CN205079291U - Smoke ventilator intelligent control circuit based on smog concentration detection - Google Patents
Smoke ventilator intelligent control circuit based on smog concentration detection Download PDFInfo
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- CN205079291U CN205079291U CN201520798079.7U CN201520798079U CN205079291U CN 205079291 U CN205079291 U CN 205079291U CN 201520798079 U CN201520798079 U CN 201520798079U CN 205079291 U CN205079291 U CN 205079291U
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- operational amplifier
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- conversion chip
- smokescope
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Abstract
The utility model discloses a smoke ventilator intelligent control circuit based on smog concentration detection, its key lies in: including smog concentration detection circuit, temperature measurement circuit, treater, motor of kitchen ventilator, smog concentration detection circuit connection has at least one smoke transducer, smoke transducer installs border department under the smoke ventilator front shroud, and just to the outer huo gai centre of a circle of gas range, this smoke transducer gives the treater with the smog concentration signal transmission that detects, temperature measurement circuit adopts the thermistor silk to detect temperature signal, and this thermistor silk transmits the temperature signal who detects for the treater, the treater is according to smog concentration signal and the work of temperature signal control motor of kitchen ventilator. Beneficial effect: when using the gas range, the smoke ventilator automatic start, convenience of customers uses, through smog and the dual detection of temperature, avoid smoke ventilator to start because of smog such as candle disturb the mistake.
Description
Technical field
The utility model relates to smoke exhaust ventilator control circuit, specifically, is a kind of smoke exhaust ventilator intelligent control circuit detected based on smokescope.
Background technology
In high temperature cooking process, lipid contained by grease, food and the carbohydrate, protein, amino acid etc. in food react, the intermediate product produced and end product mainly contain aldehyde, ketone, hydrocarbon, aliphatic acid, alcohol, aromatic compound, cruel, interior vinegar, heterocyclic compound etc., after being inhaled people by human body, there is stronger stimulation to nose, eye, mucosa, the breathing problems such as rhinitis, sphagitis, tracheitis can be caused.Therefore, smoke exhaust ventilator has become an indispensable part in kitchen.At present, smoke exhaust ventilator on market is all the switch by manually carrying out operating smoke exhaust ventilator, but people in use forget unlatching smoke exhaust ventilator sometimes, or open not in time, cause oil smoke to amass to be difficult to get rid of totally in kitchen, and owing to being all that manually switch operates, all bring a lot of troubles to the life of people.
Utility model content
In view of this, the utility model provides a kind of smoke exhaust ventilator intelligent control circuit detected based on smokescope, is detected, avoid smoke exhaust ventilator error starting by smog and temperature dual.
Concrete technical scheme is as follows:
A kind of smoke exhaust ventilator intelligent control circuit detected based on smokescope, its key is: comprise smokescope testing circuit, temperature sensing circuit, processor, fume exhauster motor, described smokescope testing circuit is connected with at least one Smoke Sensor, described Smoke Sensor is arranged on smoke exhaust ventilator front shroud lower edge place, just to the gas range outer fire cover center of circle, this Smoke Sensor by the smokescope signal transmission that detects to processor; Described temperature sensing circuit adopts thermistor wire detected temperatures signal, and the temperature signal detected is passed to processor by this thermistor wire, and described processor controls fume exhauster motor work according to smokescope signal and temperature signal.
In the utility model, described smokescope testing circuit is also provided with the first amplifying circuit and A/D change-over circuit; First output of described Smoke Sensor is connected with the in-phase end of the operational amplifier Q1 in described first amplifying circuit after resistance R1, the second output head grounding of described Smoke Sensor; The in-phase end also ground connection after resistance R2 of described operational amplifier Q1, the output of described operational amplifier Q1 is connected with the end of oppisite phase of operational amplifier Q1 after resistance R3; Described A/D change-over circuit adopts A/D conversion chip LTC2480, and the output of described operational amplifier Q1 is connected on the IN+ end of A/D conversion chip after resistance R4, and the IN+ end of described A/D conversion chip is also through electric capacity C2 ground connection; The VCC termination power VCC of described A/D conversion chip, the VCC end also ground connection after electric capacity C4 of described A/D conversion chip; The SDI end of described A/D conversion chip is on the digital signal output end that resistance R7 is connected on described processor, the SLCK end of described A/D conversion chip is on the clock signal output terminal that resistance R8 is connected on described processor, the SDO end of described A/D conversion chip is on the digital signal input end that resistance R9 is connected on described processor, described A/D conversion chip /CS end is connected on the enable signal output of described processor through resistance R10, FO and GND of described A/D conversion chip holds equal ground connection.
