000 times of processing speed regulation, the T1 does not reach 4 times or more triggers within 10 times to 2000 times, the T1 is interrupted to 2200 times, the P0.1 port of the central single-chip microcomputer 7 recovers to high level, the sections of 3000 times, 5000 times and 7000 times of interruption, the T1 interruption reaches the No. 4 times of triggering within 8200 times, the P0.1 port of triggering returns to zero clearing, the stored times of triggering, the system information is recovered to the state after the system is completely Completing a delayed shutdown).
The manual-automatic switching port 8 comprises a normally closed 2 nd pin and a normally closed 3 rd pin of a K1 starting relay 15, a normally opened 3 rd pin and a normally opened 4 th pin of a K2 quick relay 16, a normally opened 3 rd pin and a normally opened 4 th pin of a K3 slow relay 17 and an input end of an optical coupler 18.
The protection detection circuit 9 comprises a coil anode, a 2 nd pin, a 3 rd pin, a 5 th pin and a 6 th pin of a K1 starting relay 15, a coil anode, a 6 th pin and a 7 th pin of a K2 quick relay 16, and a coil anode, a 6 th pin and a 7 th pin of a K3 slow relay 17.
The positive pole of a coil of a K1 starting relay 15 is connected in series with a resistor R9 to a base of a triode Q9 through a diode D6 and a collector of a triode Q12 is connected in series with a diode D7 to be connected with a base of the triode Q9 through a diode D7, when the range hood is not started, no voltage exists at the moment, for example, the collector of the triode Q12 or the positive pole of the coil of the K1 starting relay 15 has voltage (1.1V-system voltage), a P2.1 port of a central singlechip 7 is pulled to be at a low level by a resistor R10 through the collector of the triode Q9, a program of the central singlechip 7 does not work, meanwhile, a P2.7 port of the central singlechip 7 outputs a low level indication, the positive pole of a coil of a K2 quick relay 16, the positive pole of a coil of a K3 slow relay 17 through a diode D4, the positive pole of the coil of a K3 slow relay 17, the D5 diode, the resistor R11 is connected in series with the base of the triode Q8, when the coils, the P2.2 port of the central singlechip 7 is pulled by a resistor R12 through a collector of a transistor Q7 to GND to be low level, the central singlechip 7 is closed and does not work within 30 milliseconds after a system program is started under an over-starting condition, the K2 fast relay 16 and the K3 slow relay 17 do not work (the K2 fast relay 16 and the K3 slow relay 17 need 100 milliseconds to work after being started), meanwhile, the P2.7 port of the central singlechip 7 outputs a low level indication, a pin 1 of the optocoupler 18 (the model is PC817C (U6)) is connected with a resistor R18 in series to the other end of a resistor R18, the other end of the resistor R18 and a pin 2 have (3V-6V) voltage, the other end of the optocoupler 18 conducts the system voltage and outputs a pin 3 voltage through a pin 4 to be connected with the resistor R17 in series to the base of the transistor Q8, the P1.7 port of the central singlechip 7 is pulled by a resistor R16 through a collector of the transistor, meanwhile, a P2.7 port of the central singlechip 7 outputs a low level indication, after the system is started, a P0.2 port low level signal of the central singlechip 7 is used for pulling a Q11 triode emitter to GND through an R20 resistor to a Q11 triode base, a Q11 triode collector is connected with GND, a Q12 triode base is used for pulling GND through a Q11 triode emitter through an R19 resistor, a Q12 triode is conducted, the Q12 triode emitter is connected with system voltage, the Q12 triode collector is output and connected with a K1 5 pin K1 of the starting relay 15, after the action of the starting relay 15, the positive pole of a manual control power supply is disconnected by using a normally closed contact 2 pin and a 3 pin, so that the manual control power supply cannot work, meanwhile, a normally open contact 5 pin provides 4.9V (the system voltage is reduced by about 0.1V through a Q12 triode) to a common 7 pin of the K2 quick relay 16 and the K3 slow relay 17, a normally closed contact 6 pin of the K2 quick relay 16 is connected with an emitter of, the emitter of a normally-closed 6-pin Q5 triode 21 of the K3 slow relay 17 supplies power (provides K2 coil voltage), the power supply for controlling a K2 fast relay 16 coil needs the K3 slow relay 17 to be provided without being operated normally closed, the power supply for controlling the K3 slow relay 17 needs the K2 fast relay 16 to be provided without being operated normally closed, the K2 fast relay 16 and the K3 slow relay 17 cannot work simultaneously, and meanwhile, the K2 fast relay 16 and the K3 slow relay 17 work, the Q12 triode is required to be conducted, and the K1 starts the relay 15 to work.