In addition, voltage follower Q2 is also provided with in described smokescope testing circuit, the positive terminal of described voltage follower Q2 meets power supply VCC after resistance R5, the output of described voltage follower Q2 is connected with the end of oppisite phase of voltage follower Q2, the output of described voltage follower Q2 is also connected on the end of oppisite phase of described operational amplifier Q1 after resistance R6, the output of described voltage follower Q2 is also held with the VERF of described A/D conversion chip and is connected, and the VREF end of described A/D conversion chip is also through electric capacity C3 ground connection; The output of described voltage follower Q2 is also held with the IN-of described A/D conversion chip and is connected, and the IN-end of described A/D conversion chip is also through electric capacity C3 ground connection.
Kitchen can be detected through above-mentioned smokescope testing circuit and whether there is smog, the smog interference of the generations such as candle may be there is due to kitchen, cause Smoke Sensor flase drop, smoke exhaust ventilator is started automatically.In order to avoid this situation, in the utility model, be also provided with temperature sensing circuit, whether change in order to detect temperature on gas range, when described processor detects smog and temperature two signals, just control fume exhauster motor work simultaneously.
Described temperature sensing circuit comprises Wheatstone bridge W and the second amplifying circuit, the 1 termination high level of described Wheatstone bridge W, 3 end ground connection, 2 ends and 4 ends are as Wheatstone bridge W output, it is wherein described thermistor wire between 1 end and 2 ends, 2 ends of Wheatstone bridge W are connected with the in-phase end of the operational amplifier Q3 in described second amplifying circuit, the end of oppisite phase of this operational amplifier of output termination Q3 of described operational amplifier Q3, the output of described operational amplifier Q3 is also connected with the end of oppisite phase of operational amplifier Q5 after resistance R12, 4 ends of described Wheatstone bridge W are connected with the in-phase end of the operational amplifier Q4 in described second amplifying circuit, the end of oppisite phase of this operational amplifier of output termination Q4 of described operational amplifier Q4, the output of described operational amplifier Q4 is connected with the in-phase end of operational amplifier Q5 after resistance R13, the in-phase end also ground connection after resistance R14 of described operational amplifier Q5, the output of described operational amplifier Q5 is connected with the end of oppisite phase of operational amplifier Q5 through resistance R15, the output of described operational amplifier Q5 is also connected with the end of oppisite phase of operational amplifier Q6 after resistance R16, the end of oppisite phase of described operational amplifier Q6 meets power supply VCC after resistance R17, in-phase end ground connection after resistance R18 of described operational amplifier Q6, the output of described operational amplifier Q6 is connected on the input end of analog signal of described processor after resistance R19.
In use, there is not flame below outer fire cover in gas range, and can heat up below outer fire cover when gas range uses, and therefore described thermistor wire is coiled into the annulus concentric with gas range outer fire cover, under being embedded in outer fire cover.
In a particular embodiment, described processor adopts Philip 83C751 series monolithic.
Beneficial effect: when using gas range, smoke exhaust ventilator starts automatically, is user-friendly to; Detected by smog and temperature dual, avoid the smog interference error starting that smoke exhaust ventilator produces because of candle etc.
Accompanying drawing explanation
Fig. 1 is system construction drawing of the present utility model;
Fig. 2 is smokescope testing circuit figure in Fig. 1;
Fig. 3 is temperature sensing circuit figure in Fig. 1;
Fig. 4 is processor connecting circuit figure in Fig. 1;
Fig. 5 is Smoke Sensor and the temperature-detecting device installation site schematic diagram on the kitchen range top in Fig. 1.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail.
A kind of smoke exhaust ventilator intelligent control circuit detected based on smokescope as shown in Figure 1, its key is: comprise smokescope testing circuit, temperature sensing circuit, processor, fume exhauster motor, smokescope testing circuit by the smokescope signal transmission that detects to processor, the temperature signal detected is passed to processor by described temperature sensing circuit, and described processor controls fume exhauster motor work according to smokescope signal and temperature signal.
Described smokescope testing circuit comprises Smoke Sensor, the first amplifying circuit and A/D change-over circuit; Described A/D change-over circuit adopts A/D conversion chip LTC2480; As shown in Figure 2, U1 represents described A/D conversion chip to smokescope testing circuit in fig. 2, and SENSOR represents described Smoke Sensor; As shown in Figure 4, U2 represents processor to the annexation of smokescope testing circuit and processor, adopts Philip 83C751 series monolithic; First output of SENSOR is connected with the in-phase end of the operational amplifier Q1 in described first amplifying circuit after resistance R1, second output head grounding of SENSOR; The in-phase end also ground connection after resistance R2 of described operational amplifier Q1, the output of described operational amplifier Q1 is connected with the end of oppisite phase of operational amplifier Q1 after resistance R3; The output of described operational amplifier Q1 is connected on the IN+ end of U1 after resistance R4; The IN+ end of U1 is also through electric capacity C2 ground connection, and the IN-of U1 holds through electric capacity C3 ground connection, the VCC termination power VCC of U1, and the VCC of this U1 holds also ground connection after electric capacity C4; The SDI end of U1 is connected on the P1.0 end of U2 through resistance R7, and now, the P1.0 end of U2 is as digital signal output end; The P1 mouth of Philip 83C751 series monolithic as digital signal output end, also can be used as digital signal input end; The SLCK end of U1 is connected on the clock signal output terminal of U2 through resistance R8, and the P0.0 of U2 is as clock signal output terminal, and the SDO end of U1 is connected on the P1.1 of U2 through resistance R9, and now, the P1.1 end of U2 is as digital signal input end; U1 /CS end is connected on the P1.7 end of U2 through resistance R10, FO and GND of described A/D conversion chip U1 holds equal ground connection.
Voltage follower Q2 is also provided with in described smokescope testing circuit, the positive terminal of described voltage follower Q2 meets power supply VCC after resistance R5, the output of described voltage follower Q2 is connected with the end of oppisite phase of voltage follower Q2, the output of described voltage follower Q2 is also connected on the end of oppisite phase of described operational amplifier Q1 after resistance R6, for described operational amplifier Q1 provides bias voltage; The output of described voltage follower Q2 is also held with the VERF of described A/D conversion chip U1 and is connected, for described A/D conversion chip U1 provides reference voltage, and the VERF of described A/D conversion chip U1 holds also through electric capacity C3 ground connection, the output of described voltage follower Q2 is also held with the IN-of described A/D conversion chip U1 and is connected, and this IN-holds also through electric capacity C3 ground connection.
Kitchen can be detected through above-mentioned smokescope testing circuit and whether there is smog, the smog interference of the generations such as candle may be there is due to kitchen, cause Smoke Sensor flase drop, smoke exhaust ventilator is started automatically.In order to avoid this situation, in the utility model, be also provided with temperature sensing circuit, whether change in order to detect temperature on gas range, when described processor U2 detects smog and temperature two signals, just control fume exhauster motor work simultaneously.
Described temperature sensing circuit comprises Wheatstone bridge W and the second amplifying circuit, as seen in Figure 3, it is described thermistor wire 3 between 1 end of described Wheatstone bridge W and 2 ends, 1 termination high level, 3 end ground connection, 2 ends and 4 ends are as Wheatstone bridge W output, 2 ends of Wheatstone bridge W are connected with the in-phase end of the operational amplifier Q3 in described second amplifying circuit, the end of oppisite phase of this operational amplifier of output termination Q3 of described operational amplifier Q3, the output of described operational amplifier Q3 is also connected with the end of oppisite phase of operational amplifier Q5 after resistance R12, 4 ends of described Wheatstone bridge W are connected with the in-phase end of the operational amplifier Q4 in described second amplifying circuit, the end of oppisite phase of this operational amplifier of output termination Q4 of described operational amplifier Q4, the output of described operational amplifier Q4 is connected with the in-phase end of operational amplifier Q5 after resistance R13, the in-phase end also ground connection after resistance R14 of described operational amplifier Q5, the output of described operational amplifier Q5 is connected with the end of oppisite phase of operational amplifier Q5 through resistance R15, the output of described operational amplifier Q5 is also connected with the end of oppisite phase of operational amplifier Q6 after resistance R16, the end of oppisite phase of described operational amplifier Q6 meets power supply VCC after resistance R17, in-phase end ground connection after resistance R18 of described operational amplifier Q6, the output of described operational amplifier Q6 is connected on the input end of analog signal P3.2 of described processor U2 after resistance R19.