The control output circuit 10 comprises a Q4 triode 20 and a Q12 triode 19 corresponding to the K1 starting relay 15, a Q5 triode 21 corresponding to the K2 quick relay 16, a Q6 triode 22 corresponding to the K3 slow relay 17, a D1 diode 23 connected in parallel with the coil of the K1 starting relay 15, a D2 diode 24 connected in parallel with the coil of the K2 quick relay 16, and a D3 diode 25 connected in parallel with the coil of the K3 slow relay 17.
The P0.2 port of the central singlechip 7 is supplied to the base of a Q11 triode through an R20 resistor, the collector of a Q11 triode is connected with GND, the emitter of a Q11 triode is supplied to the base of a Q12 triode through an R19 resistor, the emitter of a Q12 triode is connected with system voltage, the collector of a Q12 triode is connected with the 5 pin of a K1 relay, the P0.2 port of the central singlechip 7 is supplied to the base of a Q1 triode through an R3 resistor, the collector of a Q1 triode is connected with GND, the emitter of a Q1 triode is supplied to the base of a Q4 triode 20 through an R6 resistor, the emitter of the Q4 triode 20 is connected with the system voltage, the collector is connected with the positive pole of a coil of a K1 starting relay 15, if the P0.2 port of the central singlechip 7 is a low-level Q4 triode 20, a voltage of 4.9V (the conduction of the Q4 triode is about 0.1V) is obtained, the voltage drop of the voltage of the collector of the Q4 triode 20 is obtained, the K1V is used for driving the K1, the collector of a Q2 triode is connected with GND, the emitter of a Q2 triode is used for providing a base of a Q5 triode 21 through an R7 resistor, the emitter of a Q5 triode 21 is connected with a normally closed 6 pin of a K3 slow relay 17, the collector of a Q5 triode is connected with the positive electrode of a K2 fast relay 16 coil, if P1.2 of a central singlechip 7 is low level, the collector of the Q5 triode 21 is connected with the normally open 5 of a Q12 triode through the Q12 triode emitter by system voltage, the normally open 5 of a relay 15 is started through K1, the 6 pin is connected with the K3 slow relay 16 through the normally closed 6 pin of the K3 slow relay, the 7 pin is connected with the Q5 triode emitter through a Q585 to obtain 4.8V (about 0.2V voltage drop of the Q5 and Q12 triodes), the P1.4 port of the central singlechip is provided with the base of a Q3 triode through an R5 resistor, the collector of a Q582 triode 6959 is connected with GND, the emitter of, if the P1.4 of the central singlechip 7 is low level, the collector of the Q6 triode 22 passes through 4.9V voltage of the collector of the Q12 triode, the normally closed 6 of the K2 quick relay 16 and the emitter of the Q6 triode are conducted, and the collector of the Q6 triode obtains about 4.8V (about 0.2V voltage drop when the triodes of Q6 and Q12 are conducted) voltage to drive the K3 slow relay 17 to suck.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are included in the scope of the present invention.
Claims (10)
1. The method for automatically controlling the range hood by infrared temperature induction is characterized in that: the temperature rise value of the gas cooker is detected in real time, segmented circulation processing is carried out through a single chip microcomputer chip, the temperature rise value read in real time in the previous section is stored, the temperature rise value read again in the next section is compared with the temperature rise value read in the previous section to form circulation, and the opening, the speed regulation and the closing of the range hood are controlled according to the number of times that the temperature rise value reaches the program set value in the set time period.
2. The method of automatically controlling the range hood by sensing the infrared temperature according to claim 1, wherein the range hood is turned on when the number of times that the temperature rise value in a set time period reaches the minimum value of the temperature rise value of each section of data in the lowest real-time segmentation process is greater than a program set value;
After the range hood is started, the number of times that the temperature rise value reaches the minimum value of the temperature rise value of each section of data in the lowest real-time segmentation process in a set time period is larger than a program set value, the rotating speed of the range hood is increased, and the number of times that the temperature rise value reaches the minimum value of the temperature rise value of each section of data in the lowest real-time segmentation process in the set time period is smaller than or equal to the program set value, and the rotating speed of the range hood is decreased;
and when the number of times that the temperature rise value reaches the specified value in the set time period is less than a program set value under the condition that the rotating speed of the range hood is slowed is met, the range hood is turned off in a delayed mode.