As shown in Figure 5, wherein 1 is outer fire cover to above-mentioned Smoke Sensor and the temperature-detecting device installation site schematic diagram on the kitchen range top, and 2 is inner fire cover, 3 is the thermistor wire in Wheatstone bridge W, and 4 represent gas range face plate, and 5 is gas range knob, 6 is Smoke Sensor, and 7 is smoke exhaust ventilator front shroud; In the present embodiment, described thermistor wire 3 is coiled into the annulus concentric with gas range outer fire cover 1, is embedded in outer fire cover 1 time, Smoke Sensor 6 is arranged on smoke exhaust ventilator front shroud 7 lower edge place, just to gas range outer fire cover 1 center of circle, in the present embodiment, only a Smoke Sensor is installed.
In the present embodiment, as shown in Figure 4, directly P3.0 and the P3.1 mouth of processor U2 is connected on the drive circuit of fume exhauster motor MOTOR, described processor U2 adopts Philip 83C751 series monolithic, the RST end of described processor U2 meets power supply VCC through electric capacity C5, the RST end of described processor U2 is also through resistance R11 ground connection, and the two ends of described electric capacity C5 are parallel with switch S 1.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. the smoke exhaust ventilator intelligent control circuit detected based on smokescope, it is characterized in that: comprise smokescope testing circuit, temperature sensing circuit, processor, fume exhauster motor, described smokescope testing circuit is connected with at least one Smoke Sensor, described Smoke Sensor is arranged on smoke exhaust ventilator front shroud lower edge place, just to the gas range outer fire cover center of circle, this Smoke Sensor by the smokescope signal transmission that detects to processor; Described temperature sensing circuit adopts thermistor wire detected temperatures signal, and the temperature signal detected is passed to processor by this thermistor wire, and described processor controls fume exhauster motor work according to smokescope signal and temperature signal;
Described smokescope testing circuit is also provided with the first amplifying circuit and A/D change-over circuit; First output of described Smoke Sensor is connected with the in-phase end of the operational amplifier Q1 in described first amplifying circuit after resistance R1, the second output head grounding of described Smoke Sensor; The in-phase end also ground connection after resistance R2 of described operational amplifier Q1, the output of described operational amplifier Q1 is connected with the end of oppisite phase of operational amplifier Q1 after resistance R3; Described A/D change-over circuit adopts A/D conversion chip LTC2480, and the output of described operational amplifier Q1 is connected on the IN+ end of A/D conversion chip after resistance R4; The VCC termination power VCC of described A/D conversion chip, the SDI end of described A/D conversion chip is on the digital signal output end that resistance R7 is connected on described processor, the SLCK end of described A/D conversion chip is on the clock signal output terminal that resistance R8 is connected on described processor, the SDO end of described A/D conversion chip is on the digital signal input end that resistance R9 is connected on described processor, described A/D conversion chip /CS end is connected on the enable signal output of described processor through resistance R10, FO and GND of described A/D conversion chip holds equal ground connection;
Described temperature sensing circuit comprises Wheatstone bridge W and the second amplifying circuit, the 1 termination high level of described Wheatstone bridge W, 3 end ground connection, 2 ends and 4 ends are as Wheatstone bridge W output, it is wherein described thermistor wire between 1 end and 2 ends, 2 ends are connected with the in-phase end of the operational amplifier Q3 in described second amplifying circuit, the end of oppisite phase of this operational amplifier of output termination Q3 of described operational amplifier Q3, the output of described operational amplifier Q3 is also connected with the end of oppisite phase of operational amplifier Q5 after resistance R12, 4 ends of described Wheatstone bridge W are connected with the in-phase end of the operational amplifier Q4 in described second amplifying circuit, the end of oppisite phase of this operational amplifier of output termination Q4 of described operational amplifier Q4, the output of described operational amplifier Q4 is connected with the in-phase end of operational amplifier Q5 after resistance R13, the in-phase end also ground connection after resistance R14 of described operational amplifier Q5, the output of described operational amplifier Q5 is connected with the end of oppisite phase of operational amplifier Q5 through resistance R15, the output of described operational amplifier Q5 is also connected with the end of oppisite phase of operational amplifier Q6 after resistance R16, the end of oppisite phase of described operational amplifier Q6 meets power supply VCC after resistance R17, in-phase end ground connection after resistance R18 of described operational amplifier Q6, the output of described operational amplifier Q6 is connected on the input end of analog signal of described processor after resistance R19.