3. A control system of an infrared temperature sensing automatic control range hood is controlled according to the method of the non-contact infrared temperature sensing automatic control range hood of claim 1 or 2, and is characterized by comprising a voltage-stabilizing input power supply (1), a voltage-reducing circuit (2), a main infrared temperature sensor (3), a secondary infrared temperature sensor (4), a main singlechip (5), a secondary singlechip (6), a central singlechip (7), a manual automatic switching port (8), a protection detection circuit (9) and a control output circuit (10), wherein the voltage-stabilizing input power supply (1) supplies power to the main singlechip (5), the secondary singlechip (6), the central processing singlechip (7), the manual automatic switching port (8), the protection detection circuit (9) and the control output circuit (10), and the voltage-stabilizing input power supply (1) supplies power to the main infrared temperature sensor (3) and the control output circuit (10) after passing through the voltage-reducing circuit (2), The auxiliary infrared temperature sensor (4) supplies power;
The main infrared temperature sensor (3) and the auxiliary infrared temperature sensor (4) are used for reading a temperature rise value of the stove changing in real time and are respectively connected with the main singlechip (5) and the auxiliary singlechip (6) through SMBUS protocol signal lines, and the main singlechip (5) and the auxiliary singlechip (6) are respectively used for receiving the real-time temperature rise value transmitted by the main infrared temperature sensor (3) and the auxiliary infrared temperature sensor (4), converting the real-time temperature rise value into integer temperature data, performing cyclic processing and outputting signals;
The main singlechip (5), the auxiliary singlechip (6), the protection detection circuit (9) and the control output circuit (10) are all connected with the central processing singlechip (7), and the central processing singlechip (7) is used for processing, calculating, detecting, confirming and outputting relevant signals of starting, speed regulating and delayed closing of the range hood;
the utility model discloses a range hood, including manual automatic switch-over port (8), protection detection circuitry (9), control output circuit (10), interconnect between manual automatic switch-over port (8), protection detection circuitry (9), control output circuit (10), manual automatic switch-over port (8) are used for controlling range hood's manual control and automatic control's switching, protection detection circuitry (9) are used for preventing manual control and automatic control simultaneous working and prevent speed governing relay simultaneous working, control output circuit (10) are used for controlling range hood's relay and open and close to control range hood open, speed governing and close.
4. the control system of the infrared temperature sensing automatic control range hood according to claim 3, characterized in that: the voltage-stabilizing input power supply (1) supplies power for 5V of voltage-stabilizing input, and the voltage-reducing circuit (2) reduces the voltage of the voltage-stabilizing input power supply (1) by 0.8V-1.0V for supplying power.
5. The control system of the infrared temperature sensing automatic control range hood according to claim 3, characterized in that: the voltage reduction circuit (2) comprises an R1 resistor (11), an R2 resistor (12) and a Q10 triode (13).
6. The control system of the infrared temperature sensing automatic control range hood according to claim 3, characterized in that: the manual automatic switching port (8) comprises a normally closed 2 nd pin and a normally closed 3 rd pin of a K1 starting relay (15), a normally open 3 rd pin and a normally open 4 th pin of a K2 quick relay (16), a normally open 3 rd pin and a normally open 4 th pin of a K3 slow relay (17) and an input end of an optical coupler (18).
7. The control system of the infrared temperature sensing automatic control range hood according to claim 3, characterized in that: the protection detection circuit (9) comprises a coil anode, a 2 nd pin, a 3 rd pin, a 5 th pin and a 6 th pin of a K1 starting relay (15), a coil anode, a 6 th pin and a 7 th pin of a K2 quick relay (16), and a coil anode, a 6 th pin and a 7 th pin of a K3 slow relay (17).
8. the control system of the infrared temperature sensing automatic control range hood according to claim 3, characterized in that: the control output circuit (10) comprises a Q4 triode (20) and a Q12 triode (19) corresponding to the K1 starting relay (15), a Q5 triode (21) corresponding to the K2 quick relay (16), a Q6 triode (22) corresponding to the K3 slow relay (17), a D1 diode (23) connected to the coil of the K1 starting relay (15) in parallel, a D2 diode (24) connected to the coil of the K2 quick relay (16) in parallel, and a D3 diode (25) connected to the coil of the K3 slow relay (17) in parallel.
9. The control system of the infrared temperature sensing automatic control range hood according to claim 3, characterized in that: the main infrared temperature sensor (3) and the auxiliary infrared temperature sensor (4) both adopt MLX90614AAA type infrared temperature sensors.
10. The control system of the infrared temperature sensing automatic control range hood according to claim 3, characterized in that: the master singlechip (5), the slave singlechip (6) and the central singlechip (7) are STC89C52RC chips.
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