2. the smoke exhaust ventilator intelligent control circuit detected based on smokescope according to claim 1, it is characterized in that: in described smokescope testing circuit, be also provided with voltage follower Q2, the positive terminal of described voltage follower Q2 meets power supply VCC after resistance R5, the output of described voltage follower Q2 is connected with the end of oppisite phase of voltage follower Q2, the output of described voltage follower Q2 is also connected on the end of oppisite phase of described operational amplifier Q1 after resistance R6, the output of described voltage follower Q2 is also held with the VERF of described A/D conversion chip and is connected, the output of described voltage follower Q2 is also held with the IN-of described A/D conversion chip and is connected.
3. the smoke exhaust ventilator intelligent control circuit detected based on smokescope according to claim 2, it is characterized in that: the IN+ end of described A/D conversion chip is also through electric capacity C2 ground connection, the IN-end of described A/D conversion chip and VREF end are all through electric capacity C3 ground connection, and the VCC of described A/D conversion chip holds also ground connection after electric capacity C4.
4. the smoke exhaust ventilator intelligent control circuit detected based on smokescope according to claim 1, is characterized in that: described thermistor wire is coiled into the annulus concentric with gas range outer fire cover, under being embedded in outer fire cover.
5. the smoke exhaust ventilator intelligent control circuit detected based on smokescope according to claim 1, is characterized in that: described processor adopts Philip 83C751 series monolithic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520798079.7U CN205079291U (en) | 2015-10-15 | 2015-10-15 | Smoke ventilator intelligent control circuit based on smog concentration detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520798079.7U CN205079291U (en) | 2015-10-15 | 2015-10-15 | Smoke ventilator intelligent control circuit based on smog concentration detection |
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| CN205079291U true CN205079291U (en) | 2016-03-09 |
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| CN201520798079.7U Expired - Fee Related CN205079291U (en) | 2015-10-15 | 2015-10-15 | Smoke ventilator intelligent control circuit based on smog concentration detection |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642267A (en) * | 2017-01-19 | 2017-05-10 | 广东美的厨房电器制造有限公司 | Automatic control method and device for range hood |
| CN107402230A (en) * | 2017-08-01 | 2017-11-28 | 昆明理工大学 | One tobacco articles smokescope measurement apparatus and method |
| CN107449009A (en) * | 2017-09-18 | 2017-12-08 | 于盟盟 | A kind of intelligent fume exhauster |
| CN107449008A (en) * | 2017-09-18 | 2017-12-08 | 于盟盟 | A kind of automatic telescopic intelligent fume exhauster |
| CN109028194A (en) * | 2018-08-08 | 2018-12-18 | 练仕菊 | A kind of self-cleaning kitchen ventilator |
-
2015
- 2015-10-15 CN CN201520798079.7U patent/CN205079291U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642267A (en) * | 2017-01-19 | 2017-05-10 | 广东美的厨房电器制造有限公司 | Automatic control method and device for range hood |
| CN107402230A (en) * | 2017-08-01 | 2017-11-28 | 昆明理工大学 | One tobacco articles smokescope measurement apparatus and method |
| CN107402230B (en) * | 2017-08-01 | 2023-09-26 | 昆明理工大学 | Tobacco product smoke concentration measuring device and method |
| CN107449009A (en) * | 2017-09-18 | 2017-12-08 | 于盟盟 | A kind of intelligent fume exhauster |
| CN107449008A (en) * | 2017-09-18 | 2017-12-08 | 于盟盟 | A kind of automatic telescopic intelligent fume exhauster |
| CN109028194A (en) * | 2018-08-08 | 2018-12-18 | 练仕菊 | A kind of self-cleaning kitchen ventilator |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160309 Termination date: 20181015 |